PC Resolution 2022-013 Griffin Ranch Addendum to EA 2006-577PLANNING COMMISSION RESOLUTION 2022 - 013
A RESOLUTION OF THE PLANNING COMMISSION
OF THE CITY OF LA QUINTA, CALIFORNIA, TO
APPROVE THE ADDENDUM TO EA2006-577 AND
FIND THE PROJECT CONSISTENT WITH THE
PREVIOUSLY ADOPTED MITIGATED NEGATIVE
DECLARATION
CASE NUMBERS: ENVIRONMENTAL ASSESSMENT 2021-0002
APPLICANT: CADO LA QUINTA ESTATES, LLC. C/O CAPSTONE
ADVISORS, INC.
WHEREAS, the Planning Commission of the City of La Quinta, California
did, on May 24, 2022, hold a duly noticed Public Hearing to consider a request
by CADO La Quinta Estates, LLC. C/O Capstone Advisors, Inc. to approve the
Addendum to EA2006-577 and find the project consistent with the previously
adopted Mitigated Negative Declaration (EA2006-577), generally located,
south side of Avenue 54 between Madison Street and Monroe Street, more
particularly described as:
APNS 780-120-001 THRU 780-120-020, 780-120-071, 780-120-072, 780-
120-073, & 780-120-077
WHEREAS, the Planning Commission did previously hold a duly noticed
public hearing on January 25, 2022 to consider said applications and did vote
to continue the public hearing to a date certain at the request of the applicant;
and
WHEREAS, the Planning Commission did previously hold a continued
Public Hearing on February 8, 2022, to consider said applications and did vote
to continue the public hearing to a date uncertain in order to give the
opportunity for the applicant to communicate with surrounding residents; and
WHEREAS, the Design and Development Department did publish a
public hearing notice in The Desert Sun newspaper on January 14, 2022, and
May 13, 2022, as prescribed by the Municipal Code. Public hearing notices
were also mailed to all property owners within 500 feet of the site; and
WHEREAS, at said Public Hearing, upon hearing and considering all
testimony and arguments, if any, of all interested persons desiring to be
Planning Commission Resolution 2022-013
Environmental Assessment 2021-0002
Project: Griffin Ranch (TTM 38083)
Adopted: May 24, 2022
Page 2 of 3
heard, the Planning Commission did make the following mandatory findings
to justify approval of said Environmental Assessment:
1. The proposed project is consistent with the La Quinta General Plan,
and Specific Plan 2004-074, as amended. The Tract Map is consistent
with the Low Density land use designation as set forth in the General
Plan, and as set forth in Specific Plan 2004-074.
2. The proposed project will not result in impacts which are individually
limited or cumulatively considerable when considering planned or
proposed development in the immediate vicinity. Impacts which are
individually limited or cumulatively considerable can be mitigated to
be less than significant.
3. The proposed project and proposed improvements are not likely to
cause substantial environmental damage, nor substantially injure fish
or wildlife or their habitat. The City Council, on April 17, 2007,
adopted a Mitigated Negative Declaration (MND), Environmental
Assessment 2006-577, for the Griffin Ranch Specific Plan and
Tentative Tract 32879 project via Resolution 2007-035, in compliance
with the requirements of the California Environmental Quality Act
(CEQA). The Design and Development Department prepared an
addendum to the adopted MND as EA2021-0002, pursuant to Section
15164 of CEQA, in that the project is substantially the same as the
previously approved project, that conditions have not substantially
changed, and that the findings and mitigation measures contained in
EA 2006-577 shall apply to this project.
NOW, THEREFORE, BE IT RESOLVED by the Planning Commission of
the City of La Quinta, California, as follows:
SECTION 1. That the above recitations are true and constitute the Findings of
the Planning Commission in this case;
SECTION 2. That the above project be determined by the Planning
Commission to be consistent with the Addendum to Environmental
Assessment 2006-577 [Exhibit A];
City of La Quinta Page 1
Draft Addendum October 2021
Draft Addendum to the
Mitigated Negative Declaration
Application for
Tentative Tract Map No. 38083
MND Addendum
LEAD AGENCY:
City of La Quinta
78495 Calle Tampico
La Quinta, CA 92270
APPLICANT:
City of La Quinta
c/o Siji Fernandez, Associate Planner
Design and Development
78495 Calle Tampico
La Quinta, CA 92270
PREPARED BY:
MSA Consulting, Inc.
34200 Bob Hope Drive
Rancho Mirage, CA 92270
PLANNING COMMISSION RESOLUTION 2022-013
ENVIRONMENTAL ASSESSMENT 2021-0002
GRIFFIN RANCH (TTM 38083)
ADOPTED: May 24, 2022
EXHIBIT A
City of La Quinta Page 2
Draft Addendum October 2021
TABLE OF CONTENTS
Title Page No.
Chapter One – Introduction ……………………………………………..…….……3
Chapter Two – Statutory Background…………………………….….…..….……7
Chapter Three – Summary of Original Project………………….….….…………8
Chapter Four – Project Revisions …………………………………..…..….…….10
Chapter Five – Environmental Setting …………………….…………….….……12
Chapter Six – Environmental Impact Analysis…………….….……………...…13
Appendices
Appendix A – Adopted Griffin Ranch Specific Plan (2004-074) and Mitigated Negative
Declaration (EA 2004-526)
Appendix B – CalEEMod Annual Emissions Report – 20 Lots
Appendix C – CalEEMod Summer Emissions Report – 20 Lots
Appendix D – CalEEMod Winter Emissions Report – 20 Lots
Appendix E – CalEEMod Annual Emissions Report – 37 Lots
Appendix F – CalEEMod Summer Emissions Report – 37 Lots
Appendix G – CalEEMod Winter Emissions Report – 37 Lots
Appendix H – TTM No. 38083 VMT Screening and Trip Generation/Access Assessment
City of La Quinta Page 3
Draft Addendum October 2021
CHAPTER ONE – INTRODUCTION
In January 2005, the City of La Quinta adopted a Specific Plan (SP) and Mitigated Negative
Declaration (MND) for the Griffin Ranch Project (Specific Plan No. 2004-074; Resolution 2005-
005; Environmental Assessment 2004-526), referred to herein as “previous project” or “MND”.
The Griffin Ranch MND evaluated the impacts associated with the proposed development of a
roughly U-shaped master planned community includes 303 residential lots, community
clubhouse, streets, retention basins, well sites, internal pedestrian/equestrian trails, and open
space areas on approximately 199 acres. The analysis of the Griffin Ranch project identified
several mitigation measures to address and mitigate potentially significant impacts to less than
significant levels. The adopted Griffin Ranch Specific Plan and MND is included as Appendix A.
The previous project is located on 199 acres of disturbed land located south of Avenue 54, east
of Madison Street, north of 55th Avenue, and approximately 0.25 miles east of Monroe Street in
the City of La Quinta, California. The previous project proposed a General Plan Amendment (GPA
2004-103), a Zone Change (2004-122), a Specific Plan (SP 2004-074), and a Tentative Tract
Map (TTM No. 32879). The General Plan Amendment and Zone Change for the previous project
was proposed to modify the land use designation on the property from Very Low Density and Very
Low Density/Equestrian Overlay, to Low Density Residential. The GPA was also proposed to
modify the roadway classification of Madison Street from a Major Arterial to a Primary Arterial.
The Specific Plan was proposed to establish the design standards and guidelines for the
development of a master planned community.
Since 2005, the Griffin Ranch Specific Plan has undergone two Specific Plan Amendments.
Specific Plan 2004-074 Amendment No. 1 involved the addition of 90 lots, an enlarged clubhouse,
and revised development standards on a separate, roughly square shaped, property located at
the southwest corner of Avenue 54 and Monroe Street. This Amendment also included the
approval of Tentative Tract Map 34642, to add and subdivide approximately 45 acres into 90
residential lots and other amenity lots, and Environmental Assessment 2006-577, which analyzed
the environmental impact of the additional lots. Amendment No. 1 was adopted in April 2007
(Resolution No. 2007-036) and resulted in a total of 393 residential lots on the Griffin Ranch
Specific Plan area. SP 2004-074 Amendment No. 2 proposed to reduce the size of the clubhouse
in the Griffin Ranch Specific Plan from 21,200 square feet to 10,420 square feet. Amendment No.
2 was adopted in 2013.
As previously stated, the Griffin Ranch MND analyzed impacts associated with the proposed
development of 303 residential units, opens space uses, and associated improvements on 199
acres of the Griffin Ranch Specific Plan area. A majority of the western portion of the site has now
been developed with residential lots, community area, paved driveways, and open space areas.
Developed residential lots are scattered throughout the project site. The undeveloped lots onsite
have been graded and sprayed with chemical dust suppressant. All roadways within the Griffin
Ranch property are paved. The eastern-most portion of the Griffin Ranch Specific Plan area
located at the southwest corner of Avenue 54 and Monroe Street (approximately 45 acres added
in Amendment No. 1) is undeveloped.
The revised project proposes the subdivision of 20 existing 1-acre residential lots into 37 half-acre
lots within the Tract Map No. 38083 in the Griffin Ranch Specific Plan area. The 20 lots are
currently graded with previously installed utility infrastructure and are centrally located within the
Griffin Ranch community, in the “interior” of the U-shaped property and directly adjacent to the
Merv Griffin Estate (not a part of the project). The revised project proposes to increase the density
City of La Quinta Page 4
Draft Addendum October 2021
of the Tract Map 38083 area; however, a Specific Plan Amendment is not required based on
substantial conformance through a Director’s Determination.
In accordance with the California Environmental Quality Act (CEQA) and CEQA Guidelines, this
addendum addresses the potential environmental impacts associated with the proposed
residential community and provides an evaluation of potential environmental impacts in relation
to the original project evaluated in the adopted MND. A CEQA MND Addendum does not require
analysis of topics that were not required during the time that the original CEQA document was
adopted, however for informational purposes, new environmental topics required by the most
current CEQA Guidelines have been included. The addendum is an informational document
intended to be used in the planning and decision-making process as provided for under Section
15164 of the CEQA Guidelines. The addendum does not recommend approval or denial of the
proposed modifications of the previous project. The conclusion of this addendum is that the
proposed changes to the project will neither result in new significant impacts nor substantially
increase the severity of previously disclosed impacts beyond those already identified in the
previously adopted MND. Thus, a subsequent MND is not required.
The location of the project site is shown below in Exhibit 1 and 2.
N.T.S.
MSA CONSULTING, INC.
> PLANNING > CIVIL
34200 Bob Hope Drive, Rancho Mirage, CA 92270
760.320.9811 msaconsultinginc.com
VICINITY MAP EXHIBIT
1GRIFFIN RANCH
CEQA ADDENDUM
SITE
AVENUE 50
AVENUE 54
AVENUE 53
AVENUE 52
AIRPORT BLVD.MADISONSTREETJEFFERSONSTREETMONROESTREETJACKSONSTREETGRIFFIN RANCH
AVENUE 54MADISON STREET
N.A.P.MONROE STREETPROPOSED TTM NO. 38083Legend:Griffin Ranch Specific Plan AreaProposed TTM No. 38083N.T.S.MSA CONSULTING, INC.> PLANNING > CIVIL ENGINEERING > LAND SURVEYING34200 Bob Hope Drive, Rancho Mirage, CA 92270760.320.9811 msaconsultinginc.comAERIAL PHOTOGRAPHEXHIBIT2GRIFFIN RANCHCEQA ADDENDUM
City of La Quinta Page 7
Draft Addendum October 2021
CHAPTER TWO – STATUTORY BACKGROUND
The City of La Quinta is the CEQA lead agency responsible for the project. Under CEQA, an
addendum to a certified Environmental Impact Report (EIR) or a Negative Declaration (ND) may
be prepared if minor technical changes or additions to the proposed project are required or if none
of the conditions described in Section 15162 calling for the preparation of a subsequent EIR (or
MND) have occurred (CEQA Guidelines Section 15164[b]). An addendum is appropriate if the
project changes or modifications do not result in any new significant impacts or a substantial
increase in severity of previously identified significant impacts. The addendum need not be
circulated for public review (CEQA Guidelines Section 15164[c]); however, an addendum is to be
considered along by the decision-making body prior to making a decision on the project (CEQA
Guidelines Section 15164[d]).
This MND addendum demonstrates that the environmental analysis, impacts, and mitigation
requirements identified in the MND remain substantively unchanged by the revised project
description detailed herein and supports the findings that the proposed project does not raise any
new issues and does not exceed the level of impacts identified in the previous MND. Further,
rather than only focusing on the characterization of whether the project is “new” or “old”, the City
has also evaluated the previous environmental document to determine if it retains any relevance
in light of the proposed changes, and if any major revisions to the document are required due to
the involvement of new, previously unstudied significant environmental effects. The subsequent
review provisions of CEQA are designed to ensure that an agency proposing changes to a
previously approved project explores environmental impacts not considered in the original
environmental document. This assumes that some of the environmental impacts of the modified
project are considered in the original environmental document, such that the original document
retains relevance to the decision-making process. If it is wholly, irrelevant, then it is only logical
that the agency starts over from the beginning. The City has determined that project changes will
not require major revisions to the initial environmental document. Accordingly, recirculation of the
MND for public review is not necessary, pursuant to Section 15164 of the CEQA Guidelines.
Therefore, a subsequent Negative Declaration pursuant to Section 15162 of the CEQA Guidelines
is not required. To support this decision, the following discussion describes the proposed project
modifications and the associated environmental analysis.
City of La Quinta Page 8
Draft Addendum October 2021
CHAPTER THREE – SUMMARY OF ORIGINAL PROJECT
The previous project includes the Griffin Ranch Specific Plan area on the southeast corner of
Avenue 54 and Madison Street. As stated in Chapter One, the City of La Quinta adopted a Specific
Plan (SP) and Mitigated Negative Declaration (MND) for the Griffin Ranch Project (Specific Plan
No. 2004-074; Resolution 2005-005; Environmental Assessment 2004-526) in January 2005. The
SP and MND proposed and analyzed the proposed development of a master planned community
includes 303 residential lots, community clubhouse, streets, retention basins, well sites, internal
pedestrian/equestrian trails, and open space areas on approximately 199 acres. At the time the
MND was written the site was characterized by partially developed land with agricultural and
equestrian land uses onsite. Lands in the southeastern quadrant of the site were characterized
by vacant desert lands.
In its current condition, the entire site has been disturbed from human-related construction
activities. The site has also been graded throughout. The western portion of the Griffin Ranch
Specific Plan is nearly fully developed with residential homes, community areas, open space
areas, and associated improvements. Developed residential homes are found throughout the
central and eastern portions of the site (the development pattern primarily extends from the
southern and eastern boundaries). However, approximately half of the central and eastern
portions of the site is not developed with residential buildings. These areas are, however, graded
and sprayed with a dust suppressant agent for dust-control purposes. The entire site includes
paved roadways and infrastructure. Access to the site occurs from one point on Madison Street
and two points on Avenue 54.
The previous project site plan is shown below, in Exhibit 3.
N.T.S.MSA CONSULTING, INC.> PLANNING > CIVIL ENGINEERING > LAND SURVEYING34200 Bob Hope Drive, Rancho Mirage, CA 92270760.320.9811 msaconsultinginc.comPREVIOUS PROJECT SITE PLANEXHIBIT3GRIFFIN RANCHCEQA ADDENDUM
City of La Quinta Page 10
Draft Addendum October 2021
CHAPTER FOUR – PROJECT REVISIONS
The revised project proposes Tentative Tract Map Number 38083 (TTM No 38083), which allows
for the subdivision of 20 existing 1-acre residential lots into 37 half-acre lots within on
approximately 25 acres of the Griffin Ranch Specific Plan area resulting in an additional 17 lots.
The 20 lots are currently graded with previously installed utility and road infrastructure and are
centrally located within the Griffin Ranch community directly adjacent to the eastern, western and
southern boundaries of the Merv Griffin Estate. The revised site plan is indicated in Exhibit 4.
The addition of the aforementioned 17 lots would bring the total unit count in Griffin Ranch to 410,
which is below the overall allowable number of 478. In addition, the overall project density will
marginally increase from 1.6 dwelling units per acre (du/ac) to approximately 1.7 du/ac, which is
below the maximum allowed of 2 du/ac.
The proposed project is consistent with the current General Plan and Zoning regulations and a
Specific Plan Amendment is not required based on substantial conformance through a Director’s
Determination. Currently, the SP Land Use Map exhibit has the existing lots under the SP’s
40,000-square-foot lot designation. The appropriate language and graphics have been revised to
reflect the proposed subdivision and show these lots under the SP’s 20,000-square-foot
designation, which is in character with the community and adjoining 20,000-square-foot lots. No
changes are proposed to the existing SP boundary, design guidelines, maximum unit count,
maximum density, or development standards.
As previously stated, the portion of the site to be revised is currently designated for 40,000-
square-foot lots. The 40,000-square-foot designation was established in this area to act as a
buffer between the project and the Merv Griffin Estate, which was a private residential estate.
However, since then, the Merv Griffin Estate has been entitled under the Griffin Lake Specific
Plan for the development of 10,000-square-foot lots, which are directly adjacent to the proposed
project. For this reason, the need for a low-density buffer is no longer necessary and the proposed
20,000-square-foot lot designation is in character with the current and future development plans
for proposed project and the Griffin Lake Specific Plan.
Both the previous and revised projects propose the development of single-family homes on the
project site, and the revised project proposes a slight increase in the total number of units. The
impact analysis contained herein will focus on whether the revised project would result in any new
or more severe impacts not previously identified in the adopted Griffin Ranch Project MND.
N.T.S.MSA CONSULTING, INC.> PLANNING > CIVIL ENGINEERING > LAND SURVEYING34200 Bob Hope Drive, Rancho Mirage, CA 92270760.320.9811 msaconsultinginc.comREVISED PROJECT SITE PLANEXHIBIT4GRIFFIN RANCHCEQA ADDENDUM
City of La Quinta Page 12
Draft Addendum October 2021
CHAPTER FIVE – ENVIRONMENTAL SETTING
The Griffin Ranch Specific Plan area, including the revised project site, is located in the
City of La Quinta, south of Avenue 54, east of Madison Street, north of Avenue 55, and
west of Monroe Street. The previous project analyzed in the MND (Environmental
Assessment 2004-526, adopted in 2005) encompassed approximately 199-acres on a
roughly U-shaped property. An additional 45 acre roughly square shaped property was
included in Amendment No. 1 in 2007. The 2005 MND is analyzed in this Addendum
document. The western portion of the Griffin Ranch Specific Plan is nearly fully developed.
Developed residential homes are found throughout the central and eastern portions of the
site. Approximately half of the central and eastern portions of the site is vacant.
Madison Street, west of the site, Avenue 54, north of the site, and Monroe Street, east of
the site, are paved. The area surrounding the project site is characterized by developed,
residential lots to the west, vacant lots to the south and east, and the Merv Griffin Estate
to the north. A golf course residential community is located north of Avenue 54.
The revised property occupies approximately 25 acres of the Griffin Ranch SP area and
would occur within Tract Map No. 38083 (TTM No. 38083). TTM No. 38083 is located
adjacent to the Merv Griffin Estate property. TTM No. 38083 is located in a portion of the
north one-half of Section 15, Township 6 South, Range 7 East, San Bernardino Meridian.
The project is located within the City of La Quinta’s Low Density Residential (RL) with
Equestrian Overlay zone. The existing land use designation for the site is Low Density
Residential with Equestrian Overlay. The project does not propose changes to the existing
zone and land use designations.
The project’s land use is shown in Exhibit 5 and zoning is shown in Exhibit 6. The location
of the project site is shown in Exhibit 1 and 2.
MADISON STREET
MONROE STREET AVENUE 54GRIFFIN RANCHSPECIFIC PLANLegend:Griffin Ranch Specific Plan Boundary Low Density ResidentialMajor Community FacilitiesOpen Space - RecreationN.T.S.MSA CONSULTING, INC.> PLANNING > CIVIL ENGINEERING > LAND SURVEYING34200 Bob Hope Drive, Rancho Mirage, CA 92270760.320.9811 msaconsultinginc.comEXISTING LAND USEEXHIBIT5GRIFFIN RANCHCEQA ADDENDUM
AVENUE 54MADISON STREET
MONROE STREETGRIFFIN RANCHSPECIFIC PLANLegend:Griffin Ranch SP Boundary Very Low Density Residential (RVL)Low Density Residential (RL)Major Community Facilities (MC)Parks and Recreation (PR)Open Space (OS)Golf Course (GC)Equestrian OverlayN.T.S.MSA CONSULTING, INC.> PLANNING > CIVIL ENGINEERING > LAND SURVEYING34200 Bob Hope Drive, Rancho Mirage, CA 92270760.320.9811 msaconsultinginc.comEXISTING ZONINGEXHIBIT6GRIFFIN RANCHCEQA ADDENDUM
City of Coachella Page 15
Draft Addendum April 2021
CHAPTER SIX – ENVIRONMENTAL IMPACT ANALYSIS
This document is an addendum to the previously adopted Griffin Ranch MND referenced
above. This addendum provides the project specific environmental review pursuant to CEQA
to demonstrate the adequacy of the MND relative to the revised project. As indicated above,
the previous MND identified project-related impacts and proposed mitigation measures
related to air quality, cultural resources, paleontological resources, noise, transportation. The
analysis below discusses the adequacy and applicability of previous mitigation measures to
the revised project. In addition, the analysis below addresses whether any new or more
severe impacts would result from the project revisions and whether any additional mitigation
measures beyond those previously identified in the MND would be required.
I. Aesthetics
Griffin Ranch Project MND
The 2005 MND identified no significant impacts related to aesthetics. According to the MND,
the previous project would include single family homes of up to two stories in height. The
size of the lots (from 12,000 to 40,000 square feet) and the limitation of single-story
development within 150 feet of either Madison Street or Avenue 54 will limit the potential
aesthetic impacts associated with the project. The MND also stated that the residential, low
intensity character of the project, and the enhanced parkways and trails provided on the
perimeter of the site, would serve to limit visual impacts associated with the project site. The
MND concluded that the overall impacts associated with the development of the site were
expected to be less than significant.
The MND also stated that there are no rock outcroppings or other significant resources on
the site, therefore impacts associated with scenic resources were expected to be
insignificant. Regarding project-related lighting, the MND concluded that construction of the
site will increase light generation, compared to the previous light generated from the
agricultural uses onsite. Additionally, the City regulates lighting levels and does not allow
lighting to spill over into adjacent properties. Further, residential lighting is generally limited,
and of low intensity. Therefore, the MND concluded that the impacts of the project related to
light would be less that significant, and no mitigation measures were required.
Revised Project
Similar to the 2005 MND, the revised project would not affect scenic vistas in the area. The
surrounding area is largely developed with single family residential lots. The revised project
would develop single family residential dwelling units similar in design, scale, and mass to
the existing residential structures. Since the revised project proposes residential homes in a
neighborhood planned for residential lots, development of the revised project would result in
less than significant impacts to scenic vistas, similar to the previous project.
Similar to the prior MND, the revised project would be required to comply with design
features, landscaping, and lighting requirements established in the Griffin Ranch Specific
Plan and City’s zoning ordinance. Additional review from the City’s Planning Commission or
architectural review may be required for the revised project to ensure a high-quality design
project that is consistent with the Specific Plan and City goals. Therefore, the revised
City of La Quinta Page 16
Draft Addendum October 2021
project’s impacts to the visual character of the area would be the same as the previous
project, and less than significant.
Currently, the residential homes in the Griffin Ranch property consists of low-intensity,
downward-oriented lights typical of residential neighborhoods. The lights proposed for the
revised project would consist of lighting similar to the existing Griffin Ranch property, and
consistent with Section 9.100.150 of the La Quinta Municipal Code. The revised project will
not include exterior building materials that would emit significant amounts of glare. Similar to
light, the revised project will include similar building materials to the existing residential units
in Griffin Ranch for consistency. Therefore, the revised project’s impact to light and glare
would result in less than significant impacts, similar to the previous project.
As previously determined, rock outcroppings or other significant resources do not exist on
the project site. Additionally, the project site is not located in proximity to a state scenic
highway, therefore, the revised project would not impact scenic resources adjacent to or
within close proximity to state scenic highways. Residential structures located within 150 feet
of Avenue 54 would be limited to one-story to reduce the potential aesthetic impacts
associated with the project to motorists and pedestrians travelling along these roadways.
Therefore, impacts would be less than significant, similar to the MND.
The revised project would result in equal impacts to aesthetics compared to the previous
project. As concluded in the Griffin Ranch MND and above, both projects would result in no
impacts or less than significant impacts to aesthetic resources. The revised project does not
propose substantial changes to the project which will require major revisions of the previous
MND or substantial changes with respect to the circumstances under which the project is
undertaken that would require major revisions to the previous MND. Additionally, new
substantially important information that was not included in the MND is not proposed in the
revised project. Therefore, following Section 15162 of the CEQA Guidelines, the revised
project is not required to prepare a subsequent MND.
II. Agricultural Resources
Griffin Ranch Project MND
The MND concluded that the previous project would result in no significant impacts related
to agricultural and forest/timberland resources. According to the MND, the Griffin Ranch site
is located adjacent to single family residential developments and golf course uses. Per the
MND, approximately 40 acres of the Griffin Ranch SP area, as well as lands to the east, were
used for agriculture. However, the MND stated that the Griffin Ranch area is located in a
rapidly urbanizing area of the City and is not under Williamson Act contract. Therefore, the
MND concluded that the development of Griffin Ranch (resulting in the loss of approximately
40 acres of agricultural land) would not be significant.
It was determined that the previous project would not prevent the continued use in agriculture
of lands to the east. However, the City’s General Plan land use designation for the Griffin
Ranch area and surrounding properties includes residential developments of varying sizes.
Therefore, the MND concluded that the project would not result in impacts to agricultural
resources.
Revised Project
City of La Quinta Page 17
Draft Addendum October 2021
The revised project would not change the existing land use or zoning of the property. The
project site does not include any active agricultural uses or agricultural resources, and is not
adjacent to such uses, and is not zoned or designated for agricultural uses. The Griffin Ranch
SP area has been partially developed with residential units, while most of the vacant lots
within the SP area have been disturbed and graded. Thus, the revised project would not
result in impacts to agricultural resources, similar to the MND.
The revised project would result in equal impacts to agricultural resources compared to the
previous project. As concluded in the Griffin Ranch MND and above, both projects would
result in no impacts to agriculture. The revised project does not propose substantial changes
to the project which will require major revisions of the previous MND or substantial changes
with respect to the circumstances under which the project is undertaken that would require
major revisions to the previous MND. Additionally, new substantially important information
that was not included in the MND is not proposed in the revised project. Therefore, following
Section 15162 of the CEQA Guidelines, the revised project is not required to prepare a
subsequent MND.
III. Air Quality
Griffin Ranch Project MND
For reference purposes, the Griffin Ranch MND air quality analysis based its findings
primarily on the “Griffin Ranch Specific Plan and Vesting Tentative Map 32879 Air Quality
and Noise Impact Study”, completed in September of 2004. Under this project scope, the
prior MND found that the residential project would result in no impacts regarding the exposure
of sensitive receptors to substantial pollutant concentrations and regarding objectionable
odors affecting a substantial number of people. The prior MND also determined that the
project would result in less than significant impacts regarding conflicts with the applicable air
quality plan and regarding a cumulatively considerable net increase of any criteria pollutant
for which the project region is non-attainment. It was also determined that project would not
exceed any SCAQMD thresholds of significance for operational emissions. However, the
short-term grading and construction activities were expected to potentially exceed the
emissions thresholds for reactive organic gases (ROG) and nitrogen oxides (NOx). As a
result, construction-related mitigation was formulated to adequately reduce ROG and NOx
emissions levels during construction, including the phasing of grading activity and
compliance with the applicable SCAMQD rules pertaining to dust control and volatile organic
compound limits in architectural coatings. Such mitigation was deemed to result in less than
significant impacts.
Following project and MND approval, clearing and grading operations were completed in
2005. Perimeter walls and on-site infrastructure were also initially completed, while home
construction continued to occur in phases. Therefore, the prior mitigation referenced in the
adopted MND is deemed complete.
Revised Project
Since the prior environmental review, the project setting has not incurred any substantial
change in circumstances deemed inconsistent with the project’s planned residential uses
taking place in multiple construction phases. The current analysis applies to an area of
approximately area of 24.93 acres corresponding to Tentative Tract Map No. 38083 (TTM
City of La Quinta Page 18
Draft Addendum October 2021
No. 38083), which is located within Tract Map No. 32879. In its current condition, the TTM
No. 38083 area consists of rough-graded lots with installed back-bone utilities and partially
constructed private streets. The site is partially surrounded by solid walls corresponding to
neighboring constructed homes within Griffin Ranch and the perimeter wall associated with
Merv Griffin Estate (not a part). The current map conditions allocate 20 single-family
residential lots.
Since the prior MND, the regulatory framework and air quality standards have undergone
updates, including those reflected in the adopted Air Quality Management Plan (2016 AQMP)
currently applicable to the entire SCAMQD jurisdiction. However, the SCAQMD construction
and operational thresholds, to which the prior project was compared, have not changed.
The project region is continuing to implement SIPs toward establishing attainment for PM10
(particulate matter with an aerodynamic diameter of 10 microns or less) and Ozone. Those
attainment updates are summarized as follows:
Regarding PM10, on February 25, 2010, the ARB approved the 2010 Coachella Valley PM10
Maintenance Plan and transmitted it to the U.S. EPA for approval. With the recent data being
collected at the Coachella Valley monitoring stations, consideration of high-wind exceptional
events, and submittal of a PM10 Re-designation Request and Maintenance Plan, a re-
designation to attainment status of the PM10 NAAQS is deemed feasible in the near future
according to the 2016 AQMP. As a standard requirement, the remaining construction
activities for project buildout would be subject to SCAMQD Rules 403 and 403.1, as well as
La Quinta’s Fugitive Dust Control requirements (Chapter 6.16) aimed at addressing the
PM10 concerns for the region. The required measures are designed to prevent sediment
track-out onto public roads, prevent visible dust emissions from exceeding a 20-percent
opacity, and prevent visible dust emissions from extending more than 100 feet (vertically or
horizontally from the origin of a source) or crossing any property line. The proposed project
would not be precluded from the citywide dust control requirements during construction and
therefore would continue to work toward preventing emissions impacts to nearby residential
uses through the proper project site screening, track-out controls, and soil stabilization. After
project completion, permanent site stabilization through residential construction would
eliminate the potential source of fugitive dust.
Regarding ozone, SCAQMD is continuing to implement an updated strategy to comply with
the ozone standard (1997 8-hour standard), for which there is a target attainment date of
June 15, 2024. SCAQMD has acknowledged that the largest ozone contributors to the
Coachella Valley are not sources within the region, but rather the ozone and ozone
precursors transported to the Coachella Valley from the upwind South Coast Air Basin
(SCAB). SCAQMD deems that local sources of air pollution generated in the Coachella
Valley have a limited impact on ozone levels compared to the transported sources generated
in SCAB. The current analysis described below will calculate potential ozone precursor
emissions to compare against the established standards.
TTM No. 38083 proposes to subdivide 20 existing one-acre residential lots into 37 half-acre
lots through the Tentative Tract Map process. The project footprint of approximately 24.93
acres occurs completely within the Griffin Ranch residential community. To perform and
support the current analysis, the most current version of California Emissions Estimator
Model (CalEEMod Version 2020.4.0) was used to calculate the project-related construction
and operational emissions of criteria air pollutants and greenhouse gases. CalEEMod was
developed for the California Air Pollution Control Officers Association (CAPCOA) in
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collaboration with the California Air Districts (including SCAMQD) as a statewide land use
emissions computer model. For comparative analysis, the software model was run
respectively for construction and operation of the currently mapped condition of 20 residential
lots and for the proposed condition of 37 lots in the same area and setting. The model input
also assumed construction activities associated with buildout of the private streets and
designation of open space areas per the TTM. The emissions calculations for both
development scenarios are compared against the most current SCAMQD Air Quality
Significance Thresholds below.
Table III-1
Short Term Air Pollutant Emissions
Associated with Construction 20 Lots and Associated Improvements
(Pounds/Day)
ROG/VOC NOx CO SO2 PM10 PM2.5
Max Emissions Resulting from
Site Preparation, Grading,
Building Construction, Paving,
and Architectural Coating
14.7793
38.8842
29.6608
0.0636
8.2541
4.8668
SCAQMD Threshold 75 100 550 150 150 55
Threshold Exceeded No No No No No No
Note: CalEEMod does not directly calculate ozone (O3) emissions. Instead, the emissions associated with ozone
precursors are calculated. VOC and ROGs are summed in the CalEEMod report under the header ROG. The PM10 and
PM2.5 emissions are based on the CalEEMod mitigated results due to the local standard requirement to implement
SCAQMD Rule 403 and 403.1 to control fugitive dust.
Table III-2
Short Term Air Pollutant Emissions
Associated with Construction 37 Lots and Associated Improvements
(Pounds/Day)
ROG/VOC NOx CO SO2 PM10 PM2.5
Max Emissions Resulting from
Site Preparation, Grading,
Building Construction, Paving,
and Architectural Coating
24.3560
38.8842
29.6608
0.0636
8.1755
4.8475
SCAQMD Threshold 75 100 550 150 150 55
Threshold Exceeded No No No No No No
Note: CalEEMod does not directly calculate ozone (O3) emissions. Instead, the emissions associated with ozone
precursors are calculated. VOC and ROGs are summed in the CalEEMod report under the header ROG. The PM10 and
PM2.5 emissions are based on the CalEEMod mitigated results due to the local standard requirement to implement
SCAQMD Rule 403 and 403.1 to control fugitive dust.
As demonstrated in tables III-1 and III-2 above for the 20- and 37-lot scenario, short-term
construction emission levels resulting from site preparation, grading, building construction,
paving and architectural coating are not expected to exceed the reginal thresholds of
significance established by SCAQMD for criteria air pollutants, including NOx and ROG/VOC
as the ozone pre-cursors. Compliance with SCAMQD Rule 403/403.1 and Municipal Code
Chapter 6.16 is factored in to calculate the PM10 and PM2.5 emissions. Implementation of
the proposed 37-lot scenario would result in relatively higher short-term emission levels
compared to the 20-lot scenario, but neither would reach or exceed any of the established
thresholds.
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Table III-3
Long Term Operational Air Pollutant Emissions
Associated With Development of the Project (Unmitigated)
(Pounds/Day)
Emission Source ROG/VOC NOx CO SO2 PM10 PM2.5
Total Area
Sources, Energy
Use, Mobile
Sources
2.9813
1.0303
8.8553
0.0188
1.3878
0.7262
SCAQMD
Threshold 75 100 550 150 150 55
Threshold
Exceeded No No No No No No
Note: CalEEMod does not directly calculate ozone (O3) emissions. Instead, the emissions associated
with ozone precursors are calculated. VOC and ROGs are summed in the CalEEMod report under the
header ROG.
Table III-4
Long Term Operational Air Pollutant Emissions
Associated With Development of the Project (Unmitigated)
(Pounds/Day)
Emission Source ROG/VOC NOx CO SO2 PM10 PM2.5
Total Area
Sources, Energy
Use, Mobile
Sources
5.4296
1.9061
16.3818
0.0347
2.5675
1.3434
SCAQMD
Threshold 75 100 550 150 150 55
Threshold
Exceeded No No No No No No
Note: CalEEMod does not directly calculate ozone (O3) emissions. Instead, the emissions associated
with ozone precursors are calculated. VOC and ROGs are summed in the CalEEMod report under the
header ROG.
As demonstrated in tables III-3 and III-4 above for the 20- and 37-lot scenario, long-term
operational air pollutant emissions that would occur during the life of the project would not
exceed any of the SCAQMD air quality thresholds. Operation of proposed 37-lot scenario
would result in higher short-term emission levels compared to the 20-lot scenario, but neither
would reach or exceed any of the thresholds.
In summary, due to the compliant emission levels, the proposed project would not interfere
with the City or region’s ability to comply with the most current air quality plans including the
2016 AQMP, CVSIP for PM10, and the ozone level attainment efforts. Therefore, the revised
project would result in less than significant impacts to the region’s air quality standards,
similar to the previous project. Moreover, the project’s short-term construction and long-term
operational emissions would not exceed the established thresholds for criteria air pollutant
emissions; therefore, the revised project will result in less than significant impacts to criteria
air pollutant emissions. Pertaining to the obstruction of an applicable air quality plan, less
than significant impacts are anticipated, similar to the previous project. Similar to the previous
project, the revised project would result in no impacts regarding the generation of odors,
since it proposes the development of residential lots.
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The revised project does not propose substantial changes to the project which will require
major revisions of the previous MND or substantial changes with respect to the
circumstances under which the project is undertaken that would require major revisions to
the previous MND. Additionally, new substantially important information that was not included
in the MND is not proposed in the revised project. Therefore, following Section 15162 of the
CEQA Guidelines, the revised project is not required to prepare a subsequent MND.
IV. Biological Resources
Griffin Ranch Project MND
The MND evaluated potential biological resource impacts associated with the development
of the 199-acre project site. James W. Cornett, Ecological Consultants conducted a search
of available literature and conducted a general biological survey of the project property to
identify special status plants, wildlife, and habitats known to occur in the vicinity of the project
site. Records, collections and/or staff of the University of California at Riverside Herbarium,
the Living Desert, the Boyd Deep Canyon Desert Research Station, and Natural Diversity
Database were consulted.
The MND states the biological study analyzed the entire site, with a particular focus on the
60-acres located in the northwestern and southeastern corners of the site which was
undisturbed vacant land. No listed species were found on the project site and surveys for
the desert tortoise and burrowing owl were negative. The prior analysis concludes that that
no riparian habitat or wetland habitat was identified on the project site and that the site does
not occur within the boundary of the Coachella Valley Fringed-toed lizard. Therefore, impacts
to biological resources were found to be less than significant.
Revised Project
Similar to the MND, the revised project would result in less than significant impacts
associated with sensitive habitat, riparian habitat, or other sensitive natural community as
none of these resources were identified on the project site. The site has been heavily
impacted by grading and development and surrounded by single family residential homes.
Additionally, the 2004 biological report also found no impacts to any native resident or
migratory fish or wildlife species, or with established native resident or migratory wildlife
corridors or nursery sites. No conflicts with local policies or ordinances protecting biological
resources such as a tree preservation policy or ordinance would occur under the revised
project. Less than significant impacts are anticipated.
The revised project would result in equal impacts to biological resources compared to the
previous project. As concluded in the Griffin Ranch MND and above, both projects would
result in no impacts or less than significant impacts to biological resources. The revised
project does not propose substantial changes to the project which will require major revisions
of the previous MND or substantial changes with respect to the circumstances under which
the project is undertaken that would require major revisions to the previous MND.
Additionally, new substantially important information that was not included in the MND is not
proposed in the revised project. Therefore, following Section 15162 of the CEQA Guidelines,
the revised project is not required to prepare a subsequent MND.
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V. Cultural and Tribal Cultural Resources
Griffin Ranch Project MND
The MND evaluated potential cultural resource impacts associated with the development of
the 199-acre project site. Phase I and Phase II cultural resources studied were completed
for the proposed project. The studies identified and recorded six potentially significant cultural
resource sites within the project area. These sites consisted of ceramic scatters and
groundstone fragments. The archaeologist concluded that the six sites potential significance
has been mitigated by the collection of materials, the laboratory analysis performed. The
site lies within the City’s General Plan map boundary for ancient Lake Cahuilla and mitigation
has been adopted to assure potential impacts are mitigated. The following mitigation was
established for the project:
1. Local tribes shall be contacted in writing for comments prior to issuance of the first
grubbing, earth moving or grading permit. The applicant shall provide the Community
Development Department with all written responses received within one month prior
to issuance of any grading permit. One Native American monitor shall be required
should the tribes request it.
2. The site shall be monitored on and off-site trenching and rough grading by qualified
archaeological and paleontological monitors. Proof of retention of monitors shall be
submitted to the City prior to issuance of the first earth-moving or clearing permit.
3. The final report on monitoring shall be submitted to the Community Development
Department prior to the issuance of the first production home permit for the project.
4. Collected archaeological resources shall be properly packaged for long term curation,
in polyethylene self-seal bags, vials, or film cans as appropriate, all within acid free,
standard size, comprehensively labeled archive boxes and delivered to the City prior
to issuance of first Certificate of Occupancy for the property. Materials shall be
accompanied by descriptive catalogue, field notes and records, primary research
data, and the original graphics.
5. Results of the final artifact analysis and site interpretation shall be submitted to the
Community Development Department for review by the Historic Preservation
Commission prior to issuance of the first grading, clearing or grubbing permit.
6. A paleontological resources survey shall be conducted on the project site prior to the
initiation of ant ground disturbance. The study shall be conducted in conformance
with the City’s standard such a study and shall be submitted for review and approval.
The MND concludes that potential impacts to cultural, tribal cultural, and paleontological
resources have been mitigated to a less than significant.
Revised Project
The revised project proposes a Tentative Tract Map to allow for the subdivision of 20 existing
1-acre lots into 37 half acre lots within the same footprint. The 20 lots are currently graded
with improvements. The revised project would not require construction beyond what was
anticipated in the MND. While the overall lot count is proposed to change, no additional
grading beyond what was anticipated in the MND would occur. Similar to the MND, the
revised project would result in no impacts to historic resources, as defined in Section 15064.5
of the CEQA Guidelines. This includes any object, structure, site, area, place, record, or
manuscript which a lead agency determines to be historically significant.
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As discussed in the MND, there is the potential for grading to impact significant
archaeological resources. Therefore, if grading or trenching of the revised project exceeds
the depth of the previous onsite rough grading activities, the revised project would be
required to implement mitigation measure 1 through 6 as required in the MND. This would
ensure impacts to cultural, tribal cultural, and paleontological resources would be less than
significant with mitigation, the same that was identified in the MND.
The revised project would result in equal impacts to cultural and tribal cultural resources
compared to the previous project. As concluded in the Griffin Ranch MND and above, both
projects would result in less than significant impacts with mitigation to cultural and tribal
cultural resources. The revised project does not propose substantial changes to the project
which will require major revisions of the previous MND or substantial changes with respect
to the circumstances under which the project is undertaken that would require major revisions
to the previous MND. Additionally, new substantially important information that was not
included in the MND is not proposed in the revised project. Therefore, following Section
15162 of the CEQA Guidelines, the revised project is not required to prepare a subsequent
MND.
VI. Energy Resources
Griffin Ranch Project MND
The Griffin Ranch Project MND was prepared prior to the requirement of energy resources
analysis in the CEQA Appendix G Checklist. As a result, this topic of environmental review
was not a part of the adopted project and is included herein for informational purposes only.
Revised Project
Since the prior MND adoption, the topic of energy resources has been added to the CEQA
Appendix G Checklist with the respective thresholds of significance primarily centered
around the quantification of project-related energy consumption related to the wasteful use
of energy and the project’s compliance with local, regional and state policies regarding
energy. As a result, this supplemental analysis also focuses on the energy consumption
quantities and the project’s compliance with relevant policies and regulations.
The revised project would not require grading or construction beyond the project area
analyzed in the MND. The revised project proposes the subdivision of 20, 1-acre lots, to 37
half-acre lots on approximately 25 acres. Currently, the site is graded and includes
infrastructure developed previously. Although the project proposes to increase the number
of lots on the approximately 25-acre area, no additional grading beyond what as anticipated
in the MND would occur. The number of dwelling units increased by 17 (20 to 37 dwelling
units), which is compliant with the existing land use and zoning designations. The operation
of the site would still consist of activities associated with residential communities. Associated
improvements also include paved drive aisles and landscaping.
To perform and support the current analysis, CalEEMod Version 2020.4.0 was used to
calculate the project-related construction and operational energy consumption. The project
is expected to consume energy in the form of electricity, natural gas, and petroleum during
construction and operation. The software model was run respectively for construction and
operation of the currently mapped condition of 20 residential lots and for the proposed
condition of 37 lots in the same area and setting. The model input also assumed construction
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Draft Addendum October 2021
activities associated with buildout of the private streets and designation of open space areas
per the TTM. CalEEMod emission reports for the 20-lot project is included as Appendix B, C,
and D; while Appendix D, F and G show the CalEEMod emission reports for the revised 37-
lot project.
Construction
It can be concluded that electricity consumed during construction of the project would be
temporary and negligible, while natural gas would not be consumed during construction of
the project. Most energy used during construction would be from petroleum consumption
during the use of heavy construction equipment and construction worker commute. As
previously stated, CalEEMod was utilized to determine how much energy consumption would
occur from the previous project, 20, 1-acre lots, and 37 half-acre lots. Energy consumption
from the construction of the 20-lot project would result in 14,851.5 gallons of gasoline and
66,469.6 gallons of diesel fuel during the project’s construction. In total, the 20-lot project
would consume approximately 81,321.1 gallons of petroleum during construction. This is
indicated in Table VI-1.
Table VI-1 Previous Project
Construction Petroleum Consumption
Petroleum Units Previous Project
(20 lots)
Gasoline Gallons 14,851.5
Diesel Gallons 66,469.6
Total Petroleum Consumption 81,321.1
The revised project proposes to increase the lots on the approximately 25-acre site by 17
lots, for a total of 37 lots. The CalEEMod calculations determined that the project is estimated
to consume approximately 15,666.4 gallons of gasoline and 66,729 gallons of diesel fuel
during project construction. In total, the revised project would consume approximate 82,395.4
gallons of petroleum during construction. This is approximately 1,074.3 gallons more than
the previously 20-lot project. This is indicated in the table below.
Table VI-2 Construction Petroleum Consumption
Petroleum Units Previous Project
(20 lots)
Revised Project
(37 Lots)
Gasoline Gallons 14,851.5 15,666.4
Diesel Gallons 66,469.6 66,729
Total Gallons 81,321.1 82,395.4
Difference (total) 1,074.3 Gallons
The construction equipment utilized for development of the proposed project would include
Tier 3 engines or higher, and will include newer off-road equipment units. Therefore, the
revised project would result in less than significant impacts to energy consumption during
construction of the project.
Operation
The operational energy consumption, via electricity, natural gas and petroleum for the project
City of La Quinta Page 25
Draft Addendum October 2021
site is indicated in the table below. The revised project is proposed to consume approximately
294,692 kWh of electricity per year, which is approximately 135,399 kWh more electricity
consumed than the previous project due to the increased unit number. However, the La
Quinta General Plan Environmental Impact Report (LQGP EIR) predicts that buildout of
residential uses in the General Plan, including the proposed project site, will result in
electrical consumption of 530,867,194 kWh/year. The revised 37-lot project is anticipated to
consume approximately 294,692 kWh/year, which is approximately 0.055 percent of the
City’s electrical consumption at total build-out. According to the LQGP EIR, at General Plan
build-out, residential units will use approximately 953,444,843.9 kBTU of natural gas per
year. The 37-lot project is anticipated to consume approximately 1,046,620 kBTU/year, which
is approximately 0.11 percent of the City’s natural gas consumption at total build-out. Finally,
California consumes approximately 26 billion gallons of petroleum per year. The 37-lot
project is anticipated to consume approximately 29,199.7 gallons of petroleum per year,
which is approximately 0.0001 percent of the California’s estimated consumption of
petroleum a year. Therefore, operation of the revised project is not anticipated to use
excessive amounts of electricity, natural gas, and petroleum, and impacts were expected to
be less than significant. In this context, the revised project would not result in the wasteful,
inefficient, or unnecessary consumption of energy resources during construction or operation
of the project, similar to the previous project.
Table VI-3 Operational Energy Consumption
Energy Previous Project
(20 lots)
Revised Project
(37 Lots)
Electricity (kWh) 159,293 294,692
Natural Gas (kBTU/yr) 565,739 1,046,620
Gasoline (gallons) 14,739.9 27,268.9
Diesel (gallons) 1,043.7 1,930.8
The revised project will comply with state-implemented building standards such as those
outlined in Title 20 and Title 24 of the California Code of Regulations. Energy efficient
appliances will be utilized during project operation. Project-related energy consumption and
VMTs created by the project are not anticipated to be substantial. Construction activities
would require the use of equipment that would be more energy intensive that is used for
comparable activities. However, construction equipment will comply with the Tier 3 program
engines or higher, therefore would be newer off-road equipment units. Therefore, the revised
project would not conflict or obstruct a state or local plan for renewable energy or energy
efficiency.
The revised project would result in more energy consumed compared to the 20 lots approved
and analyzed in the previous project, due to the increase of 17 additional lots. However, as
concluded above, both the previous project and revised project would result in less than
significant impacts to energy resources. Major revisions to the MND are not required due to
changes to the project as there have been no substantial changes in circumstances requiring
major MND revisions; and there is no new information showing greater significant effects
than disclosed in the previous MND.
VII. Geology and Soils
Griffin Ranch Project MND
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Draft Addendum October 2021
According to the MND, a project-specific geotechnical analysis was completed for the project.
The geotechnical anlaysis determined that the project site is not located within an Alquist-
Priolo earthquake study zone. The analysis also determined that development of a residential
project on the property is feasible, with the implementation of standards already in place at
the City. The MND states that groundwater was not found at a depth of up to 50 feet, based
on boring tests provided in the geotechnical analysis. Therefore, the MND stated that the site
is not subject to liquefaction. Additionally, the site is not located adjacent to rock outcroppings
or hillsides, and is therefore, not subject to landslides or rockfalls. The site is not located on
expansive soils, and the Griffin Ranch SP project proposed to connect to Coachella Valley’s
Water District’s (CVWD) sewer infrastructure and therefore would not require septic tanks.
With the foregoing, the MND concluded that impacts regarding geology and soils at the site
would be less than significant.
Revised Project
The revised project would not require grading or construction beyond what was anticipated
in the MND. As such, no new or increased impacts related to geology and soils would occur.
Compliance with the most current State building codes and regulations would ensure grading
and development of the site would reduce the impacts associated with geology and soils to
less than significant, as concluded in the MND.
The project shall comply with the most current seismic design coefficients and ground motion
parameters and all applicable provisions of the California Building Code (CBC). Additionally,
the proposed buildings shall be required to be constructed in a manner that reduced the risk
of seismic hazards (Title 24, California Code of Regulations). Remedial grading and
construction would reduce exposure of people or structures to adverse effects of seismic
hazards to the greatest extent possible. All grading and construction plans will be reviewed
by the City for approval. This will ensure that the foundation soils can support the proposed
project. The revised project would result in equal impacts to seismic-related hazards.
However, as concluded in the Griffin Ranch MND and above, project-related impacts to
seismic-related hazards would be less than significant.
Additionally, the implementation of a Fugitive Dust Control Plan (as required by Chapter 6.16
in the City’s Municipal Code) and a Storm Water Pollution Prevention Plan (SWPPP) during
construction activities to reduce impacts of soil erosion at the site. Grading plans will be
developed in compliance with the City’s standards and will be reviewed by the City. The
revised project would result in similar impacts regarding project-related erosion compared to
the previous project since they both propose development on the site. However, with the
compliance of City standards, the revised project would ensure erosion at the site would be
less than significant.
As determined in the Griffin Ranch MND, the project is not located on expansive soils, and
the site will connect to CVWD sewer systems; therefore, septic tanks are not required. The
revised project would result in similar impacts compared to the previous project. Both the
previous project and revised project would result in no impacts.
Overall, the revised project would result in similar impacts to geology and soils compared to
the previous project. As concluded in the Griffin Ranch MND and above, both projects would
result in no impacts or less than significant impacts. The revised project does not propose
substantial changes to the project which will require major revisions of the previous MND or
City of La Quinta Page 27
Draft Addendum October 2021
substantial changes with respect to the circumstances under which the project is undertaken
that would require major revisions to the previous MND. Additionally, new substantially
important information that was not included in the MND is not proposed in the revised project.
Therefore, following Section 15162 of the CEQA Guidelines, the revised project is not
required to prepare a subsequent MND.
VIII. Greenhouse Gas Emissions
Griffin Ranch Project MND
The previous MND was prepared prior to the requirement of greenhouse gas (GHG)
emissions analysis in the CEQA Appendix G Checklist. As a result, this topic of
environmental review was not a part of the adopted project and is included herein for
information purposes only.
Revised Project
Since the prior MND adoption, the topic of GHG emissions has been added to the CEQA
Appendix G Checklist with the respective thresholds of significance primarily centered
around the quantification of emission for comparison against the regionally applicable
numeric standards. As a result, this supplemental analysis also focuses on the emissions
quantities. To perform and support the current analysis, CalEEMod Version 2020.4.0 was
used to calculate the project-related construction and operational GHG emissions. The
software model was run respectively for construction and operation of the currently mapped
condition of 20 residential lots and for the proposed condition of 37 lots in the same area and
setting. The model input also assumed construction activities associated with buildout of the
private streets and designation of open space areas per the TTM. CalEEMod emission
reports for the 20-lot project is included as Appendix B, C, and D; while Appendix D, F and
G show the CalEEMod emission reports for the revised 37-lot project.
The currently applicable GHG thresholds for local lead agency consideration are referenced
from the SCAQMD Working Group Threshold supporting documentation, which establishes
an interim tiered approach. Under this guidance, a screening threshold of 3,000 metric tons
of carbon dioxide equivalent (MTCO2e) per year has been an acceptable approach for this
project. The GHG emissions estimates resulting from CalEEMod are displayed below in
Table VIII-1.
Table VIII-1
Total Project Greenhouse Gas Emissions
Associated with 20 Lots and Associated
Improvements
Emission Source
Emissions
Metric Tons of Carbon
Dioxide Equivalent (MTCO2e)
per year
Total MTCO2e
Annual Construction
Emissions Amortized Over 30 Years 15.6645
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Area, Energy, Mobile Sources,
Waste, and Water Usage 215.8178
Total MTCO2e (All Sources) 231.4823
Screening Threshold 3,000 MTCO2e
Threshold Exceeded? NO
Table VIII-2
Total Project Greenhouse Gas Emissions
Associated with 37 Lots and Associated
Improvements
Emission Source
Emissions
Metric Tons of Carbon
Dioxide Equivalent (MTCO2e)
per year
Total MTCO2e
Annual Construction
Emissions Amortized Over 30 Years 15.8405
Area, Energy, Mobile Sources,
Waste, and Water Usage 399.4277
Total MTCO2e (All Sources) 415.2682
Screening Threshold 3,000 MTCO2e
Threshold Exceeded? NO
As summarized above, development of 20 lots, as currently mapped, would result in a total
of 231.4823 MTCO2e per year from construction, area, energy, mobile sources, waste, and
water usage sources. By comparison, the proposed development of 37 lots would result in
415.2682 MTCO2e per year from the same sources. Although the operation of 37 lots would
result in higher GHG emissions, these would still occur considerably below the established
thresholds. As a result, neither the 20- or 37-lot development scenario would result in
potentially significant impacts. Having been evaluated against the regionally accepted
thresholds, which are part of the State’s regulations aimed at addressing climate change, the
project is not expected to interfere with the plans, policies, or regulations adopted for the
purpose of reducing the emissions of greenhouse gases. Less than significant impacts are
anticipated.
IX. Hazards and Hazardous Materials
Griffin Ranch Project MND
According to the MND, the Griffin Ranch project would not create a significant impact on or
from hazardous materials, since it is proposing single family homes. The City’s solid waste
contractor implements household hazardous waste programs which assure that such
materials are disposed of in a safe manner. Therefore, the MND concluded that the project
would not result in impacts.
Revised Project
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Draft Addendum October 2021
The revised project would not require grading or construction beyond what was anticipated
in the MND and would not change the allowable uses on the property from the previous
project. As such, no new or more impacts related to hazards or hazardous materials would
occur. As discussed in the MND, hazardous materials are not typically associated with
residential land uses. Minor cleaning products and the occasional use of pesticides and
herbicides for landscape maintenance would be the extent of materials used. Therefore,
similar to the MND, the revised project would result in similar impacts compared to the
previous project. Both projects would not result in significant impacts.
Construction of the project was expected to involve the temporary management and use of
potentially hazardous substances and petroleum products. The nature and quantities of
these products would be limited to what is necessary to carry out construction of the project.
Some of these materials would be transported to the site periodically by vehicle and would
be stored in designated controlled areas on a short-term basis. When handled properly by
trained individuals and consistent with the manufacturer’s instructions and industry
standards, the risk involved with handling these materials would be considerably reduced.
To prevent a threat to the environment during construction, the management of potentially
hazardous materials and other potential pollutant sources would be regulated through the
implementation of control measures required in the Storm Water Pollution Prevention Plan
(SWPPP) for the project. The SWPPP requires a list of potential pollutant sources and the
identification of construction areas where additional control measures are necessary to
prevent pollutants from being discharged. The measures outlined in SWPPP documents
require physical improvements and procedures to prevent impacts of pollutants and
hazardous materials to workers and the environment during construction. Compliance with
industry and manufacturer standards regarding the handling, use, delivery, and storage of
hazardous materials would ensure impacts of accidental release or the handling of
hazardous materials during construction and operation of the site would be less than
significant. Development of the revised project would result in similar impacts to the use of
hazardous materials compared to the previous project since they both proposed the
development of residential units. With the implementation of the SWPPP, impacts would not
be significant.
In addition, the project site is not located within one-quarter mile of a school. Therefore,
impacts would be less than significant. The project is not within an airport land use plan, or
within two miles of an airport or airstrip. Therefore, the revised project would result in similar
impacts to schools or airports compared to the previous project. As determined in the Griffin
Ranch MND and above, both projects would result in no impacts.
Implementation of the revised project would not physically interfere with an adopted
emergency response plan or emergency evacuation plan. The revised project occurs within
a partially developed residential community. Access to the site includes paved roads with fire
truck accessible drive aisles to ensure adequate emergency response access on-site. The
proposed design would be subject to a standard review process by the Riverside County Fire
Department to ensure that the site-specific emergency access, water pressure, and other
pertinent criteria are met by the revised project. Impacts will not be significant. The revised
project would result in similar impacts regarding emergency response and evacuation plans
compared to the previous project.
The project is located outside of areas designed as Very High/High/Moderate Fire Hazard
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Severity Zone (FHSZ) for State and Federal Responsibility Areas, and Very High FHSZ for
Local Responsibility Areas. The project is not located near wildlands and impacts were
determined to be less than significant. The revised project will not result in additional grading
or construction beyond the boundaries of the property analyzed in the MND. Therefore,
impacts of wildfires would not be significant, similar to the MND. Both projects would result
in similar impacts to exposing people or structures to a risk involving wildland fires. No
impacts would occur due to the project’s location outside of a Very High FHSZ.
Overall, the revised project would result in equal impacts of hazards and hazardous materials
compared to the previous project. As concluded in the Griffin Ranch MND and above, both
projects would result in no impacts or less than significant impacts.. The revised project does
not propose substantial changes to the project which will require major revisions of the
previous MND or substantial changes with respect to the circumstances under which the
project is undertaken that would require major revisions to the previous MND. Additionally,
new substantially important information that was not included in the MND is not proposed in
the revised project. Therefore, following Section 15162 of the CEQA Guidelines, the revised
project is not required to prepare a subsequent MND.
X. Hydrology and Water Quality
Griffin Ranch Project MND
The Griffin Ranch MND evaluated the residential project against the hydrology and water
quality thresholds applicable under CEQA at the time of preparation. The prior MND analysis
cited various regulatory requirements and project-specific engineering design approvals
necessary to adhere to the local hydrology and surface water quality standards, as well as
mandates under the National Pollution Discharge Elimination System (NPDES) framework
(Section 402 of the Clean Water Act).
Specifically, the prior MND determined that the project proponent would be required to obtain
coverage under the applicable NPDES permits and comply with the City’s requirement to
retain stormwater runoff from the controlling 100-year storm event on-site. The site design
included a private storm drain system with dual use open space and retention basins
designed to accept infiltrate project runoff from the 100-year storm event and in doing so,
also provide flood protection to the residential structures. Such storm drain system would be
privately funded and maintained. Therefore, the prior MND found that the project would not
generate runoff which would exceed the capacity of existing or planned stormwater drainage
systems or provide substantial sources of pollution. The prior MND also determined that the
project would not place housing or structures within a 100-year flood hazard area and would
not impede or redirect flood flows. These findings of no significant impact were supported by
the proposed storm drain design with retention basins.
The prior MND determined less than significant impacts regarding water quality standards or
waste discharge requirements, groundwater supplies, existing drainage patterns, erosion,
siltation, and flooding conditions. These findings of less than significant impacts were also
supported by the evaluation of the proposed storm drain design aimed at complying with the
hydrology and water quality standards, as well as the water efficiency measures across the
project.
Revised Project
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Since the prior environmental review, the project setting has not incurred any substantial
change in circumstances inconsistent with the project’s phased residential development and
the associated storm drain infrastructure. Storm drain facilities are operational and are
maintained by the homeowner’s association. The Griffin Ranch community is divided into two
on-site hydrologic drainage areas, each served by a retention system (Basin 1 and 2) sized
to collect and infiltrate the tributary runoff resulting from the controlling 100-year storm event.
The combined capacity of the retention facilities is approximately 27.3 acre-feet. A revised
hydrology analysis prepared for the current project estimated that the existing storm drain
system has an available retention capacity of approximately 7.5 acre-feet after accounting
for the developed uses.
TTM No. 38083 involves a net area of 24.93 acres, of which 19.55 acres would consist of
single-family residential lots (Lots 1 through 37), approximately 3.15 acres would consist of
private streets, and 2.23 acres would consist of open space. The project will follow the
approved drainage condition by allowing conveyance into the existing catch basins on
Seattle Slew Way. Stormwater from the western part of the project would be conveyed along
existing storm drain lines to retention Basin 1. For the east part of the project, runoff would
be conveyed along existing storm drain lines to retention Basin 2. It is worth noting that the
drainage pattern followed by the proposed project is similar to the existing drainage condition
associated with the 20-lot allocation. This is due to the previously established grading,
elevations, street design and lot configuration.
The available retention capacity at Griffin Ranch is sufficient to address the City’s hydrologic
retention requirements and the volumetric-based stormwater quality design quantities for the
project area. The runoff volume of 0.25 acre-feet associated with the residential development
of 37 lots would be accommodated by the available retention capacity of 7.75 acre-feet. As
a result, the project will not generate runoff quantities capable of exceeding the storm drain
system. Moreover, the project would not result in stormwater discharge to any publicly
operated storm drain system outside of the Griffin Ranch community. Therefore, the revised
project would result in similar impacts to stormwater runoff compared to the previous project
and impacts for both projects are less than significant.
For the period of construction, a stormwater pollution prevention plan and erosion control
plan must be prepared, filed, and implemented to comply with the State’s most current
Construction General Permit (CGP), Order No. 2009-0009-DWQ, as amended by 2010-
0014-DWQ and 2012-006-DWQ. This regulatory compliance plan will include measures to
ensure that the remaining construction activities prevent surface water quality impacts.
For post-construction (operational) conditions, additional documentation will be required in
the form of a WQMP to comply with the most current standards of the Whitewater River
Region Water Quality Management Plan for Urban Runoff and the Whitewater River
Watershed MS4 Permit. This WQMP will be subject to review and approval by the City prior
to issuance of a grading permit.
The existing on-site stormwater infrastructure will continue to provide adequate capacity to
prevent uncontrolled runoff discharge. There is no aspect of the remaining residential
buildout deviating from the prior analysis, regulatory requirements and the associated
stormwater controls. Therefore, by following regulatory program requirements designed to
specifically prevent hydrologic, stormwater and surface water impairments, the impacts
resulting from the revised project of 37 lots would continue to be less than significant. The
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revised plans would not result in new or greater significance levels than those disclosed in
the previous MND.
Overall, the revised project would result in equal impacts to hydrology and water quality
compared to the previous project. Onsite drainage is controlled by existing stormwater
facilities in the Griffin Ranch property. As concluded in the Griffin Ranch MND and above,
both projects would not result in significant impacts to hydrology and water quality. The
revised project does not propose substantial changes to the project which will require major
revisions of the previous MND or substantial changes with respect to the circumstances
under which the project is undertaken that would require major revisions to the previous
MND. Additionally, new substantially important information that was not included in the MND
is not proposed in the revised project. Therefore, following Section 15162 of the CEQA
Guidelines, the revised project is not required to prepare a subsequent MND.
XI. Land Use and Planning
Griffin Ranch Project MND
The MND concluded that the project site would not divide an established community. At the
time the MND was written, the area surrounding the Griffin Ranch Specific Plan area
consisted of existing low density residential communities. Future low density residential
communities were proposed north of the Griffin Ranch SP site.
The previous project included a General Plan Amendment (GPA) and a Change of Zone
from Very Low Density Residential to Low Density Residential. According to the MND, the
previous project proposed 303 residential units, which is less than the amount that could be
constructed under the Very Low Density Residential category. Therefore, the MND
concluded that the GPA and Change of Zone proposed with the project would not result in
impacts.
Finally, the MND stated that the Griffin Ranch SP area is located outside the boundary of the
mitigation fee for the Coachella Valley Fringe-toed Lizard Habitat Conservation Plan, and the
project would result in no impacts to land use and planning.
Revised Project
As stated throughout this document, the revised project is proposing the subdivision of 20
existing 1-acre residential lots into 37 half-acre lots within the Griffin Ranch SP area. The
revised project would not create any new land use barriers, preclude the development of
surrounding parcels, or otherwise divide or disrupt the physical arrangement of the
surrounding established community, as the areas surrounding the project site are mostly
developed and consist of residential buildings and uses. Therefore, the revised project would
result in similar impacts compared to the previous project. Both projects would not divide an
established community, thus, as determined in the MND and above, no impacts are
anticipated.
The site is currently designated as Low Density Residential land use and zoning. The land
use and zoning designations would not change as a result of implementing the revised
project. The revised project proposes to increase the density of the Tract Map 38083 area,
however, a Specific Plan Amendment is not required based on substantial conformance
through a Director’s Determination. Additionally, the revised project would not consist of
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components that would conflict with any applicable habitat conservation plans or natural
conservation plans, similar to the previous project. The revised project would result in similar
impacts to land use plan, policy or regulations, or conservation plans compared to the
previous project. Both projects would result in no impacts.
No new or more severe impacts associated with land use and planning would occur as a
result of implementing the revised project. The revised project does not propose substantial
changes to the project which will require major revisions of the previous MND or substantial
changes with respect to the circumstances under which the project is undertaken that would
require major revisions to the previous MND. Additionally, new substantially important
information that was not included in the MND is not proposed in the revised project.
Therefore, following Section 15162 of the CEQA Guidelines, the revised project is not
required to prepare a subsequent MND.
XII. Mineral Resources
Griffin Ranch Project MND
The MND concluded that the previous project would result in no impacts to mineral
resources. The MND determined that the project site is designated as MRZ-1, therefore, the
project would not result in the loss of availability of any known mineral resource valuable to
the region or to the residents of the state. No impacts were identified in the previous MND.
Revised Project
Similar to the previous project, under the revised project it would not be feasible to use the
project site for mining operation due to the site’s zoning and land use designation.
Additionally, the site is located within the Griffin Ranch Specific Plan area and is designated
for single family residential homes. Existing residential communities surround the revised
project. The City’s General Plan does not identify the project site as an existing or past
extraction site. Therefore, implementation of the revised project would result in no impacts
related to the loss of local, regional, or state mineral resources, similar to the MND.
Overall, the revised project would result in similar impacts to mineral resources compared to
the previous project. As concluded in the Griffin Ranch MND and above, both projects would
result in no impacts. The revised project does not propose substantial changes to the project
which will require major revisions of the previous MND or substantial changes with respect
to the circumstances under which the project is undertaken that would require major revisions
to the previous MND. Additionally, new substantially important information that was not
included in the MND is not proposed in the revised project. Therefore, following Section
15162 of the CEQA Guidelines, the revised project is not required to prepare a subsequent
MND.
XIII. Noise
Griffin Ranch Project MND
A project-related noise impact analysis was prepared for the previous project to determine
the potential noise impacts associated with the development of the project site. Per the MND,
the project would result in short-term (construction), and long-term (operational) impacts
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related to noise. In particular, the study found that the noise levels associated with vehicular
traffic adjacent to the project site would have the potential to exceed the City’s standards for
residential land uses without mitigation on both Madison and Avenue 54. The MND stated
that on Madison Street, the noise level without mitigation was expected to exceed 75 dBA
CNEL, while on Avenue 54 the noise level was expected to exceed 65 dBA CNEL.
Additionally, the project was expected to generate noise associated with construction on the
project site which would exceed City standards for a short period of time. Therefore, the MND
established the following mitigation measures to reduce project-related noise impacts.
1: Construction on the project site shall occur only during the hours prescribed by the
La Quinta Municipal Code.
2: All construction equipment shall be properly maintained and mufflered, and the
engines shall be equipped with shrouds.
3: Stockpiling and staging areas, as well as servicing and fueling equipment, shall be
located as far away from existing residential structures as possible.
4: A six-foot wall on a one foot berm shall be constructed on Madison Street. A six-foot
wall shall be constructed on Avenue 54. Both walls shall be of solid construction,
without breaks or openings.
5: A final noise analysis shall be completed when final lot layout and pad elevations
have been completed to assure that the wall requirements are sufficient to meet the
City standards.
Therefore, with the implementation of the mitigation measures, impacts associated with noise
were expected to be less than significant. Finally, the MND concluded that the Griffin Ranch
SP area is not located adjacent to an airport or airstrip, and no impacts would occur.
Revised Project
The revised project would not require grading or construction beyond what was anticipated
in the MND, nor would it change the allowed uses within the project site. No additional
grading beyond what was anticipated in the MND would occur. As such, no new or more
impacts related to noise would occur. Impacts would be less than significant, similar to the
MND.
Construction activities associated with the revised project are only permitted within the
construction hours established by the City. During construction, the revised project will be
subject to mitigation measures 1, 2, 3 and 5 (listed above). Mitigation measure 4 is not
applicable to the revised project because the frontages along Madison Street and Avenue
54 have been developed. The revised project is expected to follow common industry
standards that will help limit noise level increases. For example, all construction equipment,
fixed or mobile, should be equipped with properly operating and maintained mufflers and the
engines should be equipped with shrouds. Approved haul routes shall be used to minimize
exposure of sensitive receptors to potential adverse levels from hauling operations. All
construction equipment shall be in proper working order and maintained to reduce backfires.
Similar to the MND, construction and operational noise generated by the revised project is
expected to be less than significant with the implementation of 1, 2, 3 and 5, as established
in the MND.
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The operation of the revised project is the same as the operations analyzed in the MND.
While the revised project would result in an increase in noise levels compared to the existing
partially undeveloped condition, the nature of the residential uses is not expected to result in
the generation of noise levels that would surpass the community noise and land use
compatibility standards.
In regard to noise generated by project traffic, the revised project would not introduce a
substantial amount of additional vehicle travel to the site. The revised project would not
significantly alter on- or off-site noise generation, as the proposed uses would be similar to
the existing uses in the surrounding area and the increase in lot count (additional 17 lots)
would still result in less dwelling units per acre than allowed in the existing Low Density
Residential land use and zoning designation, which allows 2 dwelling units per acre (du/ac).
Similar to the MND, noise levels associated with the revised project would not conflict with
the City’s Noise Ordinance or the General Plan noise standards, resulting in less than
significant impacts. Additionally, the revised project is not located within two miles of a public
airport or public use airport, or within the vicinity of a private airstrip. Therefore, there would
be no impacts.
With the implementation of mitigation measures 1, 2, 3 and 5, the revised project would result
in less than significant impacts.
Overall, the revised project would result in slightly increased impacts to noise compared to
the previous project due to the addition of 17 residential lots. However, impacts from the
revised project would be less than significant with the implementation of the mitigation
measures of the Griffin Ranch MND, as with the previous project.. The revised project does
not propose substantial changes to the project which will require major revisions of the
previous MND or substantial changes with respect to the circumstances under which the
project is undertaken that would require major revisions to the previous MND. Additionally,
new substantially important information that was not included in the MND is not proposed in
the revised project. Therefore, following Section 15162 of the CEQA Guidelines, the revised
project is not required to prepare a subsequent MND.
XIV. Population and Housing
Griffin Ranch Project MND
According to the MND, the previous project would result in less than significant and no
impacts to population and housing. At the time the MND was written, the Griffin Ranch SP
area was designated Very Low and Low Density Residential. Per the MND, the General Plan
land use designations for the Griffin Ranch SP area had the potential to allow up to 478
single family homes on the project site, resulting in 1,200 persons on the 199-acre property.
The development of the Griffin Ranch project proposed a General Plan Amendment and
Zone Change to allow Low Density Residential land uses and zoning, which would generate
303 residential lots, with a maximum population of about 758 persons. The proposed 303
was 62 percent fewer than permitted under the previous Very Low and Low Density
Residential land use designations on the Griffin Ranch property.
The MND stated that even with the entire site at Very Low Density Residential, the project
itself would remain 237 persons and 95 units less than the maximum population potential
under that land use designation. While the specific plan provides development standards to
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govern the project as designed, they are based on a combination of Low Density and Very
Low Density standards. Allowing the Low Density Residential zoning would not affect the
project, and would allow greater flexibility in housing and lot design. It would also encourage
a greater amount of open space in a subsequent development in the event this project does
not build out and the specific plan is revised.
Due to the vacant character of the site, the MND determined that the site would not displace
any existing housing or require replacement housing. Therefore, the MND concluded that
there would be no impact to replacement housing as a result of the project and impacts
associated with the proposed project are expected to be less than significant.
Revised Project
The revised project would not displace any existing housing units or people, as the site is
vacant and located in La Quinta’s Low Density Residential land use and zoning designation.
The revised project proposes to subdivide 20, 1-acre lots to 37 half-acre lots, adding 17
additional lots to an approximately 25-acre property (TTM No. 38083). The addition of the 17
residential lots would increase the population of the 25-acre site by approximately 44
persons, based on the City’s current 2.60 persons per household, as established by the
Department of Finance (DOF). The 20 lots would generate approximately 52 residents, while
the revised project could generate 96 residents on the 25-acre area. However, Low Density
Residential zones in La Quinta allows two to four dwelling units per acre. Therefore, the 25-
acre site could accommodate up to 100 dwelling units, generating 260 residents on the site.
The potential population increase of 44 persons is not substantial since the number of units
proposed for the revised project is consistent with the existing Low Density Residential
designation. Thus, the revised project would not result in any substantial increase or
decrease of population. Similar to the MND, impacts to population growth would be less than
significant.
The additional 17 lots onsite would also not result in indirect impacts such as the need for
additional infrastructure development. The project site, which is a part of the Griffin Ranch
Specific Plan area, is currently provided with existing infrastructure, such as water, sewer,
and cable since the surrounding area is developed as a part of the Griffin Ranch Specific
Plan. Therefore, the revised project would not result in significant indirect growth impacts.
Similar to the MND, the revised project would also not displace any existing housing or
require replacement housing, due to the vacant character of the site. No impacts are
anticipated.
Overall, the revised project would result in slightly increased population on the project site
compared to the previous project due to the proposed addition of 17 residential lots.
However, as stated above, impacts would not be significant. As concluded in the Griffin
Ranch MND and above, both projects would result in less than significant impacts. The
revised project does not propose substantial changes to the project which will require major
revisions of the previous MND or substantial changes with respect to the circumstances
under which the project is undertaken that would require major revisions to the previous
MND. Additionally, new substantially important information that was not included in the MND
is not proposed in the revised project. Therefore, following Section 15162 of the CEQA
Guidelines, the revised project is not required to prepare a subsequent MND.
XV. Public Services
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Griffin Ranch Project MND
The MND found that impacts to public services would be less than significant.
Buildout of the proposed project will generate property tax and sales tax which would offset
the costs of added police and fire services, as well as the costs of general government. The
project will be required to pay the mandated school fees in place at the time of issuance of
building permits. Coachella Valley Unified School District (CVUSD) requested a bus turnout
on Avenue 54, but no such turnout has been requested by Sunline Transit. The MND states
that the City would require the applicant to work with Sunline and CVUSD in finding an
appropriate turnout and incorporating it into improvement plans for Avenue 54. The project
was also expected to provide on-site recreational facilities, and also pay the City’s park fees
for development of off-site park facilities.
The MND determined that the project would result in less than significant impacts to public
services.
Revised Project
Similar to the MND, the revised project would result in less than significant impacts to public
facilities. The revised project would result in less than significant impacts to fire protection,
police services, and school facilities, similar to the proposed project. Therefore, the revised
project will be required to comply with the City’s Development Impact Fees (DIF) to assist
with the funding of public facilities and services, including fire and police services. The
revised project would also be required to pay developer impact fees to the CVUSD to assist
in offsetting impacts to school facilities. The developer impact fees for the District have
increased since the time the MND was written. Currently, fees are $4.08 per square foot for
residential, and $0.66 per square foot for commercial. The revised project would be required
to pay the most current fees. However, with the payment of the DIFs for public facilities and
services, and developer impact fees for the school facilities and parks, the revised project
would result in less than significant impacts to public services, similar to the previous project.
Overall, the revised project would result in slightly increased needs for public services
compared to the previous project due to the proposed addition of 17 residential lots.
However, as stated above, the revised project is required to pay DIF fees to accommodate
the increased needs and impacts would be less than significant. As concluded in the Griffin
Ranch MND and above, both projects would result in less than significant impacts. The
revised project does not propose substantial changes to the project which will require major
revisions of the previous MND or substantial changes with respect to the circumstances
under which the project is undertaken that would require major revisions to the previous
MND. Additionally, new substantially important information that was not included in the MND
is not proposed in the revised project. Therefore, following Section 15162 of the CEQA
Guidelines, the revised project is not required to prepare a subsequent MND.
XVI. Recreation
Griffin Ranch Project MND
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According to the MND, the previous project proposed the development of on-site recreational
spaces/retention areas. The previous project also proposed the removal of a
pedestrian/hiking trail on the Avenue 55 alignment. This trail was identified in the City’s
General Plan and ran east from Madison Street, one-half mile along the Griffin Ranch
property’s southern boundary. At the time the MND was written, the trail did not lead to any
planned or existing park or other public facility, nor was it usable within the existing
improvements for the area. Additionally, Avenue 55 was not planned, either on the
Circulation Element or as a local street. Therefore, it was recommended that the segment be
removed from the General Plan as part of the General Plan Amendment proposed for the
previous project.
The MND also stated that the previous project would contribute park fees for off-site park
development. Therefore, the MND stated that no impacts to City recreational facilities are
expected.
Revised Project
The revised project proposes to subdivide 20, 1-acre lots, to 37 half-acre lots for residential
dwelling units. The addition of 17 proposed residential lots is not proposed to substantially
increase the use of existing neighborhood and regional parks or other recreational facilities
such that substantial physical deterioration of the facilities would occur or be accelerated.
The Griffin Ranch SP area recreation facilities includes open space, a community center with
swimming pool, tennis and pickleball courts. The residents of the revised project will utilize
these existing facilities. Similar to the MND, the revised project would not result in impacts to
public recreation facilities in the City of La Quinta.
Overall, the revised project would result in equal impacts to recreational facilities compared
to the previous project, although the revised project proposes 17 additional residential lots.
However, as stated above, impacts would be less than significant since the Griffin Ranch
neighborhood provides recreational facilities in the community. It is likely that the residents
of the revised project will utilize the Griffin Ranch recreational facilities. As concluded in the
Griffin Ranch MND and above, both projects would result in less than significant impacts.
The revised project does not propose substantial changes to the project which will require
major revisions of the previous MND or substantial changes with respect to the
circumstances under which the project is undertaken that would require major revisions to
the previous MND. Additionally, new substantially important information that was not included
in the MND is not proposed in the revised project. Therefore, following Section 15162 of the
CEQA Guidelines, the revised project is not required to prepare a subsequent MND.
XVII. Transportation
Griffin Ranch Project MND
The 199-acre project setting evaluated by the prior MND was characterized as partially
developed with agricultural and equestrian land uses. The surrounding context included a
combination of undeveloped, residential and golf course uses.
The 2005 Griffin Ranch Specific Plan included a Tentative Tract Map to subdivide the
property into 303 single family residential lots, as well as lettered lots for a community
clubhouse, streets, retention basins, three well sites and an internal equestrian/pedestrian
trail system. The project also included a General Plan Amendment and Zone Change to
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modify the land use designation from Very Low Density Residential and Very Low
Density/Equestrian Overlay to Low Density Residential.
Additionally, the project also proposed to process a General Plan Amendment to modify the
roadway classification of Madison Street from a Major Arterial to a Primary Arterial.
A project specific Traffic Impact Analysis was prepared by Endo Engineering.
The proposed 199-acre Project site consisted of 303 single-family dwelling units in the City
of La Quinta. As part of the proposed Project, the following improvements were included as
Mitigation Measures:
1 Madison Street and Avenue 54 shall be improved to their buildout half width with
development of the proposed project.
2 A Class II bikeway and golf cart path shall be located on Madison and Avenue 54.
3 A left turn pocket shall be constructed in the median on Madison Street at the project
entry to allow for deceleration.
4 Lane geometrics shall be as shown on Exhibit 5.1 of the traffic study.
5 The project proponent shall contribute their fair share to signalization of Jefferson
Street and Avenue 54, Madison Street and Avenue 54 and Monroe Street and
Avenue 54.
The Institute of Transportation Engineers (ITE) trip generation rates were used to calculate
the number of trips forecast to be generated by the proposed Project. The proposed Project
was forecast to generate approximately 2,900 average daily trips (ADT), which included
approximately 223 a.m. peak hour trips and approximately 292 p.m. peak hour trips.
The focused analysis also found, based on approved projects in the area, that potential trips
on Madison Street would be reduced from the General Plan assumption of 41,300 – 43,700
daily trips (based on location) to 30,020 – 32,420 daily trips. The capacity of a 6-lane divided
Major Arterial roadway is 57,000 daily trips, while the capacity of a 4-lane divided Primary
Arterial roadway is 38,000 daily trips. The determination was made that the reduction in daily
trips would lead to a reduction in the appropriate width of Madison Street. The Primary
Arterial (4-lane) classification and cross section were determined to be acceptable to carry
the buildout traffic.
The project applicant’s payment to the Coachella Valley Association of Governments (CVAG)
Transportation Uniform Mitigation Fund (TUMF) Fee Program would have been required as
a condition of the approval process. The fair share contribution of the project to the City of
La Quinta Fee Program for signalization was required as a mitigation measure.
Following compliance with Mitigation Measures and Standard Conditions including adjacent
roadway improvements and payment of TUMF and Development Impact Fees, the project
was expected to result in an acceptable increase in traffic levels on the local roadways and
less than significant impacts were expected.
Revised Project
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The majority of the 2005 Griffin Ranch Specific Plan project has been developed including
all roadway improvements aside from the two roadways that would abut and serve the
proposed project. These roadways include Seattle Slew Way and Afleet Alex Way. Currently
20 lots remain vacant. The area that contains these 20 lots is the property included in the
proposed Tract Map 38083. The revised project proposes the subdivision of the 20 existing
1-acre residential lots into 37 half-acre lots. The 20 lots are currently graded and stabilized
with previously installed utility infrastructure and are centrally located within the Griffin Ranch
community, directly adjacent to the Merv Griffin Estate (not a part of the project). The revised
project proposes to increase the density of the Tract Map 38083 area.
There will be no revisions to the street layout. Buildout of Tract Map 38083 would require the
same categories of compliance plans and final engineering design approvals required of the
2005 Plan to comply with City-specific engineering standards.
The following existing roadways provide access to the project:
Madison Street – Madison Street is a north-south oriented roadway located west of the
project and classified as a 4-lane divided Primary Arterial in the City of La Quinta Circulation
Plan.
Avenue 54 – Avenue 54 is an east-west oriented roadway located north of the project and
classified as a 4-lane divided primary arterial in the City of La Quinta Circulation Plan.
Vehicle Miles Traveled
Changes to the CEQA Guidelines, associated with SB 743, were adopted in December 2018
which require all lead agencies to implement Vehicle Miles Traveled (VMT) as a replacement
for automobile delay-based level of service (LOS) as the new measure for identifying
transportation impacts for land use projects. This statewide mandate went into effect July 1,
2020. To aid in this transition, the Governor’s Office of Planning and Research (OPR)
released a Technical Advisory on Evaluating Transportation Impacts to CEQA (December of
2018) (Technical Advisory). LOS analysis is currently utilized to determine General Plan
Consistency. Per the request of the City of La Quinta TTM 38083 VMT Screening and Trip
Generation/Access Assessment was prepared by Urban Crossroads, Inc.
A CEQA MND Addendum does not require analysis of topics that were not included in the
CEQA Guidelines at the time of adoption of the original MND. However, as requested by the
City of La Quinta, and for informational purposes, a VMT screening is included in this MND
Addendum.
The City of La Quinta utilizes the City of La Quinta Vehicle Miles Traveled Analysis Policy for
VMT assessments and sets forth screening criteria under which projects are not required to
submit detailed VMT analysis. This guidance for determination of non-significant VMT impact
is primarily intended to avoid unnecessary analysis and findings that would be inconsistent
with the intent of SB 743. The City of La Quinta’s VMT Analysis Policy outlines three types
of screening criteria for development projects. The three include:
Project Type Screening: Small projects and Local serving projects may be
presumed to have a less than significant impact. Small projects are those with low
trip generation per existing CEQA exemptions or result in 3,000 Metric Tons of
City of La Quinta Page 41
Draft Addendum October 2021
Carbon Equivalent (MTCO2e) or less. Local serving projects are determined to
shorten non-discretionary trips by putting goods and services closer to residents,
resulting in an overall reduction in VMT.
Transit Priority Area (TPA) Screening: Projects located within a half-mile area
around an existing major transit stop or an existing stop along a high-quality transit
corridor (TPA) may be presumed to have a less than significant impact absent
substantial evidence to the contrary.
Low VMT Area Screening: Residential and office projects located within a low VMT-
generating area may be presumed to have a less than significant impact absent
substantial evidence to the contrary. In addition, other employment-related and
mixed-use land use projects may qualify for the use of screening if the project can
reasonably be expected to generate VMT per resident, per worker, or per service
population that is similar to the existing land uses in the low VMT area.
The project has been reviewed against the City’s VMT Analysis Policy for VMT screening
and based on its size as a small single-family housing project less than or equal to 140
dwelling units, no further VMT analysis is needed.
Project Trip Generation
For this assessment trip generation rates are based on data collected by the Institute of
Transportation Engineers (ITE) in the Trip Generation Manual, 10th Edition, 2017, and the
Trip Generation Manual, 10th Edition Supplement, February 2020.
The ITE Land Use (LU) Code 210 – Single Family Detached has been identified as the
appropriate ITE description of the proposed project. Trip generation rates used to compare
approve and proposed traffic for the site are shown in Table XVII-1 and trip generation
estimates for the currently approved 20 residences are shown in Table XVII-2.
Table XVII-1 ITE Trip Generation Rates
(Note 1)
Land Use
ITE
LU
Code
Quantity
(Note 2)
AM Peak Hour PM Peak Hour Daily
In:Out
Split
Total In:Out
Split
Total
Single Family Detached 210 DU 19:55 0.74 62:37 0.99 9.44
1. Trip Generation Source: Institute of Transportation Engineers (ITE), Trip Generation Manual, 10th Edition (2017).
2. DU = Dwelling Units
ITE trip rates were applied to the existing project as illustrated in Table XVII-2. The currently
approved 20 Dwelling Units are anticipated to generate a total of approximately 189 trip-ends
per day with 15 vehicles per hour during the AM peak hour and 19 vehicles per hour during
the PM peak hour.
Table XVII-2 Approved Site Residential Trip Generation Rates
Land Use
ITE
LU
Code
Quantity
(Note 1)
AM Peak Hour PM Peak Hour Daily
In:Out
Split
Total In:Out
Split
Total
Single Family Detached 210 20 4:11 15 12:7 19 189
1. DU = Dwelling Units
City of La Quinta Page 42
Draft Addendum October 2021
ITE trip rates were applied to the proposed project as illustrated in Table XVII-3. The
proposed 37 Dwelling Units are anticipated to generate a total of approximately 349 trip-ends
per day with 27 vehicles per hour during the AM peak hour and 37 vehicles per hour during
the PM peak hour.
The net difference between the approved and proposed project are also illustrated in Table
XVII-3. The proposed project is anticipated to generate approximately 160 additional trip-
ends per day when compared to the approved residential site, with 12 more vehicles per
hour during the AM peak hour and 18 more vehicles per hour during the PM peak hour.
Table XVII-3 Proposed Project Trip Generation and Net Differences
Land Use
ITE
LU
Code
Quantity
(Note 1)
AM Peak Hour PM Peak Hour Daily
In:Out
Split
Total In:Out
Split
Total
Single Family Detached 210 37 7:20 27 23:14 37 349
Net Difference (Note 2) 17 3:9 12 11:7 18 160
1. DU = Dwelling Units
2. Difference between approved residential for the site and the proposed project.
Site Access and Circulation Context
The proposed project will have three points of access. Merv Griffin Way provides a primary
gated access point for residents and guests. The intersection of Madison Street/Merv Griffin
Way (#3) includes a northbound right turn lane and southbound left turn lane to
accommodate inbound turning movements. Seattle Slew Way connects the project to Merv
Griffin Way and outward to Madison Street at the southwest corner of the site.
An additional gated access point for residents only is located at the Alysheba Drive/Avenue
54 intersection (#1). Donali Street connects the project to Alysheba Drive and outward to
avenue 54 at the northwest corner of the site.
A third gated access point is located at the intersection of Merv Griffin Way/Avenue 54 (#2)
for residents only. Bold Ruler Way connects the project to Merv Griffin Way and outward to
Avenue 54. This access point has a westbound left turn lane for inbound traffic.
Trip Distribution and Assignment
The patten of trip distribution is influenced by the location of the site, the location of
surrounding uses, and the proximity to the regional freeway system. Exhibit 7, Project Trip
Distribution, illustrates the estimated project traffic distribution pattern. Intersection turning
movements are described subsequently for the existing and proposed project.
Madison Street/Merv Griffin Way (#3) Northbound Right Turn Lane: The approved site
residential (20 DU) adds 1 vehicle during the AM peak hour and 3 vehicles during the PM
peak hour to the northbound right turn lane. The proposed project (37 DU) contributes 1
additional vehicle during the AM peak hour and 3 vehicles during the PM peak hour to the
northbound right turn lane.
Madison Street/Merv Griffin Way (#3) Southbound Left Turn Lane: The approved site
residential (20 DU) adds 1 vehicle during the AM peak hour and 2 vehicles during the PM
peak hour to the southbound left turn lane. The proposed project (37 DU) contributes an
additional 2 vehicles during the PM peak hour to the southbound left turn lane.
City of La Quinta Page 43
Draft Addendum October 2021
Alysheba Drive/Avenue 54 (#1) and Merv Griffin Way/Avenue 54 (#2) all Turn Lanes: The
volumes added by the proposed project (in addition to the approved site residential) at
individual turning movements are 2 vehicles or less on all inbound and outbound turns.
Conclusions
The revised project would not introduce a substantial amount of additional vehicle trips to the
area. The project has been reviewed for VMT screening based on its size as a small project,
additional VMT analysis is not necessary and there would be no impact regarding VMT. And
finally, the proposed project will have three access points. Each access point has existing
lane geometrics which have been planned to serve buildout of the Griffin Ranch Specific
Plan area. Volumes added by the proposed project (in addition to the approved site
residential) at both the AM and PM peak hours are considered nominal.
The revised project would not result in increased vehicular conflicts, as the proposed uses
would be similar to the prior proposed uses and existing uses in the surrounding area. The
project is expected to result in less than significant impacts similar to the previous project.
Overall, the revised project would result in slightly increased vehicle volume compared to the
previous project due to the proposed addition of 17 residential lots. However, as stated
above, impacts would be less than significant. As concluded in the Griffin Ranch MND and
above, both projects would not result in significant impacts. The revised project does not
propose substantial changes to the project which will require major revisions of the previous
MND or substantial changes with respect to the circumstances under which the project is
undertaken that would require major revisions to the previous MND. Additionally, new
substantially important information that was not included in the MND is not proposed in the
revised project. Therefore, following Section 15162 of the CEQA Guidelines, the revised
project is not required to prepare a subsequent MND.
N.T.S.
MSA CONSULTING, INC.
> PLANNING > CIVIL
34200 Bob Hope Drive, Rancho Mirage, CA 92270
760.320.9811 msaconsultinginc.com
PROJECT TRIP DISTRIBUTION EXHIBIT
7GRIFFIN RANCH
CEQA ADDENDUM
City of La Quinta Page 45
Draft Addendum October 2021
XVIII. Utilities and Service Systems
Griffin Ranch Project MND
The MND determined that the project would result in less than significant impacts to utilities
and service systems including water infrastructure and supply, wastewater infrastructure,
stormwater infrastructure, or solid waste facilities. According to the MND, utilities are
available to the site or in the immediate facility. Service providers will collect connection and
usage fees to balance the cost of providing services.
Therefore, the MND concluded that the project would result in less than significant impacts
on utility services.
Revised Project
Similar to the MND, the revised project would not result in significant impacts to utilities and
service systems. The revised project would not require grading or construction beyond what
was anticipated in the MND and would not change the allowable uses. As such, no new or
more severe impacts related to utilities and service systems would occur.
Similar to the MND, wastewater generated by the revised project is expected to be minimal.
The revised project is not expected to exceed wastewater treatment requirements of the
State Regional Water Quality Control Board (SRWQCB) (Colorado River Basin). In addition,
City and other local and governmental agency review will ensure compliance with all current
and applicable wastewater treatment requirements. Similar to the MND, the revised project
proposes to connect to existing waste and sewer infrastructure. The revised project would
undergo review by the Coachella Valley Water District (CVWD) and City staff to ensure
wastewater capacity and compliance with the current wastewater treatment requirements.
Additionally, sewer installation and connection fees in place at the time of development will
be collected by CVWD. No new or expanded treatment facilities are anticipated from project
implementation. The revised project would result in similar impacts to wastewater compared
to the previous project. Neither project would result in significant impacts to wastewater
infrastructure.
The revised project would be expected to incorporate storm drain and flood control facilities
to prevent changes to local drainage conditions (patterns, quantities, or velocities) and
adverse erosion and sedimentation impacts. This entitlement would not change the land use
type or increase the tributary area to the existing storm drain system, which is privately
maintained to serve the entire Griffin Ranch community. TTM No. 38083 would follow the
approved drainage condition by allowing conveyance into the existing catch basins on
Seattle Slew Way. For the west part of the project, stormwater would be conveyed to existing
retention Basin 1. For the east part of the project, runoff would be conveyed to Basin 2. Less
than significant impacts to stormwater drainage are expected. The revised project would
result in equal impacts to stormwater drainage compared to the previous project. Neither
project would result in significant impacts.
Like the previous project, the revised project will be required to comply with all construction
requirements and best management practices through the life of the project. Regarding water
supply, the revised project would be expected to follow water conservation guidelines to
mitigate impacts to public water supplies. Examples of these water conservation methods
City of La Quinta Page 46
Draft Addendum October 2021
include water conserving plumbing fixtures, drought tolerant landscaping, and drip irrigation
systems. The revised project proposes to connect to the existing water lines. Additional
domestic water improvements necessary to serve this development will be identified by
CVWD and included as conditions of approval by the City of La Quinta during the City’s
standard review process. Less than significant impacts to water supply are expected. The
revised project would result in similar impacts to water consumption and supply compared to
the previous project. As determined in the Griffin Ranch MND and above, both projects would
not result in significant impacts related to water supply.
In regard to landfill capacity, solid waste generated by the revised project would consist of
standard household/office waste. Residential waste and recycling collected from the revised
project will be hauled to the Edom Hill Transfer Station. Waste from this transfer station is
then sent to a permitted landfill or recycling facility outside of the Coachella Valley. These
include Badlands Disposal Site, El Sobrante Sanitary Landfill and Lamb Canyon Disposal
Site. CalRecycle data indicates that these landfills have 40-50% of their remaining estimated
capacity. Less than significant impacts to solid waste are expected. Additionally, the revised
project would comply with all applicable solid waste statutes and guidelines. No impacts are
expected relative to solid waste statues and regulations. The revised project would result in
similar impacts to solid waste generation compared to the previous project. Neither project
would result in significant impacts to landfills or statues and regulations related to solid waste.
Overall, the revised project would result in similar impacts to utilities and service systems
compared to the previous project. However, as concluded in the Griffin Ranch MND and
above, both projects would not result in significant impacts. The revised project does not
propose substantial changes to the project which will require major revisions of the previous
MND or substantial changes with respect to the circumstances under which the project is
undertaken that would require major revisions to the previous MND. Additionally, new
substantially important information that was not included in the MND is not proposed in the
revised project. Therefore, following Section 15162 of the CEQA Guidelines, the revised
project is not required to prepare a subsequent MND.
XIX. Wildfire
Griffin Ranch Project MND
The Griffin Ranch Project MND did not discuss project-related wildfire impacts since it was
not a required topic by CEQA at the time the MND was written and adopted.
Revised Project
A CEQA MND Addendum does not require analysis of topics that were not required during
the time that the original CEQA document was adopted, however for informational purposes,
new environmental topics required by the most current CEQA Guidelines have been
included, such as this discussion of wildfires.
The revised project is located in an urban context of the City of La Quinta, surrounded by
residential developments to the north, west, south, and east. Human activities on the project
property, such as clearing of native vegetation and grading, is evident onsite. The revised
project is located within the Griffin Ranch Specific Plan area, which proposes a master-
planned community consisting of residential lots, open space recreational areas, and a
community clubhouse area. A majority of the Griffin Ranch Specific Plan area has been
City of La Quinta Page 47
Draft Addendum October 2021
developed, apart from the area east of the revised project and scattered lots south and
southeast of the revised project.
According to CAL Fire’s Fire Hazard Severity Zones (FHSZ) in State Responsibility Areas
(SRA) Map, the project is not located in an SRA or located in an area classified as very high
fire hazard severity zone (VHFHSZ). Additionally, the project property is not located in or
near lands classified as high or moderate fire hazard severity zones. Areas classified as SRA
or VHFHSZs in the City are located in the southern portion of La Quinta, in the Santa Rosa
Mountains. However, wildfires in the undeveloped local mountains adjacent to the Coachella
Valley cities (i.e., Santa Rosa Mountains) are not common due to the mountain’s natural
terrain, which is steep, rocky, and dry. Furthermore, the Santa Rosa Mountains are made up
primarily of Granitic rock and sparse desert vegetation. The topographic character of the
Santa Rosa Mountains is not conducive for the growth of dense vegetation; and as a result,
the amount of fuel available for wildland fires is limited. Additionally, the distance between
the existing vegetation does not allow wildfires to spread easily.
Due to the project’s location in an urban context of the City, and the revised project’s distance
from SRAs and areas designated as VHFHSZs, impacts of wildfires are not anticipated.
XX. Mandatory Findings of Significance
Griffin Ranch Project MND
The MND found that the 199-acre Griffin Ranch Project would result in potentially significant
impacts related to air quality, cultural resources, noise, transportation and traffic. As
previously described, all of these impacts were reduced to below a significant level with the
implementation of mitigation measures.
All other project impacts were found to be less than significant without mitigation, and no
deficiencies related to the City’s General Plan were found to occur. The project would not
result in environmental effects that would cause a substantial adverse effect on human
beings either directly or indirectly.
Revised Project
Similar to the previous project analyzed in the MND, the revised project would result in
potentially significant impacts, however, these impacts would be reduced to less than
significant through implementation of the mitigation measures outlined in the MND. No
additional impacts were identified as a result of the revised project, and no deficiencies were
identified related to the City’s General Plan as a result of the residential project revisions.
The revised project does not propose substantial changes to the project which will require
major revisions of the previous MND or substantial changes with respect to the
circumstances under which the project is undertaken that would require major revisions to
the previous MND. Additionally, new substantially important information that was not included
in the MND is not proposed in the revised project. Therefore, following Section 15162 of the
CEQA Guidelines, the revised project is not required to prepare a subsequent MND.
City of La Quinta Page 48
Draft Addendum October 2021
Sources
California Emission Estimator Model (CalEEMod) Version 2020.4.0, California Air Pollution
Control Officers Association (CAPCOA), May 2021.
City of La Quinta General Plan, adopted February 2013.
City of La Quinta General Plan Environmental Impact Report, adopted November 2013.
City of La Quinta Municipal Code
City of La Quinta Vehicle Miles Traveled Analysis Policy, Resolution 2021-0007, July 2021.
TTM 38083 VMT Screening and Trip Generation/Access Assessment, Urban Crossroads,
September 2021.
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix A – Adopted Griffin Ranch Specific Plan
(2004-074) and Mitigated Negative
Declaration (EA 2004-526)
GRIFFIN RANCH
City of La Quinta
Specific Plan
2004-074
Adopted January 4, 2005
Resolution 2005-005
Prepared for
TRANSWEST HOUSING, INC.
47-120 Dune Palms Road – Suite C
La Quinta, California 92253
760-777-4307
Prepared by
MSA CONSULTING, INC.
34200 Bob Hope Drive
Rancho Mirage, California 92270
760-320-9811
Griffin Ranch
Specific Plan
Table of Contents
I. INTRODUCTION
Purpose......................................................................................1
Executive Summary ...................................................................3
The Process...............................................................................5
Relationship to Other Agencies .................................................6
II. SPECIFIC PLAN
Project Description...................................................................16
Art in Public Places ..................................................................17
Phasing Plan............................................................................17
Hydrology and Flood Control....................................................18
Grading Concept ......................................................................18
Erosion Control ........................................................................19
SWPPP/NPDES/PM 10............................................................20
Utilities .....................................................................................20
III. LAND USE PLAN
Land Use..................................................................................28
Development Standards...........................................................28
Additional Development Standards ..........................................30
Alterations to the Specific Plan.................................................32
IV. CIRCULATION
Vehicular..................................................................................33
Pedestrian/Equestrian..............................................................34
V. DESIGN GUIDELINES
Landscape Concepts ...............................................................39
Landscape Maintenance..........................................................41
General Architectural Theme ...................................................41
As Adopted January 4, 2005 i
LIST OF EXHIBITS
Exhibit 1 Vicinity Map.............................................................................7
Exhibit 2 Aerial Photograph ..................................................................8
Exhibit 3 USGS Map..............................................................................9
Exhibit 4 Proposed Land Use Plan ......................................................10
Exhibit 5 Existing Zoning Map..............................................................11
Exhibit 6 General Plan Map .................................................................12
Exhibit 7 Site Photos I..........................................................................13
Exhibit 7a Site Photos II.........................................................................14
Exhibit 8 Tentative Tract /Site Plan ......................................................15
Exhibit 9 Proposed Phasing Plan .........................................................23
Exhibit 10 FEMA Map............................................................................24
Exhibit 11 Existing Utilities Plan .............................................................25
Exhibit 12 Preliminary Water Service Plan.............................................26
Exhibit 13 Preliminary Sewer Service Plan............................................27
Exhibit 14 Street Cross Sections............................................................35
Exhibit 15 Circulation Exhibit .................................................................36
Exhibit 16 Spine Road Plan ...................................................................37
Exhibit 17 Rural Road Plan ....................................................................38
Exhibit 18 54th Avenue Landscape Plan ................................................45
Exhibit 19 Madison Street Landscape Plan ...........................................46
Exhibit 20 Clubhouse/Equestrian Plan ...................................................47
Exhibit 21 Spine Road Front Yard Typical .............................................48
Exhibit 22 12K Lots Front Yard Typical..................................................49
Exhibit 23 15K Lots Front Yard Typical..................................................50
Exhibit 24 20K Lots Front Yard Typical..................................................51
Exhibit 25 Main Entry Plan.....................................................................52
Exhibit 26 Guard House Elevation.........................................................53
Exhibit 27 Main Gate Elevation..............................................................54
Exhibit 28 Secondary Entry Plan View ...................................................55
Exhibit 29 Perimeter Wall and Fence Plan.............................................56
Exhibit 30 Clubhouse Architecture .........................................................57
Exhibit 31 Architectural Elevation - Monterey ........................................58
Exhibit 32 Architectural Elevation – Italian Farmhouse..........................59
Exhibit 33 Architectural Elevation – Contemporary Mexican..................60
Exhibit 34 Architectural Elevation – Spanish Colonial............................61
Exhibit 35 Architectural Elevation - Andalusian......................................62
List of Tables
Table 1 Master Plant Palette...............................................................42
As Adopted January 4, 2005 ii
APPENDIX
Appendix One – General Plan Policies
Appendix Two - Definitions
Appendix Three – Section 9.140.070 La Quinta Municipal Code
Appendix Four – Adopting Resolutions/Ordinance
Resolution 2005-003 ..............Environmental Assessment 2004-526
Resolution 2005-004 ................General Plan Amendment 2004-103
Resolution 2005-005.................................... Specific Plan 2004-074
Resolution 2005-006......................................Tentative Tract 32879
Ordinance 413 ............................................. Zone Change 2004-122
SPECIAL REPORTS
(Submitted under separate cover)
Traffic Impact Analysis
Historical/Archaeological Resources Survey
Geotechnical Evaluation
Biological Assessment
Air Quality and Noise Impact Study
As Adopted January 4, 2005 iii
Griffin Ranch Specific Plan City of La Quinta
SECTION 1 INTRODUCTION
PURPOSE
The purpose of this Specific Plan is to set forth the detailed development principles,
guidelines, and programs to facilitate the development of a 199 +/- acre site located
on the south side of Avenue 54 and east of Madison Street. (Exhibit 1-Vicinity) The
proposed project is single family subdivision.
This Specific Plan is intended to meet the requirements for a Specific Plan as set
forth in State law. The State authorizes cities and counties to adopt Specific Plans
as an appropriate tool in implementing their General Plans. Such a plan is to include
the detailed regulations, conditions, programs, and any proposed legislation that is
necessary for the systematic implementation of the General Plan. The Specific Plan
provides the linkage between the General Plan, the general goals and policies of the
City, and the detailed implementation of that plan with tools such as zoning
ordinances, subdivision ordinances, and the like. The Government Code (Section
65451) sets forth the minimum requirements of a Specific Plan and states:
"A Specific Plan shall include a text and diagram or diagrams which specify all
of the following in detail:
1). The distribution, location, and extent of the uses of land, including
open space, within the area covered by the plan.
2). The proposed distribution, location and extent and intensity of major
components of public and private transportation, sewage, water,
drainage, solid waste disposal, energy, and other essential facilities
proposed to be located within the area covered by the plan and
needed to support the land uses described by the plan.
3). Standards and criteria by which development will proceed, and
standards for the conservation, development, and utilization of natural
resources, where applicable.
As Adopted January 4, 2005 Page 1 of 62
Griffin Ranch Specific Plan City of La Quinta
4). A program of implementation measures including regulations,
programs, public works projects, and financing measures necessary to
carry out paragraphs (1), (2), and (3)."
The Specific Plan shall include a statement of the relationship of the specific plan to
the General Plan. The establishment of specific performance, design, and
development standards is set forth to guide the development of the subject property
in such a way as to implement the General Plan while maintaining some flexibility to
respond to changing conditions which may be a factor in any long term development
program.
This document acts to augment the City's Zoning Ordinance by providing particular
design guidelines, a tailored list of allowable, conditionally allowable, and prohibited
uses for the site, and unique development standards. The site plan, architectural and
landscape illustrations in the Specific Plan establish a design theme with detailed
perspectives. These illustrations are conceptual and do not constitute precise pre-
construction drawings.
As Adopted January 4, 2005 Page 2 of 62
Griffin Ranch Specific Plan City of La Quinta
EXECUTIVE SUMMARY
Griffin Ranch is a proposed single family subdivision located on approximately 199
+/- acres of property located on the south side of Avenue 54 and east of Madison
Street within the City of La Quinta (Exhibit 2). The land use designation on the City's
General Plan is LDR-Low Density Residential with up to 4 du/acre on the southwest
corner of the site, and VLDR–Very Low Density Residential with up to 2 du/acre on
the remainder of the site (Exhibit 6). The zoning is RL, Low Density Residential (2-
4du/ac) and RVL, Very Low Density (0-2du/ac) both designations have an
Equestrian Overlay (Exhibit 5). This designation permits the development of single
family homes on large lots.
The site has approximately 2,600 feet of frontage on the east side Madison Street
and 2,300 feet of frontage along the south side of 54th Avenue. Madison Street is
designated as a Major Arterial (6D) and 54th Avenue as a Secondary Arterial (4U)
according to the City’s General Plan. Both 54th Avenue and Madison Street are
designated as an Agrarian Image Corridors and require Class II Bike Trails (On
Road Bicycle Lane) along Madison Street and Pedestrian/ Hiking Trails along 54th
Avenue and Madison Street. The surrounding properties are vacant with scattered
residences to the north, single family residences and vacant land to the east, and
PGA West to the west and to the south. Site photos are illustrated on Exhibits 7 and
7a.
The project is a single family subdivision with common recreational facilities (Exhibit
4). The homes will be a mixture of one and two story structures on lots ranging in
size from a minimum of 11,000 to over 40,000 square feet in size. In the southwest
corner of the site will be an 11 +/- acre Community Recreation and Open Space
Area available for equestrian uses with access to a central riding/arena area and on
site trails. This area will also include a clubhouse facility for residents and members
with such amenities as pool, spa and tennis courts (See Exhibits 20 and 30).
As Adopted January 4, 2005 Page 3 of 62
Griffin Ranch Specific Plan City of La Quinta
Landscaping and a meandering multi use trail will surround the project along its
entire public street frontage.
Exhibit 8 illustrates the Tentative Tract Map/Site Plan for the project. Three
entrances to the site are proposed. The primary entrance on Madison Street shall
be for resident and guest entry. This entry shall be staffed with security personnel.
The two secondary entrances located on 54th Avenue will be for residents utilizing
card transponders. The project will contain private streets and an equestrian multi-
purpose trail.
As Adopted January 4, 2005 Page 4 of 62
Griffin Ranch Specific Plan City of La Quinta
THE PROCESS
The purpose of a Specific Plan is to provide a detailed plan for a selected area within
the City for the purpose of implementing the General Plan. This Specific Plan
outlines and directs all facets of development for this site. The standards of
development delineated in this Specific Plan create a link between the General Plan
and the Zoning Ordinance. Development of the project is allowed through adoption
of a Mitigated Negative Declaration of Environmental Impact, amendment to the
General Plan Circulation, Change of Zone from RVL to RL (Residential Low),
approval of the Griffin Ranch Specific Plan and approval of Tentative Tract Map No.
32879 (Exhibit 8) to subdivide 199 +/- acres into 303 lots.
Implementation of this Specific Plan is intended to carry out the goals and policies
contained in the General Plan of the City of La Quinta in a planned and orderly
fashion. The land use designation on the City's General Plan is LDR - Low Density
Residential up to 4 du/acres, and VLDR – Very Low Density Residential up to 2
du/acre. The zoning is RL - Low Density Residential (2-4 du/acre) and RVL - Very
Low Density Residential (0-2 du/acre) both designations have an Equestrian
Overlay.
The proposed project density of 1.52 dwelling units/acre is below the maximum
permitted of 2 dwelling units per acre (20% of the site is zoned for 4 dwelling units
per acre). The 303 units proposed are below the combined overall allowable
number of 468 units. A comparison of the project’s development plan to the City’s
General Plan Goals and Policies are contained in Appendix One.
The City of La Quinta, as Lead Agency for the project, required an Environmental
Assessment to include an Archaeological Report, Traffic Study, Geotechnical
Investigation, Biological Assessment and Noise and Air Quality analysis of the site.
A summary of each study’s findings follows.
As Adopted January 4, 2005 Page 5 of 62
Griffin Ranch Specific Plan City of La Quinta
CRM Tech completed the Archaeological Report. This study determined in its
findings that the site does not constitute as a potential historic resource. The study
also determined that the site’s historical significance cannot be ascertained without
further archaeological excavations. An Archaeological testing and evaluation
program is recommended as mitigation.
Endo Engineering prepared the Traffic Impact Study as well as the noise and air
Quality Analysis and identified mitigation measures to be incorporated into the
project’s condition of approval to minimize the potential for any adverse impacts
associated with the development.
Sladden Engineering prepared the Geotechnical Investigation and determined that
the proposed site is feasible for residential development.
JWC Ecological Consultants prepared the Biological Assessment and determined
that the project will have no significant adverse impacts to the biological resources of
the region.
The project site contains the proper land use designation for the uses proposed.
Exhibit 5 depicts the zoning on the site and the surrounding parcels. The City of La
Quinta requires a Specific Plan to provide a detailed plan for modifications to the
development standards.
RELATIONSHIP TO OTHER AGENCIES
In addition to City approvals, permits will be required by the Coachella Valley Water
District (CVWD) for improvements to the water and sewer lines. Other infrastructure
improvements will be required by Imperial Irrigation District (electrical power),
Verizon for telephone service and Time Warner for cable TV service.
As Adopted January 4, 2005 Page 6 of 62
Griffin Ranch Specific Plan City of La Quinta
SECTION II SPECIFIC PLAN
PROJECT DESCRIPTION
The project site is a total of 199 +/- gross acres. The site is vacant and there are no
significant landforms or scenic features on the site except for a private ranch home
in the out parcel of the site. The project will provide a grouping of lots into custom
homes and semi-custom home sites. Custom homes will be built on 1-acre lots with
semi-custom homes built on lots ranging in size from 11,000 to 40,000 square feet
(Exhibit 4). The Plan will integrate architecture and landscape architecture into a
pleasant residential setting with equestrian amenities.
The Griffin Ranch will be a gated community consisting of up to 303 single-family
homes ranging in size from 2,800 to approximately 5,500 square feet, incorporating
equestrian amenities accessing a common riding area and trails. The custom lots
will be built around the out parcel of the site having south or west views of the area.
Most homes will enjoy a view of the Santa Rosa Mountains and will accommodate
the construction of a pool and spa in the rear yard. Each floor plan will have three to
four front elevations illustrating one of the following styles: Andalusian, Monterey,
Spanish Colonial, Contemporary Mexican, and Italian Farmhouse. The overall theme
envisions earth-tone stucco colors accented by the use of arches, courtyards,
smooth style stucco and clay roof tiles. Other exterior standard features include
detached casitas, covered rear yard porches and patios, three car garages, masonry
walls, and front yard landscaping.
Griffin Ranch will be surrounded by a masonry wall up to 8.5’ in height with smooth
stucco and metal ornamental iron, pilasters and desert friendly landscaping on the
perimeter, including the multi-purpose trail along Madison Street and 54th Avenue.
As Adopted January 4, 2005 Page 16 of 62
Griffin Ranch Specific Plan City of La Quinta
There will be three gated entries into the project. The main entry on Madison Street
will be staffed by security personnel and utilized for resident and guest entry. The
two entries on 54th Avenue will be for resident access only. Each gated entry will
include monument signage.
The main gated entry on Madison Street will include extensive entry features and
landscaping. A meandering multi purpose trail will be provided along the perimeter of
the site with exception of along the perimeter at the southern boundary. The two
secondary entries on 54th Avenue will also have a meandering multi purpose trail.
The project will include privately maintained streets and open space with low profile
lighting to preserve the visibility of the naturally clear skies of the desert.
Art in Public Places and Recreation
The requirement for Art in Public Places will be satisfied in accordance with Chapter
2.65 of the La Quinta Municipal Code. Recreational requirements will be satisfied in
accordance with Section 13.65 of the La Quinta Municipal Code.
Phasing Plan
The project will be constructed in three phases. See Exhibit 9. Phase I shall include
commencement of construction of public street frontages along Madison Street and
the westernmost section of 54th Avenue prior to the 25th production home and the
east/west spine road and westernmost portion of the site. Phase II shall include
commencement of construction at the easternmost section of 54th Avenue upon
issuance of the 50th building permit or May 31, 2006; whichever comes first. Phase
II will also include construction of the central third portion of the site. Phase III will
include construction of the easternmost third portion of the site. All off-site
improvements are to be constructed as conditioned in the approval of Tentative
Tract Map No. 32879 and Specific Plan 2004-074. All areas left vacant during
construction will be stabilized using soil stabilization techniques and materials. Prior
to issuance of the first certificate of occupancy the project shall complete the parkway
landscaping, walls and gates along Madison Street. See Exhibits 18 and 19.
As Adopted January 4, 2005 Page 17 of 62
Griffin Ranch Specific Plan City of La Quinta
Hydrology and Flood Control
The site lies in flood Zone C according to Community Panel No. 060245-2300 B
dated March 22, 1983. Zone C is an area of minimal flooding; no special protection
or measures are required. (Exhibit 10)
Grading
The site will be graded in a single phase. It is anticipated that there will be a balance
of material on the site. The preliminary grading concept for the property shows
retention basins located throughout the site for retention of storm flows and nuisance
water.
The Coachella Valley has been classified by the Environmental Protection Agency
(EPA) as a “serious” non-attainment area for PM10 particulate dust. During periods
of moderate to heavy wind conditions, wind-blown dust and sand are a concern with
grading operations. Because of health concerns, the Environmental Protection
Agency has instituted a plan in the valley to curb fugitive dust. Storm Water
Pollution Prevention Plan (SWPPP), National Pollution Discharge Elimination
System and PM 10 mitigation plans will be adhered to as measures utilized in order
to control the wind and water born erosion associated with grading operations.
The grading operations shall include adequate provisions for wind and water erosion
control during as well as after grading operations have ceased. The details of
erosion control shall be included in the project’s Storm Water Pollution Prevention
Plan (SWPPP) and PM-10 Plan.
As Adopted January 4, 2005 Page 18 of 62
Griffin Ranch Specific Plan City of La Quinta
Erosion Control
The project will comply with the City’s erosion control ordinance. The grading
operations shall include adequate provisions for wind and water erosion control
during as well as after grading operations have ceased. The details of erosion
control shall be included in the project's Storm Water Pollution Prevention Plan
(SWPPP) and PM 10 Plan.
• Pre Grading --The portions of the site to be graded shall be prewatered to a
depth designated by the soils engineer prior to the onset of grading operations.
• During Grading -- Once grading has commenced, and until grading has been
completed, watering of the site and/or other treatment(s) determined to be
appropriate shall be ongoing.
• Post Grading -- All disturbed areas shall be treated to prevent erosion for the
term that the area will remain undeveloped. Wherever feasible, final landscape
and irrigation shall be installed.
• On-Site Observer – Throughout the grading portion of the construction, any
project with a disturbed surface area of 50 or more acres shall have an On-Site
Environmental Observer that:
o Is hired by the property owner or developer, and
o Has dust control as the sole or primary responsibility,
o Has successfully completed the AQMD Coachella Valley Fugitive Dust
Control Class and has been issued a Certificate of Completion for the class,
and is identified in the approved Fugitive Dust Control Plan as having the
authority to immediately employ dust mitigation 24-hours per day, 7 days a
week and to ensure compliance with this ordinance, the approved Fugitive
Dust Control Plan, AQMD regulations and the Coachella Valley Model Dust
Control Ordinance.
As Adopted January 4, 2005 Page 19 of 62
Griffin Ranch Specific Plan City of La Quinta
SWPPP/NPDES/PM 10
Since the Coachella Valley experiences periods of moderate to heavy wind
conditions, wind-blown dust and sand is a concern with mass grading operations.
Because of health concerns, the Environmental Protection Agency has instituted a
plan in the valley to curb excess PM 10 (small particle dust). The City also
participates in the National Pollutant Discharge Elimination System program.
The City of La Quinta requires SWPPP, NPDES and PM 10 plans to control the wind
and water born erosion associated with such grading operations. The project will
comply with the City's requirements relative to these programs.
UTILITIES
Water Plan
Coachella Valley Water District (CVWD) provides water service in the City. There is
an existing 18” water line located along the west side of Madison Street. There is
also an 18” water main along the south side of 54th Avenue (Exhibit 11). Exhibit 12
illustrates the location of proposed water mains throughout the project.
The project proposes 3 well sites. Each well site is approximately a half-acre in size.
The well sites are located along the northern and eastern boundaries of the project.
These well sites will be dedicated to the Coachella Valley Water District.
The Coachella Valley Water Management Plan, November 2000, was prepared to
address a valley-wide overdraft of the groundwater basin. Water conservation goals
within the plan include reducing urban water demand by 10 percent. This project will
positively contribute to offsetting the overdraft by incorporating the goals of the
management plan and implementing water conservation measures.
As Adopted January 4, 2005 Page 20 of 62
Griffin Ranch Specific Plan City of La Quinta
Measures that promote water conservation include more efficient landscaping,
irrigation and utilization of water efficient plumbing fixtures.
Sewer Plan
Sanitary sewer facilities for La Quinta are provided by Coachella Valley Water
District (CVWD). There are no facilities along the northern boundary of the site on
54th Avenue. Along the eastern side of Madison Street is a 33” gravity sewer main
with a southerly flow. Likewise, there is an 18” sewer force main east of the gravity
sewer main also with a southerly flow. Both gravity and force mains are at the
southeast corner of Madison Street and 54th Avenue (See Exhibit 11). Exhibit 13
illustrates the location of proposed sewer service within the development. Eight inch
sewer mains will be constructed within private streets throughout the site. The
sewer mains will be connected to an off-site connection point located east of the
project on Monroe Street.
Electrical Plan
The Imperial Irrigation District provides electric facilities in La Quinta. There is a
12.5kv power distribution line on the east side of Madison Street. There is also
12.5kv power distribution on the north side of 54th Avenue (See Exhibit 11). At
Madison Street and 54th Avenue distribution wires are underground and run west of
the site. The City will require the installation of electrical services to be underground
if the voltage is less than 34 KV. All electrical service to the residences will be
placed underground.
As Adopted January 4, 2005 Page 21 of 62
Griffin Ranch Specific Plan City of La Quinta
Other Utilities
The Gas Company provides natural gas services. There is a 4” gas main on the east
side of Madison Street and 2 gas mains (8”-high pressure transmission line and a 6”
distribution line) on the north side of 54th Avenue. This service is adequate to serve
the development.
Time Warner Cable provides television cable service to the area. There is service
available along the east side of Madison Street and along the north side of 54th
Avenue.
Verizon will provide telephone service. Based on site visits, there are service
connection points along the east side of Madison Street and along the north side of
54th Avenue.
Waste Management of the Desert provides waste disposal service. Plans for
incorporating recycling facilities will be considered for the development. All
appropriate City staff shall review facilities for compliance with all City ordinances.
As Adopted January 4, 2005 Page 22 of 62
Griffin Ranch Specific Plan City of La Quinta
SECTION III LAND USE
Land Use Plan
The Tentative Tract Map No. 32879 will serve as the development plan for Griffin
Ranch. See Exhibit 8.
Development Standards
The uses and development standards will generally be in accordance with the
provisions of the La Quinta Zoning and General Plan regulations. Should conflict
occur between the regulations and the Plan, the provisions of the Plan and
supporting text shall prevail. The following proposed development standards are
applicable to the Griffin Ranch Specific Plan and are meant to augment Sections
9.40 -9.60 and 9.140 of the City’s Municipal Code. Section 9.140, Equestrian
Overlay Regulations, is included as Appendix Three.
RESIDENTIAL PERMITTED USES
Single-family dwellings
Attached or Detached Casitas
Garages and carports
Patio Covers, decks and gazebos
Fences and walls
Swimming pools, spas and cabanas
Parks and Open Space, bicycle, equestrian and hiking trails
Satellite dishes and antennas
Clubhouse, Open Membership – See Clubhouse permitted uses
Model home complex and sales office
As Adopted January 4, 2005 Page 28 of 62
Griffin Ranch Specific Plan City of La Quinta
RESIDENTIAL DEVELOPMENT STANDARDS
Minimum lot size for single-family
dwellings (sq. ft.)
11,000
Minimum lot frontage on cul-de-sacs and
knuckles/ irregular lots
35’
Maximum structure height (ft.)1 28’
Maximum number of stories 2
Minimum lot width 95’
Minimum lot depth 110’
Minimum front yard setback (ft.)
Equestrian Trail Lots
Non-Equestrian Trail Lots
30’
20’
Minimum garage setback 20’
Side-loaded garage setback 15’
Minimum distance between structures 10’
Minimum side yard setback (ft.)
Interior lots
Corner Equestrian Trail lots
Corner Non-Equestrian Trail lots
15’ combined no less than 5’
20’
10’
Minimum rear yard setback (ft.) 2 20’
Maximum lot coverage (% of net lot area) 50%
Minimum livable area excluding garage
(sq. ft.)
2800 sf
Maximum height of project perimeter walls
and walls along the out parcel (ft.)
8.5’
Maximum height of interior yard walls (ft.) 6’
*GENERAL NOTES*
1. The maximum structure height for all buildings shall be 22 feet for all buildings located within
150 feet of any General Plan-designated Image Corridor. However, for any residential lots of
20,000 square feet or more, this restriction shall not apply.
2. Patio structures may have a rear yard setback of fifteen (15) feet.
As Adopted January 4, 2005 Page 29 of 62
Griffin Ranch Specific Plan City of La Quinta
CLUBHOUSE PERMITTED USES
Private Equestrian Club for residents plus up to 150 Open Memberships
Putting Green
Up to 3 Tennis Courts
Swimming Pool/Spa
Locker Rooms
Sauna, Weight Room
Billiards, Card Room
Reading, Gathering Room
Private Restaurant, Bar, Lounge with 50-60 Seating Capacity
CLUBHOUSE DEVELOPMENT STANDARDS
Minimum Building Street Setback 40 feet
Minimum Building Abutting Single
Family Lot Setback
20 feet
Minimum Building-to-Parking Setback 10 feet
Minimum Building-to-Building
Setback
10 feet
Minimum lot size 20,000 square feet
Maximum Building Height 2 story
40’/Tower 36’/Ridge
Maximum Lot Coverage 50%
Parking 40 Auto Parking 15 Golf Cart Parking
Minimum Clubhouse Size 4,000 – 8,000 square feet
ADDITIONAL DEVELOPMENT STANDARDS
Accessory Structures
Accessory structures are structures other than a garage which is detached from a
principal structure on the same lot, incidental to the principal building and not
designed for human habitation.
• Maximum height shall be 10’
• Minimum setback from main building 10’
• Minimum rear yard setback 5’
• Minimum interior side/exterior side setback 5’
As Adopted January 4, 2005 Page 30 of 62
Griffin Ranch Specific Plan City of La Quinta
Pools
• Swimming pools and spa’s water surface shall not be closer than 5’ to any
side/rear property line and no closer than 10’ to front property line or main
structure.
Mechanical Equipment
Heating/air conditioning (HVAC) or other type of equipment shall be mounted on the
side of the structure or on the ground. No roof-mounted equipment shall be
permitted. The HVAC shall be placed on the non-gated side of the yard and shall
maintain a minimum of 3 feet of clearance between the property line and the
equipment. All HVAC and similar equipment must be visually screened. Screens
shall be designed and constructed to intercept both equipment view, and to the
extent feasible, noise. The method of screening must be functionally and
architecturally compatible in terms of materials, color, shape and size. The screening
design shall blend with the building design. Wherever individual equipment is
provided, a continuous screen is desirable.
Patios/Overhangs/Shade Requirements
• Eaves or roofs may overhang into the required setback a maximum of 18”.
Walls and Fences
Perimeter Walls – Perimeter walls will be installed in conformance with the project
phasing plan to ensure consistency in the construction of the project’s perimeter
walls. These walls may be up to 8.5’ in height with masonry block and smooth
stucco finish. These walls may be constructed as all-view fencing, all masonry, or a
combination thereof. The wall may be constructed with a combination of masonry
block with smooth stucco, slump stone, view fence, or ornamental iron fencing, or of
a combination fencing and landscape berm with pilasters. See Exhibit 29.
As Adopted January 4, 2005 Page 31 of 62
Griffin Ranch Specific Plan City of La Quinta
An acoustical analysis shall be prepared for submission to the City for the perimeter
wall permit to ensure that sound attenuation is achieved with the ultimate wall design
and that such design is consistent with City of La Quinta noise standards and
policies.
Residential Walls – Fencing along the side and rear yards of the residences will be
a decorative masonry block. Maximum height of interior walls shall be six (6) feet.
Common Area Walls – Split rail fences will be used throughout the interior and
along the perimeter to define the Multi-Use Trail.
ALTERATIONS TO THE SPECIFIC PLAN
The Director of Community Development shall have the authority to determine
substantial conformance with the provisions of this Specific Plan when the changes
are less than 5%; The Planning Commission shall review changes that vary between
5% and 10%; the City Council shall review all changes greater than 10%.
As Adopted January 4, 2005 Page 32 of 62
Griffin Ranch Specific Plan City of La Quinta
SECTION IV CIRCULATION
Vehicular
The Griffin Ranch Plan will utilize the adjacent street system in a manner consistent
with the City of La Quinta General Plan Circulation Plan. The property is located on
the south side of 54th Avenue and east of Madison Street. 54th Avenue is
designated as a Secondary Arterial and Madison Street is designated as a Major
Arterial. The project shall dedicate additional right of way to achieve 44’, ultimate
right of way along 54th Avenue and additional right of way to achieve 55’, ultimate
right of way along Madison Street. Street widening and improvements will be
completed as part of this development. Street Cross Sections are shown in Exhibit
14.
The main entry at Madison Street will provide the initial opportunity for thematic
identification for the community. This entrance shall be staffed by security personnel
and will serve as the entry for residents and guests. 54th Avenue will provide 2
secondary entrances to the site and shall be point of access for residents only. The
landscape design along the project frontage shall be complementary to landscaping
in the area and the goals of the General Plan for Image Corridors. See Exhibits 18
and 19.
Madison Street and 54th Avenue are both identified in the La Quinta General Plan as
Agrarian Image Corridors. Standards for Image Corridors will be complied with
according to the City’s Development Code.
The spine road beginning at the main entry on Madison Street to the second round-
about will be 55’ wide with a staggered raised median. This spine road will then
continue to the easternmost boundary of the site at a width of 41’.
As Adopted January 4, 2005 Page 33 of 62
Griffin Ranch Specific Plan City of La Quinta
The secondary entries on 54th Avenue will have a raised median up to the first
intersection of the project. Both secondary entries shall have 41’ wide streets from
point of entry to the round-about at the western entrance and to the spine road at the
eastern entrance (See Exhibit 28).
Pedestrian/Equestrian
Griffin Ranch will provide a meandering multi use trail surrounding the site’s
perimeter along Madison Street, 54th Avenue and its eastern boundary. These multi
purpose trails shall contain walking paths along one side of the spine street, the
secondary entrances to the spine street and along the perimeter of the out parcel.
The trail will provide access through the community and to the exercise arena
located in the southwest portion of the site. There is a private central riding path that
will connect to trails on the site perimeter. See Exhibit 16. The retention areas
throughout the project will provide opportunity for walking and passive recreation.
As Adopted January 4, 2005 Page 34 of 62
Griffin Ranch Specific Plan City of La Quinta
Section V. DESIGN GUIDELINES
LANDSCAPE CONCEPTS
The proposed Griffin Ranch landscape theme focuses on developing images of an
equestrian oriented community set within the desert region that will complement the
equestrian essence of the eastern portion of La Quinta. The landscape theme seeks
to develop the association by utilizing a trail system and planting concept designed
to strengthen the basic fabric and overall theme of the community through the use of
specific plant material to define and reinforce the project entries, street patterns and
neighborhood identity. Canopy trees, split rail fencing, enhanced desert planting,
masonry/stone walls, and lawn create a dynamic landscape statement to this new
development. See Exhibits 18 and 19. The proposed plant palette for the common
areas is illustrated on Table 1. The Master Plant list shall be approved by the
Riverside County Agricultural Commissioner’s Office prior to planting.
The generous setback to the proposed perimeter wall allows for a dramatic
streetscape, which incorporates multi use trails, smooth stucco walls with iron fixture
treatments and decorative view fencing with pilasters at the project entries. Project
entries will incorporate a rural equestrian flavor with natural water features, project
signage, stone walls and pilasters, rustic vehicular and pedestrian gates. Enhanced
paving and accent planting also embrace the landscape theme at the project entry
(See Exhibit 25).
The interior of the project follows the equestrian theme. Trails of decomposed
granite bordered by split rail fencing meander throughout Griffin Ranch. There is a
specifically designed area for horse related activities. Trails with accent landscaping
flourish in the area used for equestrian riders. Additional open spaces are for
passive and active use. Pedestrian trails, free play (lawn), park benches and
gazebos occupy the open spaces for non-equestrian use (See Exhibit 20).
As Adopted January 4, 2005 Page 39 of 62
Griffin Ranch Specific Plan City of La Quinta
The equestrian landscape theme at Griffin Ranch will be reinforced by the
incorporation of meandering trails throughout the interior and exterior of the project.
The decomposed granite trails will be enhanced by split fencing and accent planting
to complement the project’s theme.
Landscaping for each of the front yards will be designed to embrace the overall
community theme utilizing desert appropriate landscape materials that provide
shade, seasonal color and texture. Minimum landscape standards as required by
the City of La Quinta shall be met as well as complying with irrigation standards (See
Exhibits 21, 22, 23 and 24).
Landscape and irrigation plans for all developer provided landscape including the
project entries, community center, streetscapes, retention areas and perimeter walls
shall be prepared by a licensed Landscape Architect. Landscape and irrigation
plans shall meet the City of La Quinta’s minimum requirements and be approved
and signed by all governing agencies prior to being approved for construction.
Project Entry Treatment
Madison Street will be the main entry to the project. It will provide initial opportunity
for thematic identification for the community. It will be a security staffed gate for use
by residents, visitors and guests entering the exiting the project. The landscape
design will incorporate a rural equestrian flavor with natural water features, project
signage, stone walls and pilasters, rustic vehicular and pedestrian gates. Enhanced
paving, willow-like canopy trees and accent planting will complement the landscape
theme (See Exhibits 25, 26 and 27).
54th Avenue will provide two secondary entries to the project. Entry is for residents
only and will be operated by an entry transponder. The theme will be consistent with
the overall project theme which includes vehicular gates, entry walls, signage,
enhanced paving and accent planting (See Exhibit 28)
As Adopted January 4, 2005 Page 40 of 62
Griffin Ranch Specific Plan City of La Quinta
Interior streets of the project will carry the equestrian theme. Setbacks for the
residential units along the interior collector street and the singled loaded rural street
allow for the addition of rails and fencing meandering through the project thereby
contributing to the community image (See Exhibits 21, 22, 23 and 24).
Landscape Maintenance
The common areas will be maintained by the Home Owner’s Association. Trees will
be double staked with two inch minimum lodge poles and shall be irrigated with
bubblers or emitters. No spray irrigation shall be placed within 18 inches of street
curbs. Prior to installation the City shall inspect trees to determine appropriate size.
The HOA shall maintain all areas within the project including street and lighting.
General Architectural Theme
This gated community will include a mixture of semi-custom and custom homes that
will include equestrian amenities. The project portrays the following themes: Anglo-
influenced Spanish Colonial; Italian Farmhouse style with the buildings blending with
natural surroundings; Contemporary Mexican drawn from modern architectural
styles; and, the Andalusian style depicting Moorish architecture. Earth tone stucco
colors, brick or stone facing, clay tile roofs, arches and courtyards will be accented
by a subtle equestrian theme (See Exhibits 31, 32, 33, 34 and 35).
As Adopted January 4, 2005 Page 41 of 62
Griffin Ranch Specific Plan City of La Quinta
TABLE 1
MASTER PLANT PALETTE
Botanical Name Common Name
Trees
Acacia smallii Sweet Acacia
Acacia salicina Willow Acacia
Acacia stenophylla Shoestring Acacia
Cercidium ‘Desert Musem’ Palo Verde
Cercidium floridum Blue Palo Verde
Cercidium praecox Sonoran Palo Verde
Chilopsis linearis Desert Willow
Citrus Citrus Tree
Eucalypus microtheca Coolibah
Ficus retusa ‘Nitida’ Indian Laurel Fig
Fraxinus uhdei ‘Majestic Beauty’ Evergreen Ash
Geijera parvifolia Australian Willow
Jacaranda mimosifolia Jacaranda
Lysiloma thornberi Feather Bush
Olea Europe ‘Wilsoni’ or ‘Swan Hill’ Olive
Prosopis glandulosa Texan Honey Mesquite
Quercus virginiana ‘Heritage’ Heritage Live Oak
Rhus lancea African Sumac
Schinus molle California Pepper
Thevetia peruviana Yellow Oleander
Palms
Brahea armata Mexican Blue Palm
Butia capitata Pindo Palm
Chamerops humilis Mediterranean Fan Palm
Cocos plumose Queen Palm
Cycas revoluta Sago Palm
Phoenix dactylifera Date Palm
Phoenix roebelenii Pigmy Date Palm
Washingtonia hybrid California Fan Palm
Shrubs
Bougainvillea ‘OO LA LA’ Shrub Bougainvillea
Buxus microphylla japonica Japanese Boxwood
Caesalpina gilliesii Mexican Bird of Paradise
Caesalpina pulcherrima Red Bird of Paradise
Callistemon viminalis ‘Little John’ Dwarf Weeping Bottlebrush
As Adopted January 4, 2005 Page 42 of 62
Griffin Ranch Specific Plan City of La Quinta
Carissa macrocarpa ‘boxwood beauty’ Natal Plum
Carissa macrocarpa ‘Tuttlei’ Natal Plum
Cassia nemophila Bushy Senna
Cassia phyllodenia Silver Leaf Cassia
Dodonea viscosa Hopseed Bush
Encelia farinosa Brittle Bush
Euryops p. ‘Viridis’ Green-leaf Euryops
Ilex vomitoria ‘Stokes’ Stokes Holly
Justicia spicigera Mexican Honeysuckle
Leucophyllum f. ‘Rio Bravo’ Texas Ranger
Leucophyllum f. ‘Sierra Banquet’ Texas Ranger
Ligustrum j. ‘Texanum’ Texas Privet
Myrtus communis ‘Compacta’ Dwarf Myrtle
Muhlenbergia lindheimeri ‘Regal Mist’ Deer Grass
Nandina domestica ‘Compacta’ Compact Heavenly Bamboo
Nandina domestica ‘Harbor Dwarf’ Dwarf Heavenly Bamboo
Nandina domestica ‘Nana’ Dwarf Heavenly Bamboo
Nerium oleander ‘Petite Pink’ Dwarf Oleander
Rhaphiolepis i. ‘Ballerina’ Indian Hawthorn
Rhaphiolepis i. ‘Springtime’ Indian Hawthorn
Photinia fraseri Fraser’s Photinia
Pittosporum tobira ‘Variegata’ Variegated Mock Orange
Pittosporum tobira ‘Wheeleri’ Dwarf Mock Orange
Salvia g. ‘Sierra Linda’ Red Sage
Salvia Leucantha Mexican Bush Sage
Thevetia peruviana Yellow Oleander
Xylosma congestum Shiny Xylosma
Xylosma c. ‘Compacta’ Dwarf Xylosma
Groundcover
Annual Color Seasonal Flowers
Acacia r. ‘Desert Carpet’ Trailing Acacia
Baccharis p. ‘Centennial’ Coyote Bush
Carissa macrocarpa ‘Green Carpet’ Natal Plum
Dalea greggii Prostrate Indigo Bush
Gazania ‘Mitsua Orange’ Gazania
Gazania ‘Mitsua Yellow’ Gazania
Gazania rigens leucolaena Trailing Gazania
Lantana montevedensis Purple Prostrate Lantana
Lantana m. ‘New Gold’ Yellow Prostrate Lantana
Rosmarinus o. ‘Lockwood de Forest’ Dwarf Rosemary
Santolina virens Green Santolina
Verbena peruviana Verbena
Verbena p. ‘Starfire’ Verbena
Verbena rigida Verbena
Espaliers & Vines
As Adopted January 4, 2005 Page 43 of 62
Griffin Ranch Specific Plan City of La Quinta
Bougainvillea ‘Barbara Karst’ Bougainvillea
Bougainvillea ‘Lavender Queen’ Bougainvillea
Calliandra inequilatera Pink Powder Puff
Ficus pumila Creeping Fig
Gelsemium sempervirens Carolina Jessamine
Macfadyena unguis-cati Cat’s Claw Vine
Tecomaria capensis Cape Honeysuckle
Accents
Agave Americana Century Plant
Aloe variegate Partridge Breast Aloe
Dasylirion wheeleri Desert Spoon
Hesperaloe parviflora Red Yucca
Yucca pendula Yucca
As Adopted January 4, 2005 Page 44 of 62
Griffin Ranch Specific Plan City of La Quinta
APPLICABLE GENERAL PLAN POLICIES
The General Plan of the City of La Quinta includes Goals, Policies and Programs
that were deemed by the City necessary to properly implement the plan.
Following is an evaluation of the key policies and programs (in Italics) that affect
the development of the subject property and project compliance.
LAND USE ELEMENT
Land Use Goals, Policies and Programs
Program 4.2 “For approved Specific Plans, the Director of Community
Development shall have the authority to determine substantial
conformance in a Specific Plan, and waive the need for a Specific
Plan amendment under the following circumstances:
• When changes in the land use allocation within the Specific Plan are less
than 5%,
• When no new land use is proposed,
• When off-site circulation pattern and turning movements will not be altered
by the proposed change.”
The Griffin Ranch Specific Plan provides methods for alterations to the Plan that
conform to the guidelines of the General Plan.
Policy 9: Agricultural and equestrian uses are encouraged.
The Griffin Ranch plan includes an 11 acre +/- site to accommodate equestrian
uses. The Plan also includes multi-purpose pedestrian trails.
Residential Goals, Policies and Programs
Goal 2: A broad range of housing types and choices for all residents of the City.
The Griffin Ranch Plan provides a choice of housing, equestrian oriented or
conventional single-family homes.
Program 1.2 Apply the City’s discretionary powers and site development review
process consistently to assure that subdivision and development
plans are compatible with existing residential areas
1
Griffin Ranch Specific Plan City of La Quinta
Policy 5 The City shall maintain residential development standards including
setbacks, height, pad elevations and other design and performance
standards that assure a high quality of development.
Program 5.1 The Development Code shall include development standards and
design guidelines for each residential zoning designation.
The Griffin Ranch Plan provides development standards consistent with
standards contained within the Development Code for lands designated Low
Density Residential and Very Low Density Residential w/Equestrian Overlay.
The homes will be subject to the City’s Site Development Permit process.
TRAFFIC AND CIRCULATION ELEMENT
Traffic and Circulation Goals, Policies and Programs
Program 2.3 On Major Arterials, the minimum intersection spacing shall be 2,600
feet in residential areas, and may be 1,060 feet for commercial
frontage. Intersection spacing may be reduced to 500 feet a the
Whitewater Channel and La Quinta Evacuation Channel. The
design speed shall be 60 miles per hour (mph). Left turn median
cuts may be authorized if turn pocket does not interfere with other
existing or planned left turn pockets. Right in/right out access
driveways shall exceed the following minimum separation distances
(in all cases, distances shall be measured between the curb
returns):
- more than 250 feet on the approach leg to a full turn intersection;
- more than 150 feet on the exit leg from a full turn intersection;
- more than 250 feet between driveways.
All access configurations shall be subject to City Engineer review
and approval.
Program 2.6 On Secondary Arterials, the minimum intersection spacing shall be
600 feet. The design speed shall be 40 mph. Full access to
adjoining property shall be avoided and when necessary shall
exceed the following minimum separation distances (in all cases,
distances shall be measured between curb returns):
- more than 250 feet on the approach leg to a full turn
intersection;
- more than 150 feet on the exit leg from a full turn intersection;
- more than 250 feet between driveways.
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Griffin Ranch Specific Plan City of La Quinta
Program 2.8 On Local streets, the minimum intersection spacing shall be 25 feet.
The design speed shall be 25 mph. All access configurations shall
be subject to City Engineer review and approval.
Program 2.10 Within subdivisions, private streets may be designed to a width of
28 feet with restricted parking, subject to City Engineer and Fire
Department approval.
Policy 6 Develop and encourage the use of continuous and convenient
bicycle routes and multi-use trails and development to places of
employment, recreation, shopping, schools, and other high activity
areas with potential for increased bicycle, equestrian, golf cart and
other non-vehicular use.
Program 6.3 Sidewalks shall be provided on both sides of all arterial and
collector streets, except where there is a multi-use trail on one side.
Policy 13 Continue to implement the Image Corridors in the City and identify
new image corridors for streets into the City through annexation.
Policy 14 In order to preserve the aesthetic values on the City’s street,
minimum landscape setbacks shall be as follows:
Highway 111 – 50 feet
Other Major Arterials & Primary Arterials: 20 feet
Secondary Arterials & Collector Streets: 10 feet
The Griffin Ranch Plan provides for controlled access to the perimeter streets.
The access points are in compliance with the policies on intersection spacing.
The Plan also provides for the construction of sidewalks and multi-use trails
around the perimeter adjacent to 54th Avenue and Madison Street.
OPEN SPACE ELEMENT
Open Space Element Goals Policies and Programs
Policy 4: The City shall develop and implement plans for linkages between
open space areas, parks, recreational facilities and cultural
resources.
The Griffin Ranch Plan will provide private recreational opportunities in addition
to payment of required park fees. The Plan will also provide linkages to the
City’s trails and bikeways.
Policy 7: The City shall encourage the preservation of open space in
privately owned development projects.
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Griffin Ranch Specific Plan City of La Quinta
The Griffin Ranch Plan includes private open space with passive and active
recreational opportunities.
Parks and Recreation Element
Parks and Recreation Element Goals, Policies and Programs
Policy 4: The City shall develop and implement plans for linkages between
open space areas, parks, recreational facilities and cultural
resources.
The Griffin Ranch Plan will provide private recreational opportunities in addition
to payment of required park fees. The Plan will provide linkages to the City’s
trails and bikeways along 54th Avenue and Madison Street.
Natural Resources Element
Air Quality Goals, Policies and Programs
Program 5.1: The City shall support the development of golf-cart and pedestrian
orientated retail centers, community-wide trails and dedicated bike
lanes.
The Griffin Ranch Plan is providing links to bicycle paths, community trails golf-
cart paths.
Program 6.1: Applicants shall submit detailed air quality analyses for all proposed
projects which meet or exceed any of the SCAQMD pollutant
emission threshold criteria, as established by the most recent
version of the SCAQMD CEQA Air Quality Handbook.
The Griffin Ranch Plan will abide by the SCAQMD requirements in the
development of the project.
Energy and Mineral Resources Goals, Polices and Programs
Program 3.2: The City shall support the development of local and regional
bikeways to provide residents and visitors with non-vehicular travel
alternatives.
The Griffin Ranch Plan is providing links to bicycle paths, community trails and
golf-cart paths.
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Griffin Ranch Specific Plan City of La Quinta
Biological Goals, Policies and Programs
Program 2.4: A qualified biologist shall perform all biological studies. The City
shall prepare and adopt standards for the performance of biological
resource analyses and provide these to all applications. Standards
shall include personnel qualifications; field monitoring, recordation,
documentation and sampling requirements.
A biological resource assessment was performed by JWC Ecological Services,
The results of which were negative for any endangered, threatened or rare
species.
Policy 3: Native, drought-tolerant desert plant materials shall be incorporated
into new development to the greatest extent practical. Invasive,
non-native species shall be discouraged.
The Griffin Ranch Plan has included in its Plant Palette drought-tolerant desert
plant materials as part of its landscaping design.
Water Resources Goals, Policies and Programs
Program 2.2: The City shall continue to implement, its on-site retention
requirements for new development proposals where possible as a
potential way or recharging groundwater.
The Griffin Ranch Plan proposes to retain on-site 100% containment of 100-year
storm flows and nuisance flows.
Policy 5: Development within drainage areas and storm water facilities shall
be limited to recreational uses such as golf courses, lakes, sports
or play fields and similar uses.
The Griffin Ranch Plan provides for passive and active recreation activities in
drainage and storm water areas within the project.
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Griffin Ranch Specific Plan City of La Quinta
INFRASTRUCTURE AND PUBLIC SERVICES ELEMENT
Infrastructure and Public Services Goals, Policies and Programs
Education Facilities Goal
Policy 3: The city shall support the process of securing school impact
mitigation fees from developers in accordance with State law.
The Griffin Ranch development will participate in the payment of mitigation fees
in accordance with State law.
Surface Water & Storm Drainage Goal
Policy 3: All new development shall include on-site retention/detention
basins and other necessary storm water management facilities to
accommodate run-off from the 100-year storm.
The Griffin Ranch Plan proposes to retain on-site containment of the 100-year
storm run-off.
Domestic Water Goal
Policy 3: New development projects shall be required to use native drought
tolerant landscaping materials to promote and enhance water
conservation efforts.
The Griffin Ranch Plan proposes to use native and drought tolerant plant
materials combined with efficient irrigation methods to promote water
conservation.
Public Utilities Goal
Policy 3: All utility and electric wires up to 34.5 kilovolts serving new
development shall be installed under ground.
Griffin Ranch proposes to underground utility services that are less than 34.5
kilovolts.
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Griffin Ranch Specific Plan City of La Quinta
ENVIRONMENTAL HAZARDS ELEMENT
Geologic and Seismic Hazards, Goals, Policies and Programs
Policy 3: Development in areas subject to collapsible or expansive soils shall
be required to conduct soil sampling and laboratory testing and to
implement mitigation measures, which minimize such hazards.
A Soils and Geotechnical investigation was performed by Sladden Engineering.
Construction shall conform to the recommended measures and standards
construction practices.
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Griffin Ranch Specific Plan City of La Quinta
DEFINITIONS
Abandoned” means a structure or use, the development or operation of
which has been ceased or suspended.
“Abutting” or “adjacent” means two or more parcels sharing a common
boundary at one or more points.
“Access/egress” means provision for entering a site from a roadway and
exiting a site onto a roadway via motorized vehicle.
“Accessory building or structure” means a building or structure, the use of
which is subordinate and incidental to the main building or use on the same
building site.
“Accessory use” means a land use subordinate and incidental to the
principal use on the same building site.
“Actual construction” means the actual placing of construction materials in
their permanent position fastened in a permanent manner except that where a
basement is being excavated, such excavation shall be deemed to be actual
construction, or where demolishing or removal of an existing building or structure
has begun, such demolition or removal shall be deemed to be actual
construction, providing in all cases that actual construction work be diligently
carried on until the completion of the entire building or structure involved.
“Administrative office” means a place of business for the rendering of
service or general administration, but not including retail sales.
Advertising Device or Display”. See sign definitions, Section 9.160.120.
“Alley” means a secondary means of access to abutting property located
at the rear or side of the property.
“Alteration” means any physical change in the internal or external
composition of a building or other structure.
“Antenna” means a device for transmitting or receiving radio, television,
satellite, microwave or any other transmitted signal.
Area, Project Net. See “project net area.”
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Griffin Ranch Specific Plan City of La Quinta
“Attached structures” means two or more structures which are physically
connected with a wall, roof, deck, floor, bearing or support structures, trellises,
architectural features or any other structure, fixture or device that exceeds thirty
inches in height above the finished grade.
“Awning” means a roof-like cover that is attached to and projects
from the wall of a building for the purpose of decoration and/or providing
shielding from the elements.
“Bedroom” means any habitable room that may be used for sleeping
purposes other than a kitchen, bathroom, hallway, dining room or living room.
“Berm” means a mound or embankment of earth.
“Buildable area” means the portion of a building site remaining after
deducting all required setbacks and meeting any requirements regarding
maximum lot coverage or minimum open area.
“Building” means an enclosed structure having a roof supported by
columns or walls.
“Building height” means the height of a building relative to the surrounding
ground area. Measurement of maximum building height is defined in Sections
9.50.050 and 9.90.010 of La Quinta Municipal Code.
Building, Main. “Main building” means the building containing the main or
principal use of the premises.
“Building site” means a parcel or contiguous parcels of land established in
compliance with the development standards for the applicable zoning district and
the city's subdivision code.
“Building site area” means the horizontal area within a building site
expressed in square feet, acres or other area measurement.
Building Site Coverage. See “lot coverage.”
Building Site, Panhandle or Flag. See “lot” definitions.
Building Site, Through. “Through building site” means a building site
having frontage on two parallel or approximately parallel streets. See “through
lot.”
“CEQA” means the California Environmental Quality Act.
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Griffin Ranch Specific Plan City of La Quinta
“Caretaker” means a person who lives on the premises for the purposes of
managing, operating, maintaining or guarding the principal use or uses permitted
on the premises.
“Carport” means a roofed structure or a portion of a building which is open
on two or more sides for the parking of automobiles belonging to the occupants
of the property.
“Certificate of occupancy” or “certificate of use and occupancy” means a
permit issued by the city prior to occupancy of a structure or the establishment of
a land use to assure that the structure or parcel is ready for occupancy or use
and that all ordinance requirements and project conditions of approval are
fulfilled.
“City” means the city of La Quinta.
“City council” means the City Council of the city of La Quinta.
“Code” means this zoning code unless another code, ordinance or law is
specified.
“Commission” means the planning commission of the city unless another
commission is indicated.
Corner Lot. See definitions under “lot.”
“County” means the county of Riverside unless another county is
indicated.
“Decision-making authority” or “decision-making body” means a person or
group of persons charged with making decisions on proposals, applications, or
other items brought before the city.
“Density” means the number of dwelling units per gross acre, unless
another area measurement is specified.
“Detached building or structure” means a building or other structure that
does not have a wall or roof in common with any other building or structure.
“Director” or “community development director” means the community
development director of the city or the director's authorized agent or
representative.
“Driveway” means a vehicular passageway providing access from a public
or private street to a structure or parking area or, in the case of residences, to a
garage, carport, or legal parking space. A driveway is not a street.
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Griffin Ranch Specific Plan City of La Quinta
“Driveway approach” means a designated area between the curb or
traveled way of a street and the street right-of-way line that provides vehicular
access to abutting properties. When vehicular access to a building site is
provided by way of a common driveway, the driveway approach is the line of
intersection where the individual driveway abuts the common driveway.
“Dwelling” means a building or portion thereof designed and used for
residential occupancy, but not including hotels or motels.
“Dwelling, Main or Primary Residence.” Main dwelling or primary
residence” means the dwelling unit permitted as the principal use of a parcel or
building site.
Dwelling, Single-Family. “Single-family dwelling” means one main dwelling
unit on a single parcel or building site.
Dwelling Unit, Second. See “second residential unit.”
“Easement” means a recorded right or interest in the land of another which
entitles the holder thereof to some use, privilege or benefit in, on, over or under
such land.
“Elevation” means the vertical distance above sea level.
“Employee's quarters” means quarters, without cooking facilities, for the
housing of domestic employees and located upon the same building site
occupied by their employer.
“Enclosed” means roofed and contained on all sides by walls which are
pierced only by windows, vents or customary entrances and exits.
“Exception” means a city-approved deviation from a development
standard based on the following types of findings by the decision-making
authority:
1. A general finding such as that notwithstanding the exception, the
resulting project will still be consistent with the goals and/or policies underlying
the development standard; and
2. One or more specific findings justifying the particular exception
requested.
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Griffin Ranch Specific Plan City of La Quinta
“Family” means one or more persons occupying one dwelling unit. The
word “family'' includes the occupants of congregate living and residential care
facilities, as defined herein, serving six or fewer persons which are permitted or
licensed by the state.
Flag. See sign definitions, Section 9.160.120.
Flag Lot or Panhandle Lot. See definitions under “lot.”
“Flood insurance rate map (FIRM)” or “flood boundary and floodway map”
mean the official maps provided by the Federal Emergency Management Agency
(FEMA) which delineate the areas of special flood hazard, the risk premium
zones and the floodways applicable to the city.
Floor Area, Gross. See “gross floor area.”
Floor Area, Livable. See “livable floor area.”
Front Lot Line. See definitions under “lot line.”
“Garage” means a building or portion of a building used primarily for the
parking of motor vehicles.
“General plan” means the general plan of the city of La Quinta.
“Government code” means the California Government Code.
Grade, Average. “Average grade” means the elevation determined by
averaging the highest and lowest elevations of a parcel, building site or other
defined area of land.
Grade, Average Finish. “Average finish grade” means the elevation
determined by averaging the highest and lowest elevations of a parcel, building
site or other defined area of land after final grading.
Grade, Finish. “Finish grade” means the ground elevation at any point
after final grading.
“Grading” means the filling, excavation or other movement of earth for any
purpose.
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Griffin Ranch Specific Plan City of La Quinta
“Granny flat or granny housing” means a secondary dwelling unit which is:
(1) intended for the sole occupancy of one or two adult persons sixty-two years of
age or over, and (2) located on a building site containing an existing single family
detached dwelling. The floor area of an attached granny flat does not exceed
thirty percent of the existing floor area of the primary single family residence and
the floor area of a detached granny flat does not exceed one thousand two
hundred square feet. (See also “second residential unit.”)
“Gross acreage” means the land area, expressed in acres, within a parcel
or group of contiguous parcels minus any right-of-way for arterial highways not
including collector streets. Each acre so determined is a gross acre.
Gross Density. See “density.”
“Gross floor area” means the total square footage of all floors of a building,
including the exterior unfinished wall structure but excluding courtyards and other
outdoor areas.
Gross Lot or Parcel Area. See “lot area, gross.”
“Ground floor area” means all enclosed area within the ground floor of a
structure, including exterior walls and mechanical spaces. Carports, garages,
accessory buildings and parking structures are included in ground floor area but
swimming pools and unenclosed post-supported roofs over patios and walkways
are not included.
“Guest house” means a detached unit which has sleeping and sanitary
facilities but no cooking facilities and which is used primarily for sleeping
purposes by members of the family occupying the main building, their nonpaying
guests, and domestic employees.
Habitable Area. See “livable floor area.”
“Habitable room” means any room usable for living purposes, which
includes working, sleeping, eating, cooking or recreation, or a combination
thereof. A room designed and used only for storage purposes is not a habitable
room.
“Home occupation” means an occupation or activity conducted as an
accessory use within a dwelling unit incidental to the residential use of the
property. See Section 9.60.110.
Interior Lot Line. See definitions under “lot line.”
“Kitchen” means any room all or part of which is designed and/or used for
the cooking or other preparation of food.
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Griffin Ranch Specific Plan City of La Quinta
Land Use. See “use.”
Land Use Intensity. See “intensity.”
“Livable floor area” means the interior area of a dwelling unit which may
be occupied for living purposes by humans, including basements and attics (if
permitted). Livable floor area does not include a garage or any accessory
structure.
Living Area. See “livable floor area.”
“Lot” means an area of land under one ownership which is identified as a
lot or parcel on a recorded final map, parcel map, record of survey recorded
pursuant to an approved division of land, certificate of compliance, or lot line
adjustment. The terms “lot” and “parcel” are interchangeable for purposes of this
code. Types of lots and their definitions are as follows:
1. “Corner lot” means a lot abutting two streets intersecting at an
angle of not more than one hundred thirty-five degrees. If the angle of
intersection is more than one hundred thirty-five degrees, the lot is an “interior
lot.”
2. “Flag or panhandle lot” means a lot connected to the street with a
narrow access portion less than forty feet wide and more than twenty feet long
and situated so that another lot is located between the main portion of the flag lot
and the street.
3. “Interior lot” means a lot abutting only one street or abutting two
streets which intersect at an angle greater than one hundred thirty-five degrees.
4. “Key lot” means a lot with a side lot line that abuts the rear lot line
of one or more adjoining lots.
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Griffin Ranch Specific Plan City of La Quinta
5. “Reverse corner lot” means a corner lot, the rear of which abuts the
side of another lot.
6. “Through lot” means a lot with frontage on two parallel or
approximately parallel streets.
“Lot area” means the horizontal land area within a lot expressed in square
feet, acres, or other area measurement.
“Lot coverage” or “building site coverage” means the cumulative ground
floor area of the structures on a lot expressed as a percentage of the net lot area.
For purposes of this definition, “ground floor area” means all enclosed area within
the ground floor of a structure, including exterior walls and mechanical spaces.
Carports, garages, accessory buildings and parking structures are included in
ground floor area but swimming pools and unenclosed post-supported roofs over
patios and walkways are not included.
“Lot frontage” means the length of the front lot line.
“Lot line or property line” means any boundary of a lot. The classifications
of lot lines and their definitions are as follows:
1. “Front lot line” means the following:
a. On an interior lot, the line separating the lot from the street as
measured at the setback line;
b. On a corner lot, the shorter line abutting a street. (If the lot lines are
equal or approximately equal, the director shall determine the front lot line);
c. On a through lot, the lot line abutting the street providing primary
access to the lot.
2. “Interior lot line” means any lot line not abutting a street.
3. “Rear lot line” means a lot line which does not intersect the front lot
line and which is most distant from and most parallel to the front lot line. In the
case of an irregularly-shaped lot or a lot bounded by only three lot lines, the rear
lot line is a ten-foot long line parallel to and most distant from the front lot line for
the purposes of determining setbacks and other provisions of this code.
4. “Side lot line” means any lot line which is not a front or rear lot line.
“Median” means a paved or planted area separating a street or highway
into opposite-direction travel lanes.
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Griffin Ranch Specific Plan City of La Quinta
Monument Sign. See sign definitions, Section 9.160.120.
“Net site area” or “net lot area” means the total land area within the
boundaries of a parcel or building site after ultimate street rights-of-way and
easements that prohibit the surface use of the site are deducted.
“Net project area” means all of the land area included within a
development project excepting those areas with before-development slopes of
thirty percent or steeper and those areas designated for public and private road
rights-of-way, schools, public parks, and other uses or easements which
preclude the use of the land therein as part of the development project.
“Nonconforming use” means a land use which was lawful and in
conformance with the applicable zoning ordinances when established but which,
due to subsequent ordinance changes, is not currently permitted in the zoning
district in which it is located or is permitted only upon the approval of a use permit
and no use permit has been approved. See Chapter 9.270.
“Nonconforming structure” means a structure which was lawful and in
conformance with the applicable zoning ordinances when constructed but which,
due to subsequent ordinance changes, does not conform to the current
development standards applicable to the zoning district in which it is located. See
Chapter 9.270.
“Open space” means any parcel or area of land or water, public or private,
which is reserved for the purpose of preserving natural resources, for the
protection of valuable environmental features, or for providing outdoor recreation
or education. Open space does not include roads, driveways or parking areas not
related to recreational uses, any buildings.
Open Space, Usable. “Usable open space” means open space which is
predominately level (i.e., slopes less than five percent) but which may contain
some steeper land (i.e., with slopes up to twenty percent) which has utility for
picnicking or passive recreation activities and which complements surrounding
usable open space. Usable open space is a minimum of fifteen feet in width and
three hundred square feet in area and may include structures and impervious
surfaces such as tot lots, swimming pools, basketball courts, tennis courts, picnic
facilities, walkways or bicycle trails.
“Parcel” means an area of land under one ownership which is identified as
a lot or parcel on a recorded final map, parcel map, record of survey recorded
pursuant to an approved division of land, certificate of compliance or lot line
adjustment. The terms “lot” and “parcel” are interchangeable for purposes of this
code.
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Griffin Ranch Specific Plan City of La Quinta
Panhandle Lot or Flag Lot. See definitions under “lot.”
“Parkway” means the area of a public street that lies between the curb and
the adjacent property line or physical boundary, such as a fence or wall, which is
used for landscaping and/or passive open space.
Primary Residence. See “main dwelling.”
“Principal use” means the primary or predominant use of any parcel,
building site or structure.
“Property line” means a lot line or parcel boundary.
“Public agency” means the United States, the state, the county or any city
within the county, or any political subdivision or agency thereof.
Rear Lot Line. See definitions under “lot line.”
“Recycling” means the process by which waste products are reduced to
raw materials and transformed into new products.
Residential, Single-Family. See “dwelling, single-family.”
“Restaurant” means any use providing for the preparation and
consumption on site of food and beverages. The term “restaurant” may include
the licensed sale of alcoholic beverages for consumption on the premises.
“Riding and hiking trail” means a trail or way designed for and used by
equestrians, pedestrians and cyclists using nonmotorized bicycles.
“Right-of-way” means the entire width of property used for streets,
highways, flood or drainage works, overhead or underground utilities, or any
related improvements.
“Satellite dish antenna” means an apparatus capable of receiving
communications from a man-made satellite.
“Scenic highway” means any highway designated a scenic and/or historic
highway by an agency of the city, state or federal government.
“Second residential unit,” “second dwelling unit” or “second unit” means a
secondary dwelling unit which is not intended for sale but may be rented and
which is located on a building site containing a preexisting single-family detached
dwelling. The floor area of an attached second unit does not exceed thirty
percent of the existing floor area of the primary single-family residence and the
As Adopted January 4,2005 10
Griffin Ranch Specific Plan City of La Quinta
floor area of a detached second unit does not exceed one thousand two hundred
square feet. (See also “granny flat.”)
“Senior citizen” means a person fifty-five years of age or older.
“Setback” means the distance that a building or other structure or a
parking lot or other facility must be located from a lot line, property line or other
specified boundary.
Side Lot Line. See definitions under “lot line.”
“Sign” means any medium for visual communication, including but not
limited to words, symbols and illustrations together with all parts, materials, frame
and background, which medium is used or intended to be used to attract
attention to, identify, or advertise an establishment, product, service, activity or
location, or to provide information. Also, see sign definitions, Section 9.160.120.
Single-Family Dwelling or Residence. See “dwelling, single-family.”
Site. See “building site.”
Site Area, Net. See “net project or site area.”
Site Coverage. See “building site coverage.”
Site Development Permit or Development Permit. See Section 9.210.010.
“Slope” or “slope gradient” means the vertical distance between two points
on a slope divided by the horizontal distance between the same two points, with
the result expressed as a percentage; e.g., “the slope has a twenty percent
gradient” (usually used to describe natural as opposed to manufactured, slopes).
“Slope ratio” means the steepness of a slope expressed as a ratio of
horizontal distance to the vertical rise over that horizontal distance; e.g., 2:1
(usually used to describe manufactured as opposed to natural, slopes).
“Specific plan” means a plan consisting of text, maps and other
documents and exhibits regulating development within a defined area of the city,
consistent with the general plan and State Government Code Section 65450 et
seq.
“Storage” means a place where goods, materials, and/or personal
property is placed for more than twenty-four hours.
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“Story” means that portion of a building included between the surface of
any floor and the surface of the floor immediately above it or if there is no floor
above, then the space between the floor and the ceiling above it.
“Street” means a public or private vehicular right-of-way other than an
alley or driveway, including both local streets and arterial highways.
“Structure” means anything that is erected or constructed having a fixed
location on the ground or attachment to something on the ground and which
extends more than thirty inches above the finish grade. A mobilehome or
relocatable building, except when used as a temporary use with its weight resting
at least partially upon its tires, is a structure for the purposes of this definition.
“Swimming pool” means an artificial body of water having a depth in
excess of eighteen inches, designed, constructed and used for swimming,
dipping or immersion purposes by humans.
“Ultimate right-of-way” means the right-of-way shown as ultimate on
an adopted precise plan of highway alignment or the street right-of-way shown
within the boundary of a recorded tract map, a recorded parcel map or a
recorded planned community development plan. The latest adopted or recorded
document in such cases shall take precedence. If none of these exist, the
ultimate right-of-way is the right-of-way required by the highway classification as
shown in the general plan.
“Use or land use” means the purpose for which a structure or land is
occupied, arranged, designed or intended, or for which either a structure or land
is or may be occupied or maintained.
“Use permit” means a discretionary entitlement under the provisions of this
zoning code which authorizes a specific use or development on a specific
property subject to compliance with all terms and conditions imposed on the
entitlement. Uses requiring a conditional use permit have moderate to significant
potential for adverse impacts on surrounding properties, or residents while uses
requiring a minor use permit have low to moderate potential for adverse impacts
on surrounding properties, residents, or businesses. See Section 9.210.020.
Wall Sign. See “building-mounted sign” in sign definitions, Section
9.160.120.
“Yard” means an open space on a parcel of land or building site
unobstructed and unoccupied from the ground upward except for wall projections
permitted by this code. Yards are classified as follows:
1. Front yard means a yard extending across the full width of the lot
between the front lot line or the ultimate street right-of-way line and
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Griffin Ranch Specific Plan City of La Quinta
a setback line within the lot. The depth of the front yard is
measured along a line drawn at a ninety-degree angle to whichever
of the following results in the greatest setback; the front lot line or
its tangent or the ultimate street right-of-way or its tangent.
2. “Rear yard” means a yard extending across the full width of the lot
between the rear lot line and a setback line within the lot. The depth of the rear
yard is equal to the setback established in the development standards for the
applicable zoning district and is measured along a line drawn at a 90-degree
angle to whichever of the following results in the greatest setback: the rear lot
line or its tangent or the ultimate street right-of-way or its tangent.
3. “Side yard” means a yard extending from the front setback line to
the rear setback line. The depth of the side yard is equal to the setback
established in the development standards for the applicable zoning district and is
measured along a line drawn at a ninety-degree angle to whichever of the
following results in the greatest setback: the side lot line or its tangent or the
ultimate street right-of-way or its tangent.
As Adopted January 4,2005 13
Griffin Ranch Specific Plan City of La Quinta
La Quinta Municipal Code
Section 9.140.060
Equestrian Overlay Regulations
A. Applicability. The EOD equestrian overlay district regulations set forth in this section
shall apply to all areas of the city containing the “EOD” overlay designation on the
official zoning map. These regulations shall apply in addition to the regulations of the
underlying base district. In case of conflict between the base district and the EOD
regulations, the EOD regulations shall control.
B. Definitions. The following definitions apply in the equestrian overlay district:
1. “Accessory building” means any building subordinate to a
permitted or conditionally permitted equestrian use, including but not
limited to hay and tack barns, stables and other structures and uses
customarily appurtenant to the primary permitted use.
2. “Accessory structure” means any structure subordinate to a permitted or
conditionally permitted equestrian use, including but not limited to arenas,
grandstand seating, corrals, exercise rings, and other structures associated
with the permitted use. Fences are not considered structures for the
purposes of this section.
3. “Arena” means an enclosure physically similar to a corral, designed and
constructed so as to be used for conducting equine-related entertainment
and events open to the public, including but not limited to rodeos, polo
matches, riding shows and exhibitions, etc.
4. “Commercial stable” means any facility specifically designed or used
for the stabling of equine animals not owned by the residents of the
subject property, for purposes such as on-site breeding, boarding, training,
riding or other recreational use as a commercial service to the owners of
said animals.
5. “Corral” means an enclosure designed for use as an open holding area
for horses for the purpose of confinement within that area for an
indeterminate period of time.
6. “Pasture” means an enclosed holding area consisting of grass or similar
vegetation, specifically used for purposes of grazing or feeding of animals.
7. “Riding academy” means a facility designed and used primarily for
recreational riding, training and instruction purposes, and allowing both
on-site boarding or trailering of horses to the facility.
1
Griffin Ranch Specific Plan City of La Quinta
8. “Stable” means a building or structure containing multiple stalls for the
purposes of sheltering, feeding, boarding, accommodating or otherwise
caring for several horses at one time.
9. “Stall” means a division of a stable accommodating one horse into an
adequately sized enclosure for the purpose of confining individual horses
within a sheltered environment as may be necessary for security, safety or
other reasons pertinent to the health, welfare and daily care of each
animal.
C. Principal Uses. Principal uses permitted in the equestrian overlay district shall be as
follows:
1. Any use permitted, either expressly or by conditional use permit, in the
underlying zone;
2. The keeping of horses (including ponies or llamas) for personal use of
the residents of the property only, not to include any activities beyond that
necessary to continue the residents personal use. This may include limited
breeding and boarding activities of a non-compensatory nature, such as for
other family members personal use. Up to two horses shall be allowed on
a minimum one acre parcel. For parcels in excess of one acre, up to three
horses per additional acre or portion thereof, shall be allowed. Foals under
one year of age shall not be counted in the maximum number of horses
permitted;
3. Accessory buildings and structures, including stables, corrals, barns,
tack rooms, exercise rings, hay barns and other buildings and structures
customarily appurtenant to a permitted use;
4. Farm projects (Future Farms, 4-H or similar projects) conducted by the
residents of the premises. Such projects shall involve only the permitted
type and number of animals by this title being trained in connection with
the education of a person as a member of a recognized farm education
organization;
5. Caretakers and employee housing for on-site employment; providing
that the unit does not exceed one thousand square feet and conforms to the
setbacks in the underlying zone.
D. Conditional Uses. The following uses are permitted if a conditional use permit is
approved per Chapter 9.210.020:
1. Commercial stables and riding academies, as defined in this section.
2
Griffin Ranch Specific Plan City of La Quinta
2. Arenas for the purpose of conducting events such as rodeos and other
equestrian-oriented entertainment.
3. Veterinary offices or hospitals, when established on the same parcel as
the principal residence; provided, that only temporary boarding facilities
may be established for purposes of boarding sick or injured animals, and
that animals not permitted in the underlying zone may not remain at the
facility.
E. Development Standards. The following development standards generally apply to all
properties in the equestrian overlay district. Commercial equestrian facilities/uses may be
subject to more restrictive requirements through the conditional use process.
1. All accessory buildings shall be limited to two stories in height and a
maximum of thirty-five feet, measured from finish grade of the pad.
2. The following minimum setback requirements shall apply:
a. Pastures shall not require any setback. However, if a pasture does not
extend to a property line, a minimum ten-foot setback from property line
shall be provided.
b. Accessory buildings (barns, stalls, etc.) shall maintain twenty-five feet
from non-overlay property lines and ten feet from overlay property lines.
c. Accessory structures shall maintain thirty-five feet from any non-
overlay properties. A ten-foot setback from adjacent overlay property lines
shall be maintained.
d. Arenas shall be reviewed for appropriate setback and design as part of
the conditional use permit process, as they are not considered accessory
uses to residential equestrian. Generally, arenas shall maintain a minimum
seventy-five-foot setback from any property line.
e. Manure storage containers shall be set back a minimum of fifty feet
from any non-overlay property line and twenty feet from other property
lines.
f. Manure spreading areas shall not be established within twenty-five feet
of any property line.
g. No accessory building, use or operation described in this subdivision
shall be established or conducted within eighty feet of any residential
structure.
3
Griffin Ranch Specific Plan City of La Quinta
3. Fencing.
a. Pasture and corral areas, as well as all open areas abutting nonequestrian
properties, shall consist of fencing at least five feet high and of such
construction as to confine the animals. Fences which are on property lines
or are adjoining and running parallel to private streets or bridle trails, shall
be three-rail, with a minimum height of five feet from grade, and posts
spaced not more than ten feet apart. All posts shall be nominal four inches
by nominal six inches minimum, with nominal two inch by nominal six
inch minimum rails. This section shall not apply to property lines along
any street identified and shown on the circulation element of the general
plan, where specific sound attenuation is necessary based on an approved
acoustic study prepared for a subdivision map.
b. Fencing requirements of this section shall take precedence in the event
of any conflicts with the provisions of Section 9.060.030 (Fences and
walls), for properties keeping horses within the equestrian overlay district.
4. Dust Control. Corrals, stables, exercise rings and arenas, and any other
disturbed soil area shall be regularly sprinklered or otherwise treated to a
degree so as to prevent the emanation of dust, and in addition, all
accumulation of manure, mud or refuse shall be eliminated so as to
prevent the breeding of flies. Any open areas shall be subject to the
requirements of Chapter 6.16 whenever applicable. All nuisance water
runoff must be detained on the subject property.
5. Manure Collection. Removal and treatment of manure must occur on a
regular basis so as to promote the health, safety and welfare of residents
and visitors to the area in accordance with the following standards:
a. Stalls shall be cleaned on a daily basis. Straw, hay, sawdust or other
bedding materials may be stored or composted for later disposal, but shall
not be spread with manure over open areas.
b. Manure shall be collected from all source areas daily and may be stored
for later disposal in an enclosed container of adequate size. Open manure
stockpiles are not permitted. Manure stored for disposal shall be removed
from the property within seven days.
c. Manure to be used for composting purposes shall be placed in an
appropriately designed composting bin in order to properly decompose
and eliminate parasites. Only composted manure may be used in any
spreading operation.
d. Spreading of manure may only occur in conjunction with commercial
equestrian uses, and must be conducted over an adequately sized area
4
Griffin Ranch Specific Plan City of La Quinta
capable of assimilating the nutrients in the spread material. Such an area
may only be operated as part of overall disposal and treatment program
approved by the city or established as part of a conditional use permit
application.
e. Method for removal of manure from the property is at the owner’s
discretion. Off-site delivery to agricultural or related operations for
fertilizer use is permitted. On-site use of composted material is permitted
in new or established vegetated areas, such as gardens, landscaping,
reestablishment of pasture vegetation, etc.
f. Any condition that results in odors, unsightly areas or infestation shall
be deemed a public nuisance and/or health hazard and shall be abated
within seven days of proper notice. All violations are subject to
enforcement provisions of the La Quinta Municipal Code and applicable
county health codes.
6. Parking. Parking shall be provided as required by Chapter 9.150, and shall be
based upon the overall use of the property or as required by an approved
conditional use permit.
7. Lighting. Any proposed lighting must comply with Sections 9.60.160 and
9.100.150 (Outdoor lighting). Lighting of equestrian and related activity areas
shall not occur beyond ten p.m. unless otherwise specified by an approved
conditional use permit. This restriction does not pertain to general area and yard
lighting associated with a primary residential use on equestrian property.
8. Loudspeakers. Loudspeaker systems or other amplified sound are limited to
operation or use between eight a.m. and ten p.m. unless otherwise specified by an
approved conditional use permit.
F. Review and Approval Process. Equestrian uses, buildings and structures shall be
reviewed in accordance with the following procedures:
1. Accessory buildings, detached or attached, as defined in this section:
a. Up to four hundred square feet for each building or structure, to be
reviewed with the building permit application for approval by the
community development director;
b. Over four hundred square feet to be reviewed through the site
development permit procedures of Section 9.210.010, by the planning
commission.
2. All other permitted buildings are subject to the process identified for the
underlying base district and this section.
5
Griffin Ranch Specific Plan City of La Quinta
3. Conditional Use Permits.
a. Conditional uses shall be required to obtain a conditional use permit in
accordance with the procedures outlined in Chapters 9.200 (General
Permitting Procedures) and 9.210 (Development Review Permits). All
uses, buildings and structures identified in subsection D of this section
existing prior to the effective date of the ordinance codified in this section
shall be considered as nonconformities in accordance with Chapter 9.270
(Nonconformities). Property owners of all such uses, structures and
buildings shall file a site plan for the entire facility with the community
development department within thirty days of the effective date of the
ordinance codified in this section.
b. In addition to information required for a conditional use permit
application filed pursuant to Chapter 9.210, the following information
shall be submitted for conditional uses proposed in the EOD overlay
district:
i. A proposed program for storage, treatment and removal of
manure produced by the operation.
ii. A fugitive dust control plan, as required by Chapter 6.16 of the
La Quinta Municipal Code, addressing control of dust and
identification of all potential dust sources.
iii. Proposed or potential tentative scheduling of any events or
other activities which may produce impacts beyond the scope of
the proposed uses routine operations. (Ord. 284 § 1 (Exh. A) (part),
1996)
6
Potentially Less Than Less Than No
Signifaeant Significant w/ Significant Impact
Impact Mitigation Impact
XV. TRANSPORTATION!fRAFFIC --
Would the project:
a) Cause an increase in traffic which is X
substantial in relation to the existing
traffic load and capacity of the street
system (i.e., result in a substantial
increase in either the number of vehicle
trips, the volume to capacity ratio on
roads, or congestion at intersections)?
("Traffic Impact Study," Endo Engineering,
September 2004)
b) Exceed, either individually or X
cumulatively, a level of service standard
established by the county congestion
management agency for designated roads
or highways? ("Traffic Impact Study," Endo :
Engineering, September 2004)
c) Result in a change in air traffic X
patterns, including either an increase in
traffic levels or a change in location that
results in substantial safety risks? (No air
traffic involved in project)
d) Substantially increase hazards due to a X
design feature (e.g., sharp curves or
dangerous intersections) or incompatible
uses (e.g., farm equipment)? (Tract Map
32879)
e) Result in inadequate emergency X
access? (Tract Map 32879)
f) Result in inadequate parking capacity? X
(Tract Map 32879)
g) Conflict with adopted policies, plans, X
or programs supporting alternative
transportation (e.g., bus turnouts, bicycle
racks)? (Project description)
-27-
XV. a)-g) A traffic Impact Analysis was prepared for the proposed project6• The study analysed both
project traffic, and the portion of the requested General Plan Amendment to reduce the
street classification of Madison Street from a Major Arterial to a Primary Arterial. The
study found that the proposed project will generate approximately 2,900 average daily
trips (ADT), of which 223 would be during the morning peak hour, and 292 during the
evening peak hour. The study also found that with development of the project site, and
surrounding development, studied intersections will operate within the City's established
levels of service.
In order to assure that project impacts are adequately mitigated, the study includes several
mitigation measures, which are summarized below.
1. Madison and A venue 54 shall be improved to their buildout half-width with
development of the proposed project.
2. A Class II bikeway and golf cart path shall be located on Madison and A venue 54.
3. A left turn pocket shall be constructed in the median on Madison Street at the
project entry to allow for deceleration.
4. Lane geometries shall be as shown on Exhibit 5.1 of the traffic study.
5. The project proponent shall contribute their fair share to signalization of Jefferson
Street and Avenue 54, Madison Street and Avenue 54 and Monroe Street and
Avenue 54.
The proposed project includes a General Plan Amendment which will reduce the road
classification, and associated cross-section for Madison Street from its current Major
Arterial (6 lanes, divided), to a Primary Arterial (4lanes, divided). The potential impacts
associated with this General Plan were studied in a traffic analysis performed separately
from the above-referenced project analysis 7• The focus of the analysis was to determine
whether Madison Street had been "over-designed" in the General Plan, and whether the 6
lanes were necessary to accommodate existing plus projected traffic at buildout of the
General Plan, given the development which has occurred in this area of the City. The
analysis found that the approved projects in this area, which are under construction, will
generate 22,560 fewer daily trips than that analyzed in the General Plan. The analysis
further found that approximately 50% of these trips will travel on Madison Street.
Therefore, the potential trips on Madison Street will be reduced from the General Plan
assumption of 41,300-43,700 (depending on location) to 30,020 to 32,420 (also
depending on location). The capacity of a 6 lane divided roadway is 57,000 daily trips,
while the capacity of a 4 lane divided roadway is 38,000 daily trips. Since the actual
development affecting Madison Street will reduce the trip generation to 32,420 or less,
the Primary Arterial classification and cross section are acceptable to carry the buildout
traffic, and the proposed General Plan Amendment will have less than significant impacts
on traffic and circulation at General Plan buildout.
6 "Griffm Ranch Specific Plan and Vesting Tentative Map 32879 Traffic Impact Study," prepared by Endo
Engineering, September 2004
7 Letter report, dated November 12,2004, by Endo Engineering, titled "Evaluation of the Madison Street Planned
Classification."
-28-
-
The project does not include inadequate parking or unsafe designs. The site is located
· within the service area of SunLine Transit, and can be served by it. With implementation
of these mitigation measures, overall impacts to traffic are expected to be reduced to a
less than significant level.
-29-
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix B – CalEEMod Annual Emissions Report –
20 Lots
TTM No. 38083 Addendum - 20 Lots
Riverside-Salton Sea County, Annual
Project Characteristics - This model run applies to the currently mapped condition involving 20 one-acre lots. The subdivision of 20 lots into 37 lots will be
reflected in a separate model run to determine the quantitative emissions differences. For analysis purposes, the assumed start of construction date is
approximately three months from the date of this analysis.
Land Use - The current tract map condition includes 20 lots totaling approximately 19.55 acres plus areas for interior road improvements and open space
(categorized as other asphalt surfaces). Population estimates are based on the May 2021 CDF household estimate of 2.60 PPH.
Construction Phase - Default construction time frames are accepted. No structural demolition phase would be involved.
Architectural Coating - SCAQMD Rule 1113 would apply toward the VOC limits in architectural coatings.
Area Coating - SCAMQD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - SCAMQD Rule 403/403.1 and LQ Municipal COde would apply through a requirement of dust control measures.
This is not a form of mitigation for the Coachella Valley.
Mobile Land Use Mitigation -
Area Mitigation - SCAQMD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 20.00 Dwelling Unit 19.55 36,000.00 52
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Nonresidential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Nonresidential_Interior 250.00 50.00
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 20
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 6.49 19.55
tblLandUse Population 57.00 52.00
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 2 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.2832 2.5413 2.5463 5.2500e-
003
0.3678 0.1179 0.4857 0.1437 0.1102 0.2539 0.0000 464.4891 464.4891 0.0932 0.0105 469.9376
2023 0.3322 1.4984 1.8700 3.7800e-
003
0.0970 0.0682 0.1653 0.0262 0.0641 0.0903 0.0000 334.6318 334.6318 0.0572 8.9200e-
003
338.7203
Maximum 0.3322 2.5413 2.5463 5.2500e-
003
0.3678 0.1179 0.4857 0.1437 0.1102 0.2539 0.0000 464.4891 464.4891 0.0932 0.0105 469.9376
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.2832 2.5413 2.5463 5.2500e-
003
0.1762 0.1179 0.2942 0.0627 0.1102 0.1730 0.0000 464.4887 464.4887 0.0932 0.0105 469.9371
2023 0.3322 1.4984 1.8700 3.7800e-
003
0.0808 0.0682 0.1490 0.0222 0.0641 0.0863 0.0000 334.6315 334.6315 0.0572 8.9200e-
003
338.7200
Maximum 0.3322 2.5413 2.5463 5.2500e-
003
0.1762 0.1179 0.2942 0.0627 0.1102 0.1730 0.0000 464.4887 464.4887 0.0932 0.0105 469.9371
Mitigated Construction
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TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 44.71 0.00 31.92 50.01 0.00 24.68 0.00 0.00 0.00 0.00 0.00 0.00
Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter)
1 1-3-2022 4-2-2022 0.9337 0.9337
2 4-3-2022 7-2-2022 0.6314 0.6314
3 7-3-2022 10-2-2022 0.6383 0.6383
4 10-3-2022 1-2-2023 0.6388 0.6388
5 1-3-2023 4-2-2023 0.5699 0.5699
6 4-3-2023 7-2-2023 0.5747 0.5747
7 7-3-2023 9-30-2023 0.5110 0.5110
Highest 0.9337 0.9337
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TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 0.2352 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
Energy 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 43.9168 43.9168 2.9600e-
003
8.4000e-
004
44.2420
Mobile 0.0761 0.1068 0.6817 1.5100e-
003
0.1578 1.2400e-
003
0.1591 0.0422 1.1600e-
003
0.0433 0.0000 139.2195 139.2195 8.3200e-
003
7.5000e-
003
141.6628
Waste 0.0000 0.0000 0.0000 0.0000 4.3278 0.0000 4.3278 0.2558 0.0000 10.7219
Water 0.0000 0.0000 0.0000 0.0000 0.4134 2.2486 2.6621 0.0429 1.0500e-
003
4.0462
Total 0.3143 0.1470 0.9650 2.0500e-
003
0.1578 0.0230 0.1808 0.0422 0.0229 0.0651 6.7854 198.2300 205.0154 0.3166 9.6800e-
003
215.8178
Unmitigated Operational
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TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 0.2246 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
Energy 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 43.9168 43.9168 2.9600e-
003
8.4000e-
004
44.2420
Mobile 0.0761 0.1068 0.6817 1.5100e-
003
0.1578 1.2400e-
003
0.1591 0.0422 1.1600e-
003
0.0433 0.0000 139.2195 139.2195 8.3200e-
003
7.5000e-
003
141.6628
Waste 0.0000 0.0000 0.0000 0.0000 4.3278 0.0000 4.3278 0.2558 0.0000 10.7219
Water 0.0000 0.0000 0.0000 0.0000 0.3307 1.9082 2.2390 0.0343 8.4000e-
004
3.3475
Total 0.3038 0.1470 0.9650 2.0500e-
003
0.1578 0.0230 0.1808 0.0422 0.0229 0.0651 6.7027 197.8896 204.5923 0.3081 9.4700e-
003
215.1190
Mitigated Operational
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
3.34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.22 0.17 0.21 2.70 2.17 0.32
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 6 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Residential Indoor: 72,900; Residential Outdoor: 24,300; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 7 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0983 0.0000 0.0983 0.0505 0.0000 0.0505 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0159 0.1654 0.0985 1.9000e-
004
8.0600e-
003
8.0600e-
003
7.4200e-
003
7.4200e-
003
0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Total 0.0159 0.1654 0.0985 1.9000e-
004
0.0983 8.0600e-
003
0.1064 0.0505 7.4200e-
003
0.0579 0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Unmitigated Construction On-Site
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 106.00 41.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 21.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 8 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
7.4000e-
004
0.0000 7.4000e-
004
2.0000e-
004
0.0000 2.0000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Total 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
7.4000e-
004
0.0000 7.4000e-
004
2.0000e-
004
0.0000 2.0000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0326 0.0000 0.0326 0.0167 0.0000 0.0167 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0159 0.1654 0.0985 1.9000e-
004
8.0600e-
003
8.0600e-
003
7.4200e-
003
7.4200e-
003
0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Total 0.0159 0.1654 0.0985 1.9000e-
004
0.0326 8.0600e-
003
0.0406 0.0167 7.4200e-
003
0.0242 0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 9 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
6.1000e-
004
0.0000 6.2000e-
004
1.7000e-
004
0.0000 1.7000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Total 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
6.1000e-
004
0.0000 6.2000e-
004
1.7000e-
004
0.0000 1.7000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Mitigated Construction Off-Site
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.1611 0.0000 0.1611 0.0639 0.0000 0.0639 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0634 0.6798 0.5082 1.0900e-
003
0.0286 0.0286 0.0263 0.0263 0.0000 95.4356 95.4356 0.0309 0.0000 96.2072
Total 0.0634 0.6798 0.5082 1.0900e-
003
0.1611 0.0286 0.1897 0.0639 0.0263 0.0903 0.0000 95.4356 95.4356 0.0309 0.0000 96.2072
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 10 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.8800e-
003
1.0000e-
005
2.8900e-
003
7.6000e-
004
1.0000e-
005
7.8000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Total 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.8800e-
003
1.0000e-
005
2.8900e-
003
7.6000e-
004
1.0000e-
005
7.8000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0534 0.0000 0.0534 0.0212 0.0000 0.0212 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0634 0.6798 0.5082 1.0900e-
003
0.0286 0.0286 0.0263 0.0263 0.0000 95.4354 95.4354 0.0309 0.0000 96.2071
Total 0.0634 0.6798 0.5082 1.0900e-
003
0.0534 0.0286 0.0820 0.0212 0.0263 0.0475 0.0000 95.4354 95.4354 0.0309 0.0000 96.2071
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 11 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.3800e-
003
1.0000e-
005
2.4000e-
003
6.4000e-
004
1.0000e-
005
6.6000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Total 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.3800e-
003
1.0000e-
005
2.4000e-
003
6.4000e-
004
1.0000e-
005
6.6000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Mitigated Construction Off-Site
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9321 225.9321 0.0541 0.0000 227.2853
Total 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9321 225.9321 0.0541 0.0000 227.2853
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 12 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 5.6100e-
003
0.1502 0.0557 5.9000e-
004
0.0198 1.9200e-
003
0.0217 5.7100e-
003
1.8400e-
003
7.5500e-
003
0.0000 56.2945 56.2945 6.1000e-
004
8.3700e-
003
58.8036
Worker 0.0306 0.0224 0.2766 7.3000e-
004
0.0850 4.4000e-
004
0.0855 0.0226 4.1000e-
004
0.0230 0.0000 67.2444 67.2444 2.1100e-
003
2.0100e-
003
67.8960
Total 0.0362 0.1726 0.3324 1.3200e-
003
0.1048 2.3600e-
003
0.1072 0.0283 2.2500e-
003
0.0305 0.0000 123.5389 123.5389 2.7200e-
003
0.0104 126.6996
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9318 225.9318 0.0541 0.0000 227.2850
Total 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9318 225.9318 0.0541 0.0000 227.2850
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 13 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 5.6100e-
003
0.1502 0.0557 5.9000e-
004
0.0170 1.9200e-
003
0.0189 5.0200e-
003
1.8400e-
003
6.8600e-
003
0.0000 56.2945 56.2945 6.1000e-
004
8.3700e-
003
58.8036
Worker 0.0306 0.0224 0.2766 7.3000e-
004
0.0703 4.4000e-
004
0.0707 0.0190 4.1000e-
004
0.0194 0.0000 67.2444 67.2444 2.1100e-
003
2.0100e-
003
67.8960
Total 0.0362 0.1726 0.3324 1.3200e-
003
0.0873 2.3600e-
003
0.0896 0.0240 2.2500e-
003
0.0262 0.0000 123.5389 123.5389 2.7200e-
003
0.0104 126.6996
Mitigated Construction Off-Site
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8292 202.8292 0.0483 0.0000 204.0354
Total 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8292 202.8292 0.0483 0.0000 204.0354
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 14 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 3.6100e-
003
0.1063 0.0467 5.0000e-
004
0.0178 8.1000e-
004
0.0186 5.1300e-
003
7.7000e-
004
5.9000e-
003
0.0000 48.5420 48.5420 5.1000e-
004
7.1900e-
003
50.6979
Worker 0.0255 0.0178 0.2290 6.4000e-
004
0.0763 3.7000e-
004
0.0767 0.0203 3.4000e-
004
0.0206 0.0000 58.4133 58.4133 1.7100e-
003
1.6700e-
003
58.9529
Total 0.0291 0.1241 0.2758 1.1400e-
003
0.0941 1.1800e-
003
0.0952 0.0254 1.1100e-
003
0.0265 0.0000 106.9553 106.9553 2.2200e-
003
8.8600e-
003
109.6508
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8289 202.8289 0.0483 0.0000 204.0352
Total 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8289 202.8289 0.0483 0.0000 204.0352
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 15 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 3.6100e-
003
0.1063 0.0467 5.0000e-
004
0.0153 8.1000e-
004
0.0161 4.5100e-
003
7.7000e-
004
5.2800e-
003
0.0000 48.5420 48.5420 5.1000e-
004
7.1900e-
003
50.6979
Worker 0.0255 0.0178 0.2290 6.4000e-
004
0.0631 3.7000e-
004
0.0635 0.0170 3.4000e-
004
0.0174 0.0000 58.4133 58.4133 1.7100e-
003
1.6700e-
003
58.9529
Total 0.0291 0.1241 0.2758 1.1400e-
003
0.0783 1.1800e-
003
0.0795 0.0215 1.1100e-
003
0.0226 0.0000 106.9553 106.9553 2.2200e-
003
8.8600e-
003
109.6508
Mitigated Construction Off-Site
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.0103 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0269 20.0269 6.4800e-
003
0.0000 20.1888
Paving 7.0500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0174 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0269 20.0269 6.4800e-
003
0.0000 20.1888
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 16 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.2300e-
003
1.0000e-
005
1.2400e-
003
3.3000e-
004
1.0000e-
005
3.3000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Total 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.2300e-
003
1.0000e-
005
1.2400e-
003
3.3000e-
004
1.0000e-
005
3.3000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.0103 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0268 20.0268 6.4800e-
003
0.0000 20.1888
Paving 7.0500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0174 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0268 20.0268 6.4800e-
003
0.0000 20.1888
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 17 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.0200e-
003
1.0000e-
005
1.0300e-
003
2.8000e-
004
1.0000e-
005
2.8000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Total 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.0200e-
003
1.0000e-
005
1.0300e-
003
2.8000e-
004
1.0000e-
005
2.8000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Mitigated Construction Off-Site
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Archit. Coating 0.1452 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 1.9200e-
003
0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Total 0.1471 0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 18 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 5.8000e-
004
4.0000e-
004
5.1900e-
003
1.0000e-
005
1.7300e-
003
1.0000e-
005
1.7400e-
003
4.6000e-
004
1.0000e-
005
4.7000e-
004
0.0000 1.3226 1.3226 4.0000e-
005
4.0000e-
005
1.3348
Total 5.8000e-
004
4.0000e-
004
5.1900e-
003
1.0000e-
005
1.7300e-
003
1.0000e-
005
1.7400e-
003
4.6000e-
004
1.0000e-
005
4.7000e-
004
0.0000 1.3226 1.3226 4.0000e-
005
4.0000e-
005
1.3348
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Archit. Coating 0.1452 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 1.9200e-
003
0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Total 0.1471 0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 19 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 5.8000e-
004
4.0000e-
004
5.1900e-
003
1.0000e-
005
1.4300e-
003
1.0000e-
005
1.4400e-
003
3.9000e-
004
1.0000e-
005
3.9000e-
004
0.0000 1.3226 1.3226 4.0000e-
005
4.0000e-
005
1.3348
Total 5.8000e-
004
4.0000e-
004
5.1900e-
003
1.0000e-
005
1.4300e-
003
1.0000e-
005
1.4400e-
003
3.9000e-
004
1.0000e-
005
3.9000e-
004
0.0000 1.3226 1.3226 4.0000e-
005
4.0000e-
005
1.3348
Mitigated Construction Off-Site
4.0 Operational Detail - Mobile
4.1 Mitigation Measures Mobile
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 20 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 0.0761 0.1068 0.6817 1.5100e-
003
0.1578 1.2400e-
003
0.1591 0.0422 1.1600e-
003
0.0433 0.0000 139.2195 139.2195 8.3200e-
003
7.5000e-
003
141.6628
Unmitigated 0.0761 0.1068 0.6817 1.5100e-
003
0.1578 1.2400e-
003
0.1591 0.0422 1.1600e-
003
0.0433 0.0000 139.2195 139.2195 8.3200e-
003
7.5000e-
003
141.6628
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 188.80 190.80 171.00 417,282 417,282
Total 188.80 190.80 171.00 417,282 417,282
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 21 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Electricity
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 13.7269 13.7269 2.3800e-
003
2.9000e-
004
13.8726
Electricity
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 13.7269 13.7269 2.3800e-
003
2.9000e-
004
13.8726
NaturalGas
Mitigated
3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
NaturalGas
Unmitigated
3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
5.1 Mitigation Measures Energy
Historical Energy Use: N
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 22 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
565739 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
Total 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
565739 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
Total 3.0500e-
003
0.0261 0.0111 1.7000e-
004
2.1100e-
003
2.1100e-
003
2.1100e-
003
2.1100e-
003
0.0000 30.1900 30.1900 5.8000e-
004
5.5000e-
004
30.3694
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 23 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.3 Energy by Land Use - Electricity
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
159293 13.7269 2.3800e-
003
2.9000e-
004
13.8726
Total 13.7269 2.3800e-
003
2.9000e-
004
13.8726
Unmitigated
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
159293 13.7269 2.3800e-
003
2.9000e-
004
13.8726
Total 13.7269 2.3800e-
003
2.9000e-
004
13.8726
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 24 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 0.2246 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
Unmitigated 0.2352 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 25 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
0.0145 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.1558 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 0.0604 0.0125 0.1237 3.6000e-
004
0.0188 0.0188 0.0188 0.0188 2.0442 12.6024 14.6466 6.5000e-
003
2.9000e-
004
14.8965
Landscaping 4.4700e-
003
1.7100e-
003
0.1485 1.0000e-
005
8.2000e-
004
8.2000e-
004
8.2000e-
004
8.2000e-
004
0.0000 0.2427 0.2427 2.3000e-
004
0.0000 0.2485
Total 0.2352 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 26 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
0.0145 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.1452 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 0.0604 0.0125 0.1237 3.6000e-
004
0.0188 0.0188 0.0188 0.0188 2.0442 12.6024 14.6466 6.5000e-
003
2.9000e-
004
14.8965
Landscaping 4.4700e-
003
1.7100e-
003
0.1485 1.0000e-
005
8.2000e-
004
8.2000e-
004
8.2000e-
004
8.2000e-
004
0.0000 0.2427 0.2427 2.3000e-
004
0.0000 0.2485
Total 0.2246 0.0142 0.2722 3.7000e-
004
0.0196 0.0196 0.0196 0.0196 2.0442 12.8451 14.8893 6.7300e-
003
2.9000e-
004
15.1450
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 27 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Total CO2 CH4 N2O CO2e
Category MT/yr
Mitigated 2.2390 0.0343 8.4000e-
004
3.3475
Unmitigated 2.6621 0.0429 1.0500e-
003
4.0462
7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
Other Asphalt
Surfaces
0 / 0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.30308 /
0.821507
2.6621 0.0429 1.0500e-
003
4.0462
Total 2.6621 0.0429 1.0500e-
003
4.0462
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 28 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
Other Asphalt
Surfaces
0 / 0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.04246 /
0.771395
2.2390 0.0343 8.4000e-
004
3.3475
Total 2.2390 0.0343 8.4000e-
004
3.3475
Mitigated
8.1 Mitigation Measures Waste
8.0 Waste Detail
Total CO2 CH4 N2O CO2e
MT/yr
Mitigated 4.3278 0.2558 0.0000 10.7219
Unmitigated 4.3278 0.2558 0.0000 10.7219
Category/Year
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:35 PMPage 29 of 31
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
8.2 Waste by Land Use
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
21.32 4.3278 0.2558 0.0000 10.7219
Total 4.3278 0.2558 0.0000 10.7219
Unmitigated
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
21.32 4.3278 0.2558 0.0000 10.7219
Total 4.3278 0.2558 0.0000 10.7219
Mitigated
9.0 Operational Offroad
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix C – CalEEMod Summer Emissions Report –
20 Lots
TTM No. 38083 Addendum - 20 Lots
Riverside-Salton Sea County, Summer
Project Characteristics - This model run applies to the currently mapped condition involving 20 one-acre lots. The subdivision of 20 lots into 37 lots will be
reflected in a separate model run to determine the quantitative emissions differences. For analysis purposes, the assumed start of construction date is
approximately three months from the date of this analysis.
Land Use - The current tract map condition includes 20 lots totaling approximately 19.55 acres plus areas for interior road improvements and open space
(categorized as other asphalt surfaces). Population estimates are based on the May 2021 CDF household estimate of 2.60 PPH.
Construction Phase - Default construction time frames are accepted. No structural demolition phase would be involved.
Architectural Coating - SCAQMD Rule 1113 would apply toward the VOC limits in architectural coatings.
Area Coating - SCAMQD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - SCAMQD Rule 403/403.1 and LQ Municipal COde would apply through a requirement of dust control measures.
This is not a form of mitigation for the Coachella Valley.
Mobile Land Use Mitigation -
Area Mitigation - SCAQMD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 20.00 Dwelling Unit 19.55 36,000.00 52
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Nonresidential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Nonresidential_Interior 250.00 50.00
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 20
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 6.49 19.55
tblLandUse Population 57.00 52.00
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6926 38.8842 29.6608 0.0636 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1163 6,216.042
0
2023 14.7793 15.7353 19.7918 0.0406 1.0926 0.7132 1.8058 0.2945 0.6712 0.9657 0.0000 3,959.327
0
3,959.327
0
0.7170 0.1106 4,008.171
4
Maximum 14.7793 38.8842 29.6608 0.0636 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1163 6,216.042
0
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6926 38.8842 29.6608 0.0636 6.6407 1.6357 8.2541 3.3825 1.5049 4.8668 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1163 6,216.042
0
2023 14.7793 15.7353 19.7918 0.0406 0.9092 0.7132 1.6224 0.2495 0.6712 0.9206 0.0000 3,959.327
0
3,959.327
0
0.7170 0.1106 4,008.171
4
Maximum 14.7793 38.8842 29.6608 0.0636 6.6407 1.6357 8.2541 3.3825 1.5049 4.8668 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1163 6,216.042
0
Mitigated Construction
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ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 63.88 0.00 57.48 65.20 0.00 54.04 0.00 0.00 0.00 0.00 0.00 0.00
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Energy 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mobile 0.5084 0.5642 4.1275 8.9600e-
003
0.9018 6.9900e-
003
0.9088 0.2406 6.5500e-
003
0.2471 913.3008 913.3008 0.0498 0.0453 928.0467
Total 2.9813 1.0303 8.8553 0.0188 0.9018 0.4860 1.3878 0.2406 0.4856 0.7262 54.9593 1,437.445
8
1,492.405
1
0.2309 0.0565 1,515.023
9
Unmitigated Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Energy 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mobile 0.5084 0.5642 4.1275 8.9600e-
003
0.9018 6.9900e-
003
0.9088 0.2406 6.5500e-
003
0.2471 913.3008 913.3008 0.0498 0.0453 928.0467
Total 2.9237 1.0303 8.8553 0.0188 0.9018 0.4860 1.3878 0.2406 0.4856 0.7262 54.9593 1,437.445
8
1,492.405
1
0.2309 0.0565 1,515.023
9
Mitigated Operational
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3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
1.93 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Residential Indoor: 72,900; Residential Outdoor: 24,300; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 106.00 41.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 21.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 7 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 19.6570 0.0000 19.6570 10.1025 0.0000 10.1025 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 19.6570 1.6126 21.2696 10.1025 1.4836 11.5860 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0610 0.0366 0.5574 1.3800e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Total 0.0610 0.0366 0.5574 1.3800e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Unmitigated Construction Off-Site
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 6.5163 0.0000 6.5163 3.3490 0.0000 3.3490 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 6.5163 1.6126 8.1289 3.3490 1.4836 4.8325 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0610 0.0366 0.5574 1.3800e-
003
0.1244 7.7000e-
004
0.1252 0.0335 7.1000e-
004
0.0342 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Total 0.0610 0.0366 0.5574 1.3800e-
003
0.1244 7.7000e-
004
0.1252 0.0335 7.1000e-
004
0.0342 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Mitigated Construction Off-Site
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3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 9.2036 0.0000 9.2036 3.6538 0.0000 3.6538 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 9.2036 1.6349 10.8385 3.6538 1.5041 5.1579 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0678 0.0407 0.6193 1.5300e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Total 0.0678 0.0407 0.6193 1.5300e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 10 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 3.0510 0.0000 3.0510 1.2112 0.0000 1.2112 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 3.0510 1.6349 4.6859 1.2112 1.5041 2.7153 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0678 0.0407 0.6193 1.5300e-
003
0.1383 8.6000e-
004
0.1391 0.0372 7.9000e-
004
0.0380 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Total 0.0678 0.0407 0.6193 1.5300e-
003
0.1383 8.6000e-
004
0.1391 0.0372 7.9000e-
004
0.0380 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Mitigated Construction Off-Site
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3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0591 1.4705 0.5610 6.0000e-
003
0.2058 0.0197 0.2254 0.0593 0.0188 0.0781 636.0878 636.0878 6.9700e-
003
0.0945 664.4224
Worker 0.3592 0.2158 3.2823 8.1100e-
003
0.8869 4.5400e-
003
0.8914 0.2352 4.1800e-
003
0.2394 819.8531 819.8531 0.0234 0.0218 826.9389
Total 0.4182 1.6863 3.8433 0.0141 1.0926 0.0242 1.1169 0.2945 0.0230 0.3175 1,455.940
9
1,455.940
9
0.0304 0.1163 1,491.361
3
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 12 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0591 1.4705 0.5610 6.0000e-
003
0.1765 0.0197 0.1962 0.0521 0.0188 0.0709 636.0878 636.0878 6.9700e-
003
0.0945 664.4224
Worker 0.3592 0.2158 3.2823 8.1100e-
003
0.7327 4.5400e-
003
0.7373 0.1974 4.1800e-
003
0.2016 819.8531 819.8531 0.0234 0.0218 826.9389
Total 0.4182 1.6863 3.8433 0.0141 0.9092 0.0242 0.9334 0.2495 0.0230 0.2725 1,455.940
9
1,455.940
9
0.0304 0.1163 1,491.361
3
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 13 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0430 1.1592 0.5256 5.7600e-
003
0.2058 9.1900e-
003
0.2150 0.0593 8.8000e-
003
0.0681 610.7317 610.7317 6.4800e-
003
0.0904 637.8392
Worker 0.3327 0.1912 3.0222 7.8500e-
003
0.8869 4.2700e-
003
0.8911 0.2352 3.9300e-
003
0.2392 793.3854 793.3854 0.0211 0.0202 799.9262
Total 0.3756 1.3504 3.5478 0.0136 1.0926 0.0135 1.1061 0.2945 0.0127 0.3072 1,404.117
1
1,404.117
1
0.0276 0.1106 1,437.765
3
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 14 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0430 1.1592 0.5256 5.7600e-
003
0.1765 9.1900e-
003
0.1857 0.0521 8.8000e-
003
0.0609 610.7317 610.7317 6.4800e-
003
0.0904 637.8392
Worker 0.3327 0.1912 3.0222 7.8500e-
003
0.7327 4.2700e-
003
0.7370 0.1974 3.9300e-
003
0.2013 793.3854 793.3854 0.0211 0.0202 799.9262
Total 0.3756 1.3504 3.5478 0.0136 0.9092 0.0135 0.9227 0.2495 0.0127 0.2622 1,404.117
1
1,404.117
1
0.0276 0.1106 1,437.765
3
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 15 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0471 0.0271 0.4277 1.1100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Total 0.0471 0.0271 0.4277 1.1100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 16 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0471 0.0271 0.4277 1.1100e-
003
0.1037 6.0000e-
004
0.1043 0.0279 5.6000e-
004
0.0285 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Total 0.0471 0.0271 0.4277 1.1100e-
003
0.1037 6.0000e-
004
0.1043 0.0279 5.6000e-
004
0.0285 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 17 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 14.5217 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Total 14.7134 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0659 0.0379 0.5988 1.5600e-
003
0.1757 8.5000e-
004
0.1766 0.0466 7.8000e-
004
0.0474 157.1801 157.1801 4.1800e-
003
4.0000e-
003
158.4759
Total 0.0659 0.0379 0.5988 1.5600e-
003
0.1757 8.5000e-
004
0.1766 0.0466 7.8000e-
004
0.0474 157.1801 157.1801 4.1800e-
003
4.0000e-
003
158.4759
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 18 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 14.5217 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Total 14.7134 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0659 0.0379 0.5988 1.5600e-
003
0.1452 8.5000e-
004
0.1460 0.0391 7.8000e-
004
0.0399 157.1801 157.1801 4.1800e-
003
4.0000e-
003
158.4759
Total 0.0659 0.0379 0.5988 1.5600e-
003
0.1452 8.5000e-
004
0.1460 0.0391 7.8000e-
004
0.0399 157.1801 157.1801 4.1800e-
003
4.0000e-
003
158.4759
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 19 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.5084 0.5642 4.1275 8.9600e-
003
0.9018 6.9900e-
003
0.9088 0.2406 6.5500e-
003
0.2471 913.3008 913.3008 0.0498 0.0453 928.0467
Unmitigated 0.5084 0.5642 4.1275 8.9600e-
003
0.9018 6.9900e-
003
0.9088 0.2406 6.5500e-
003
0.2471 913.3008 913.3008 0.0498 0.0453 928.0467
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 188.80 190.80 171.00 417,282 417,282
Total 188.80 190.80 171.00 417,282 417,282
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 20 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
NaturalGas
Unmitigated
0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
5.1 Mitigation Measures Energy
Historical Energy Use: N
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 21 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1549.97 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Total 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.54997 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Total 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 22 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Unmitigated 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 23 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.0796 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.8534 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 1.4736 0.3043 3.0171 8.8000e-
003
0.4584 0.4584 0.4584 0.4584 54.9593 338.8235 393.7828 0.1747 7.8900e-
003
400.5008
Landscaping 0.0496 0.0190 1.6499 9.0000e-
005
9.1400e-
003
9.1400e-
003
9.1400e-
003
9.1400e-
003
2.9722 2.9722 2.8500e-
003
3.0436
Total 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5444
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:28 PMPage 24 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.0796 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.7958 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 1.4736 0.3043 3.0171 8.8000e-
003
0.4584 0.4584 0.4584 0.4584 54.9593 338.8235 393.7828 0.1747 7.8900e-
003
400.5008
Landscaping 0.0496 0.0190 1.6499 9.0000e-
005
9.1400e-
003
9.1400e-
003
9.1400e-
003
9.1400e-
003
2.9722 2.9722 2.8500e-
003
3.0436
Total 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5444
Mitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix D – CalEEMod Winter Emissions Report –
20 Lots
TTM No. 38083 Addendum - 20 Lots
Riverside-Salton Sea County, Winter
Project Characteristics - This model run applies to the currently mapped condition involving 20 one-acre lots. The subdivision of 20 lots into 37 lots will be
reflected in a separate model run to determine the quantitative emissions differences. For analysis purposes, the assumed start of construction date is
approximately three months from the date of this analysis.
Land Use - The current tract map condition includes 20 lots totaling approximately 19.55 acres plus areas for interior road improvements and open space
(categorized as other asphalt surfaces). Population estimates are based on the May 2021 CDF household estimate of 2.60 PPH.
Construction Phase - Default construction time frames are accepted. No structural demolition phase would be involved.
Architectural Coating - SCAQMD Rule 1113 would apply toward the VOC limits in architectural coatings.
Area Coating - SCAMQD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - SCAMQD Rule 403/403.1 and LQ Municipal COde would apply through a requirement of dust control measures.
This is not a form of mitigation for the Coachella Valley.
Mobile Land Use Mitigation -
Area Mitigation - SCAQMD Rule 1113 would apply toward the VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 20.00 Dwelling Unit 19.55 36,000.00 52
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Nonresidential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Nonresidential_Interior 250.00 50.00
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 20
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 6.49 19.55
tblLandUse Population 57.00 52.00
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 2 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6867 38.8857 29.5511 0.0635 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1170 6,201.570
1
2023 14.7737 15.8140 19.2816 0.0398 1.0926 0.7132 1.8059 0.2945 0.6712 0.9657 0.0000 3,887.061
4
3,887.061
4
0.7170 0.1114 3,936.163
4
Maximum 14.7737 38.8857 29.5511 0.0635 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1170 6,201.570
1
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6867 38.8857 29.5511 0.0635 6.6407 1.6357 8.2541 3.3825 1.5049 4.8668 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1170 6,201.570
1
2023 14.7737 15.8140 19.2816 0.0398 0.9092 0.7132 1.6224 0.2495 0.6712 0.9207 0.0000 3,887.061
4
3,887.061
4
0.7170 0.1114 3,936.163
3
Maximum 14.7737 38.8857 29.5511 0.0635 6.6407 1.6357 8.2541 3.3825 1.5049 4.8668 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1170 6,201.570
1
Mitigated Construction
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 63.88 0.00 57.48 65.20 0.00 54.04 0.00 0.00 0.00 0.00 0.00 0.00
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Energy 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mobile 0.4225 0.5983 3.7253 8.3300e-
003
0.9018 7.0000e-
003
0.9088 0.2406 6.5600e-
003
0.2471 849.2937 849.2937 0.0518 0.0463 864.3818
Total 2.8954 1.0644 8.4531 0.0181 0.9018 0.4860 1.3878 0.2406 0.4856 0.7262 54.9593 1,373.438
8
1,428.398
1
0.2328 0.0575 1,451.359
1
Unmitigated Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Energy 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mobile 0.4225 0.5983 3.7253 8.3300e-
003
0.9018 7.0000e-
003
0.9088 0.2406 6.5600e-
003
0.2471 849.2937 849.2937 0.0518 0.0463 864.3818
Total 2.8378 1.0644 8.4531 0.0181 0.9018 0.4860 1.3878 0.2406 0.4856 0.7262 54.9593 1,373.438
8
1,428.398
1
0.2328 0.0575 1,451.359
1
Mitigated Operational
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
1.99 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Residential Indoor: 72,900; Residential Outdoor: 24,300; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 106.00 41.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 21.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 7 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 19.6570 0.0000 19.6570 10.1025 0.0000 10.1025 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 19.6570 1.6126 21.2696 10.1025 1.4836 11.5860 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0557 0.0380 0.4586 1.2500e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Total 0.0557 0.0380 0.4586 1.2500e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 8 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 6.5163 0.0000 6.5163 3.3490 0.0000 3.3490 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 6.5163 1.6126 8.1289 3.3490 1.4836 4.8325 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0557 0.0380 0.4586 1.2500e-
003
0.1244 7.7000e-
004
0.1252 0.0335 7.1000e-
004
0.0342 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Total 0.0557 0.0380 0.4586 1.2500e-
003
0.1244 7.7000e-
004
0.1252 0.0335 7.1000e-
004
0.0342 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 9 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 9.2036 0.0000 9.2036 3.6538 0.0000 3.6538 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 9.2036 1.6349 10.8385 3.6538 1.5041 5.1579 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0618 0.0423 0.5096 1.3900e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Total 0.0618 0.0423 0.5096 1.3900e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 10 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 3.0510 0.0000 3.0510 1.2112 0.0000 1.2112 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 3.0510 1.6349 4.6859 1.2112 1.5041 2.7153 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0618 0.0423 0.5096 1.3900e-
003
0.1383 8.6000e-
004
0.1391 0.0372 7.9000e-
004
0.0380 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Total 0.0618 0.0423 0.5096 1.3900e-
003
0.1383 8.6000e-
004
0.1391 0.0372 7.9000e-
004
0.0380 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 11 of 26
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0562 1.5496 0.5845 6.0100e-
003
0.2058 0.0198 0.2255 0.0593 0.0189 0.0782 636.9511 636.9511 6.8400e-
003
0.0947 665.3433
Worker 0.3278 0.2240 2.7008 7.3500e-
003
0.8869 4.5400e-
003
0.8914 0.2352 4.1800e-
003
0.2394 742.9851 742.9851 0.0238 0.0223 750.2375
Total 0.3839 1.7736 3.2853 0.0134 1.0926 0.0243 1.1169 0.2945 0.0231 0.3176 1,379.936
3
1,379.936
3
0.0307 0.1170 1,415.580
8
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 12 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0562 1.5496 0.5845 6.0100e-
003
0.1765 0.0198 0.1962 0.0521 0.0189 0.0710 636.9511 636.9511 6.8400e-
003
0.0947 665.3433
Worker 0.3278 0.2240 2.7008 7.3500e-
003
0.7327 4.5400e-
003
0.7373 0.1974 4.1800e-
003
0.2016 742.9851 742.9851 0.0238 0.0223 750.2375
Total 0.3839 1.7736 3.2853 0.0134 0.9092 0.0243 0.9335 0.2495 0.0231 0.2726 1,379.936
3
1,379.936
3
0.0307 0.1170 1,415.580
8
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 13 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0395 1.2307 0.5444 5.7800e-
003
0.2058 9.2400e-
003
0.2150 0.0593 8.8300e-
003
0.0681 612.6174 612.6174 6.3300e-
003
0.0908 639.8281
Worker 0.3044 0.1984 2.4932 7.1200e-
003
0.8869 4.2700e-
003
0.8911 0.2352 3.9300e-
003
0.2392 719.2342 719.2342 0.0215 0.0207 725.9292
Total 0.3439 1.4291 3.0376 0.0129 1.0926 0.0135 1.1061 0.2945 0.0128 0.3073 1,331.851
5
1,331.851
5
0.0279 0.1114 1,365.757
3
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 14 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0395 1.2307 0.5444 5.7800e-
003
0.1765 9.2400e-
003
0.1857 0.0521 8.8300e-
003
0.0609 612.6174 612.6174 6.3300e-
003
0.0908 639.8281
Worker 0.3044 0.1984 2.4932 7.1200e-
003
0.7327 4.2700e-
003
0.7370 0.1974 3.9300e-
003
0.2013 719.2342 719.2342 0.0215 0.0207 725.9292
Total 0.3439 1.4291 3.0376 0.0129 0.9092 0.0135 0.9227 0.2495 0.0128 0.2623 1,331.851
5
1,331.851
5
0.0279 0.1114 1,365.757
3
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 15 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0431 0.0281 0.3528 1.0100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Total 0.0431 0.0281 0.3528 1.0100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 16 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0431 0.0281 0.3528 1.0100e-
003
0.1037 6.0000e-
004
0.1043 0.0279 5.6000e-
004
0.0285 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Total 0.0431 0.0281 0.3528 1.0100e-
003
0.1037 6.0000e-
004
0.1043 0.0279 5.6000e-
004
0.0285 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 17 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 14.5217 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Total 14.7134 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0603 0.0393 0.4939 1.4100e-
003
0.1757 8.5000e-
004
0.1766 0.0466 7.8000e-
004
0.0474 142.4898 142.4898 4.2600e-
003
4.0900e-
003
143.8162
Total 0.0603 0.0393 0.4939 1.4100e-
003
0.1757 8.5000e-
004
0.1766 0.0466 7.8000e-
004
0.0474 142.4898 142.4898 4.2600e-
003
4.0900e-
003
143.8162
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 18 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 14.5217 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Total 14.7134 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0603 0.0393 0.4939 1.4100e-
003
0.1452 8.5000e-
004
0.1460 0.0391 7.8000e-
004
0.0399 142.4898 142.4898 4.2600e-
003
4.0900e-
003
143.8162
Total 0.0603 0.0393 0.4939 1.4100e-
003
0.1452 8.5000e-
004
0.1460 0.0391 7.8000e-
004
0.0399 142.4898 142.4898 4.2600e-
003
4.0900e-
003
143.8162
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 19 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.4225 0.5983 3.7253 8.3300e-
003
0.9018 7.0000e-
003
0.9088 0.2406 6.5600e-
003
0.2471 849.2937 849.2937 0.0518 0.0463 864.3818
Unmitigated 0.4225 0.5983 3.7253 8.3300e-
003
0.9018 7.0000e-
003
0.9088 0.2406 6.5600e-
003
0.2471 849.2937 849.2937 0.0518 0.0463 864.3818
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 188.80 190.80 171.00 417,282 417,282
Total 188.80 190.80 171.00 417,282 417,282
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 20 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
NaturalGas
Unmitigated
0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
5.1 Mitigation Measures Energy
Historical Energy Use: N
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 21 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1549.97 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Total 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.54997 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Total 0.0167 0.1428 0.0608 9.1000e-
004
0.0116 0.0116 0.0116 0.0116 182.3493 182.3493 3.5000e-
003
3.3400e-
003
183.4329
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 22 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
Unmitigated 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5443
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 5:33 PMPage 23 of 26
TTM No. 38083 Addendum - 20 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.0796 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.8534 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 1.4736 0.3043 3.0171 8.8000e-
003
0.4584 0.4584 0.4584 0.4584 54.9593 338.8235 393.7828 0.1747 7.8900e-
003
400.5008
Landscaping 0.0496 0.0190 1.6499 9.0000e-
005
9.1400e-
003
9.1400e-
003
9.1400e-
003
9.1400e-
003
2.9722 2.9722 2.8500e-
003
3.0436
Total 2.4562 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5444
Unmitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.0796 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.7958 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 1.4736 0.3043 3.0171 8.8000e-
003
0.4584 0.4584 0.4584 0.4584 54.9593 338.8235 393.7828 0.1747 7.8900e-
003
400.5008
Landscaping 0.0496 0.0190 1.6499 9.0000e-
005
9.1400e-
003
9.1400e-
003
9.1400e-
003
9.1400e-
003
2.9722 2.9722 2.8500e-
003
3.0436
Total 2.3986 0.3233 4.6670 8.8900e-
003
0.4675 0.4675 0.4675 0.4675 54.9593 341.7958 396.7550 0.1776 7.8900e-
003
403.5444
Mitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix E – CalEEMod Annual Emissions Report –
37 Lots
TTM No. 38083 Addendum - 37 Lots
Riverside-Salton Sea County, Annual
Project Characteristics - This model applies to the proposed TTM condition involving 37 single-family residential lots.
Land Use - The proposed project would involve 37 lots with a total area of 19.55 AC. The estimated population is rounded up from the CDF household size of
2.60. The associated roads and open space are represented as other asphalt surfaces.
Construction Phase - Default construction time frames are accepted. No structural demolition would be involved.
Architectural Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Area Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - Dust control compliance with SCAQMD Rule 403/403.1 is mandatory and not considered mitigation.
Mobile Land Use Mitigation -
Area Mitigation - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 37.00 Dwelling Unit 19.55 66,600.00 97
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 80
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 12.01 19.55
tblLandUse Population 106.00 97.00
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.2850 2.5462 2.5633 5.3100e-
003
0.3731 0.1180 0.4911 0.1451 0.1103 0.2554 0.0000 469.6684 469.6684 0.0933 0.0108 475.2150
2023 0.4295 1.5020 1.8843 3.8300e-
003
0.1019 0.0683 0.1701 0.0275 0.0642 0.0917 0.0000 339.1852 339.1852 0.0573 9.2000e-
003
343.3573
Maximum 0.4295 2.5462 2.5633 5.3100e-
003
0.3731 0.1180 0.4911 0.1451 0.1103 0.2554 0.0000 469.6684 469.6684 0.0933 0.0108 475.2150
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year tons/yr MT/yr
2022 0.2850 2.5462 2.5633 5.3100e-
003
0.1234 0.1180 0.2414 0.0499 0.1103 0.1602 0.0000 469.6680 469.6680 0.0933 0.0108 475.2146
2023 0.4295 1.5020 1.8843 3.8300e-
003
0.0335 0.0683 0.1018 0.0107 0.0642 0.0749 0.0000 339.1849 339.1849 0.0573 9.2000e-
003
343.3571
Maximum 0.4295 2.5462 2.5633 5.3100e-
003
0.1234 0.1180 0.2414 0.0499 0.1103 0.1602 0.0000 469.6680 469.6680 0.0933 0.0108 475.2146
Mitigated Construction
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 66.95 0.00 48.09 64.90 0.00 32.27 0.00 0.00 0.00 0.00 0.00 0.00
Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter)
1 1-3-2022 4-2-2022 0.9337 0.9337
2 4-3-2022 7-2-2022 0.6336 0.6336
3 7-3-2022 10-2-2022 0.6406 0.6406
4 10-3-2022 1-2-2023 0.6411 0.6411
5 1-3-2023 4-2-2023 0.5718 0.5718
6 4-3-2023 7-2-2023 0.5766 0.5766
7 7-3-2023 9-30-2023 0.5157 0.5157
Highest 0.9337 0.9337
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 0.4194 0.0263 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
Energy 5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 81.2461 81.2461 5.4800e-
003
1.5600e-
003
81.8476
Mobile 0.1408 0.1975 1.2612 2.7900e-
003
0.2920 2.3000e-
003
0.2943 0.0780 2.1600e-
003
0.0802 0.0000 257.5561 257.5561 0.0154 0.0139 262.0761
Waste 0.0000 0.0000 0.0000 0.0000 8.0730 0.0000 8.0730 0.4771 0.0000 20.0004
Water 0.0000 0.0000 0.0000 0.0000 0.7648 4.1600 4.9248 0.0793 1.9400e-
003
7.4855
Total 0.5658 0.2720 1.7852 3.7800e-
003
0.2920 0.0425 0.3345 0.0780 0.0424 0.1203 12.6195 366.7255 379.3450 0.5897 0.0179 399.4277
Unmitigated Operational
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Area 0.3999 0.0263 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
Energy 5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 81.2461 81.2461 5.4800e-
003
1.5600e-
003
81.8476
Mobile 0.1408 0.1975 1.2612 2.7900e-
003
0.2920 2.3000e-
003
0.2943 0.0780 2.1600e-
003
0.0802 0.0000 257.5561 257.5561 0.0154 0.0139 262.0761
Waste 0.0000 0.0000 0.0000 0.0000 8.0730 0.0000 8.0730 0.4771 0.0000 20.0004
Water 0.0000 0.0000 0.0000 0.0000 0.6118 3.5302 4.1421 0.0635 1.5600e-
003
6.1928
Total 0.5463 0.2720 1.7852 3.7800e-
003
0.2920 0.0425 0.3345 0.0780 0.0424 0.1203 12.4665 366.0957 378.5623 0.5739 0.0175 398.1350
Mitigated Operational
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
3.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.21 0.17 0.21 2.68 2.12 0.32
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Residential Indoor: 134,865; Residential Outdoor: 44,955; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0983 0.0000 0.0983 0.0505 0.0000 0.0505 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0159 0.1654 0.0985 1.9000e-
004
8.0600e-
003
8.0600e-
003
7.4200e-
003
7.4200e-
003
0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Total 0.0159 0.1654 0.0985 1.9000e-
004
0.0983 8.0600e-
003
0.1064 0.0505 7.4200e-
003
0.0579 0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Unmitigated Construction On-Site
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 112.00 42.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 22.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
7.4000e-
004
0.0000 7.4000e-
004
2.0000e-
004
0.0000 2.0000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Total 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
7.4000e-
004
0.0000 7.4000e-
004
2.0000e-
004
0.0000 2.0000e-
004
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0326 0.0000 0.0326 0.0167 0.0000 0.0167 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0159 0.1654 0.0985 1.9000e-
004
8.0600e-
003
8.0600e-
003
7.4200e-
003
7.4200e-
003
0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Total 0.0159 0.1654 0.0985 1.9000e-
004
0.0326 8.0600e-
003
0.0406 0.0167 7.4200e-
003
0.0242 0.0000 16.7197 16.7197 5.4100e-
003
0.0000 16.8549
Mitigated Construction On-Site
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
2.3000e-
004
0.0000 2.3000e-
004
7.0000e-
005
0.0000 7.0000e-
005
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Total 2.7000e-
004
1.9000e-
004
2.4100e-
003
1.0000e-
005
2.3000e-
004
0.0000 2.3000e-
004
7.0000e-
005
0.0000 7.0000e-
005
0.0000 0.5856 0.5856 2.0000e-
005
2.0000e-
005
0.5913
Mitigated Construction Off-Site
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.1611 0.0000 0.1611 0.0639 0.0000 0.0639 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0634 0.6798 0.5082 1.0900e-
003
0.0286 0.0286 0.0263 0.0263 0.0000 95.4356 95.4356 0.0309 0.0000 96.2072
Total 0.0634 0.6798 0.5082 1.0900e-
003
0.1611 0.0286 0.1897 0.0639 0.0263 0.0903 0.0000 95.4356 95.4356 0.0309 0.0000 96.2072
Unmitigated Construction On-Site
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.8800e-
003
1.0000e-
005
2.8900e-
003
7.6000e-
004
1.0000e-
005
7.8000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Total 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
2.8800e-
003
1.0000e-
005
2.8900e-
003
7.6000e-
004
1.0000e-
005
7.8000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Fugitive Dust 0.0534 0.0000 0.0534 0.0212 0.0000 0.0212 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.0634 0.6798 0.5082 1.0900e-
003
0.0286 0.0286 0.0263 0.0263 0.0000 95.4354 95.4354 0.0309 0.0000 96.2071
Total 0.0634 0.6798 0.5082 1.0900e-
003
0.0534 0.0286 0.0820 0.0212 0.0263 0.0475 0.0000 95.4354 95.4354 0.0309 0.0000 96.2071
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 11 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
8.8000e-
004
1.0000e-
005
9.0000e-
004
2.7000e-
004
1.0000e-
005
2.9000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Total 1.0400e-
003
7.6000e-
004
9.3700e-
003
2.0000e-
005
8.8000e-
004
1.0000e-
005
9.0000e-
004
2.7000e-
004
1.0000e-
005
2.9000e-
004
0.0000 2.2773 2.2773 7.0000e-
005
7.0000e-
005
2.2993
Mitigated Construction Off-Site
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9321 225.9321 0.0541 0.0000 227.2853
Total 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9321 225.9321 0.0541 0.0000 227.2853
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 12 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 5.7500e-
003
0.1539 0.0571 6.0000e-
004
0.0203 1.9700e-
003
0.0222 5.8500e-
003
1.8800e-
003
7.7300e-
003
0.0000 57.6675 57.6675 6.3000e-
004
8.5700e-
003
60.2378
Worker 0.0323 0.0237 0.2923 7.7000e-
004
0.0898 4.7000e-
004
0.0903 0.0239 4.3000e-
004
0.0243 0.0000 71.0507 71.0507 2.2300e-
003
2.1200e-
003
71.7392
Total 0.0381 0.1776 0.3494 1.3700e-
003
0.1101 2.4400e-
003
0.1126 0.0297 2.3100e-
003
0.0320 0.0000 128.7182 128.7182 2.8600e-
003
0.0107 131.9770
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9318 225.9318 0.0541 0.0000 227.2850
Total 0.1664 1.5225 1.5954 2.6300e-
003
0.0789 0.0789 0.0742 0.0742 0.0000 225.9318 225.9318 0.0541 0.0000 227.2850
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 13 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 5.7500e-
003
0.1539 0.0571 6.0000e-
004
8.8000e-
003
1.9700e-
003
0.0108 3.0400e-
003
1.8800e-
003
4.9200e-
003
0.0000 57.6675 57.6675 6.3000e-
004
8.5700e-
003
60.2378
Worker 0.0323 0.0237 0.2923 7.7000e-
004
0.0275 4.7000e-
004
0.0280 8.5700e-
003
4.3000e-
004
9.0000e-
003
0.0000 71.0507 71.0507 2.2300e-
003
2.1200e-
003
71.7392
Total 0.0381 0.1776 0.3494 1.3700e-
003
0.0363 2.4400e-
003
0.0388 0.0116 2.3100e-
003
0.0139 0.0000 128.7182 128.7182 2.8600e-
003
0.0107 131.9770
Mitigated Construction Off-Site
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8292 202.8292 0.0483 0.0000 204.0354
Total 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8292 202.8292 0.0483 0.0000 204.0354
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 14 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 3.6900e-
003
0.1089 0.0479 5.2000e-
004
0.0182 8.3000e-
004
0.0190 5.2500e-
003
7.9000e-
004
6.0400e-
003
0.0000 49.7260 49.7260 5.2000e-
004
7.3700e-
003
51.9344
Worker 0.0269 0.0188 0.2420 6.7000e-
004
0.0806 3.9000e-
004
0.0810 0.0214 3.6000e-
004
0.0218 0.0000 61.7197 61.7197 1.8000e-
003
1.7600e-
003
62.2899
Total 0.0306 0.1277 0.2899 1.1900e-
003
0.0988 1.2200e-
003
0.1000 0.0267 1.1500e-
003
0.0278 0.0000 111.4457 111.4457 2.3200e-
003
9.1300e-
003
114.2243
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8289 202.8289 0.0483 0.0000 204.0352
Total 0.1376 1.2587 1.4214 2.3600e-
003
0.0612 0.0612 0.0576 0.0576 0.0000 202.8289 202.8289 0.0483 0.0000 204.0352
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 15 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 3.6900e-
003
0.1089 0.0479 5.2000e-
004
7.9000e-
003
8.3000e-
004
8.7200e-
003
2.7200e-
003
7.9000e-
004
3.5100e-
003
0.0000 49.7260 49.7260 5.2000e-
004
7.3700e-
003
51.9344
Worker 0.0269 0.0188 0.2420 6.7000e-
004
0.0247 3.9000e-
004
0.0251 7.6900e-
003
3.6000e-
004
8.0500e-
003
0.0000 61.7197 61.7197 1.8000e-
003
1.7600e-
003
62.2899
Total 0.0306 0.1277 0.2899 1.1900e-
003
0.0326 1.2200e-
003
0.0338 0.0104 1.1500e-
003
0.0116 0.0000 111.4457 111.4457 2.3200e-
003
9.1300e-
003
114.2243
Mitigated Construction Off-Site
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.0103 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0269 20.0269 6.4800e-
003
0.0000 20.1888
Paving 7.0500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0174 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0269 20.0269 6.4800e-
003
0.0000 20.1888
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 16 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.2300e-
003
1.0000e-
005
1.2400e-
003
3.3000e-
004
1.0000e-
005
3.3000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Total 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
1.2300e-
003
1.0000e-
005
1.2400e-
003
3.3000e-
004
1.0000e-
005
3.3000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Off-Road 0.0103 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0268 20.0268 6.4800e-
003
0.0000 20.1888
Paving 7.0500e-
003
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 0.0174 0.1019 0.1458 2.3000e-
004
5.1000e-
003
5.1000e-
003
4.6900e-
003
4.6900e-
003
0.0000 20.0268 20.0268 6.4800e-
003
0.0000 20.1888
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 17 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
3.8000e-
004
1.0000e-
005
3.8000e-
004
1.2000e-
004
1.0000e-
005
1.2000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Total 4.1000e-
004
2.9000e-
004
3.7000e-
003
1.0000e-
005
3.8000e-
004
1.0000e-
005
3.8000e-
004
1.2000e-
004
1.0000e-
005
1.2000e-
004
0.0000 0.9447 0.9447 3.0000e-
005
3.0000e-
005
0.9534
Mitigated Construction Off-Site
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Archit. Coating 0.2410 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 1.9200e-
003
0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Total 0.2429 0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Unmitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 18 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 6.0000e-
004
4.2000e-
004
5.4300e-
003
2.0000e-
005
1.8100e-
003
1.0000e-
005
1.8200e-
003
4.8000e-
004
1.0000e-
005
4.9000e-
004
0.0000 1.3855 1.3855 4.0000e-
005
4.0000e-
005
1.3983
Total 6.0000e-
004
4.2000e-
004
5.4300e-
003
2.0000e-
005
1.8100e-
003
1.0000e-
005
1.8200e-
003
4.8000e-
004
1.0000e-
005
4.9000e-
004
0.0000 1.3855 1.3855 4.0000e-
005
4.0000e-
005
1.3983
Unmitigated Construction Off-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Archit. Coating 0.2410 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 1.9200e-
003
0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Total 0.2429 0.0130 0.0181 3.0000e-
005
7.1000e-
004
7.1000e-
004
7.1000e-
004
7.1000e-
004
0.0000 2.5533 2.5533 1.5000e-
004
0.0000 2.5571
Mitigated Construction On-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 19 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 6.0000e-
004
4.2000e-
004
5.4300e-
003
2.0000e-
005
5.5000e-
004
1.0000e-
005
5.6000e-
004
1.7000e-
004
1.0000e-
005
1.8000e-
004
0.0000 1.3855 1.3855 4.0000e-
005
4.0000e-
005
1.3983
Total 6.0000e-
004
4.2000e-
004
5.4300e-
003
2.0000e-
005
5.5000e-
004
1.0000e-
005
5.6000e-
004
1.7000e-
004
1.0000e-
005
1.8000e-
004
0.0000 1.3855 1.3855 4.0000e-
005
4.0000e-
005
1.3983
Mitigated Construction Off-Site
4.0 Operational Detail - Mobile
4.1 Mitigation Measures Mobile
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:53 PMPage 20 of 31
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 0.1408 0.1975 1.2612 2.7900e-
003
0.2920 2.3000e-
003
0.2943 0.0780 2.1600e-
003
0.0802 0.0000 257.5561 257.5561 0.0154 0.0139 262.0761
Unmitigated 0.1408 0.1975 1.2612 2.7900e-
003
0.2920 2.3000e-
003
0.2943 0.0780 2.1600e-
003
0.0802 0.0000 257.5561 257.5561 0.0154 0.0139 262.0761
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 349.28 352.98 316.35 771,971 771,971
Total 349.28 352.98 316.35 771,971 771,971
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Electricity
Mitigated
0.0000 0.0000 0.0000 0.0000 0.0000 25.3947 25.3947 4.4100e-
003
5.3000e-
004
25.6643
Electricity
Unmitigated
0.0000 0.0000 0.0000 0.0000 0.0000 25.3947 25.3947 4.4100e-
003
5.3000e-
004
25.6643
NaturalGas
Mitigated
5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
NaturalGas
Unmitigated
5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
5.1 Mitigation Measures Energy
Historical Energy Use: N
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.04662e
+006
5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
Total 5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr tons/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.04662e
+006
5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
Total 5.6400e-
003
0.0482 0.0205 3.1000e-
004
3.9000e-
003
3.9000e-
003
3.9000e-
003
3.9000e-
003
0.0000 55.8515 55.8515 1.0700e-
003
1.0200e-
003
56.1834
Mitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.3 Energy by Land Use - Electricity
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
294692 25.3947 4.4100e-
003
5.3000e-
004
25.6643
Total 25.3947 4.4100e-
003
5.3000e-
004
25.6643
Unmitigated
Electricity
Use
Total CO2 CH4 N2O CO2e
Land Use kWh/yr MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
294692 25.3947 4.4100e-
003
5.3000e-
004
25.6643
Total 25.3947 4.4100e-
003
5.3000e-
004
25.6643
Mitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category tons/yr MT/yr
Mitigated 0.3999 0.0263 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
Unmitigated 0.4194 0.0263 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
0.0241 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.2753 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 0.1118 0.0231 0.2289 6.7000e-
004
0.0348 0.0348 0.0348 0.0348 3.7817 23.3144 27.0962 0.0120 5.4000e-
004
27.5584
Landscaping 8.2600e-
003
3.1600e-
003
0.2747 1.0000e-
005
1.5200e-
003
1.5200e-
003
1.5200e-
003
1.5200e-
003
0.0000 0.4489 0.4489 4.3000e-
004
0.0000 0.4596
Total 0.4194 0.0262 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
Unmitigated
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory tons/yr MT/yr
Architectural
Coating
0.0241 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
0.2558 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 0.1118 0.0231 0.2289 6.7000e-
004
0.0348 0.0348 0.0348 0.0348 3.7817 23.3144 27.0962 0.0120 5.4000e-
004
27.5584
Landscaping 8.2600e-
003
3.1600e-
003
0.2747 1.0000e-
005
1.5200e-
003
1.5200e-
003
1.5200e-
003
1.5200e-
003
0.0000 0.4489 0.4489 4.3000e-
004
0.0000 0.4596
Total 0.3999 0.0262 0.5035 6.8000e-
004
0.0363 0.0363 0.0363 0.0363 3.7817 23.7633 27.5450 0.0125 5.4000e-
004
28.0181
Mitigated
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Total CO2 CH4 N2O CO2e
Category MT/yr
Mitigated 4.1421 0.0635 1.5600e-
003
6.1928
Unmitigated 4.9248 0.0793 1.9400e-
003
7.4855
7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
Other Asphalt
Surfaces
0 / 0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
2.4107 /
1.51979
4.9248 0.0793 1.9400e-
003
7.4855
Total 4.9248 0.0793 1.9400e-
003
7.4855
Unmitigated
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
7.2 Water by Land Use
Indoor/Out
door Use
Total CO2 CH4 N2O CO2e
Land Use Mgal MT/yr
Other Asphalt
Surfaces
0 / 0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
1.92856 /
1.42708
4.1421 0.0635 1.5600e-
003
6.1928
Total 4.1421 0.0635 1.5600e-
003
6.1928
Mitigated
8.1 Mitigation Measures Waste
8.0 Waste Detail
Total CO2 CH4 N2O CO2e
MT/yr
Mitigated 8.0730 0.4771 0.0000 20.0004
Unmitigated 8.0730 0.4771 0.0000 20.0004
Category/Year
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Annual
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
8.2 Waste by Land Use
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
39.77 8.0730 0.4771 0.0000 20.0004
Total 8.0730 0.4771 0.0000 20.0004
Unmitigated
Waste
Disposed
Total CO2 CH4 N2O CO2e
Land Use tons MT/yr
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
39.77 8.0730 0.4771 0.0000 20.0004
Total 8.0730 0.4771 0.0000 20.0004
Mitigated
9.0 Operational Offroad
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix F – CalEEMod Summer Emissions Report –
37 Lots
TTM No. 38083 Addendum - 37 Lots
Riverside-Salton Sea County, Summer
Project Characteristics - This model applies to the proposed TTM condition involving 37 single-family residential lots.
Land Use - The proposed project would involve 37 lots with a total area of 19.55 AC. The estimated population is rounded up from the CDF household size of
2.60. The associated roads and open space are represented as other asphalt surfaces.
Construction Phase - Default construction time frames are accepted. No structural demolition would be involved.
Architectural Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Area Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - Dust control compliance with SCAQMD Rule 403/403.1 is mandatory and not considered mitigation.
Mobile Land Use Mitigation -
Area Mitigation - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 37.00 Dwelling Unit 19.55 66,600.00 97
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 80
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 12.01 19.55
tblLandUse Population 106.00 97.00
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6926 38.8842 29.6608 0.0636 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1199 6,216.042
0
2023 24.3560 15.7744 19.9757 0.0411 1.1478 0.7137 1.8615 0.3093 0.6716 0.9809 0.0000 4,019.131
5
4,019.131
5
0.7170 0.1140 4,069.007
3
Maximum 24.3560 38.8842 29.6608 0.0636 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1199 6,216.042
0
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6926 38.8842 29.6608 0.0636 6.5622 1.6357 8.1755 3.3632 1.5049 4.8475 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1199 6,216.042
0
2023 24.3560 15.7744 19.9757 0.0411 0.3764 0.7137 1.0900 0.1199 0.6716 0.7915 0.0000 4,019.131
5
4,019.131
5
0.7170 0.1140 4,069.007
3
Maximum 24.3560 38.8842 29.6608 0.0636 6.5622 1.6357 8.1755 3.3632 1.5049 4.8475 0.0000 6,166.099
8
6,166.099
8
1.9486 0.1199 6,216.042
0
Mitigated Construction
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 66.89 0.00 60.20 66.67 0.00 55.27 0.00 0.00 0.00 0.00 0.00 0.00
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 4.4582 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Energy 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mobile 0.9406 1.0437 7.6359 0.0166 1.6683 0.0129 1.6812 0.4451 0.0121 0.4572 1,689.606
4
1,689.606
4
0.0921 0.0838 1,716.886
3
Total 5.4296 1.9061 16.3818 0.0347 1.6683 0.8992 2.5675 0.4451 0.8984 1.3434 101.6746 2,659.273
8
2,760.948
4
0.4271 0.1046 2,802.793
2
Unmitigated Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 4.3516 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Energy 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mobile 0.9406 1.0437 7.6359 0.0166 1.6683 0.0129 1.6812 0.4451 0.0121 0.4572 1,689.606
4
1,689.606
4
0.0921 0.0838 1,716.886
3
Total 5.3231 1.9061 16.3818 0.0347 1.6683 0.8992 2.5675 0.4451 0.8984 1.3434 101.6746 2,659.273
8
2,760.948
4
0.4271 0.1046 2,802.793
2
Mitigated Operational
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
1.96 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Residential Indoor: 134,865; Residential Outdoor: 44,955; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 6 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 112.00 42.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 22.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 7 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 19.6570 0.0000 19.6570 10.1025 0.0000 10.1025 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 19.6570 1.6126 21.2696 10.1025 1.4836 11.5860 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0610 0.0366 0.5574 1.3800e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Total 0.0610 0.0366 0.5574 1.3800e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 8 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 6.5163 0.0000 6.5163 3.3490 0.0000 3.3490 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 6.5163 1.6126 8.1289 3.3490 1.4836 4.8325 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0610 0.0366 0.5574 1.3800e-
003
0.0459 7.7000e-
004
0.0467 0.0142 7.1000e-
004
0.0150 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Total 0.0610 0.0366 0.5574 1.3800e-
003
0.0459 7.7000e-
004
0.0467 0.0142 7.1000e-
004
0.0150 139.2203 139.2203 3.9800e-
003
3.7000e-
003
140.4236
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 9 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 9.2036 0.0000 9.2036 3.6538 0.0000 3.6538 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 9.2036 1.6349 10.8385 3.6538 1.5041 5.1579 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0678 0.0407 0.6193 1.5300e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Total 0.0678 0.0407 0.6193 1.5300e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 10 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 3.0510 0.0000 3.0510 1.2112 0.0000 1.2112 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 3.0510 1.6349 4.6859 1.2112 1.5041 2.7153 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0678 0.0407 0.6193 1.5300e-
003
0.0510 8.6000e-
004
0.0519 0.0158 7.9000e-
004
0.0166 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Total 0.0678 0.0407 0.6193 1.5300e-
003
0.0510 8.6000e-
004
0.0519 0.0158 7.9000e-
004
0.0166 154.6893 154.6893 4.4200e-
003
4.1200e-
003
156.0262
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 11 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0605 1.5064 0.5747 6.1500e-
003
0.2108 0.0202 0.2309 0.0607 0.0193 0.0800 651.6021 651.6021 7.1400e-
003
0.0968 680.6278
Worker 0.3795 0.2280 3.4681 8.5700e-
003
0.9371 4.8000e-
003
0.9419 0.2486 4.4200e-
003
0.2530 866.2599 866.2599 0.0248 0.0231 873.7467
Total 0.4400 1.7344 4.0428 0.0147 1.1478 0.0250 1.1728 0.3093 0.0237 0.3330 1,517.862
0
1,517.862
0
0.0319 0.1199 1,554.374
6
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 12 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0605 1.5064 0.5747 6.1500e-
003
0.0908 0.0202 0.1110 0.0313 0.0193 0.0506 651.6021 651.6021 7.1400e-
003
0.0968 680.6278
Worker 0.3795 0.2280 3.4681 8.5700e-
003
0.2855 4.8000e-
003
0.2903 0.0886 4.4200e-
003
0.0931 866.2599 866.2599 0.0248 0.0231 873.7467
Total 0.4400 1.7344 4.0428 0.0147 0.3764 0.0250 0.4013 0.1199 0.0237 0.1436 1,517.862
0
1,517.862
0
0.0319 0.1199 1,554.374
6
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 13 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0440 1.1874 0.5384 5.9000e-
003
0.2108 9.4200e-
003
0.2202 0.0607 9.0100e-
003
0.0697 625.6276 625.6276 6.6400e-
003
0.0926 653.3962
Worker 0.3515 0.2020 3.1933 8.2900e-
003
0.9371 4.5100e-
003
0.9416 0.2486 4.1500e-
003
0.2527 838.2940 838.2940 0.0223 0.0213 845.2050
Total 0.3955 1.3895 3.7317 0.0142 1.1478 0.0139 1.1618 0.3093 0.0132 0.3224 1,463.921
6
1,463.921
6
0.0290 0.1140 1,498.601
2
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 14 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0440 1.1874 0.5384 5.9000e-
003
0.0908 9.4200e-
003
0.1003 0.0313 9.0100e-
003
0.0403 625.6276 625.6276 6.6400e-
003
0.0926 653.3962
Worker 0.3515 0.2020 3.1933 8.2900e-
003
0.2855 4.5100e-
003
0.2901 0.0886 4.1500e-
003
0.0928 838.2940 838.2940 0.0223 0.0213 845.2050
Total 0.3955 1.3895 3.7317 0.0142 0.3764 0.0139 0.3903 0.1199 0.0132 0.1331 1,463.921
6
1,463.921
6
0.0290 0.1140 1,498.601
2
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 15 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0471 0.0271 0.4277 1.1100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Total 0.0471 0.0271 0.4277 1.1100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 16 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0471 0.0271 0.4277 1.1100e-
003
0.0382 6.0000e-
004
0.0389 0.0119 5.6000e-
004
0.0124 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Total 0.0471 0.0271 0.4277 1.1100e-
003
0.0382 6.0000e-
004
0.0389 0.0119 5.6000e-
004
0.0124 112.2715 112.2715 2.9900e-
003
2.8600e-
003
113.1971
Mitigated Construction Off-Site
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 24.0953 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Total 24.2869 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0690 0.0397 0.6273 1.6300e-
003
0.1841 8.9000e-
004
0.1850 0.0488 8.2000e-
004
0.0496 164.6649 164.6649 4.3800e-
003
4.1900e-
003
166.0224
Total 0.0690 0.0397 0.6273 1.6300e-
003
0.1841 8.9000e-
004
0.1850 0.0488 8.2000e-
004
0.0496 164.6649 164.6649 4.3800e-
003
4.1900e-
003
166.0224
Unmitigated Construction Off-Site
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 24.0953 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Total 24.2869 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0690 0.0397 0.6273 1.6300e-
003
0.0561 8.9000e-
004
0.0570 0.0174 8.2000e-
004
0.0182 164.6649 164.6649 4.3800e-
003
4.1900e-
003
166.0224
Total 0.0690 0.0397 0.6273 1.6300e-
003
0.0561 8.9000e-
004
0.0570 0.0174 8.2000e-
004
0.0182 164.6649 164.6649 4.3800e-
003
4.1900e-
003
166.0224
Mitigated Construction Off-Site
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.9406 1.0437 7.6359 0.0166 1.6683 0.0129 1.6812 0.4451 0.0121 0.4572 1,689.606
4
1,689.606
4
0.0921 0.0838 1,716.886
3
Unmitigated 0.9406 1.0437 7.6359 0.0166 1.6683 0.0129 1.6812 0.4451 0.0121 0.4572 1,689.606
4
1,689.606
4
0.0921 0.0838 1,716.886
3
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 349.28 352.98 316.35 771,971 771,971
Total 349.28 352.98 316.35 771,971 771,971
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
NaturalGas
Unmitigated
0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
5.1 Mitigation Measures Energy
Historical Energy Use: N
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
2867.44 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Total 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
2.86744 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Total 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mitigated
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 4.3516 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Unmitigated 4.4582 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.1320 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
1.5083 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 2.7261 0.5630 5.5816 0.0163 0.8479 0.8479 0.8479 0.8479 101.6746 626.8235 728.4982 0.3232 0.0146 740.9264
Landscaping 0.0918 0.0352 3.0518 1.6000e-
004
0.0169 0.0169 0.0169 0.0169 5.4976 5.4976 5.2800e-
003
5.6295
Total 4.4582 0.5981 8.6334 0.0164 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:51 PMPage 24 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Summer
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.1320 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
1.4017 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 2.7261 0.5630 5.5816 0.0163 0.8479 0.8479 0.8479 0.8479 101.6746 626.8235 728.4982 0.3232 0.0146 740.9264
Landscaping 0.0918 0.0352 3.0518 1.6000e-
004
0.0169 0.0169 0.0169 0.0169 5.4976 5.4976 5.2800e-
003
5.6295
Total 4.3516 0.5981 8.6334 0.0164 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Mitigated
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix G – CalEEMod Winter Emissions Report –
37 Lots
TTM No. 38083 Addendum - 37 Lots
Riverside-Salton Sea County, Winter
Project Characteristics - This model applies to the proposed TTM condition involving 37 single-family residential lots.
Land Use - The proposed project would involve 37 lots with a total area of 19.55 AC. The estimated population is rounded up from the CDF household size of
2.60. The associated roads and open space are represented as other asphalt surfaces.
Construction Phase - Default construction time frames are accepted. No structural demolition would be involved.
Architectural Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Area Coating - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Construction Off-road Equipment Mitigation - Dust control compliance with SCAQMD Rule 403/403.1 is mandatory and not considered mitigation.
Mobile Land Use Mitigation -
Area Mitigation - The project would be required to comply with SCAQMD Rule 1113 pertaining to VOC content limits in architectural coatings.
Water Mitigation -
1.1 Land Usage
Land Uses Size Metric Lot Acreage Floor Surface Area Population
Single Family Housing 37.00 Dwelling Unit 19.55 66,600.00 97
Other Asphalt Surfaces 5.38 Acre 5.38 234,352.80 0
1.2 Other Project Characteristics
Urbanization
Climate Zone
Urban
15
Wind Speed (m/s)Precipitation Freq (Days)2.4 28
1.3 User Entered Comments & Non-Default Data
1.0 Project Characteristics
Utility Company Imperial Irrigation District
2024Operational Year
CO2 Intensity
(lb/MWhr)
189.98 0.033CH4 Intensity
(lb/MWhr)
0.004N2O Intensity
(lb/MWhr)
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.0 Emissions Summary
Table Name Column Name Default Value New Value
tblArchitecturalCoating EF_Parking 250.00 100.00
tblArchitecturalCoating EF_Residential_Exterior 250.00 50.00
tblArchitecturalCoating EF_Residential_Interior 250.00 50.00
tblAreaCoating Area_EF_Parking 250 100
tblAreaCoating Area_EF_Residential_Exterior 250 50
tblAreaCoating Area_EF_Residential_Interior 250 50
tblAreaMitigation UseLowVOCPaintParkingCheck False True
tblConstDustMitigation CleanPavedRoadPercentReduction 0 80
tblConstDustMitigation WaterUnpavedRoadMoistureContent 0 50
tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15
tblLandUse LotAcreage 12.01 19.55
tblLandUse Population 106.00 97.00
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.1 Overall Construction (Maximum Daily Emission)
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6867 38.8857 29.5511 0.0635 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1206 6,201.570
1
2023 24.3501 15.8553 19.4360 0.0404 1.1478 0.7137 1.8615 0.3093 0.6716 0.9809 0.0000 3,942.714
7
3,942.714
7
0.7170 0.1148 3,992.859
3
Maximum 24.3501 38.8857 29.5511 0.0635 19.8076 1.6357 21.4210 10.1424 1.5049 11.6267 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1206 6,201.570
1
Unmitigated Construction
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Year lb/day lb/day
2022 3.6867 38.8857 29.5511 0.0635 6.5622 1.6357 8.1755 3.3632 1.5049 4.8475 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1206 6,201.570
1
2023 24.3501 15.8553 19.4360 0.0404 0.3764 0.7137 1.0901 0.1199 0.6716 0.7915 0.0000 3,942.714
7
3,942.714
7
0.7170 0.1148 3,992.859
2
Maximum 24.3501 38.8857 29.5511 0.0635 6.5622 1.6357 8.1755 3.3632 1.5049 4.8475 0.0000 6,151.596
4
6,151.596
4
1.9487 0.1206 6,201.570
1
Mitigated Construction
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
0.00 0.00 0.00 0.00 66.89 0.00 60.20 66.67 0.00 55.27 0.00 0.00 0.00 0.00 0.00 0.00
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
2.2 Overall Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 4.4582 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Energy 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mobile 0.7816 1.1068 6.8919 0.0154 1.6683 0.0130 1.6813 0.4451 0.0121 0.4572 1,571.193
4
1,571.193
4
0.0958 0.0856 1,599.106
3
Total 5.2707 1.9691 15.6378 0.0336 1.6683 0.8992 2.5675 0.4451 0.8984 1.3434 101.6746 2,540.860
8
2,642.535
4
0.4308 0.1064 2,685.013
2
Unmitigated Operational
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Area 4.3516 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Energy 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mobile 0.7816 1.1068 6.8919 0.0154 1.6683 0.0130 1.6813 0.4451 0.0121 0.4572 1,571.193
4
1,571.193
4
0.0958 0.0856 1,599.106
3
Total 5.1642 1.9691 15.6378 0.0336 1.6683 0.8992 2.5675 0.4451 0.8984 1.3434 101.6746 2,540.860
8
2,642.535
4
0.4308 0.1064 2,685.013
2
Mitigated Operational
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.0 Construction Detail
Construction Phase
Phase
Number
Phase Name Phase Type Start Date End Date Num Days
Week
Num Days Phase Description
1 Site Preparation Site Preparation 1/29/2022 2/11/2022 5 10
2 Grading Grading 2/12/2022 4/1/2022 5 35
3 Building Construction Building Construction 4/2/2022 9/1/2023 5 370
4 Paving Paving 9/2/2023 9/29/2023 5 20
5 Architectural Coating Architectural Coating 9/30/2023 10/27/2023 5 20
OffRoad Equipment
Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor
Architectural Coating Air Compressors 1 6.00 78 0.48
Building Construction Cranes 1 7.00 231 0.29
Grading Excavators 2 8.00 158 0.38
Building Construction Forklifts 3 8.00 89 0.20
Building Construction Generator Sets 1 8.00 84 0.74
Grading Graders 1 8.00 187 0.41
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e
Percent
Reduction
2.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Residential Indoor: 134,865; Residential Outdoor: 44,955; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 14,061
(Architectural Coating – sqft)
Acres of Grading (Site Preparation Phase): 15
Acres of Grading (Grading Phase): 105
Acres of Paving: 5.38
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 6 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.1 Mitigation Measures Construction
Use Soil Stabilizer
Replace Ground Cover
Water Exposed Area
Water Unpaved Roads
Reduce Vehicle Speed on Unpaved Roads
Clean Paved Roads
Paving Pavers 2 8.00 130 0.42
Paving Paving Equipment 2 8.00 132 0.36
Paving Rollers 2 8.00 80 0.38
Grading Rubber Tired Dozers 1 8.00 247 0.40
Site Preparation Rubber Tired Dozers 3 8.00 247 0.40
Grading Scrapers 2 8.00 367 0.48
Building Construction Tractors/Loaders/Backhoes 3 7.00 97 0.37
Grading Tractors/Loaders/Backhoes 2 8.00 97 0.37
Site Preparation Tractors/Loaders/Backhoes 4 8.00 97 0.37
Building Construction Welders 1 8.00 46 0.45
Trips and VMT
Phase Name Offroad Equipment
Count
Worker Trip
Number
Vendor Trip
Number
Hauling Trip
Number
Worker Trip
Length
Vendor Trip
Length
Hauling Trip
Length
Worker Vehicle
Class
Vendor
Vehicle Class
Hauling
Vehicle Class
Site Preparation 7 18.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Grading 8 20.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Building Construction 9 112.00 42.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Paving 6 15.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
Architectural Coating 1 22.00 0.00 0.00 11.00 5.40 20.00 LD_Mix HDT_Mix HHDT
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 7 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 19.6570 0.0000 19.6570 10.1025 0.0000 10.1025 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 19.6570 1.6126 21.2696 10.1025 1.4836 11.5860 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0557 0.0380 0.4586 1.2500e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Total 0.0557 0.0380 0.4586 1.2500e-
003
0.1506 7.7000e-
004
0.1514 0.0400 7.1000e-
004
0.0407 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 8 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.2 Site Preparation - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 6.5163 0.0000 6.5163 3.3490 0.0000 3.3490 0.0000 0.0000
Off-Road 3.1701 33.0835 19.6978 0.0380 1.6126 1.6126 1.4836 1.4836 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Total 3.1701 33.0835 19.6978 0.0380 6.5163 1.6126 8.1289 3.3490 1.4836 4.8325 0.0000 3,686.061
9
3,686.061
9
1.1922 3,715.865
5
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0557 0.0380 0.4586 1.2500e-
003
0.0459 7.7000e-
004
0.0467 0.0142 7.1000e-
004
0.0150 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Total 0.0557 0.0380 0.4586 1.2500e-
003
0.0459 7.7000e-
004
0.0467 0.0142 7.1000e-
004
0.0150 126.1673 126.1673 4.0400e-
003
3.7900e-
003
127.3988
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 9 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 9.2036 0.0000 9.2036 3.6538 0.0000 3.6538 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 9.2036 1.6349 10.8385 3.6538 1.5041 5.1579 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0618 0.0423 0.5096 1.3900e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Total 0.0618 0.0423 0.5096 1.3900e-
003
0.1673 8.6000e-
004
0.1682 0.0444 7.9000e-
004
0.0452 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 10 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.3 Grading - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Fugitive Dust 3.0510 0.0000 3.0510 1.2112 0.0000 1.2112 0.0000 0.0000
Off-Road 3.6248 38.8435 29.0415 0.0621 1.6349 1.6349 1.5041 1.5041 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Total 3.6248 38.8435 29.0415 0.0621 3.0510 1.6349 4.6859 1.2112 1.5041 2.7153 0.0000 6,011.410
5
6,011.410
5
1.9442 6,060.015
8
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0618 0.0423 0.5096 1.3900e-
003
0.0510 8.6000e-
004
0.0519 0.0158 7.9000e-
004
0.0166 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Total 0.0618 0.0423 0.5096 1.3900e-
003
0.0510 8.6000e-
004
0.0519 0.0158 7.9000e-
004
0.0166 140.1859 140.1859 4.4900e-
003
4.2100e-
003
141.5542
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 11 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0575 1.5874 0.5988 6.1600e-
003
0.2108 0.0202 0.2310 0.0607 0.0194 0.0801 652.4865 652.4865 7.0100e-
003
0.0970 681.5712
Worker 0.3463 0.2367 2.8536 7.7700e-
003
0.9371 4.8000e-
003
0.9419 0.2486 4.4200e-
003
0.2530 785.0409 785.0409 0.0252 0.0236 792.7038
Total 0.4038 1.8241 3.4524 0.0139 1.1478 0.0250 1.1729 0.3093 0.0238 0.3330 1,437.527
4
1,437.527
4
0.0322 0.1206 1,474.275
0
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 12 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2022
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Total 1.7062 15.6156 16.3634 0.0269 0.8090 0.8090 0.7612 0.7612 0.0000 2,554.333
6
2,554.333
6
0.6120 2,569.632
2
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0575 1.5874 0.5988 6.1600e-
003
0.0908 0.0202 0.1111 0.0313 0.0194 0.0506 652.4865 652.4865 7.0100e-
003
0.0970 681.5712
Worker 0.3463 0.2367 2.8536 7.7700e-
003
0.2855 4.8000e-
003
0.2903 0.0886 4.4200e-
003
0.0931 785.0409 785.0409 0.0252 0.0236 792.7038
Total 0.4038 1.8241 3.4524 0.0139 0.3764 0.0250 0.4014 0.1199 0.0238 0.1437 1,437.527
4
1,437.527
4
0.0322 0.1206 1,474.275
0
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 13 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0405 1.2607 0.5577 5.9200e-
003
0.2108 9.4600e-
003
0.2202 0.0607 9.0500e-
003
0.0698 627.5593 627.5593 6.4800e-
003
0.0930 655.4336
Worker 0.3216 0.2097 2.6343 7.5200e-
003
0.9371 4.5100e-
003
0.9416 0.2486 4.1500e-
003
0.2527 759.9455 759.9455 0.0227 0.0218 767.0196
Total 0.3621 1.4704 3.1920 0.0134 1.1478 0.0140 1.1618 0.3093 0.0132 0.3225 1,387.504
8
1,387.504
8
0.0292 0.1148 1,422.453
2
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 14 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.4 Building Construction - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Total 1.5728 14.3849 16.2440 0.0269 0.6997 0.6997 0.6584 0.6584 0.0000 2,555.209
9
2,555.209
9
0.6079 2,570.406
1
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0405 1.2607 0.5577 5.9200e-
003
0.0908 9.4600e-
003
0.1003 0.0313 9.0500e-
003
0.0403 627.5593 627.5593 6.4800e-
003
0.0930 655.4336
Worker 0.3216 0.2097 2.6343 7.5200e-
003
0.2855 4.5100e-
003
0.2901 0.0886 4.1500e-
003
0.0928 759.9455 759.9455 0.0227 0.0218 767.0196
Total 0.3621 1.4704 3.1920 0.0134 0.3764 0.0140 0.3903 0.1199 0.0132 0.1331 1,387.504
8
1,387.504
8
0.0292 0.1148 1,422.453
2
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 15 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0431 0.0281 0.3528 1.0100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Total 0.0431 0.0281 0.3528 1.0100e-
003
0.1255 6.0000e-
004
0.1261 0.0333 5.6000e-
004
0.0338 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Unmitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 16 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.5 Paving - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Off-Road 1.0327 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Paving 0.7048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Total 1.7375 10.1917 14.5842 0.0228 0.5102 0.5102 0.4694 0.4694 0.0000 2,207.584
1
2,207.584
1
0.7140 2,225.433
6
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0431 0.0281 0.3528 1.0100e-
003
0.0382 6.0000e-
004
0.0389 0.0119 5.6000e-
004
0.0124 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Total 0.0431 0.0281 0.3528 1.0100e-
003
0.0382 6.0000e-
004
0.0389 0.0119 5.6000e-
004
0.0124 101.7784 101.7784 3.0500e-
003
2.9200e-
003
102.7258
Mitigated Construction Off-Site
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 24.0953 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Total 24.2869 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 281.4481 281.4481 0.0168 281.8690
Unmitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0632 0.0412 0.5175 1.4800e-
003
0.1841 8.9000e-
004
0.1850 0.0488 8.2000e-
004
0.0496 149.2750 149.2750 4.4700e-
003
4.2900e-
003
150.6646
Total 0.0632 0.0412 0.5175 1.4800e-
003
0.1841 8.9000e-
004
0.1850 0.0488 8.2000e-
004
0.0496 149.2750 149.2750 4.4700e-
003
4.2900e-
003
150.6646
Unmitigated Construction Off-Site
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
3.6 Architectural Coating - 2023
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Archit. Coating 24.0953 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Off-Road 0.1917 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Total 24.2869 1.3030 1.8111 2.9700e-
003
0.0708 0.0708 0.0708 0.0708 0.0000 281.4481 281.4481 0.0168 281.8690
Mitigated Construction On-Site
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Worker 0.0632 0.0412 0.5175 1.4800e-
003
0.0561 8.9000e-
004
0.0570 0.0174 8.2000e-
004
0.0182 149.2750 149.2750 4.4700e-
003
4.2900e-
003
150.6646
Total 0.0632 0.0412 0.5175 1.4800e-
003
0.0561 8.9000e-
004
0.0570 0.0174 8.2000e-
004
0.0182 149.2750 149.2750 4.4700e-
003
4.2900e-
003
150.6646
Mitigated Construction Off-Site
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 19 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
4.0 Operational Detail - Mobile
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 0.7816 1.1068 6.8919 0.0154 1.6683 0.0130 1.6813 0.4451 0.0121 0.4572 1,571.193
4
1,571.193
4
0.0958 0.0856 1,599.106
3
Unmitigated 0.7816 1.1068 6.8919 0.0154 1.6683 0.0130 1.6813 0.4451 0.0121 0.4572 1,571.193
4
1,571.193
4
0.0958 0.0856 1,599.106
3
4.1 Mitigation Measures Mobile
4.2 Trip Summary Information
4.3 Trip Type Information
Average Daily Trip Rate Unmitigated Mitigated
Land Use Weekday Saturday Sunday Annual VMT Annual VMT
Other Asphalt Surfaces 0.00 0.00 0.00
Single Family Housing 349.28 352.98 316.35 771,971 771,971
Total 349.28 352.98 316.35 771,971 771,971
Miles Trip %Trip Purpose %
Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by
Other Asphalt Surfaces 12.50 4.20 5.40 0.00 0.00 0.00 0 0 0
Single Family Housing 11.00 3.50 4.50 40.20 19.20 40.60 86 11 3
4.4 Fleet Mix
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TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH
Other Asphalt Surfaces 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
Single Family Housing 0.537845 0.056225 0.173186 0.138405 0.025906 0.007191 0.011447 0.018769 0.000611 0.000309 0.023821 0.001097 0.005189
5.0 Energy Detail
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
NaturalGas
Mitigated
0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
NaturalGas
Unmitigated
0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
5.1 Mitigation Measures Energy
Historical Energy Use: N
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EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.0 Area Detail
5.2 Energy by Land Use - NaturalGas
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
2867.44 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Total 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Unmitigated
NaturalGa
s Use
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Land Use kBTU/yr lb/day lb/day
Other Asphalt
Surfaces
0 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Single Family
Housing
2.86744 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Total 0.0309 0.2643 0.1125 1.6900e-
003
0.0214 0.0214 0.0214 0.0214 337.3463 337.3463 6.4700e-
003
6.1800e-
003
339.3509
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 22 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Use Low VOC Paint - Residential Interior
Use Low VOC Paint - Residential Exterior
Use Low VOC Cleaning Supplies
6.1 Mitigation Measures Area
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
Category lb/day lb/day
Mitigated 4.3516 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Unmitigated 4.4582 0.5981 8.6334 0.0165 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 23 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.1320 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
1.5083 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 2.7261 0.5630 5.5816 0.0163 0.8479 0.8479 0.8479 0.8479 101.6746 626.8235 728.4982 0.3232 0.0146 740.9264
Landscaping 0.0918 0.0352 3.0518 1.6000e-
004
0.0169 0.0169 0.0169 0.0169 5.4976 5.4976 5.2800e-
003
5.6295
Total 4.4582 0.5981 8.6334 0.0164 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Unmitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 24 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
Install Low Flow Bathroom Faucet
Install Low Flow Kitchen Faucet
Install Low Flow Toilet
Install Low Flow Shower
Turf Reduction
Use Water Efficient Irrigation System
7.1 Mitigation Measures Water
7.0 Water Detail
6.2 Area by SubCategory
ROG NOx CO SO2 Fugitive
PM10
Exhaust
PM10
PM10
Total
Fugitive
PM2.5
Exhaust
PM2.5
PM2.5
Total
Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e
SubCategory lb/day lb/day
Architectural
Coating
0.1320 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Consumer
Products
1.4017 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Hearth 2.7261 0.5630 5.5816 0.0163 0.8479 0.8479 0.8479 0.8479 101.6746 626.8235 728.4982 0.3232 0.0146 740.9264
Landscaping 0.0918 0.0352 3.0518 1.6000e-
004
0.0169 0.0169 0.0169 0.0169 5.4976 5.4976 5.2800e-
003
5.6295
Total 4.3516 0.5981 8.6334 0.0164 0.8649 0.8649 0.8649 0.8649 101.6746 632.3211 733.9958 0.3285 0.0146 746.5560
Mitigated
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 25 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
11.0 Vegetation
8.1 Mitigation Measures Waste
8.0 Waste Detail
9.0 Operational Offroad
Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type
10.0 Stationary Equipment
Fire Pumps and Emergency Generators
Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type
Boilers
Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type
User Defined Equipment
Equipment Type Number
CalEEMod Version: CalEEMod.2020.4.0 Date: 10/7/2021 6:52 PMPage 26 of 26
TTM No. 38083 Addendum - 37 Lots - Riverside-Salton Sea County, Winter
EMFAC Off-Model Adjustment Factors for Gasoline Light Duty Vehicle to Account for the SAFE Vehicle Rule Not Applied
TTM No. 38083 City of La Quinta
Draft Addendum October 2021
Appendix H – TTM No. 38083 VMT Screening and Trip
Generation/Access Assessment
14041‐02 VMT Screening and Access Assessment.docx
December 21, 2021 (Revised) / November 2, 2021
Mr. Jon Myhre
CADO La Quinta Estates, LLC
c/o Mr. Mark Hayden
Capstone Advisors
1545 Faraday Avenue
Carlsbad, CA 92008
SUBJECT: TTM 38083 VMT SCREENING AND TRIP GENERATION/ACCESS ASSESSMENT
Dear Mr. Jon Myhre:
The firm of Urban Crossroads, Inc. is pleased to submit this VMT Screening and Trip Generation/Access
Assessment for Tentative Tract Map 38083 (“Project”) in the City of La Quinta. The Project proposes to
subdivide 20 existing 1‐acre residential lots into 37 half‐acre lots within the Griffin Ranch Specific Plan
area. The single family lots are located along Seattle Slew Way and Afleet Alex Way, and the existing use
is vacant infill land.
The 20 lots are currently graded with existing utility and road infrastructure previously installed and are
centrally located within the Griffin Ranch Community adjacent to the Merv Griffin Estate. A preliminary
site plan for the proposed Project is shown on Exhibit 1. Exhibit 2 depicts the location of the proposed
37 half‐acre lots in relation to the existing roadway network.
VEHICLE MILES TRAVELED (VMT)
Changes to California Environmental Quality Act (CEQA) Guidelines were adopted in December 2018,
which require all lead agencies to adopt VMT as a replacement for automobile delay‐based level of
service (LOS) as the new measure for identifying transportation impacts for land use projects. This
statewide mandate went into effect July 1, 2020. To aid in this transition, the Governor’s Office of
Planning and Research (OPR) released a Technical Advisory on Evaluating Transportation Impacts in
CEQA (December of 2018) (Technical Advisory).
Planning Commission Resolution 2021‐007 (July 13, 2021) adopts Revision 1 of the City of La Quinta
Vehicle Miles Traveled Analysis Policy (City Guidelines). The City Guidelines set forth screening criteria
under which Projects are not required to submit detailed VMT analysis. This guidance for determination
of non‐significant VMT impact is primarily intended to avoid unnecessary analysis and findings that
would be inconsistent with the intent of SB 743. VMT screening criteria for development projects include
the following:
37
29,181 SF
A
A
N 19°29'04" W
45.69'
∆=00°34'49"
R=500.00'
5.06'
36
24,187 SF
35
25,280 SF
34
25,550 SF
33
21,580 SF
32
23,722 SF
31
24,706 SF
30
22,656 SF
29
21,662 SF
28
21,029 SF
27
27,161 SF
26
25,961 SF
25
29,832 SF24
21,416 SF
23
22,680 SF22
20,579 SF21
20,831 SF
20
21,036 SF
19
20,443 SF
18
20,517 SF17
21,111 SF
16
21,602 SF
15
29,787 SF
14
22,397 SF
13
24,437 SF
12
29,176 SF
11
21,755 SF
10
22,316 SF
9
20,878 SF
8
20,320 SF
7
22,062 SF
6
22,435 SF
5
22,355 SF
4
20,926 SF
3
20,060 SF
2
20,057 SF
1
20,027 SF
SEATTLE SLEW WAY
CANANERO
DONALI STREET
BOLD RULER WAY
R
= 1
3
0'R = 500'
R = 500'
R = 500'
R = 500'R = 500'
R = 500'R = 500'R = 500'R = 500'R = 500'R = 500'R = 130'R = 300'R = 200'R = 500'R = 500'R = 500'R = 500'R = 300'ALYSHEBA DRIVER = 500'SEATTLE SLEW WAYGIACOMO WAY
ALYSHEBA DRIVEME
R
V
G
R
I
F
F
I
N
W
A
Y
M E R V G R IFFIN W A Y MERV GRIFFIN WAYSECRETARIATHAFLINGER WAY
WAR
AVENUE 54
CIRCLE
AD
M
I
R
A
LAFLEET ALEX WAYLOT "A"
96,915 SF
2.23 AC.
LOT "A"
LOT "A"
LOT "A"
LOT "A"DRIVEN 89°46'52" E 258.14'N 02°05'21" W 429.31'N 02°05'21" W 1242.12'N 02°12'16" E 291.53'N 89°49'26" E 1316.79'
N 79°12'50
"
W
9
8
.
6
1
'N 23°58'52" E 150.00'N 6
6
°
0
1
'
0
8
"
W
1
9
8
.
5
7
'
N 89°39'37" E 485.30'N 02°02'50" W 1243.08'N 00°13'15" W 403.65'N 89°46'45" E 267.34'
N 66°01'08" W
10.36'=21°36'39" R=629.50' 237.43'=23°36'32" R=620.50' 255.68'=15°03'08" R=670.50' 176.15'N 03°50'19" E 6.89'
∆=86°32'01"
R=24.50'
37.00'
∆=30°44'15"
R=214.50'
115.07'
=16°08'29"R=970.50'273.41'=16°08'29" R=970.50' 273.41'=21°05'38"R=670.50' 246.85'=12°58'01" R=970.50' 219.64'=21°05'38" R=670.50' 246.85'∆=24°19'15"
R=330.00'
140.08'∆=06°18'00"
R=429.50'
47.23'
∆=21°41'20"
R=329.50'
124.73'
∆=21°31'02"
R=329.50'
123.74'
∆=10°45'31"
R=670.50'
125.90'
29'23'10'29'29'29'23'23'
29'23'
B
B
B
B10'29'10'A
A
A A
EX. PROJECT BOUNDARY EX. PROJECT BOUNDARY PROP. LOT LINE (TYP.)
EX. LOT LINE
(TO REMAIN)
(TYP.)
PROP. LOT LINE (TYP.)
PROP. PROJECT BOUNDARY
& EX. LOT LINE
PROP. PROJECT
BOUNDARY &
EX. LOT LINE
PROP. PROJECT
BOUNDARY &
EX. LOT LINE
PROP. LOT
LINE (TYP.)
EX. LOT LINE
(TO BE
REMOVED)
(TYP.)
EX. MULTI-USE
EASEMENT (TYP.)
(TO BE REMOVED)
EX. MULTI-USE
EASEMENT (TYP.)
(TO BE REMOVED)
EX. MULTI-USE
EASEMENT (TYP.)
(TO BE REMOVED)
EX. MULTI-USE
EASEMENT (TYP.)
(TO BE REMOVED)
PROP. LOT LINE (TYP.)
PROP. R/W (TYP.)
EX. R/W (TYP.)
EX. R/W (TYP.)
EX. R/W (TYP.)
EX. PROJECT BOUNDARY
EX. R/W (TYP.)
EX. LOT LINE (TYP.)
EX. LOT LINE
(TYP.)
EX. C/L
EX. R/W
EX. R/W
EX. CURB & GUTTER
PROP. R/W (TYP.)
EX. LOT LINE
(TO BE
REMOVED)
(TYP.)
EX. LOT LINE
(TO REMAIN) (TYP.)
EX. LOT LINE
(TO BE
REMOVED)
(TYP.)
EX. LOT LINE
(TO BE REMOVED) (TYP.)
EX. LOT LINE
(TO BE REMOVED) (TYP.)
EX. LOT LINE
(TO BE REMOVED) (TYP.)
229'118'56'130'179'136'130'200'
183'129'190'116'212'100'225'
248'
240'
217'100'217'
203'88'209'68'18
7
'
53'199'2
2
0
'
105'197'202'98'201'208'105'209'100'202'100'210'100'208'100'182'221'
134'100'
228'54'93'191'97'99'111'68'102'200'111'100'222'100'219'101'202'100'210'
229'
175'110'214'86'200'108'175'78'200'101'101'109'
177'104'254'104'104'R = 38.5'
R = 38.5'39'3
8
'110'37'
3 3'33'157'101'100'100'100'101'101'4
1
'41 '95'161'176'100'100'101'98'101'102'102'100'102'105'100'112'237'
100'100'
117'
101'
105'
129'100'101 '100'105'212'
=43°20'22" R=32 9 .5 0' 2 4 9 .2 4 'N
4
6
°
2
0
'
0
4
"
W
2
2
0
.
2
4
'
N
4
6
°
2
0
'
0
4
"
W
1
8
6
.
9
4
'=64°11'25" R=329.50' 369.15'N 01°20'04" W
30.37'
∆=21°37'35"
R=144.50' 54.54'
EX. LOT LINE
(TO BE REMOVED) (TYP.)
EX. LOT LINE
(TO REMAIN) (TYP.)
EX. FIRE
HYDRANT (TYP.)
A.C. PAVEMENT
OVER A.B.
2%2%
1'X1' COLORED
CONCRETE EDGE
SECTION A-A
SEATTLE SLEW WAY & AFLEET ALEX WAY
(PRIVATE ROAD)
N.T.S.
R/W
EX.
R/W
EX.
14.5'14.5'
29' (NO PARKING)8'8'
MIN.
DRAINAGE, PARKING &
LANDSCAPE
MIN.
15'
MULTI-USE EASEMENT
A.C. PAVEMENT
OVER A.B.
2%2%
1'X1' COLORED
CONCRETE EDGE
SECTION B-B
DONALI STREET & BOLD RULER WAY
(PRIVATE ROAD)
N.T.S.
R/W
EX.
R/W
EX.
14.5'14.5'
29' (NO PARKING)10'10'
P.U.E P.U.E
DRAINAGE &
LANDSCAPE
TENTATI
ASSESSOR'S PARCEL NUM
SOURCE OF TOPOGRAP
ADDRESS:
TELEPHONE:
PUBLIC UTILITY PURVEYO
IM
S
F
C
S
C
U
EXISTING ZONING:
PROPOSED ZONING:
EXISTING GENERAL PLAN
PROPOSED GENERAL PLA
L
LAND USE DESCRIPTION:
ZONE "X": AREA OF MINI
FEMA FLOOD ZONE DES
APPLICANT /
ADDRESS:
CONTACT:
15
CA
AL
EXHIBIT PREPARER:
ADDRESS:
MS
34
RA
CONTACT:PA
NO. DATE
SCHOOL DISTRICT:CO
NOTES:1.
IN THE CITY O
LEGAL DESCRIPTION:
DE
ELECTRIC
GAS
TELEPHONE
WATER
CABLE
SEWER
USA
BEING A SUBDIVISION O
LAND OWNER:
THIS MAP I
CA
EXISTING GROSS & PRO
PROPOSED SINGLE FAM
PROPOSED OPEN SPAC
780-120-001 THRU 780-12
PROPOSED PRIVATE STR
RANGE 7 EAST, SAN BER
MSA
> PLANNING > CIV
34200 Bob H
760.320.9811
AS SHOWN ON RIVERSID
COMMUNITY PANEL MA
EXISTING IRRIGATION
EXISTING GAS
EXISTING EASEMENT
EXISTING ELECTRIC
EXISTING IRRIGATION DRAIN LINE
EXISTING CABLE
EXISTING CONTOURS
EXISTING SPOT ELEVATIONS
LEGEND
EXISTING EASEMENT DELTA
EXISTING LOT LINE
EXISTING TELEPHONE
EXISTING EDGE OF PAVEMENT
EXISTING OVERHEAD TELEPHONE
NUMBER
PROPOSED
RIGHT OF WAY
TYPICAL
NO.
PROP.
R/W
TYP.
P.U.E. PUBLIC UTILITY EASEMENT
SF SQUARE FEET
RADIUSR
STANDARDSTD.
P/L PROPERTY LINE
N.T.S. NOT TO SCALE
R-L LOW DENSITY (RESIDENTIAL)
UG UNDERGROUND
OVERHEADO/H
OPEN SPACE / PARKSOS/PP
PAGEPG.
c/
(AFLEET ALEX WAY, BOL
L
V
MINIMUM SINGLE FAMIL
LIQUEFACTION:HIGH
EXISTING SEWER
EXISTING RIGHT OF WAY
PROPOSED AND EXISTING CENTER LINE
PROPOSED CURB
EXISTING SEWER FORCE MAIN
EXISTING WATER
PROPOSED EASEMENT
PROPOSED TENTATIVE TRACT MAP BOUNDARY
EXISTING LOT LINE (TO REMAIN)
PROPOSED LOT LINE
PROPOSED RIGHT OF WAY
EXISTING LOT LINE (TO BE REMOVED)
EAST
NORTH
SOUTH
WEST
CENTERLINE
EASEMENT
EXISTING
(E)
(N)
(S)
(W)
C/L
ESMT.
EX.
ABBREVIATIONS
ACREAGEAC
CURB AND GUTTERC&G
ASSESSORS PARCEL NUMBERAPN
E/P EDGE OF PAVEMENT
A.C. ASPHALT CONCRETE
MIN. MINIMUM
MAX. MAXIMUM
BOUNDARYBNDRY
M.B. MAP BOOK
AVERAGE SINGLE FAMIL
2
3
Mr. Jon Myhre
CADO La Quinta Estates, LLC
November 2, 2021
14041‐02 VMT Screening and Access Assessment
Small Projects with low trip generation per existing CEQA exemptions or resulting in a 3,000 metric tons
of Carbon Dioxide Equivalent per year screening level threshold. Specific examples include Single Family
Housing projects less than or equal to 140 Dwelling Units and Multi Family (low rise) Housing projects less
than or equal to 200 Dwelling Units.
Affordable Housing with a high percentage of affordable units as determined by the Planning and
Engineering departments,
Low VMT Area Screening within an area of development under threshold based upon RIVTAM modeling,
and
Redevelopment Projects which replace an existing VMT‐generating land use and do not result in a net
overall increase in VMT.
PROJECT RESIDENTIAL SCREENING
The Project has been reviewed for VMT screening based upon its size as a small project, and no further
VMT analysis is needed. Single Family Housing projects less than or equal to 140 Dwelling Units may be
presumed to have a less than significant impact absent substantial evidence to the contrary.
PROJECT TRIP GENERATION
Determining trip generation for a specific project is based upon estimates of the amount of traffic that
is expected to be both attracted to and produced by the specific on‐site land use. For this assessment,
trip generation rates are based upon data collected by the Institute of Transportation Engineers (ITE) in
the Trip Generation Manual, 10th Edition, 2017, and the Trip Generation Manual, 10th Edition
Supplement, February 2020.
The ITE Land Use (LU) Code 210 and land use description has been utilized to identify the appropriate
ITE description of the proposed Project: Trip generation rates used to estimate approved and proposed
traffic for the site are shown in Table 1 and trip generation estimates for the currently approved 20
residences are shown in Table 2.
TABLE 1: TRIP GENERATION RATES1
Land Use
ITE LU
Code Quantity2
AM Peak Hour PM Peak Hour
Daily In Out Total In Out Total
Single Family Detached 210 20 DU 0.19 0.55 0.74 0.62 0.37 0.99 9.44
1 Trip Generation Source: Institute of Transportation Engineers (ITE), Trip Generation Manual, 10th Edition (2017).
2 DU = Dwelling Units
Mr. Jon Myhre
CADO La Quinta Estates, LLC
November 2, 2021
14041‐02 VMT Screening and Access Assessment
Based on these trip rates, the currently approved 20 residences are anticipated to generate a total of
approximately 189 trip‐ends per day with 15 vehicles per hour during the AM peak hour and 19 vehicles
per hour during the PM peak hour.
TABLE 2: APPROVED SITE RESIDENTIAL TRIP GENERATION
Land Use
ITE LU
Code Quantity1
AM Peak Hour PM Peak Hour
Daily In Out Total In Out Total
Single Family Detached 220 20 DU 4 11 15 12 7 19 189
1 DU = Dwelling Units
As shown in Table 3, the proposed Project is anticipated to generate a total of approximately 349 trip‐
ends per day with 27 vehicles per hour during the AM peak hour and 36 vehicles per hour during the PM
peak hour.
TABLE 3: PROPOSED PROJECT TRIP GENERATION, AND NET DIFFERENCES
Land Use
ITE LU
Code Quantity1
AM Peak Hour PM Peak Hour
Daily In Out Total In Out Total
Single Family Detached (Proposed) 220 37 DU 7 20 27 23 14 37 349
Net Difference 2 17 DU 3 9 12 11 7 18 160
1 DU = Dwelling Units
2 Difference between approved residential for the site and the proposed Project
The proposed Project is anticipated to generate approximately 160 more trip‐ends per day when
compared to approved residential uses on‐site, with 12 more vehicles per hour during the AM peak hour
and 17 more vehicles per hour during the PM peak hour.
SITE ACCESS AND CIRCULATION CONTEXT
The proposed Project will have three access connections to surrounding roadways. At the southwest
corner of the site, Seattle Slew Way connects the Project to Merv Griffin Way and outward to Madison
Street. Merv Griffin Way provides as a gated access point, serving visitors as well as residents.
Northbound right turn and southbound left turn lanes accommodate inbound turning movements at the
Madison Street/Merv Griffin Way intersection.
At the northwest corner of the site, Donali Street connects the Project to Alysheba Drive and outward
to Avenue 54. This is a gated resident‐only access point, with a westbound left turn lane for inbound
traffic at the Alysheba Drive/Avenue 54 intersection.
At the northeast corner of the site, Bold Ruler Way connects the Project to Merv Griffin Way and outward
to Avenue 54. This is also a gated resident‐only access point, with a westbound left turn lane for inbound
traffic at the Merv Griffin Way/Avenue 54 intersection.
Mr. Jon Myhre
CADO La Quinta Estates, LLC
November 2, 2021
14041‐02 VMT Screening and Access Assessment
Exhibit 2 illustrates the study area intersections located near the proposed Project and identifies the
number of through traffic lanes for existing roadways and intersection traffic controls.
GENERAL PLAN CIRCULATION ELEMENT
Exhibit 3 shows the City of La Quinta Circulation Plan and classifications of adjacent roadways.
Madison Street – Madison Street is a north‐south oriented roadway located west of the Project and
classified as a 4‐lane divided primary arterial in the City of La Quinta Circulation Plan.
Avenue 54 – Avenue 54 is an east‐west oriented roadway located north of the Project and classified as
a 4‐lane divided primary arterial in the City of La Quinta Circulation Plan.
TRIP DISTRIBUTION AND ASSIGNMENT
The trip distribution pattern is heavily influenced by the geographical location of the site, the location of
surrounding uses, and the proximity to the regional freeway system. Exhibit 4 displays the estimated Project
traffic distribution pattern.
Based on the identified Project traffic generation and estimated trip distribution pattern, Project peak hour
intersection turning movement volumes are shown on Exhibits 5 and 6 for morning and evening peak hours,
respectively.
At the Madison Street/Merv Griffin Way (#3) intersection, the approved site residential (20 Dus) adds 1
vehicle during the morning peak hour and 3 vehicles during the evening peak hour to the northbound
right turn lane. The proposed Project (37 Dus) contributes an additional 1 vehicle during the morning
peak hour and 3 vehicles during the evening peak hour to the northbound right turn lane.
At the Madison Street/Merv Griffin Way intersection (#3), the approved site residential (20 Dus) adds 1
vehicle during the morning peak hour and 2 vehicles during the evening peak hour to the southbound
left turn lane. The proposed Project (37 Dus) contributes an 2 additional vehicles during the evening
peak hour to the southbound left turn lane.
At the Alysheba Drive/Avenue 54 (#1) and Merv Griffin Way/Avenue 54 (#2) intersections, the volumes
added by the proposed Project (in addition to the approved site residential) at individual turning
movements are 2 vehicles or less on all inbound and outbound turns.
FINDINGS/CONCLUSIONS
Tentative Tract Map 38083 is anticipated to generate approximately 160 more trip‐ends per day when
compared to approved residential uses on‐site, with 12 more vehicles per hour during the AM peak hour
and 18 more vehicles per hour during the PM peak hour.
7
8
9
10
Mr. Jon Myhre
CADO La Quinta Estates, LLC
November 2, 2021
14041‐02 VMT Screening and Access Assessment
The Project has been reviewed for VMT screening based upon its size as a small project, and no further
VMT analysis is needed. Single Family Housing projects less than or equal to 140 Dwelling Units may be
presumed to have a less than significant impact absent substantial evidence to the contrary.
The proposed Project will have three access connections to surrounding roadways. Each access point
has existing lane geometrics which have been planned to serve buildout of the Griffin Ranch Specific Plan
area. Volumes added by the proposed Project (in addition to the approved site residential) at individual
turning movements have been reviewed, and the peak hour increases are nominal.
If you have any questions, please contact John Kain at (949) 375‐2435 or Marlie Whiteman (714) 585‐
0574.
Respectfully submitted,
URBAN CROSSROADS, INC.
John Kain, AICP Marlie Whiteman, PE
Principal Senior Associate