CC Resolution 2004-127RESOLUTION 2004-127
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LA QUINTA,
CALIFORNIA APPROVING A NEGATIVE DECLARATION OF
ENVIRONMENTAL IMPACT PREPARED FOR GENERAL PLAN
AMENDMENT 2004-102
CASE NO.: ENVIRONMENTAL ASSESSMENT 2004-521
GENERAL PLAN AMENDMENT - HOUSING ELEMENT
APPLICANT: CITY OF LA QUINTA
WHEREAS, City Council of the City of La Quinta did on the 19th day of
October, 2004 hold a duly noticed Public Hearing, and closed said public participation
portion of the Hearing, and continued consideration the proposed Environmental
Assessment for the General Plan Amendment Housing Element Update to a public
meeting on the 2"d day of November, 2004; and
WHEREAS, the Planning Commission of the City of La Quinta did on the
28�' day of September, 2004, and the 12t' day of October, 2004 hold a duly noticed
Public Hearing and recommended certification by adoption of Resolution 2004-079;
and
WHEREAS, the City Council of the City of La Quinta, California previously
adopted Resolution 2002-44 as a comprehensive update of the General Plan for the
City pursuant to Sections 65350 et seq. of the California Planning and Zoning Law;
and
WHEREAS, Environmental Impact Report (SCH #20000991023) has been
prepared, adopted under City Council Resolution 2002-43, and certified for the General
Plan as prescribed by the California Environmental Quality Act and identifies various
mitigation measures to a level of insignificance and identifies certain impacts which
cannot be so mitigated with a Statement of Overriding Considerations; and
WHEREAS, the City has prepared the Initial Study and Negative
Declaration in compliance with California Environmental Quality Act (CEQA) and the
State CEQA Guidelines, California Code of Regulations, Title 14, Section 15000 et.
seq., (CEQA Guidelines); and
WHEREAS, the Interim Community Development Director has determined
that said Amendment will not have a significant adverse impact on the environment
due to the mitigations measures required in the General Plan EIR and incorporated
herein by this reference and that a Negative Declaration of environmental impact
should be filed; and
Resolution No. 2004-127
Environmental Assessment 2004-521
General Plan Housing Element
Adopted: November 2, 2004
Page 2
WHEREAS, the Planning Commission of the City of La Quinta does
recommend to the City Council certification of the Environmental Assessment; and
WHEREAS, the City mailed a Notice of Intent to adopt the Mitigated
Negative Declaration in compliance with Pubic Resources Code Section 21092 on the
141h day of September, 2004 to the Riverside County Clerk; and
WHEREAS, the City published a Public Hearing Notice to adopt the
Mitigated Negative Declaration and associated Initial Study in the Desert Sun
newspaper on September 29, 2004, 'such notice was also mailed to concerned
agencies, and all public entities entitled to such notice; and
WHEREAS, upon hearing and considering all testimony and arguments, if
any, of all interested persons desiring to be heard, said City Council did make the
following.findings to justify certification of said Environmental Assessment:
1. T hat the Negative Declaration has been prepared and. processed in compliance
• with the State CEQA Guidelines and the City's implementation procedures. The
P18nning Commission has independently reviewed and considered the
information contained in the Negative Declaration, and finds that it adequately
describes and addresses the environmental effects of the Project, and based
upon the Initial Study, the comments received thereon, and the entire record of
proceeding for this Project, and finds that there are no significant environmental
effects resulting from this project.
' The P,-oiect will not be detrimenital to the health, safety, or general welfare of
the, either indirectly, or directly, in that no significant impacts were
identified by Environmental Assessment 2004-521.
-The Project will not have the potential to degrade the quality of the
environment, substantially reduce the habitat of a fish or wildlife population to
drop below self sustaining levels, threaten to eliminate a plant or animal
-community, reduce the number, or restrict the range of, rare or endangered
plants or animals or eliminate important examples of the major periods of
California history, or prehistory.
4. There is no evidence before the City that the Project will have the potential for
an adverse effect on wildlife resources or the habitat on which the wildlife
depends.
Resolution No. 2004-127
Environmental Assessment 2004-521
r General Plan Housing Element w`
k Adopted: November 2, 2004 Y'
Page 3
5. The Project does not have the potential to achieve short-term environmental
goals, to the disadvantage of long-term environmental goals, as no significant
effects on environmental factors have been identified by the Environmental
Assessment.
6 The Project will not result in impacts which are individually limited or
cumulatively considerable when considering planned or proposed development in
the immediate vicinity, as development patterns in the area will not be
significantly affected by the Project.
7. The Project will not have the environmental effects that will adversely affect the
human population, either directly or indirectly, as no significant impacts have
been identified which would affect human health, risk potential or public
services.
8. The City Council has fully considered the proposed Negative Declaration and the
comments, if any, received thereon.
9. The Negative Declaration reflects the independent judgment. and analysis of the
City Council.
10. The location of the documents which constitute the record of proceedings upon
which the City Council decision is based upon, are located in the La Quinta City.
Hall, Community Development Department, 78-495 Calle Tampico, La Quinta,
California, 92253.
11. Based upon the Initial Study .and the entire record of proceedings, the Project
has no potential for adverse effects on wildlife as that terra is defined in Fish
and Game Code § 711.2.
13. The City Council has on the basis of substantial evidence, rebutted the
presumption of adverse effect set forth in 14 California Code of Regulations
753.5(d).
NOW THEREFORE, BE IT RESOLVED by the City Council of the City of
La Quinta, California, as follows:
1: That the above recitations are true and correct, and constitute the findings of
the City Council for this Environmental Assessment.
Resolution No. 2004-127
Environmental Assessment 2004-521
General Plan Housing Element
Adopted: November 2, 2004
Page 4
2. That it does hereby approve a Negative Declaration of environmental impact for
Environmental Assessment 2004-521 for the reasons set forth in this
Resolution and as stated in the Environmental Assessment Checklist and
Addendum, on file in the Community Development Department and attached
hereto.
PASSED, APPROVED and ADOPTED at a regular meeting of the La Quinta
City Council held on this 2"d day of November, 2004, by the following vote, to wit:
AYES: Council Members Henderson, Osborne, Perkins, Sniff, Mayor Adolph
NOES: None
ABSENT: None
ABSTAIN: None
1AW ajo'k
DON AD PH, ayor
City of La Quinta California
ATTEST:
JD . GRFEK, CMC, CilFCTerk
City of La Qunta, California
(City Seal)
APPROVED AS TO FORM:
NAY AT#-IERINE JENSON, Lgity Attorney
City of La Quinta, California
P.O. Box 1504
78-49.5 CALLS TAMPICO (760) 7774000
LA QUINTA, CALIF0RNIA 92253 FAX (760) 777-7.10.1
NEGATIVE DECLARATION
Pursuant to the Procedures of the City of La Quints for the implementation of the California Environmental CXWity
Act, the City has completed an Initial Study for the project described below:
Project Title: City of La Quints Housing Element Update
Applicant: City of. La Quinta, Planning Department
Project Location/: Citywide
Address
Project Title/Description:
The City of La Quints as proposing an update of the Housing Element. The General Plan
Housing Element details the Caty's strategy for enhwx*V and preserving the
comet inlays character, sets forth strategies for expanding housing opportunities for the
�.., City's various econondo segments, and provides the primary policy guidance for local
decision -making related to housing. The Housing Element provides the implementation
strategies for effectively addressing the housing needs of La Quints residents through
the 1998-2005 planning period.
The City of La Quinta is one of nine cities located an the Coachella Valley subregion of
Riverside County. During the 1990's, the population of La Quanta grew by 156.0 percent,
making it the fastest growing city an the Coachella Valley. The 2003 population
estimates 32,130 indicate a population of 28,715, which is an increase of 17,500 persons
since 1990. The population further increased to 30,452 by January 2003. The Caty's
estimated population represents 10.5% of the incorporated Valley's total population and
approximately 2% of the County's total population. While the seasonal or part-time
- resident is not Included an the population estimates complied by the Census Bureau, this
population is a significant part of La Quanta's year-round population, with 11,278 persons
occupying 4,027 dwelling units for some part of the year, but having a primary residence .
elsewhere, as estimated by the Department of Finance in 2002. The City is a largely
tourist -oriented economy. - Like the surrounding Cities of Indio and Indian Wells; La
Quinta contains a mix of low -density residential, resort residential, and open space uses.
The City finds: That the proposed project cannot; or will not, have a significant effect on the
environment. No mitigation measures are required for the proposed project.
Signature Date v
red Baker
This determination Is not final until adopted by the decision -making body or administrative official, and a Notice
of Determination as filed.
INUM STUDY
FOR. -
CITY OF LA QUINTA
HOUSING ELEMENT
CITY OF LA QUINTA
City of La Quinta Contact: Fred Baker
78-495 Calle Tampico
La Quinta, CA 92253
909.674.3124
ppared by:
1580 Metro Drive THE PLANNING
Costa Mesa, CA 92626 CENTER
Phone: 714.966.9220
Contact. Colin Drukker
AUGUST 24, 2004
Table of Contents
Section Page
1. INTRODUCTION............................................................................................................1
1.1
PROJECT LOCATION.............................................................................................................1
1.2
ENVIRONMENTAL SETTING ....................
1.3
PROJECT DESCRIPTION.....................................................................................:................
2
1.4
CITY ACTION REQUESTED...................................................................................................2
2. ENVIRONMENTAL CHECKLIST ........................
..........:................................. see .... ........
.5
2.1
BACKGROUND.......................................................................................................................5
2.2
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED....................................................7
2.3
DETERMINATION: (To Be Completed By The Lead Agency)..............................................7
2.4
EVALUATION OF ENVIRONMENTAL IMPACTS....................................................................8
2.5
REFERENCES......................................................................................................................16
3. ENVIRONMENTAL ANALYSIS., ........... ............... w ...... *.-a .... eew*117
3.1
AESTHETICS ............................. :........................................................................................... 17
3.2
AGRICULTURE RESOURCES..............................................................................................18
3.3
AIR QUALITY ...........................
3.4
BIOLOGICAL RESOURCES.................................................................................................24
3.5
CULTURAL RESOURCES.....................................................................................................26
3.6
GEOLOGY AND SOILS.........................................................................................................28
3.7
HAZARDS AND HAZARDOUS MATERIALS ......................................
3.8
HYDROLOGY AND WATER QUALITY..................................................................................32
3.9
LAND USE AND PLANNING.................................................................................................35
3.10
MINERAL RESOURCES.......................................................................................................35
3.11
NOISE ...................................... .............................................................................................36
3.12
POPULATION AND HOUSING.............................................................................................39
3.13
PUBLIC SERVICES.......................................................................
3.14
RECREATION.......................................................................................................................41
3.15
TRANSPORTATION/TRAFFIC..............................................................................................41
3.16
UTILITIES AND SERVICE SYSTEMS....................................................................................43
3.17
MANDATORY FINDINGS OF SIGNIFICANCE......................................................................45
City of La Quinta Housing Element • August 2004 ' The Planning Center • Page i
PAC4-02 (WordPerfeect)U?mrrwmenlaAlS NU.Ar
Table of Contents
List of Figures
Figure Page
Figure1 Regional Location Map...............................................................................................................3
List of Tables
Table Pa e
TABLE 1 AMBIENT AIR QUALITY STANDARDS.........................................................................................21
TABLE 2 NOISE LEVELS GENERATED BY TYPICAL CONSTRUCTION EQUIPMENT..............................38
The Planning Center • Page ii City of La Quinta Housing Element • August 2004
P:1CIy-02(W,.rdPerfe,-t)�F'ntir,,timenta111S NU.dx-
1. Introduction
This Initial Study has been prepared to evaluate the potential environmental effects associated with the
adoption of the City of La Quinta 2002 Housing Element update. This analysis has been conducted in
compliance with the California Environmental Quality Act (CEQA) and Guidelines as amended and the
City of La Quinta CEQA Environmental Rules.
1.1 PROJECT LOCATION
The Regional Location Map (Figure 1) shows the location of the City of La Quinta within the context. of
the Riverside County region. La Quinta is located in Riverside County and is located approximately 6
miles southeast of Palm Desert, 114 miles east of Los Angeles, and 82 miles northeast of San Diego.
The Santa Rosa Mountains to the west, the Lake Cahuilla to the south, the Mecca Hills to the east, and
the Coachella Valley Preserve to the north bound the community. Access to - La Quinta is possible
through two highway corridors: Interstate 10 and State Highway 111.
1.2 ENVIRONMENTAL SETTING
1.2.1 Existing Land Use
The estimates of the 2003 population of the City of La Quinta indicate a population of 32,138; which is an
increase of 20,924 persons since 1990. The City's estimated population represents approximately 2% of
the total population of Riverside County.
The Department of Finance estimated that at the start of 2002, 14,938 homes existed in La Quinta, with a
projected average household size of 2.84 persons per household. According to the 2000 U.S. Census,
the average value of existing housing units in La Quinta was $170,100, the average asking price of a
typical new home was $239,885, and the median household income was $54,552. For rental stock, the
median contract rent of all rental units in the City was $691 per month, with over 62% of unit monthly
rents over $750 a month. The Census also shows that single-family detached units comprise 75.1
percent of housing units, while multi -family units comprise only 5.7 percent of total housing units. As of
2000, more housing units in La Quinta were owner -occupied (81.5%) than renter -occupied.
According to the January 1, 2002 City of La Quinta Residential Status Report and the 2000 U.S. Census,
a majority of the housing stock in the City was built in the last decade, from 1991 - 2002. Approximately
55% of the housing stock has been built since 1990, and about 41 % of the current stock was constructed
between 1970 and 1990. Only 4% was constructed prior to 1970.
As of November 2002, a total of 3,775 acres of vacant land are available for development for a potential
of 13,195 units, assumes redevelopment of 90% of agricultural land within the City to low -density
residential and development to occur at 75% of the highest maximum permitted densities. La Quinta is
required, per California Housing Element law, to meet its "fair share" of existing and future housing
needs for all income groups. It has been determined that La Quinta's "fair share" is 913 additional units
for the planning period of 1998-2005.
City of La Quinta Howing Element • Augurt 2004 The Planning Center • Page 1
PAC4-02 (W.rdPerfert)%ENvirmmeNt AlS_ND.dar
1. Introduction
1.2.2 Surrounding Land Use
The City is located in a mature area with a mix of residential and commercial land uses. The surrounding
Cities of Indio and Indian Wells also contain a mix of low -density residential, resort residential and open
space uses.
1.3 PROJECT DESCRIPTION
1.3.1 Housing Element Description
The Housing Element is one of the seven General Plan Elements mandated by the State of California, as
articulated in Sections 65580 to 65589.8 of the Government Code. State Law requires that the Housing
Element consist of "an identification and analysis of existing and projected housing needs and a
statement of goals, policies, quantified objectives, and scheduled programs for the preservation,
improvement and development of housing." The residential character of the City is, to a large extent,
determined by the variety of its housing stock, its location and physical condition. The Housing Element
is, therefore, an official municipal response to the need to provide housing for all economic segments of
the population.
The City of La Quinta's General Plan Housing Element details the City's strategy for enhancing and
preserving the community's character, sets forth strategies for expanding housing opportunities for the
City's various economics segments, and provides the primary policy guidance for local decision -making
related to housing. The Housing Element provides the implementation strategies for effectively
addressing the housing needs of La Quints residents through the 1998-2005 planning period.
The Housing Element provides in-depth analysis of the City's population, economic, household, and
household stock characteristics as required by State Law. The Element also provides a comprehensive
evaluation of programs and regulations related to priority goals, objectives, and program actions that
directly address the needs of La Quinta residents. The Housing Element identifies a Regional Housing
Needs Assessment of 913 housing units in the City. However, vacant and underutilized parcels
throughout the City have a development potential of 13,195 dwelling units. The impacts of
implementation of the Housing Element are based upon the development (new construction) of 9,204
dwelling units, as listed in Table H-49, Quantified Objectives Summary of the Housing Element.
The Housing Element is only one facet of the City's overall planning program. The California
Government Code requires that General Plans contain an integrated, consistent set of goals and
policies. The Housing Element is, therefore, affected by development policies contained in other
elements of the General Plan.
1.3.2 Project Phasing
The Housing Element addresses the seven and one-half year timeframe of January 1998-July 2005.
1.4 CITY ACTION REQUESTED
The proposed action is the adoption of an amendment to the Housing Element of the City's General Plan
as well as the adoption of the Negative Declaration for the Housing Element Update.
The Planning Center • Page 2 City of La Quinta Housing Element • August 2004
PAClq-42(1[WirdPcrfrct)lErtvirtnmattaAIS NU.dw
1. Introduction
Regional Location Map
CITY OF
LA QUNITA
City of La Quinta Horning Element • August 2004 The Planning Center • Page 3
P:1Clq-()2 (WwdPrfat)V."irwmnitaAIS ND d,.-
1. Introduction
This page intentionally left blank.
The Planning Center • Page 4 City of La Quinta Housing Element* August 2004
PAC1q-02 (W,,rdPafrtt)kEnvirYnrmentaAIS NU.,�kR
2. Environmental Checklist
2.1 BACKGROUND
1. Project Title: City of La Quinta Housing Element
2. Lead Agency Name and Address:
City of La Quinta
78-495 Calle Tampico
La Quinta, CA 92253
3. Contact Person and Phone Number:
Fred Baker
909.674.3124
4. Project Location: City of La Quinta (citywide) ,
S. Project Sponsor's Name and Address:
City of La Quinta
78-495 Calle Tampico
La Quinta, CA 92530
6. General Plan Designation: Various.
7. Zoning: Various.
S. Description of Project (Describe the whole action involved, including but not limited to, later phases
of the project, and any secondary, support, or off -site features necessary for its implementation.
Attach additional sheets if necessary):
The project consists of an update to the Housing Element of the City of La Quinta General Plan
City of La Quinta Horsing Element *A ugust 2004 The Planning Center • Page S
PAC4-02 (WardP.rfa7)1F.uvirmmrfftaAIS NU da-
2. Environmental Checklist
(see discussion under Section 1.3, above).
9. Surrounding Land Uses and Setting (Briefly describe the project's surroundings):
See discussion under Section 1.3.
10. Other Public Agencies Whose Approval is Required (e.g., permits, financing approval, or
participation agreement):
No other public agencies have approval authority over the project. However, the California
Department of Housing and Community Development has authority of review and comment on the
Element.
The Planning Center # Page 6 City of La Quinta Housing Element • August 2004
P:%Clq-02 (W,,n•dPerfa-i)1F.mirrmmentaAIS NU.r6c
2. Environmental Checklist
2.2 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED
The environmental factors checked below would be potentially affected by this project, involving at least
one impact that is a "Potentially Significant Impact," as indicated by the checklist on the following pages.
❑ Aesthetics ❑ Agricultural Resources ❑ Air Ouality
❑ Biological Resources ❑ Cultural Resources ❑ Geology / Soils
❑ Hazards & Hazardous Materials ❑ Hydrology / Water Duality ❑ Land Use / Planning
❑ Mineral Resources ❑ Noise ❑ Population / Housing
.❑ Public Services ❑ Recreation ❑ Transportation / Traffic
❑ LUdes / Service Systems ❑ Mandatory Findings of Significance
2.3 DETERMINATION: (To Be Completed By The Lead Agency)
On the basis of this initial evaluation:
® I find that the proposed project COULD NOT have a significant effect on the environment, and a
NEGATIVE DECLARATION will be prepared.
F] I find that although the proposed project could have a significant effect on the environment, there
will not be a significant effect in this case because .revisions in the project have been made by or agreed
to by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared. C070
F] I find that the proposed project MAY have a significant effect on the environment, and an
ENVIRONMENTAL IMPACT REPORT is required.
F1I find that the proposed project MAY have a "potentially significant impact" or "potentially
significant unless mitigated" impact on the environment, but at least one effect 1) has been adequately
analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by
mitigation measures based on the earlier analysis as described on attached sheets. An
ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be
addressed.
F] I find that although the proposed project could have a significant effect on the environment,
because all potentially significant effects (a) have been analyzed adequately in an earlier EIR or
NEGATIVE DECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated
pursuant to that earlier EIR or NEGATIVE DECLARATION, including revisions or mitigation, measures that
are imposed upon the proposed project, nothing further is required.
City of La Quinta Housing Element • August 2004 The Planning Center • Page 7
PACk-02 (W.,rdPrr rt)U:mir"wntaAlS NU.dx-
2. Environmental Checklist
2.4 EVALUATION OF ENVIRONMENTAL IMPACTS
A brief explanation is required for all answers except "No Impact" answers that are adequately supported
by the information sources a lead agency cites in the parentheses following each question. A "No
Impact" answer is adequately supported if the referenced information sources show that the impact
simply does not apply to projects like the one involved (e.g., the project falls outside a fault rupture
zone). A "No Impact" answer should be explained where it is based on project -specific factors, as well as
general standards (e.g., the project would not expose sensitive receptors to pollutants, based on a
project -specific screening analysis).
All answers must take account of the whole action involved, including off -site as well as on -site,
cumulative as well as project -level, indirect as well as direct, and construction as well as operational
impacts.
Once the lead agency has determined that a particular physical impact may occur, then the checklist
answers must indicate whether the impact is potentially significant, less than significant with mitigation,
or less than significant. "Potentially Significant Impact" is appropriate if there is substantial evidence that
an effect may be significant. If there are one or more "Potentially Significant Impact" entries when the
determination is made, and EIR is required.
"Negative Declaration: Less Than Significant With Mitigation Incorporated" applies where the
incorporation of mitigation measures has reduced an effect from "Potentially Significant Impact" to a
"Less Than Significant Impact". The lead agency must describe the mitigation measures, and briefly
explain how they reduce the effect to a less than significant level (mitigation measures from Section XVI1,
"Earlier Analyses", may be cross-referenced).
Earlier analyses may be used where, pursuant to the tiering, program EIR, or other CEQA process, an
effect has been adequately analyzed in an earlier EIR or negative declaration. Section 15063(c)(3)(D).
Earlier analyses are discussed in Section XVII at the end of the checklist. In this case, a brief discussion
should identify the following:
Earlier Analysis Used. Identify and state where they are available for review.
Impacts Adequately Addressed. Identify which effects from the above checklist were within the
scope of and adequately analyzed in an earlier document pursuant to applicable legal standards,
and state whether such effects were addressed by mitigation measures based on the earlier
analysis.
Mitigation Measures. For effects that are "Less than Significant with Mitigation Measures
Incorporated", describe the mitigation measures that were incorporated or refined from the earlier
document and the extent to which they address site -specific conditions for the project.
Lead agencies are encouraged to incorporate into the checklist references to information sources for
potential impacts (e.g., general plans, zoning ordinances). Reference to a previously prepared or
outside document should, where appropriate, include a reference to the page or pages where the
statement is substantiated. A source list should be attached, and other sources used or individuals
contacted should be cited in the discussion.
Supporting Information Sources: A source list should be attached, and other sources used or
individuals contacted should be cited in the discussion.
The Planning Center • Page 8 City of La Quinta Housing Element # August 2004
P:1C14-02(W,.rdPerfe,1)IEnvir,.rtmrnt4AIS NV.d«
2. Environmental Checklist
This is only a suggested form, and lead agencies are free to use different formats; however, lead
agencies should normally address the questions from this checklist that are relevant to a project's
environmental effects in whatever format is selected.
The explanation of each issue should identify:
a) the significance criteria or threshold, if any used to evaluate each question; and
b) the mitigation measure identified, if any, to reduce the impact to less than significant.
City of La Quinta Housing Element* August 2004
PAC/1-02 (WordPsrfal)%Exvimmjvl4NS ND.d«-
The Planning Center • Page 9
2. Environmental Checklist
Less Than
Significant
Potentially
With
Less Than
Significant
Mitigation
Significant
No
Issues
Impact
Incorporated
Impact
Impact
q :5S:
i• t.:_ r: � _
a Have a substantial adverse effect on a scenic vista?
L
Z
X
b) Substantially damage scenic resources, including, but not
limited to, trees, rock outcroppings, and historic buildings
X
within a state scenic highway?
c) Substantially degrade the existing visual character or quality
of the site and its surroundings?
X
d) Create a new source of substantial light or glare
which would adversely affect day or nighttime views
X
in the area?
77 ,1�
a) Convert Prime Farmland, Unigpe Farmland, or Farmland of
Statewide Importance (Farmland), as shown on the maps
prepared pursuant to the Farmland Mapping and Monitoring
Program of the Califomia Resources Agency, to non-
agricultural use?
b) Conflict with existing zoning for agricultural use, or a
Williamson Act contract?
c) Involve other changes in the existing environment which,
due to their location or nature, could result in conversion of
Farmland, to non-agricultural use?
-3 sir-�r.•� k ''� , .'f ir y ,� <'"'�/"Y�
a) Conflict with or obstruct implementation of the applicable
air uality Ian?
A
b) Violate any air quality standard or contribute substantially to
an existing or projected air quality violation?
X
c) Result in a cumulatively considerable net increase of any
criteria pollutant for which the project region is non -
attainment under an applicable federal or state ambient air
X
quality standard (including releasing emissions which
exceed quantitative thresholds for ozone precursors)?
d) Expose sensitive receptors to substantial pollutant
concentrations?
X
e) Create objectionable odors affecting a substantial number
of people?
X
or through
as a
n local or
e California X
Wildlife
a) Have a substantial adverse effect, either directly
habitat modifications, on any species identified
candidate, sensitive, or special status species i
regional plans, policies, or regulations, or by th
Department of Fish and Game or U.S. Fish and
Service?
The Planning Center • Page 10 City of La Quinta Housing Element • August 2004
PACly-42 (WurdPerfca)1h'rivirinmrnraAlS ND.dnr
a) Have a substantial adverse effect, either directly
habitat modifications, on any species identified
candidate, sensitive, or special status species i
regional plans, policies, or regulations, or by th
Department of Fish and Game or U.S. Fish and
Service?
The Planning Center • Page 10 City of La Quinta Housing Element • August 2004
PACly-42 (WurdPerfca)1h'rivirinmrnraAlS ND.dnr
2. Enviro'nncental Checklist
Less Than
Significant
Potentially
With
Less Than
Significant
Mitigation
Significant.
No
Issues
Impact
Incor ocated
Impact
Impact
b) Have a substantial adverse effect on any riparian habitat or
other sensitive natural community identified in local or
regional plans, policies, regulations, or by the Cardomia
X
Department of Fish and Game or U.S. Fish and Wildlife
Service?
c) Have a substantial adverse effect on federally protected
wetlands as defined by Section 404 of the Clean Water Act
(including, but not limited to, marsh, vernal pool, coastal,
X
etc.) through direct removal, filling, hydrological
Interruption, or other means?
d) Interfere substantially with the movement of any native
resident or migratory fish or wildlife species or with
X
established native resident or migratory wildlife corridors,
or Impede the use of native wildlife nursery sites?
e) Conflict with any local policies or ordinances protecting
biological resources, such as a tree preservation policy or
X
ordinance?
f) Conflict with the provisions of an adopted Habitat
Conservation Plan, Natural Community Conservation Plan.,
X
or other approved local, regional, or state habitat
conservation ?
•t ,. , `i.:Y�:t ..`': :if
!_ '•'.':'`+.s'�.i,g=_1iy
•,;•rY•t„'_t.t+...`�rw�".�'.'-y,:: ,i y+.
a) Cause a substantial adverse change in the significance of a
historical resource as defined in § 15064.5?
X
b) Cause a substantial adverse change in the significance of
X
an archaeological resource pursuant to § 15064.5?
c) Directly or indirectly destroy a unique paleontological
resource or site or unique geologic feature?
X
d) Disturb any human remains, including those interred
outside of formal cemeteries?
mom
X
—
a) Expose people or structures to potential substantial adverse
—
cry. •.7:r Y'-
effects, including the risk of loss, injury, or death Involving:
X
Rupture of a known earthquake fault, as defeated on the
most recent Aiquist Priolo Earthquake Fault Zoning Map,
issued by the State Geologist for the area or based on other
X
substantial evidence of a known fault? Refer to Division of
Mines and Geology Special Publication 42.
ii Strong seismic ground shaking?
X
III Seismic -related ground failure, including liquefaction?
X
_
iv Landslides?
X
b Result in substantial soil erosion or the loss of topsoil?
X
c) Be located on a geologic unit or soil that is unstable, or that
would become unstable as a result of the project, and
potentially result in on- or off -site landslide, lateral
X
spreading, subsidence, liquefaction or collapse?
d) Be located on expansive soil, as defined in Table 18-1-B of
the Uniform Building Code (1994), creating substantial risks
X
to life or property?
City of La Quinta Housing Element • August 2004 The Planning Center • Page 11
PAClq-02 (W*rdPrrlar)1firrvirYffmrmi NS ND.A.
2. Environmental Checklist
Less Than
Significant
Potentially
With
Less Than
Significant
Mitigation
Significant
No
Issues
Impact
Incorporated
Impact
Impact
e) Have soils incapable of adequately supporting the use of
septic tanks or alternative wastewater disposal systems
X
where sewers are not available for the disposal of
wastewater?
.z
a) Create a significant hazard to the public or the environment
through the routine transport, use, or disposal of hazardous
X
materials?
b) Create a significant hazard to the public or the environment
through reasonable foreseeable upset and accident
X
conditions involving the release of hazardous materials into
the environment?
c) Emit hazardous emissions or handle hazardous or acutely
hazardous materials, substances, or waste within one-
X
quarter mile of an existing or proposed school?
d) Be located on a site which is included on a list of hazardous
materials sites compiled pursuant to Government Code
X
Section 65962.5 and, as a result, would it create a
significant hazard to the public or the environment?
e) For a project located within an airport land use plan or,
where such a plan has not been adopted, within two miles
of a public airport or public use airport, would the project
X
result in a safety hazard for people residing or working in
the project area?
f) For a project within the vicinity of a private airstrip, would
the project result in a safety hazard for people residing or
X
working in the project area?
g) Impair implementation of or physically interfere with an
adopted emergency response plan or emergency
X
evacuation Ian?
h) Expose people or structures to a significant risk of loss,
injury or death involving wildland fires, including where
X
wildlands are adjacent to urbanized areas or where
residences are intermixed with wildlands?
4 :� :.; P YP • �V A��l� R.. h i
a) Violate any water quality standards or waste discharge X
requirements?
b) Substantially deplete groundwater supplies or interfere
substantially with groundwater recharge such that there
would be a net deficit in aquifer volume or a lowering of the
local groundwater table level (e.g., the production rate of
X
pre-existing nearby wells would drop to a level which would
not support existing land uses or planned uses for which
permits have been granted)?
c) Substantially alter the existing drainage pattern of the site or
area, including through the alteration of the course of a
X
stream or river, in a manner which would result in
substantial erosion or siltation on- or off -site?
The Planning Center & Page 12 City of La Quinta Housing Element • August 2004
AICIi1-02(Wm-dPrrJr�t)11:nvi+•,mmrntaAIS_NU.dx
2. Environmental Checklist
Less Than
Significant
Potentially
With
Less Than
Significant
Mitigation
Significant
No
Issues
Impact
incur rated
/m ct
Im act
d) Substantially alter the existing drainage pattern of the site or
area, including through the alteration of the course of a
stream or river, or substantially increase the rate or amount
X
of surface runoff in a manner which would result in flooding
on- or off -site?
e) Create or contrbute runoff water which would exceed the
capacity of existing or planned stormwater drainage
X
systems or provide substantial additional sources of
polluted runoff?
_
Otherwise substantially degrade waterquality?
X
g) Place housing within a 100-year flood hazard area as
mapped on a federal Flood Hazard Boundary or Flood
X
Insurance Rate Map or other flood hazard delineation map?
h) Place within 100-year flood hazard area shuctures which
X
would Impede or redirect flood flows?
Expose people or structures to a significant risk of loss,
injury or death involving flooding, including flooding as a
X
result of the failure of a levee or dam?
j Inundation by seiche, tsunami, or mudflow?
X
a divide an established commun
X
b) Conflict with any applicable land use plan, policy, or
regulation of an agency with jurisdiction over the project
(including, but not limited to the general plan, specific plan,
X
local coastal program, or zoning ordinance) adopted for the
purpose of avoiding or mitigating an environmental effect?
c) Conflict with any applicable habitat conservation plan or
X
natural comrnun conservation ?
a) Result in the loss of availability of a known mineral
resource that would be a value to the region and the
X
residents of the state?
b) Result In the loss of availabii ty of a locally important
mineral resource recovery site delineated on a local general
X
plan, specific Clan or other land use ?
a) Exposure of persons to or generation of noise levels in
excess of standards established in the local general plan or
X
noise ordinance, or applicable standards of other agencies?
b) Exposure of persons to or generation of excessive
-
X
roundbome vibration or groundbome noise levels?
c) A substantial permanent increase in ambient noise levels in
the project vicinity above levels existing without the
X
project?
d) A substantial temporary or periodic increase in ambient
noise levels in the project vicinity above levels existing
X
without the project?
City of La Quinta Housing Element • August 2004 The Planning Center • Page 13
PAClq-02 (WordPer)r&u)%ENsirimmenkdUS NU.dx-
2. Environmental Checklist
Less Than
Significant
Potentially
With
Less Than
Significant
Mitigation
Significant
No
Issues
Impact
Incorporated
Impact
Impact
e) For a project located within an airport land use plan or,
where such a plan has not been adopted, within two miles
of a public airport or public use airport, would the project
X
expose people residing or working in the project area to
excessive noise levels?
Q For a project within the vicinity of a private airstrip, would
the project expose people residing or working in the project
X
area to excessive noise levels?
a) Induce substantial population growth in an area, either
'
directly (for example, by proposing new homes and
X
businesses) or indirectly (for example, through extension of
roads or other infrastructure)?
b) Displace substantial numbers of existing housing,
necessitating the construction of replacement housing
X
elsewhere?
c) Displace substantial numbers of people, necessitating the
construction of replacement housing elsewhere?
X
a Fire protection?
X
b Police protection?
X
c Schools?
X
d Parks?
X
e Other public facilities?
i X
17 x � ! � a �. tir _ ..
-
_ 1'. ; f' ,:t�� ;1•: , . J ;;..:: y ... _,.- ,••-::.: ..ter
a) Would the project increase the use of existing neighborhood
and regional parks or other recreational facilities such that
substantial physical deterioration of the facility would occur
X
or be accelerated?
b) Does the project include recreational facilities or require the
construction or expansion of recreational facilities which
might have an adverse physical effect on the environment?
X
a) Cause an increase in traffic which is 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
X
vehicle trips, the volume to capacity ratio on roads, or
congestion at intersections)?
b) Exceed, either individually or cumulatively, a level of service
standard established by the county congestion
X
management agency for designated roads or highways?
c) Result in a change in air traffic patterns, including either an
increase in traffic levels or a change in location that results
X
in substantial safety risks?
d) Substantially increase hazards due to a design feature (e.g.,
sharp curves or dangerous intersections) or incompatible
X
uses e.g., farm equipment)?
The Planning Center + Page 14 City of La Quinta Housing Element • August 2604
P;%Clq-02 (WfirdPnJrct)IErrvir,,nmrntaNS NU.d.
2. Environmental Checklist
Less Than
Significant
Potentially
With
Less Than.
Significant
Nitfgation
Significant
No
Issues
Impact
Incorporated
Impact
Impact
e Result in inadequate emergent access?
X
Result in Inadequate parking capacity?
X
g) Conflict with adopted policies, plans, or programs
supporting aftemative transportation (e.g., bus turnouts,
X
bicycle racks)?
...
a) Exceed wastewater treatment requirements of the
X
7�—
applicable Regional Water Quality Control Board?
b) Require or result in the construction of new water or waste
water treatment facilities or expansion of existing facilities,
X
the constriction of which could cause significant
environmental effects?
c) Require or result in the construction of new storm water
drainage facilities or expansion of existing facilities, the
X
construction of which could cause significant
environmental effects?
d) Have sufficient water supplies available to serve the project
from existing entitlements and resources or are new or
X
expanded entitlements needed?
e) Result in a determination by the wastewater treatment
provider, which serves or may serve the project that it has
X
adequate capacity to serve the projects projected demand
in addition to theprovider's existing comet tments?
f) Be served by a landfill with sufficient permMed capacity to
X
accommodate the project's solid waste disposal needs?
g) Comply with federal, state, and local statutes and
X
re related to sold waste?
a) Does the project have the potential to degrade the quality of
..,'!i �,�v_�'''
')'F:ri.: � Y.'"v'hi.,`. .�Y i'. :!i::[..:t i. • .+i. 'r' •.'-+
the environment, substantially reduce the habitat of a fish or
wildlife species, cause a fish or wildlife population to drop
below self-sustaining levels, threaten to eliminate a plant or
X
animal community, reduce the number or restrict the range .
of a rare or endangered plant or animal or eliminate
important examples of the major periods of California
histpry or prehistory?
b) Does the project have impacts that are individually limited,
but cumulatively considerable? ("Cumulatively
considerable" means that the incremental effects of a
X
project are considerable when viewed in connection with
the effects of past projects, the effects of other current
projects, and the effects of probable futureprojects.)
c) Does the project have environmental effects which will
cause substantial adverse effects on human beings, either
X
directly or indirectly?
City of La Quinta Horsing Element • Augur 2004 The Planning Center # Page 15
A%Clq-02 (WordPrrf a) IF.nti►enmentalVS ND.Ar
2. Environmental Checklist
2.5 REFERENCES
No. Reference
1. La Quinta General Plan Update and MEA, August 2002.
2. City of La Quinta Housing Element, October 1995.
3. City of La Quinta Website, 2002.
4. U.S. Census, 2003.
The Planning Center • Page 16 City of La Quinta Housing Element • August 2004
PAC14-1)2 (W.irdPerfe,,)IF.nvininmentaAIS NU.d,.
3. Environmental Analysis
Section 2.3 provided a checklist of environmental impacts. This section provides an evaluation of the
impact categories and questions contained in the checklist and identify mitigation measures, if
applicable.
3.1 AESTHETICS
Have a substantial adverse effect on a scenic vista?
Less than Significant Impact. Development anticipated by the draft Housing Element would be required
to follow the guidelines of the City's General Plan, Zoning Ordinance, Grading Ordinance, and Design
Review process, which are designed to proactively eliminate or minimize conflicts between visual
resources and urban development. It is not anticipated that any scenic vistas would be adversely
affected by future development. No mitigation measures are necessary.
Substantially damage scenic resources, Including, but not limited to, trees, rock outcroppings, and
historic buildings within a state scenic highway?
Less than Significant Impact. According to the Department of Transportation, the City of La Quinta does
not contain any County -designated scenic highways. Additionally, development anticipated by the draft
Housing Element would be required to follow the guidelines of the City's General Plan, Zoning
Ordinance, Grading Ordinance, and Design Review process, which are designed to proactively eliminate
or minimize conflicts between visual resources and urban development. No mitigation measures are
necessary.
Substantially degrade the existing visual character or quality of the site and Us surroundings?
Less Than Significant Impact. The proposed project estimates up to 9,204 units for development.
However, without specific details regarding future developments, it is impossible to determine visual
impacts with any precision. Future projects developed in accordance with the Land Use Element of the
General Plan and development ordinances would not create a demonstrable negative aesthetic effect to
the City's visual qualities. It is not anticipated that any significant visual impacts would occur because all
future development must undergo the City's Design Review process. No mitigation measures are
necessary.
Create a new source of substantial light or glare, which would adversely affect day or nighttime
views in the area?
Less Than Significant Impact. New development of projects in accordance with the City's draft Housing
Element would create sources of light and glare in the City. As the 9,204 units are developed, greater
intensity and density of development would result in increased light and glare in the City due to exterior
lighting, lighting of streets and walkways, and interior lighting which could be visible from the outside.
To minimize potential light and glare impacts, future development proposed by the draft Housing
.Element over the next five years would be required to be in compliance with the Land Use Element, and
would be further reduced through the implementation of the City's development regulations and Design
Review process. In addition, through the City's environmental review process future development would
be evaluated for potential light and glare impacts. No mitigation measures are required.
City of La Quinta Horsing Element a August 2004 The Planning Center • Page 17
PAC1q-02 (IfWordPerfert)lF.svirmtmmtaAIS ND.da-
3 . Environmental Analysis
3.2 AGRICULTURE RESOURCES
In determining whether impacts to agricultural resources are significant environmental effects, lead
agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1997)
prepared by the California Dept. of Conservation as an optional model to use in assessing impacts on
agriculture and farmland.
a) Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland),
as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of
the California Resources Agency, to non-agricultural use?
Less Than Significant Impact. According to the Farmland Mapping and Monitoring Program, the City of
La Quinta does not contain Prime, Unique and Farmland of Statewide Importance. Although vacant and
underutilized land resources may be developed with 9,204 housing units as anticipated by the draft
Housing Element, this development would occur on land designated for residential use. No Prime
Farmland, Unique Farmland or Farmland of Statewide Importance would be impacted. No mitigation
measures are necessary.
It should be noted there is a significant potential for recycling of land within Planning Area 1 and 2, where
a majority of the land is currently utilized for agricultural pursuits. Residentially uses are permitted within
this area, as the lands are residentially zoned. These lands are assumed to redevelop at 90 percent of
total acreage to accommodate low -density residential uses, as designated by the General Plan.
Conflict with existing zoning for agricultural use, or a Williamson Act contract?
No Impact. The potential development of up to 9,204 housing units would occur in residentially -zoned
land use categories. Furthermore, there are no properties in the City covered by a Williamson Act
contract. No mitigation measures are necessary.
Involve other changes in the existing environment which, due to their location or nature, could
result in conversion of Farmland, to non-agricultural use?
Less Than Significant Impact. Although vacant land may be developed as anticipated by the draft
Housing Element, this development would primarily occur on vacant land zoned for residential uses.
The City of La Quinta does not utilize an agricultural zone designation, although an Agricultural Overlay
has been applied to underlying residential designations in the southern, planning area, permitting
existing agricultural uses to continue until such time as the landowner chooses to develop. The
conversion of land use from agricultural to residential use in residentially zoned districts is consistent
with the City of La Quinta's General Plan and Zoning Code. In addition, any future development would
be evaluated through the City's environmental review process on a project -by -project basis for potential
impacts to existing farmland. No mitigation measures are necessary.
3.3 AIR QUALITY
Where available, the significance criteria established by the applicable air quality management or air
pollution control district may be relied upon to make the following determinations. Would the project:
a) Conflict with or obstruct implementation of the applicable air quality plan?
Less Than Significant Impact. The Housing Element identifies an assigned growth need in the City of
9,204 housing units for development through 2005. According to the South Coast Air Quality
Management District CEQA Air Quality Handbook, development of 9,204 units would normally constitute
The Planning Center • Page 18 City of La Quinta Housing Element • August 2004
PACIy-02 (WordPerje,r)lEnvirmimentaAIS ND.d,,.-
3. Environmental Analysis
a significant air quality impact. New development would generate pollutant emissions due to new
vehicle trips, use of equipment, and off -site power and natural gas generation. During the construction
phases of individual development projects, construction vehicles and activities would also generate
emissions.
The La Quinta planning area is located within the boundaries of the South Coast Air Basin and is under --
the jurisdiction of the South Coast Air Quality Management District. The climate in the South Coast Air
Basin is determined by its terrain and geographical location. In general, the Basin is a coastal plain with
connecting broad valleys and low hills. The Pacific Ocean forms the southwestern border and high
mountains surround the rest of the Basin. The region lies in the semi -permanent high-pressure zone of
the eastern Pacific. The resulting climate is mild and tempered by cool ocean breezes near the ocean.
This climatological pattern is rarely interrupted. However, there do exist periods of extremely hot
weather, winter storms, and Santa Ana wind conditions.
Even though the Basin has a semi -arid climate, air near. the surface is generally moist because of the
presence of a shallow marine layer. With very low average wind speeds, there is a limited capacity to
disperse air contaminants horizontally. The dominant daily wind pattern is an onshore daytime breeze
and an offshore nighttime breeze. The typical wind flow pattern fluctuates only with occasional winter
storms or strong northeasterly winds from the mountains and deserts north of the Basin. Summer wind
flow patterns represent worst -case conditions, as this is the period of higher temperatures and more
sunlight, which results in ozone formation.
The vertical dispersion of air pollutants in the South Coast Air Basin is limited by temperature inversions
-- in the atmosphere close to the earth's surface. Temperature normally decreases with altitude and a
reversal of this atmospheric State, where temperature increases with altitude, is called an inversion. The
height from the earth to the inversion base is known as the mixing height.
Inversions are -generally lower in the nighttime when the ground is cool than during the daylight hours
when the sun warms the ground and in turn the surface air layer. As this heating process continues, the
temperature of the surface air layer approaches the temperature of the inversion base causing heating
along its lower edge. If enough warming takes place, the inversion layer becomes weak and opens up
to allow the surface air layers to mix upward. This can be seen in the middle to late afternoon on a hot
summer day when the smog appears to clear up suddenly. Winter inversions typically break earlier in
the day, preventing excessive contaminant build-up.
The combination of stagnant wind conditions and low inversions produces the greatest pollutant
concentrations. On days of no inversion or high wind speeds, ambient air pollutant concentrations are , ..
lowest. During periods of low inversions and low wind speeds, air pollutants generated in urbanized
areas are transported predominantly onshore into Riverside and San Bernardino Counties. In the winter;-'
the greatest pollution problems are carbon monoxide and oxides of nitrogen because of extremely low
inversions and air stagnation during the night and early morning hours. In the summer, the longer
daylight hours and the brighter sunshine combine to cause a reaction between hydrocarbons and oxides
of nitrogen.
Air Pollution Constituents
Both the State of California and the federal government have established health based Ambient Air
Quality Standards (AAQS) for six air pollutants. As shown in Table 1, these pollutants include ozone,
►--- carbon monoxide, nitrogen dioxide, sulfur dioxide, suspended particulate matter (PM10) and lead.
(PM2.5 particulate matter has also recently been added to this listing; however, the SCAQMD does not
currently have data to document ambient conditions or quantify these emissions. Therefore, PM2.5
impacts are omitted from this analysis.) In addition, the State has set standards for sulfates, hydrogen
City of La Quinta Housing Elewnt * August 2004 The Planning Center • Page 19
PAC1q-02 (WordPer)6i)1F.mironmrntAI\IS ND -&A
3 . Environmental Analysis
sulfide, vinyl chloride and visibility reducing particles. These standards are designed to protect the
health and welfare of the populace with a reasonable margin of safety.
In addition to primary and secondary Ambient Air Quality air pollution standards, the State of California
has established a set of episode criteria for ozone, carbon monoxide, nitrogen dioxide, sulfur dioxide and
particulate matter. These criteria refer to episode levels representing periods of short-term exposure to
air pollutants, which actually threaten public health.
Regional Air Quality
As discussed above, both the State and Federal governments have established health based Ambient
Air Quality Standards (AAQS) for six air pollutants: carbon monoxide, ozone, nitrogen dioxide, sulfur
dioxide, lead and PM 10 particulate matter. The South Coast Air Basin (SCAB) does not attain State and
Federal Ambient Air Quality Standards for four of the six criteria air pollutants. The Basin is in
compliance with federal sulfur dioxide and lead standards, but ambient carbon monoxide, ozone and
particulate levels (PM10) may reach twice the standards. In addition, SCAB is currently the only area in
the country that does not attain the federal nitrogen dioxide standard. However, based on nitrogen
dioxide levels meeting the federal standard within the past few years, the SCAQMD is in the process of
requesting re -designation. These air contaminants exceed the more stringent State Ambient Air Quality
Standards by an even higher margin.
Since dioxide levels have not been meeting the federal standard within the past few years, the SCAQMD
is in the process of requesting re -designation. These air contaminants exceed the more stringent State
Ambient Air Quality Standards by an even higher margin.
Local Air Quality
The City of La Quinta is located within Source Receptor Are (SRA) 30, which includes monitoring stations
in Palm Springs and Indio. According to the Master Environmental Assessment 2001, data collected at
the Indio monitoring station are most representative of the air quality conditions in the City of La Quinta.
These stations monitor ozone, carbon monoxide, nitrogen dioxide, sulfur dioxide, lead, and suspended
particulate matter throughout the year. The communities within an SRA are expected to have similar
climatology and subsequently, similar ambient air pollutant concentrations. Ozone and PM10 are the
most prevalent in the Coachella Valley and the City of La Quinta. Table 1 shows the Ambient Air Quality
Standards.
The Planning Center • Page 20 City of La Quinta Horsing Element • August 2004
P:1CIq-02 (WiirdPerJat)kEnviiyjnnxntaAIS NU.dx
3. Environmental Analysis
TABLE 1
AMBIENT AIR QUALITY
STANDARDS
Air Pollutant
California
Federal
Concentratfon
Primary >
Secondary >
Ozone
0.09 pprn,1-hr. av . >
0.12 pprn,1-hr. avg.
0.12 pprn,1-hr. avg.
Carbon Monoxide
9 ppm, 8-hr. avg. >'
9 ppm, 8-hr. avg °
9 ppm, 8-hr. avg.
20 ppm,1-hr. avg. >
35 pprn,1-hr. avg. >
35 pprn,1-hr. avg. >
Nitrogen Dioxide
0.25 pprn, 1-hr. avg. >°
0.053 pprn, annual avg.°
0.053 pprn, annual avg'
Sulfur Dioxide
0:04 pprn, 24-hr. avg.> =with
0.03 ppm, annual avg. 0.14
0.50 ppm, Mr. avg.
ozone> =0.10 ppm, 1-hr. avg. or TSP
ppm, 24-hr. avg.
> = 100 ug/m3, 24-hr. avg.
0.25 pprn,1-hr. av .>'
Suspended Particulate
30 ug/m3, annual geometric mean> 50
50 ug/m3, annuah arithmetic
50 ug/0, annual
Matter (PM10)
ug/m3, 24-hr. avg. >r
mean
arithmetic mean
150 n?, 24-hr. avg.
150 0, 24-hr. avg.
Sulfates
25 m3, 24-hr. avg. > =
Lead
1.5 m3, 30-day avg. > =
1.5 ugtrn3, calendar quarter
1.5 ugtm3, calendar quarter
a. tnecuve December 15,198z. The standards were previously 10 Mm, 12-hour average and 40 ppm, 1-hour average.
b. Effective September 13,1985, standard changed from > 10 mg(m3 (> = 9.3 ppm) to > 9ppm (> = 9.5 ppm).
C. Effective March 9,1987, standard charged from > = .25 ppm to > .25 ppm.
d. Effective July 1,1985, standard changed from > 100 ug/m3 (> .0532 ppm) to > .053ppm (> .0534 ppm).
e. Effective October 5,1984. The standard was previously .5 ppm, 1-hour average.
f. Effective August 19,1983. The standards were previously 60 ug(m3 TSP, annual geometric mean, and 100 ug/m3 TSP, 24-lour average.
g. Effective July 1,1987. The standards were previously: Primary- Annual geometric mean TSP > 75 ug(m3, and a 24-hour average TSP > 260
ughn3. Secondary- Annual geometric mean TSP > 60 ug/m3, and a 24-hour average TSP > 150 ug/m3.
h. Effective October 18,1989. The standard was previously In sufficient amount to reduce the prevailing visibility to less than 10 miles at relative
humidity less than 70%,1 observation", and was based on human observation rather than instrumental measurement
Source: '1997 Air Quality Management Plan', South Coast Air Duality Management District C70
New development in the City must comply with density and intensity requirements in the Land Use
Element and the current Zoning Ordinance of the City. Implementation of the Housing Element is in
compliance with the City of La Quinta Land Use Element of the General Plan, which makes the housing
growth consistent with the AQMP. Individual development proposals would be evaluated in detail to
determine consistency with the AQMD. No mitigation measures are necessary.
Violate any air quality standard or contribute substantially to an existing or projected air quality
violation?
Less Than Significant Impact. The draft Housing Element proposes development of up to 9,204 housing
units throughout the planning period of 1998-2005. New development would generate pollutant
emissions due to new vehicle trips, use of equipment, and off -site power and natural gas generation.
During the construction phases of individual development projects, construction vehicles and activities
would also generate emissions. Air pollutant emissions associated with the project could occur over the
short-term for demolition, site preparation and construction activities to support the proposed land use.
In addition, emissions could result from the long-term operation of the completed development.
City of La Quinta Housing Element • August 2004 The Planning Center • Page 21
PAC4-02 (WwdPerfect)U?nvirmtmentwAIS ND.dt�
3. Environmental Analysis
Standards of Significance
Thresholds for Construction Emissions
The following significance thresholds for construction emissions have been established by the SCAQMD.
Projects in the South Coast Air Basin with construction -related emissions that exceed any of these
emission thresholds should be considered to be significant:
2.5 tons per quarter or 75 pounds per day of ROC
2.5 tons per quarter or 100 pounds per day of NOx
24.75 tons per quarter or 550 pounds per day of CO
6.75 tons per quarter or 150 pounds per day of PM 10
6.75 tons per quarter or 150 pounds per day of Sox
Thresholds for Operational Emissions
Specific criteria for determining whether the potential air quality impacts of a project are significant are
set forth in the SCAQMD Handbook. The criteria include emissions thresholds, compliance with State
and National air quality standards and conformity with existing State Implementation Plan (SIP) or
consistency with the current Air Quality Management Plan (AQMP). The daily operational emissions
"significance" thresholds are:
Regional Emissions Thresholds
55 pounds per day of ROC
55 pounds per day of NOx
550 pounds per day of CO
150 pounds per day of PM 10
150 pounds per day of SOx
Projects in the South Coast Air Basin with operation -related emissions that exceed any of the emission
thresholds should be considered to be significant.
Local Emission Standards
California State 1-hour CO standard of 20.0 ppm
California State 8-hour CO standard of 9.0 ppm
The significance of localized project impacts depends on whether ambient CO levels in the vicinity of the
project are above or below state and federal CO standards. If ambient levels are below the standards, a
project is considered to have significant impacts if project emissions result in an excess of one or more
of these standards. If ambient levels already exceed a state or federal standard, then project emissions
are considered significant if they increase ambient concentrations by a measurable amount. The
The Planning Center • Page 22 City of La Quinta Housing Element • August 2004
PAC4q-()2 (WordPsrfict)kE"iranmentaAIS NU.dor
3. Environmental Analycir
SCAQMD defines a measurable amount as 1.0 ppm or more for the 1-hour CO concentration by or 0.45
ppm or more for the 8-hour CO concentrations.
Short -Term Construction -Related Impacts
Short-term emissions are those occurring during the construction phases of individual developments in
the City. Air quality impacts may occur during the site preparation and construction activities required to,'
prepare the proposed on -site land use. Major sources of emissions during this phase include exhaust
emissions generated during demolition of an. existing structure, site preparation and subsequent
structure erection and fugitive dust generated as a result of soil disturbances during excavation activities.
To minimize construction related air quality impacts, future development projects would be required to
comply with SCAQMD Rule 403. Additionally, through the City's environmental review process future
development projects would be evaluated for potential construction -related air quality impacts. This
evaluation would determine where appropriate mitigation measures would be required to reduce
potential construction related air quality impacts to a level that would be less than significant.
Long -Term Air Quality Impacts
Long-term air quality impacts are those associated with the emissions produced from project -generated
vehicle trips as well as from stationary sources related to the use of natural gas for heating and use of
electricity for lighting and ventilation. The net increase in new development anticipated by the draft
Housing Element is related to a change in the number of housing units and additional vehicle trips.
Without specific details regarding future development, such as square footage and vehicle trips, it is
impossible to determine long-term emissions.J16D
C070
New development in La Quinta would be required to comply with pertinent SCAQMD regulations to
prevent the generation of significant pollutant emissions and toxic emissions and with the City's
Transportation Control Measures to reduce air pollution. In addition, traffic.signal and roadway
improvements implemented in the City should be expected to reduce traffic congestion and the
attendant vehicle idling emissions. In addition, each development would be evaluated on an individual
basis regarding compliance with air quality standards. No mitigation measures are necessary.
Result In -a cumulatively considerable net increase of any criteria pollutant for which the project
region Is non -attainment under an applicable federal or state ambient air quality standard
(including releasing emissions which exceed quantitative thresholds for ozone precursors)?
Less Than Significant Impact. The draft Housing Element proposes development of up to an additional
9,204 housing units, including single-family residential and mufti -family residential, for development on
multiple sites through 2005. New development would generate pollutant emissions due to new vehicle
trips, use of equipment, and off -site power and natural gas generation. Computer modeling would be
completed for each development to track whether any emissions would be in excess of State or Federal
ambient air quality standards. Development anticipated by the draft Housing Element is in compliance
with the growth projections in the City's Land Use and Circulation Elements.
New residential development in La Quinta would be required to comply with pertinent SCAQMD
regulations to prevent the generation of criteria pollutant emissions. Future development, however, may
result in both project related and cumulatively significant unavoidable adverse impacts related to air
�--- quality. Nevertheless, each development would be evaluated on an individual basis before specific
determinations are made: No additional mitigation measures are necessary.
City of La Quinta Housing Element *A ugurt 2004 The Planning Center • Page 23
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3. Environmental Analysis
Expose sensitive receptors to substantial pollutant concentrations?
Less Than Significant Impact. Construction of individual projects could lead to fugitive emissions and
other pollutants affecting adjacent sensitive land uses. Increased traffic volumes on City streets could
also lead to increases in traffic congestion and the associated vehicle emissions. Because of the
conceptual nature of the anticipated development, air quality analysis would be completed for each
development to determine whether emissions from proposed development would be in excess of State
or Federal ambient air quality standards. No impacts would result from this project. No mitigation
measures are necessary.
Create objectionable odors affecting a substantial number of people?
Less Than Significant Impact. Odors are one of the most obvious forms of air pollution to the general
public. Odors can present significant problems for both the source and the surrounding community.
Although offensive odors seldom cause physical harm, they can cause agitation, anger and concern to
the general public. Most people determine an odor to be offensive (objectionable) if it is sensed longer
than the duration of a human breath, typically 2 to 5 seconds.
The only potential odors associated with the project are from the application of asphalt and paint during
construction periods. These odors, if perceptible, are common in the environment and would be of very
limited duration. Through the City's environmental review process, each individual project would be
evaluated for the potential creation of objectionable odors on an individual basis at the time it is
proposed. It is anticipated that, any odor impacts would not be construed as significant. No mitigation
measures are necessary.
3.4 BIOLOGICAL RESOURCES
a) Have a substantial adverse effect, either directly or through habitat modifications,:on any
species identified as a candidate, sensitive, or special status species in local or regional
plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish
and Wildlife Service?
Less Than Significant Impact. The La Quinta planning area is located within the habitat for the federally
threatened Coachella Valley Fringe -Toed Lizard and federally endangered Peninsular Bighorn Sheep. In
addition, the conversion of undeveloped areas within the La Quinta planning area to urban uses
according to the General Plan would potentially contribute to destruction of habitat typically associated
with the Coachella Valley Fringe -Toed Lizard, the Palm Springs Ground Squirrel, and the Desert Tortoise.
In addition to the endangered animal species, the Coachella Valley Milk -Vetch is classified as a federally
listed endangered plant species. However, plants do not have the same protection as animals and the
prohibition of "taking" of the plant does not apply, unless the species is on federal land. The Biological
Resources section of the La Quinta Draft General Plan/Master Environmental Assessment 2001 identifies
that the La Quinta area also contains habitat suitable for the Flat -Tailed Horned Lizard, Chuckwalla, the
Burrowing Owl, the Crissal Thrasher, the Le Conte's Thrasher, the Loggerhead Strike, the Palm Springs
Little Pocket Mouse, and the Palm Springs round -tailed ground. These species are all identified in the
City's General Plan/Master Environmental Assessment as being federal or state -listed Species of Special
Concern. Plants and invertebrates in La Quinta identified as Species of Concern include California
Ditaxis, Flat -Seeded Spurge, Glandular Ditaxis, Coachella Valley Giant Sand Treader Cricket, Coachella
Valley Jerusalem Cricket, and Moth Lacewing ("Cheeseweed Owifly").
The City participates in the Coachella Valley Fringe -toed Lizard Habitat Conservation Plan and is
currently in the process of preparing the Coachella Valley Multi -species Habitat Conservation Plan, with
other members of the Coachella Valley Association of Governments (CVAG). These Plans provide
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3. , Environmental Analysis
protection for the Fringe -toed Lizard and a wide -range of plant communities and special -status animal
species. Any proposed development should not interfere with conservation plans and comply with the
policies as listed in Natural Resources Element of the General Plan. Through the City's environmental
review process, future development projects on vacant land shall be reviewed for their potential impacts
to existing wildlife and habitat. Agricultural lands shall be exempt with the exception that the site shall be
surveyed for the presence of the burrowing owl. No mitigation measures are necessary. -
Have a substantial adverse effect on any riparian habitat or other sensitive natural community .
Identified in local or regional plans, policies, regulations, or by the California Department of Fish
and Game or U.S. Fish and Wildlife Service?
.Less than Significant Impact. The draft Housing Element anticipates an additional 9,204 housing units,
including single-family residential and multi -family residential, for development through 2005. The
development would be located on land currently designated for residential use. The City would protect -
important plant communities, as identified in the Biological Resources section of the General Plan/Master
Environmental Assessment, by requiring development proposals to avoid these sensitive areas through;
clustering, restoration, re -vegetation, and land dedication. Development would be evaluated for potential
impacts to biological resources on an individual basis as it is proposed. No mitigation measures are
necessary.
Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the
Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct
removal, filling, hydrological interruption, or other means?
Less than Significant Impact. The draft Housing Element anticipates an additional 9 204 housing units
9 P 9 P � 9 4 am
-
including single-family residential and multi -family residential, for development through 2005. The
development would be located on land designated for residential use. In accordance with the City's
Open Space Element, which requires the preservation of unique and valuable biological resources as
open space, to the greatest extent practical, it is unlikely that proposed development would adversely
affect any federally protected wetlands, although each development would be evaluated on an individual
basis as it is proposed. No mitigation measures are necessary.
Interfere substantially with the movement of any native resident or migratory fish or wildlife
species or with established native resident or migratory wildlife corridors, or impede the use of
native wildlife nursery sites?
Less than Significant Impact. The draft Housing Element anticipates an additional 9,204 housing units,
including single-family residential and multi -family residential, for development through 2005. The
development would be located on land currently zoned and designated for residential use. The vacant''
parcels proposed for development are located throughout the City, and any proposed development
would individually be subject to a strict environmental review process and adherence to all General Plan
Elements. Measures in the City's Open Space Element require the development of linkages between
open space areas. (Policy 6) Therefore, it is unlikely that development would interfere with the
movement of any fish or wildlife species or migratory wildlife corridors. Future development projects
would be evaluated for potential impacts to biological resources through the City's environmental review
process. No mitigation measures are necessary.
Conflict with any local policies or ordinances protecting biological resources, such as a tree
preservation policy or ordinance?
Less than Significant Impact. The draft Housing Element anticipates an additional 9,204 housing units,
including single-family residential and multi -family residential, for development through 2005. The
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3. Environmental Analysis
development would be located on vacant or underutilized land designated for residential use. The
parcels proposed for development are located throughout the City and are typically surrounded by
urbanized development. With adherence to the City's General Plan Elements and environmental review
process, it is unlikely that development of the vacant land would conflict with local policies or ordinances
that protect biological resources. No mitigation measures are necessary.
Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community
Conservation Plan, or other approved local, regional, or state habitat conservation plan?
No Impact. The City participates in the Coachella Valley Fringe -toed Lizard Habitat Conservation Plan
and is currently in the process of preparing the Coachella Valley Multi -species Habitat Conservation
Plan, with other members of the Coachella Valley Association of Governments (CVAG). These Plans
provide protection for the Fringe -toed Lizard and a wide -range of plant communities and special -status
animal species. Any proposed development should not interfere with conservation plans and comply
with the policies as listed in Natural Resource Element of the General Plan. Through the City's
environmental review process and with adherence to the General Plan's Land Use and Open Space
Elements, potential residential development would not conflict with the provisions of this, or other
adopted conservation plans. No mitigation measures are necessary.
3.5 CULTURAL RESOURCES
a) Cause a substantial adverse change In the significance of a historical resource as defined in
§15064.5?
Less Than Significant Impact. Section 10564.5 defines historic resources as resources listed or
determined to be eligible for listing by the State Historical Resources Commission, a local register of
historical resources, or the lead agency. Generally a resource is considered to be "historically
significant", if it meets one of the following criteria:
i.) Is associated with events that have made a significant contribution to the broad patterns of
California's history and cultural heritage;
ii.) Is associated with the lives of persons important in our past;
iii.) Embodies the distinctive characteristics of a type, period, region or method of construction, or
represents the work of an important creative individual, or possesses high artistic values; or
iv.) Has yielded, or may be likely to yield, information important in prehistory or history (§15064.5)
The Cultural Resources Element of the La Quinta General Plan includes policies to encourage the
preservation, maintenance, rehabilitation, and/or restoration of cultural resources and prevent the
unnecessary destruction of or adverse effects to such resources in the City and planning area.
Compliance with this and the Land Use Element of the General Plan would ensure less than significant
impacts regarding historical resources in the City. Any potential development would be evaluated on an
individual basis to determine potential impacts to historical resources. No mitigation measures are
necessary.
Cause a substantial adverse change in the significance of an archaeological resource pursuant to
§ 15064.5?
Less than Significant Impact. According to CEQA §15064.5 and Public Resources Code §21083.1, the
proposed project would be considered to have a significant impact if it would cause a substantial
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3. Environmental Analytic
adverse change in the significance of a unique archaeological resource (i.e., an artifact, object, or site)
about which it can be clearly demonstrated that, without merely adding to the current body of
knowledge, there is a high probability that it contains information needed to answer important scientific
research questions, has a special and particular quality such as being the oldest or best available
example of its type, or is directly associated with a scientifically recognized important prehistoric or
historic event or person.
Because if its unique geographical location straddling the shoreline of ancient Lake Cahuilla, a naturally
occurring freshwater lake formed by overflow from the Colorado River, the City of La Quinta contains one
of the most dense concentrations of archaeological sites anywhere in California. The prehistoric sites are
mainly composed of scatters of pottery, burned animal bone, grinding stones, chipped stone,
cremations, and other remains, providing evidence of what must have been a very dense population. in
the I r and I e centuries, prior to the arrival of the first settlers.
For any proposed project site, the City will require a survey by a qualified archaeologist, historian, and/or
architectural historian, as appropriate, to identify any potential cultural resources that may be affected,
unless the preponderance of the evidence demonstrates that such surrey is unnecessary. Further
progress in cultural resource identification, as provided in Policy 1 of the Cultural Resources Element,
and compliance with the Cultural Resources and Land Use Elements of the General Plan will ensure less
than significant impacts regarding historical resources in the City. No mitigation measures are
anticipated.
Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature?
Less than Significant Impact. Several studies have been conducted throughout the City, resulting in the 926a
finding of archaeological and paleontological sites. For any proposed project site, the City will require a C070
survey by a qualified archaeologist, historian, and/or architectural historian, as appropriate, to identify
any potential cultural resources that may be affected, unless the preponderance of the evidence
demonstrates that such survey is unnecessary. In addition, compliance with the Cultural Resources and
Land Use Elements of the General Plan will ensure less than significant impacts regarding historical
resources in the City. No mitigation measures are anticipated. No significant impacts are anticipated as
a result of the proposed project. No mitigation measures are necessary.
Disturb any human remains, Including those interred outside of formal cemeteries?
Less than Significant Impact. Prehistoric sites have been identified within the City of La QUinta. For any
proposed project site, the City will require a survey by a qualified archaeologist, historian, and/or
architectural historian, as appropriate, to identify any potential cultural resources that may be affected,
unless the preponderance of the evidence demonstrates that such survey is unnecessary. Each
development that occurs as anticipated by the. draft Housing Element would be considered on an
individual basis to determine if any human remains exist. In addition, compliance with the Cultural
Resources and Land Use Elements of the General Plan will ensure less than significant impacts
regarding historical resources in the City. No mitigation measures are anticipated. No significant impacts
are anticipated as a result of the proposed project. No mitigation measures are necessary.
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3 . Environmental Analysis
3.6 GEOLOGYAND SOILS
a) Expose people or structures to potential substantial adverse effects, including the risk of loss,
Injury, or death involving:
1.) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo
Earthquake Fault Zoning map, issued by the State Geologist for the area or based on other
substantial evidence of a known fault? Refer to Division of Mines and Geology Special
Publication 42.
Less than Significant Impact. According to the City's 2002 General Plan, no active or
potentially active faults are known to occur within the City of La Quinta or its planning area.
Therefore, the City does not contain any "Earthquake Fault Zones", as defined by the State
of California in the Alquist-Priolo Earthquake Fault Zoning Act. However, two of southern .
California's most active fault zones, the San Andreas and San Jacinto are located in the
vicinity and could impact the planning area: The Elsinore Fault Zone, located about 30 miles
southwest of the City, also has the potential to affect the region, but it has historically been
one of the least active of the large faults in California. The San Andreas Fault is located less
than 3 miles northeast of the City and is the closest major fault system to the City of La
Quinta. The San Jacinto Fault is located approximately ten miles southwest of the City and
has historically produced more large earthquakes than any other fault in Southern California.
According to the City's Environmental Hazards Element, applications for development within
areas located above potentially hazardous (i.e. liquefaction) soils will require, as appropriate,
soil compaction tests to determine effective mitigation measures. Suchh-geotechnical
recommendations may include measures that will have a significant influence upon the
ultimate configuration of a given project's land use plan. Each development that occurs as
anticipated by the draft Housing Element would be considered on an individual basis to
determine the potential impacts the special study zone has on new construction. No
mitigation measures are necessary.
11.) Strong seismic ground shaking?
Less Than Significant Impact. There are a number of faults in the southern California area
that are considered active and may have an effect on the planning area, should they be the
source of an earthquake. These include, but are not limited to: The San Andreas Fault Zone,
the San Jacinto, and the Elsinore Fault Zone.
Any development that occurs in conjunction with the proposed project would be designed to
resist seismic forces in accordance with the criteria and seismic design parameters
contained in the most current version of the Uniform Building Code for seismic zone 4, Title
24 of the California Building Code, and the standards of the Structural Engineers Association
of California. Compliance with these building standards is considered the best possible
means of reducing seismic hazards. Therefore, no significant impacts are anticipated as a
result of implementation of the project.
III.) Seismic -related ground failure, including liquefaction?
Less Than Significant Impact. Liquefaction describes a phenomenon in which cyclic
stresses, produced by earthquake induced ground motion, create excess pore pressures in
relatively cohesionless soils. This occurs in areas where the ground water table is within 50
feet of the ground surface.
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3 . Environmental Analysis
Liquefaction is largely limited to lands containing shallow ground water (within 50 feet of the
ground surface) and sandy, silty soils. Much of the eastern portion of the planning area
contains ground water within 30 feet of ground surface and is susceptible to liquefaction.
Lands in the northern and central portion of the planning area may also be subject to
potential liquefaction hazards, however ground water is generally more than 30 feet below
the surface in these locations. The Santa Rosa and Corel Reef Mountains and their slopes
are not susceptible to liquefaction because they are underlain by granite bedrock.
Modified Mercalli Intensities of VII or higher are believed to be required for liquefaction to
occur. The Mercalli Intensities relate to ground shaking caused by seismic events to its
effects on people, structures and structural elements. According to the Geotechnical and
Seismic Hazards section of the Master Environmental Assessment, the planning area may
also be susceptible to other seismically induced ground failure such as collapsible and t
expansive soils, ground subsidence, and inundation. As part of the City's development
review process, future developmentprojects would be required to prepare geotechnical
studies to abate any perceived hazards to a level that is less than significant. No mitigation
measures are necessary.
iv.) Landslides?
Less Than Significant Impact. Rock slides and landslides can be expected to occur on
steep slopes in the south-central portion of the planning area and western region of the City
of La Quinta. Developments at the base of the Santa Rosa and Coral Reef Mountain slopes,
where bedrock is intensely fractured or jointed, are particularly vulnerable to seismically
induced rockfall. Manufactured slopes may also be subject to failure If not engineered to
resist seismic ground shaking.
However, the potential for instability exists in all hillside areas, and engineering geologic
investigations are recommended for development in these areas. Compliance with Uniform
Building Code standards, City zoning, building and grading codes, and the Land Use
Element of the La Quinta General .Plan would limit any potential impacts associated with
grading and construction to a less than significant level. No mitigation measures are
necessary.
Result in substantial soil erosion or the loss of topsoil?
Less Than Significant Impact. Potential development sites are generally vacant and on -site soils have
low erosion potential. Future developments anticipated by the draft Housing Element would involve the
removal of any unsuitable surface soils and the replacement of these soils with compacted fills. Future °
development sites are relatively flat and surface runoff would be channeled through on -site drainage
systems to City storm drains. Future development projects would be required to prepare erosion control
plans and/or incorporate Best Management Practices to minimize potential erosion and sedimentation
impacts into City storm drains. In addition, the future development sites would be improved with Hy
landscaping, which would reduce the potential for on -site erosion. No significant impacts would result
from the proposed project. No mitigation measures are necessary.
Be located on a geologic unit or soil that Is unstable, or that would become unstable as a result of
the project, and potentially result in on- or off -site landslide, lateral spreading, subsidence,
liquefaction or collapse?
Less Than Significant Impact. In the La Quinta area, the groundwater level and poorly consolidated
alluvial materials in the floodplain area and valley floor create areas susceptible to liquefaction.
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3 . Environmental A naly ris
According to the City's Environmental Hazards Element, applications for development within areas
located above potentially hazardous (i.e. liquefaction) soils will require, as appropriate, geotechnical
analyses and soil sampling to determine effective mitigation measures. Such geotechnical
recommendations may include measures that will have a significant influence upon the ultimate
configuration of a given project's land use plan. Also, the City's Hillside Conservation Zone precludes
intensive development on steep sloped and alluvial fan areas. Each development that occurs as
anticipated by the draft Housing Element would be considered on an individual basis to determine
geologic or soil instability if any. As part of the City's development review process, geotechnical studies
would be prepared to identify necessary improvements to ensure long-term geotechnical stability. No
mitigation measures are necessary.
Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994),
creating substantial risks to life or property?
Less Than Significant Impact. According to the Geologic Map in the Environmental Hazards Element of
the General Plan, areas containing deposits of ancient Lake Cahuilla and other large lakes up to 300 feet
in thickness, interbedded with fine-grained alluvial deposits, may be locally moderate to highly
expansive. These areas are located throughout the planning area, particularly in the southern portion of
the City. Each development that occurs as anticipated by the draft Housing Element would be
considered on an individual basis to determine the presence of expansive soil and if it would pose a
substantial risk to life or property. As part of the City's development review process, geotechnical
studies would be prepared to identify necessary improvements to ensure long-term geotechnical
stability. No mitigation measures are necessary.
Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater
disposal systems where sewers are not available for the disposal of wastewater?
No Impact. Future developments that occur in conjunction with the proposed project would utilize the
local sewer system. Therefore, no impacts would result from septic tanks or other on -site wastewater
disposal systems. No significant impacts would result from this project. No mitigation measures are
necessary.
3.7 HAZARDS AND HAZARDOUS MATERIALS
a) Create a significant hazard to the public or the environment through the routine transport, use
or disposal of hazardous materials?
No Impact. The draft Housing Element anticipates up to an additional 9,204 housing units, including
single-family residential and multi -family residential, for development through 2005. The development
would be located on vacant or underutilized land designated for residential use. In addition, no
significant amounts of hazardous materials would be transported, used or disposed of in conjunction
with the proposed project. Incidental amounts of hazardous materials could be used during construction
operations. Additionally, small quantities of household hazardous materials such as cleaning material
and solvents may be used in conjunction with the proposed development. No significant impacts are
anticipated as a result of the proposed project. No mitigation measures are necessary.
Create a significant hazard to the public or the environment through reasonable foreseeable upset
and accident conditions involving the release of hazardous materials into the environment?
No Impact. Future developments anticipated by the draft Housing Element may be located in the vicinity
of sites where hazardous materials are contained. Releases of hazardous materials may occur during a
natural disaster. Likewise, improperly stored containers of hazardous substances may overturn or break,
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3. Environmental Analysis
pipelines may rupture and storage tanks may fail. Compliance with federal, state, county and local
regulations on hazardous materials use, storage and disposal would minimize any risk of an accident.
The proposed development, by nature, would not create a significant hazard to the public or
environment. Through the City's environmental review process, future development projects would-be
evaluated for the potential release of hazardous materials into the environment. , No mitigation measures
are necessary.
Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or
waste within one -quarter mile of an existing or proposed school?
No Impact. The proposed project does not involve emissions or handling of hazardous materials,
substances or waste. Development anticipated by the Housing Element would not pose a hazard to
existing schools. No mitigation measures are necessary.
Be located on a site which is included on a list of hazardous materials sites compiled pursuant to
Government code Section 65962.5 and, as a result, would it create a significant hazard to the
public or the environment?
Less Than Significant Impact. Future developments anticipated by the Housing Element may be located
in the vicinity of sites listed on hazardous materials sites. Through the City's environmental review
process, it would be determined if a Phase 1 Study would be needed to determine if a potential
development site is on or within the immediate vicinity of any known hazardous material site. Where
appropriate, mitigation measures would be required to reduce potential hazards to the public to a level
that is less than significant.
For a project located within an airport land use plan or, where such a plan has not been adopted,
within two miles or a public airport or public use airport, would the project result in a safety hazard
for people residing or working in the project area?
Less Than Significant Impact. Currently, there are no airports located within the City's planning area,
therefore the proposed project would not result in any significant safety hazards from airport related
activity. No mitigation measures are necessary.
For a project within the vicinity of a private airstrip, would the project result In a safety hazard for
people residing or working in the project area?
Less Than Significant Impact. Currently, there are no airports located within the City's planning area,
therefore the proposed project would not result in any significant safety hazards from airport related.:
activity. No mitigation measures are necessary.
Impair implementation of or physically interfere with an adopted emergency response plan or
emergency evacuation plan?
No Impact. The proposed project would not conflict with the City of La Quinta' emergency response or
evacuation plans. Proposed development would be consistent with the City's Land Use and Traffic and
Circulation Elements of the General Plan. Without specific details regarding future developments, it is
impossible to determine conflict with an emergency response plan with any precision. Through the
City's environmental review process, each development would be evaluated regarding interference with
adopted emergency response. No significant impacts are anticipated as a result of the proposed
project. No mitigation measures are necessary.
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Expose people or structures. to a significant risk of loss, injury or death involving wildland fires,
including where wildlands are adjacent to urbanized areas or where residences are intermixed
with wildlands?
Less than Significant Impact. With its transition from predominantly rural to urban in nature, the main
threat and most responses in La Quinta involve brush and wildland fires. The City itself is outside a high
fire hazard area, but several areas adjacent to the city are in fire hazard areas. Due to the City's
proximity to such areas, the relatively low annual rainfall, and the occurrence of dry Santa Ana winds, the
City is considered to be in an area with a potential risk of fire. However, with intensifying urban uses, it is
anticipated that a shift from vegetation to urban -related types of fire should occur. Since much of the
vacant, developable planning area is interfaced with brush and/or wildland, there could be intermittent
fire danger throughout the planning area. However, between 1998 and 2005 the proposed development
would occur in a mostly developed urban area surrounded by residential uses. Any development that
occurs in conjunction with the proposed project would be designed to minimize fire risks. Suburban
fringe development in any wildland interface area would require a fire hazard reduction plan. No
significant impacts are anticipated as a result of the proposed project. No mitigation measures are
necessary.
3.8 HYDROLOGY AND WATER QUALITY
a) Violate any water quality standards or waste discharge requirements?
Less than Significant Impact. The draft Housing Element anticipates the development of 9,204 housing
units. As these units are developed, wastewater would be discharged into the focal sewer system and
on -site drainage would flow into the City's existing storm drain system. As part of Section 402 of the
Clean Water Act, the U.S. Environmental Protection Agency (EPA) has established regulations under the
National Pollution Discharge Elimination System (NPDES) program to control direct storm water
discharges. In California, the State Water Quality Control Board (WCQB) administers the NPDES
permitting program and is responsible for developing NPDES permitting requirements. The NPDES
program regulates industrial pollutant discharges, including construction activities. The City of La Quinta
is a co-permittee with the County National Pollution Discharge Elimination System (NPDES) permit.
Future development would be required to comply with the NPDES program. Additionally, through the
City's development review process, future development projects would be evaluated for potential water
quality impacts. Development projects would be required to prepare water quality plans and/or
.incorporate Best Management Practices into their construction operations to reduce potential water
quality impacts to a level that is less than significant. No mitigation measures are necessary.
Substantially deplete, groundwater supplies or interfere substantially with groundwater recharge,
such that there would be a net deficit in aquifer volume or a lowering of the local groundwater
table level (e.g., the production rate of pre-existing nearby wells would drop to a level which would
not support existing land uses or planned uses for which permits have been granted)?
Less Than Significant Impact. The Coachella Valley Water District (CVWD) predominantly provides water
service within the City. The CVWD obtains groundwater from the Whitewater River sub -basin, located
south and east of the City and covering 400 square miles. The City and planning area occur over the
Upper and Lower Thermal sub -areas, with the division occurring at Point Happy. The Aquifer in this area
occurs at depths of 300 to 600 feet, and is 500 to 1,000 feet thick. According to the Draft General
Plan/Master Environmental Assessment, the water table in the Lower Thermal area has risen in the past
several years, primarily due to the application of imported water from the Coachella Canal and a
reduction in pumpage, while the Upper Thermal's sub -area's water table has fallen. It appears that
increased urbanization may be causing the Lower Thermal sub -area to currently be in overdraft.
The Planning Center • Page 32 City of La Quinta Housing Element • August 2004
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3. Environmental Analysis
Through the City's environmental review process, future development would be evaluated for potential
impacts to groundwater supply and recharge on a regional basis as it is proposed. No mitigation
measures are necessary.
Substantially alter the existing drainage pattern of the site or area, including through the alteration
of the course of a stream or river, in a manner which would result in substantial erosion or siltation
on- or off -site?
Less Than Significant Impact. Erosion is not anticipated to be substantial during construction or
operation of developments anticipated by the City of La Quinta Housing Element. Each development .
project would be required to adhere to standard practices designed to prevent erosion and siltation
during the construction phase. Each development site would be connected to the City's storm drain.:_.
system and is not anticipated to create substantial erosion or siltation on- or off -site. No mitigation
measures are necessary.
Substantially alter the existing drainage pattern of the site or area, Including through the alteration
of the course of a stream or river, or substantially Increase the rate or amount of surface runoff in
a manner, which would result in flooding on- or off -site?
Less Than Significant Impact. The draft Housing Element anticipates development of 9,204 additional
housing units on vacant or underutilized land located throughout the City of La Quinta. It is anticipated
that many of the sites would involve slight changes to the existing on -site drainage network. However, all
developed sites would connect to the City's storm drain system and are not anticipated to generate
significant stormwater drainage impacts. The main watercourse in the area is the San Jacinto River.
Each development would be evaluated regarding drainage patterns and surface runoff on an individual
basis. No mitigation measures are necessary. C070
Create or contribute runoff water which would exceed the capacity of existing or planned r
stormwater drainage systems or provide substantial additional sources of polluted runoff?
Less Than Significant Impact. Development anticipated by the Housing Element involves developing
vacant or underutilized land. Since the sites anticipated for development are vacant or currently under
agricultural production, the construction of proposed housing would increase the amount of impervious
surface coverage. Therefore, the total volume of surface water runoff would be increased by the
proposed project, although sediment transport will decrease significantly. It is anticipated that existing
drainage systems will maintain their capacity to handle the potential residential development.
Each development would .have to be in compliance with the City and NPDES regulations regarding
stormwater pollution prevention measures in construction and operation would prevent adverse impacts:
on stormwater runoff. Further, runoff from additional urban uses would probably impact groundwater
quality less than the agricultural uses. In addition, each development would be evaluated on -an
individual basis regarding stormwater drainage. No significant impacts would result from the
development of this project. No mitigation measures are necessary.
Otherwise substantially degrade water quality?
Less Than Significant Impact. The Housing Element anticipates development of 9,204 housing units.
Although each project would be evaluated on an individual basis regarding degradation of water quality,
this project is not anticipated to substantially degrade water quality. No mitigation measures are
necessary.
City of La Quinta Housing Element • August 2004 The Planning Center v Page 33
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3. Environmental Analysis
Place housing within a 100-year flood hazard area as mapped on a federal Flood hazard Boundary
of Flood Insurance Rate Map or other flood hazard delineation map?
Less than Significant Impact. The General Plan Draft General Plan/Master Environmental Assessment
Flood Hazard Map identifies residential uses within the 100-year floodplain of the Whitewater River and in
areas adjacent to the La Quinta Evacuation Channel, Bear Creek Channel, East La Quinta Channel and
detention basins surrounding the Cove neighborhood. Therefore, some of the development proposed
by the Housing Element could be placed in the 1.00-year-flood zone. The City would only allow these
sites to be developed if the elevation is increased above the floodplain elevation level. These measures
include stipulations regarding land uses within the designated floodplain and floodway. Development is
prohibited within the floodway unless encroachments would not obstruct flows and would not result in
increased flood levels. Each development would be evaluated on an individual basis and would be
required to comply with uniform building codes and regulations. No mitigation measures are necessary.
Place within a 100-year flood hazard area structures, which would impede or redirect flood flows?
Less than Significant Impact. The General Plan Land Use Element identifies some residential uses in the
100-year floodplain of the Whitewater River, and in areas adjacent to the La Quinta Evacuation Channel,
Bear Creek Channel, East La Quinta Channel and detention basins surrounding the Cove neighborhood.
Therefore, some of the development proposed by the Housing Element could possibly be placed in the
100-year flood zone. Development in areas with flood hazards would be subject to floodplain
development guidelines to limit the personal and property damage that may occur due to flooding and
inundation. Furthermore, each development would be evaluated on an individual basis and would be
required to comply with uniform building codes and regulations. No mitigation measures are necessary.
Expose people or structures to a significant risk of loss, injury or death involving flooding,
including flooding as a result of the failure of a levee or dam?
Less than Significant Impact. The City of La Quinta is exposed to substantial 100-year flooding risk. In
addition to flooding that could occur in the i 00-year floodplains, FEMA has identified the potential for a
major breakout of the Whitewater River during a 100-year storm, at the bend in the Whitewater River
between Jefferson Street and Miles Avenue that could generate flooding impacts to residential areas in
the City of La Quinta. Levee improvements along the stormwater channel have decreased the chance of
breakout occurring. However, this event should be taken as a catastrophic "worst -case" scenario;
compliance with established building standards would reduce the risk of structural damage due to
flooding. Therefore, the risk from exposure of people and structures to flooding throughout the City is
considered less than significant. No mitigation measures are necessary.
Inundation by seiche, tsunami, or mudflow?
Less than Significant Impact. A seiche is a surface wave created when a body of water such as a lake or
reservoir is shaken, usually by earthquake activity. Seiches are of concern relative to water storage
facilities because inundation from a seiche can occur if the wave overflows a containment wall, such as
the wall of a reservoir, water storage tank, dam or other artificial body of water. A seiche in La Quinta
could occur during an earthquake, creating a potential for seiching for Lake Cahuilla and recharge
basins southeast of Lake Cahuilla. Flood control and reservoir facilities that experience seiching could
pose a threat to nearby development by failing and inundating developed lands with large volumes of
water. With respect to tsunami, the City of La Quinta and surrounding vicinity are too far from the Pacific
Ocean to be impacted by tsunami. A scenario for inundation by a mudflow is highly unlikely. Although it
is unlikely that anticipated development would be impacted by seiche, tsunami or mudflows, each
development would be evaluated on an individual basis. No mitigation measures are necessary.
The Planning Center • Page 34 City of La Quinta Housing Element *A ugust 2004
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3: Environmental Analysis
3.9 LAND USE AND PLANNING
a) Physically divide an established community?
Less Than Significant Impact. Development anticipated by the draft Housing Element would involve
development of vacant land. The proposed project would involve a change in land use from vacantor
currently developed land under agricultural production to residential urban uses, but would not
significantly divide any community or reduce access to community amenities. Project impacts are
therefore considered less than significant. No mitigation measures are necessary.
Conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over
the project (including, but not limited to the general plan, specific plan, local coastal program,.;or
zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect?,
No Impact. Development anticipated by the draft Housing Element would take place on lands currently
designated for residential use by the General Plan and zoned residential per the City's Zoning
Ordinance, therefore complying with all land use plans in the City of La Quinta. No mitigation measures
are necessary.
Conflict with any applicable habitat conservation plan or natural community conservation plan?
No Impact. Development anticipated by the draft Housing Element is located on land designated for
residential uses in developed urban/residential neighborhoods. No natural communities .or significant
•--- habitat areas currently exist on any future development sites. The proposed project would not conflict
with any habitat conservation plans or natural community conservation plans. No significant impacts ��
would result from project development. No mitigation measures are necessary.
3.10 MINERAL RESOURCES
a) Result in the loss of availability of a known mineral resource that would be a value to the
region and the residents ot the state?
Less than Significant Impact. The deep, fault -controlled Coachella Valley has been filled with eroded
materials from. surrounding hills and mountains. As a result, the mineral resources found within the
desert floor are largely limited to sand and gravel. However, future developments would be evaluated on
an individual basis and would be required to comply with the City's Natural Resources Element of the
General Plan. The Open Space/Conservation Element Implementation Program includes specific
standards and guidelines for evaluating the compatibility of development proposals adjacent to existing.
mining areas in the city and sphere of influence. No significant impacts are anticipated to result from
residential project development. No mitigation measures are necessary.
Result In the loss of availability of a locally important mineral resource recovery site delineated on
a local general plan, specific plan or other land use plan?
Less than Significant Impact. According to the State Mining and Geology board, large parts of the City
and planning area lie within MRZ -1 (Mineral Resource Zone), indicating the presence of little or no
mineral resources. The minerals in these zones are limited to sand and gravel. Currently, there are no
active mines currently in the City or planning area. The Natural Resources Element includes specific
standards and guidelines for evaluating the compatibility of development proposals adjacent to existing
mining areas in the city and sphere of influence. Compliance with this program would insure that no
significant impacts would result from the proposed Housing Element Update. No mitigation measures
are necessary.
City of La Quinta Housing Element • August 2004 The Planning Center • Page 3 5
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3. Environmental Analysis
3.11 NOISE
a) Exposure of persons to or generation of noise levels in excess of standards established In the
local general plan or noise ordinance, or applicable standards of other agencies?
Less Than Significant Impact. Noise impacts can be broken down into three categories. The first is
"audible" impacts, which refers to increases in noise level that are perceptible to humans. Audible
increases in noise levels generally refer to a change of three dBA or more since this level has been found
to be barely perceptible in exterior environments. The second category, "potentially audible," refers to a
change in noise level between one and three dBA. This range of noise levels was found to be noticeable
to sensitive people. in laboratory environments. The last category is changes in noise level of less than
one dBA that are typically "inaudible" to the human ear except under quiet conditions in controlled
environments. Only "audible" changes in noise level are considered as potentially significant.
Mobile -source noise (i.e., vehicles) is preempted from local regulation. For mobile sources, an impact
would be considered significant if the project were to increase noise by 3 dBA (a barely discernable
increase) and the resultant noise exceeded the City's noise standards, or 5 dBA (notable to most people)
if the resultant noise remained below City standards.
The proposed project site is located within the City of La Quinta and thus is subject to the City's General
Plan and Noise Ordinance incorporated therein. The General Plan discusses the effects of noise
exposure on the population and sets land -use compatibility goals aimed at protecting its residents from
undue noise. The Plan follows the recommendations set forth in Title 25 of the California Administrative
Code and discourages residential development in areas where exterior noise levels exceed 65 dBA
CNEL, unless measures are implemented to reduce noise levels to below this value.
The La Quinta Environmental Hazards Element contains the following residential noise level standards:
Land Use
Noise Standards'
Exterior
Residential — Noise Sensitive CNEL 50 dB CNEL 60 dB'
Other nonresidential CNEL 65dB CNEL 75 dB'
I. CNEL: Community Noise Equivalent Level.
Leq (12): The A -weighted equivalent sound level ave3raged over a 12-hour period (usually the hours of
operation).
2. Noise Standards with windows closed. Mechanical ventilation shah be provided per UBC requirements to
provide a habitable environment.
3. Indoor environment excluding bathrooms, toilets, closets and corridors.
4. Outdoor environment limited to rear yard of single-family homes, mull -family patios and balconies (with a
depth of 6' or more) and common recreation areas.
Noise Ordinance
The La Quinta Noise Ordinance establishes standards for maximum noise levels within residential areas
in the City. The exterior noise level standard is 60 dBA, and the interior noise level standard is 50 dBA.
The City realizes that the control of construction noise is difficult at best. It does however implement its
Land Use Compatibility Standards, which provide development standards for exterior noise levels across
the various land use categories.
The Planning Center • Page 36 City of La Quinta Housing Element • August 2004
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3. Environmental Analysis
State of California Standards
The California Office of Noise Control has set acceptable noise limits for sensitive uses. Sensitive -type
land uses, such as schools and homes, are "normally acceptable" in exterior noise environments up to
65 dBA CNEL and "conditionally acceptable" in areas up to 70 dBA CNEL. A "conditionally acceptable"
designation implies that new construction or development should be undertaken only after a detailed
analysis of the noise reduction requirements for each land use type is made and needed noise insulation
features are incorporated in the design. By comparison, a "normally acceptable" designation indicates
that standard construction can occur with no special noise reduction requirements.
The Housing Element proposes development of 9,204 housing units over the next five years. The
General Plan EIR asserts that future development shall comply with City, federal and state guidelines on
vehicle noise, roadway construction, occupational noise and noise abatement and insulation standards.
This would ensure that noise levels in La Quinta are maintained within acceptable standards that prevent
extensive disturbance, annoyance or disruption. In addition, each development would be evaluated on
an individual basis regarding generation of noise levels. No mitigation measures are necessary.
Exposure of persons to or generation of excessive groundborne vibration or groundborne noise
levels?
No Impact. The Housing Element anticipates development of 9,204 housing units through 2005.
Residential uses do not generate excessive groundbome vibration or groundborne noise; therefore no
excessive groundbome vibrations or noise would be created by the proposed project. No mitigation
measures are necessary. COO
A substantial permanent increase in ambient noise levels In the project vicinity above levels
existing without the project?
Less than Significant Impact. The Housing Element anticipates development of 9,204 housing units
through 2005. Traffic related to increased development would result in permanent increases in ambient
noise levels. However, depending on the size of each development, this increase may be notable for
some residents, but may not, however, significantly impact surrounding sensitive uses and may not
generate a substantial increase in ambient noise levels.
Without specific details regarding future developments, it is impossible to determine noise levels with
any precision. Future development proposed by the draft Housing Element would be in compliance with
the City's Land Use and Environmental Hazards Elements of the General Plan, as well as the CWs
Noise Ordinance. Future development shall comply with City, federal and state guidelines. This would
ensure that noise levels in La Quinta are maintained within acceptable standards. Additionally, through
the City's environmental review process, each development would be evaluated to determine whether
each project results in an increase in ambient noise levels. No mitigation measures are necessary.
A substantial temporary or periodic increase in ambient noise levels in the project vicinity above
levels existing without the project?
Less Than Significant Impact. Noise levels associated with construction activities would be higher than
the ambient noise levels in the project area today, but would subside once construction of the proposed
project is completed.
Two types of noise impacts could occur during the construction phase. First, the transport of workers
and equipment to the construction site would incrementally increase noise levels along site access
roadways. Even though there would be a relatively high single event noise exposure potential with
City of La Quinta Housing Element • Augutt 2004 The Planning Center • Page 37
PAClq-O? (WordPnfe<t)1F-xvirrmmentanlS NU.da-
3. Environmental Analysis
passing trucks (a maximum noise level of 86 dBA at 50 feet), the increase in noise would be less than
one dBA when averaged over a 24-hour period, and should therefore have a less than significant impact
at noise receptors along the truck routes.
The second type of impact is related to noise generated by on -site construction operations. Local
residents would be subject to elevated noise levels due to the operation of on -site construction
equipment. Construction activities are carried out in discrete steps, each of which has its own mix of
equipment, and consequently its own noise characteristics. Table 2 lists typical construction equipment
noise levels recommended for noise impact assessment at a distance of 50 feet.
Noise ranges have been found to be similar during all phases of construction, although the erection
phase tends to be less noisy. Noise levels range up to 89 dBA at 50 feet during the erection phase of
construction, which is approximately 2 dBA lower than other construction phases. The grading and site
preparation phase tends to create the highest noise levels, because the noisiest construction equipment
is found in the earthmoving equipment category. This category includes excavating machinery
(backfillers, bulldozers, draglines, front loaders, etc.) and earthmoving and compacting equipment
(compactors, scrapers, graders, etc). Typical operating cycles may involve one or two minutes of full
power operation followed by three to four minutes at lower power settings. Noise levels at 50 feet from
earthmoving equipment range from 73 to 96 dBA.
TABLE 2
1VV#QC LrV&LJ U&1V1:KA/to MY TYPICAL COMSTRUCTIOM
EQUIPMENT
Type of Equipment
Range of Sound Levels
Measured (dBA at 50 feet
Suggested Sound Levels for
Analysis dBA at 50 feet
Pile Drivers,12,000-18,000 ft-Ib/blow
81-96
93
Rock Drills
83-99
96
Jack Hammers
75-85
82
Pneumatic Tools
78-88
85
Pumps
68-80
77
Dozers
85-90
88
Tractor
77-82
80
Front -End Loaders
86-90
88
Hydraulic Backhoe
81-90
86
Hydraulic Excavators
81-90
86
Graders
79-89
86
Air Compressors
76-86
86
Trucks
81-87
86
Source: Noise Control for Buildinos and Manufacturing
Plants. BBN 1987_
Development anticipated by the draft Housing Element would be in compliance with the City's Land Use
and Environmental Hazards Elements of the General Plan. Future development shall comply with City,
state and federal noise standards and guidelines. This would ensure that noise levels in La Quinta are
maintained within acceptable standards. In addition, each development would be evaluated on an
individual basis to evaluate temporary increases in ambient noise levels. No mitigation measures are
necessary.
The Planning Center • Page 38 City of La Quinta Housing Element • August 2004
PAC14-02 (WordPerJat)lFtreirnnmentaAIS NU.dix
3 . Environmental Analysis
For a project located within an airport land use plan or, where such a plan has not been adopted,
within two miles of a public airport or public use airport, would the project expose people residing
or working in the project area to excessive noise levels?
No Impact. Currently, there are no public airports located within the City of La Quinta, therefore the
proposed project would not result in any exposure to excessive noise levels from airport related activity.
No mitigation measures are necessary.
For a project within the vicinity of a private airstrip, would the project expose people residing or
working in the project area to excessive noise levels?
Less than Significant Impact. Currently, there are no privately owned aviation facilities located within the
City of La Quinta, therefore the proposed project would not result in any exposure to excessive noise
levels from airport related activity. No mitigation measures are necessary.
3.12 POPULATION AND HOUSING
a) Induce substantial population growth in an area, either directly (for example, by proposing new
homes and businesses) or indirectly (for example, through extension of roads or other
Infrastructure)?
Less than Significant Impact. The City of La Quinta has an estimated population of 28,715 in 2001. The
City has experienced rapid population growth over the last 20 years, though this population growth has
occurred without a proportional increase in the number of housing units. The draft Housing Element
anticipates an up to an additional 9,204 housing units, including single-family residential and multifamily
residential, for development through 2005. The anticipated units are within the constraints set forth.in the
City.'s General Plan. Without specific details regarding future developments, it is impossible to evaluate
inducement of population growth. Through the City's environmental review process, future development
projects would be evaluated for potential growth inducing impacts. No mitigation measures are
necessary.
Displace substantial numbers of existing housing, necessitating the construction of replacement
housing elsewhere?
No Impact. Future developments anticipated by the draft Housing Element would be constructed
primarily on vacant or residentially -zoned land under current agricultural production in the City, therefore
no existing housing would be displaced. The proposed housing would be developed to meet the
population needs of the City. No significant impacts would occur as a result of the proposed project. No
mitigation measures are necessary.
Displace substantial numbers of people, necessitating the construction of replacement housing
elsewhere?
No Impact. Future developments anticipated by the draft Housing Element would be constructed on
vacant or underutilized land in the City, therefore no displacement of people or construction of
replacement housing would be necessary. No mitigation measures are necessary.
City of La Quinta Housing Element • August 2004 The Planning Center • Page 39
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3. Environmental Analysis
3.13 PUBLIC SERVICES
Would the project result in substantial adverse physical impacts associated with the provision of
new or physically altered governmental facilities, need for new or physically altered governmental
facilities, the construction of which could cause significant environmental Impacts, in order to
maintain acceptable service ratios, response times or other performance objectives for any of the
public services:
a) Fire protection?
Less than Significant Impact. The City of La Quinta currently contracts for its fire services with the
Riverside County Fire Department and the California Department of Forestry and Fire Protection. The
planning areas are served by six fire stations with overlapping coverage areas. Fire stations located
within the. City of La Quinta are Station #70, Station #32, Station #31, and Station #39. Stations located
in adjacent cities, but servicing limited portions of the City, are Stations #88, in the City of Indio, and
Station #55, in the City of Indian Wells.
The draft Housing Element anticipates development of up to an additional 9,204 housing units, including
single -'family residential and multi -family residential, for development through 2005. New housing
developments may increase the need for additional fire protection in the City, and may require the need
for improvements to existing facilities or increases in staffing and equipment. Housing growth is
consistent with the existing General Plan and the City has planned to increase services as the city grows;
therefore there is no significant impact. No mitigation measures are necessary.
Police protection?
Less than Significant Impact. The•City of La Quinta contracts with the Riverside County Sheriff's
Department for law enforcement services within the City limits. The draft Housing Element anticipates
development of up to an additional 9,204 housing units, including single-family residential and multi-
family residential, for development through 2005. New housing developments may increase the need for
additional police protection in the City, and may require the need for improvements to existing facilities
or increases in staffing and equipment. Housing growth is consistent with the existing General Plan and
the City has planned to increase services as the city grows; therefore there is no significant impact. No
mitigation measures are necessary.
Schools?
Less than Significant Impact. The Desert Sands Unified School District (DSUSD) and the Coachella
Valley Unified School District (CVUSD) serve the City's student population. The DSUSD operates five
schools, including 3 elementary schools, one high school, and one middle school, providing service to
about 5,800 students. The CVUSD operates three schools, including 2 schools that serve students in
kindergarten through eighth grade and one high school, providing service to approximately 5,440
students.
The draft Housing Element anticipates up to an additional 9,204 housing units, including single-family
residential and multi -family residential, for development through 2005. Development of additional
housing would induce population growth, therefore increasing the demand on schools. Additional
facilities and staffing may be necessary to accommodate the growth. Pursuant to Government Code
Section 65995(h), the payment of established school fees "are hereby deemed to be full and complete
mitigation of the impacts of any legislative or adjudicative act, or both, involving, but not limited to, the
planning, use, or development of real property..." Mitigation beyond these fees cannot be required and
any subsequent housing projects cannot be denied approval for refusal of payments beyond these fees.
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P: \Cty-02 (R','ardPerfect)1Fuvii-anmetif iAIS_NU.dix
3. Environmental Analysis
Hence, the potential impact on school facilities is not considered significant and no mitigation measures
are necessary.
Parks?
Less than Significant Impact. La Quinta's park system is expanding as,new development occurs in the
City's planning area. Because the City's population is rapidly increasing, enhancement and expansion
of the City's park system is required to keep pace with demand. The draft Housing Element anticipates
up to an additional 9,204 housing units, including single-family residential and multi -family residential, for
development through 2005. Housing growth is. consistent with the existing General Plan and the City
has planned to increase services as the city grows; therefore there is no significant impact. No
mitigation measures are necessary.
Other public facilities?
No Impact. Development anticipated by the Housing Element would be evaluated on an individual basis
regarding impacts to other public facilities. No significant impacts would result from this project. No
mitigation measures are necessary.
3.14 RECREATION
a) Would the project increase the use of existing neighborhood and regional parks or other
recreational facilities, such that substantial physical deterioration of the facility would occur or
be accelerated?
Less Than Significant Impact. There are ten parks and recreation facilities within the City of La Quinta, as
well as public playgrounds on school district sites, seven proposed parks and recreation facilities
(including 2 parks and facilities proposed by the Coachella Valley Recreation and Park District), and a
senior citizen center. Additional developments anticipated by the draft Housing Element are not
expected to decrease the parkland to population ratio. Additional parkland and facilities would likely be
constructed to accommodate new residential developments and the resulting population growth.
Housing growth is consistent with the existing General Plan and the City has planned to increase
services as the city grows. Where needed, appropriated mitigation measures would be required to
reduce potential impacts to a level that is less than significant. No mitigation measures are necessary.
Does the project include recreational facilities or require the construction or expansion of
recreational facilities, which might have an adverse physical effect on the environment?
Less Than Significant Impact. New development anticipated by the draft Housing Element would
Increase the demand for parks and recreation facilities in the City. Housing growth is consistent with the
existing General Plan and the City has planned to increase services as the city grows. Where needed,
appropriate mitigation measures would be required to reduce potential impacts to a level that is less than
significant. No mitigation measures are required.
3.15 TRANSPORTATION/TRAFFIC
a) Cause an increase in traffic, which is 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)?
Less than Significant Impact. The draft Housing Element anticipates development of up to an additional
9,204 housing units. The additional development and associated traffic volumes are included in the
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3 . Environmental Analysis
future traffic projections in the City's Circulation Element.. With the incorporation of recommended traffic
improvements, future traffic volumes would operate at acceptable levels of service. Through the City's
environmental review process, future development projects would be evaluated for potential traffic
impacts. Where needed, appropriate mitigation measures would be required to reduce potential traffic
impacts to a level that is less than significant. No mitigation measures are necessary.
Exceed, either Individually or cumulatively, a level of service standard established by the county
congestion management agency for designated roads or highways?
Less than Significant Impact. The City's Traffic and Circulation Element establishes a standard for a
Level of Service (LOS) LOS E or better for signalized intersections in the City; the City considers LOS "A"
through "E" as acceptable, and LOS "F" or worse as unacceptable. Because development anticipated
by the draft Housing Element is in compliance with the City's build -out estimates specified in the General
Plan, additional development is not'likely to contribute significantly to local traffic impacts, although it
could contribute to cumulative region -wide traffic impacts. Traffic generated by anticipated development
would, however, not likely be mitigated through ongoing and future highway improvements. Through the
City's environmental review process, future development projects would be evaluated for potential traffic
impacts. Where needed, appropriate mitigation measures would be required to reduce potential traffic
impacts to a level that is less than significant. No mitigation measures are necessary.
Result in a change in air traffic patterns, including either an increase in traffic levels or a change in
location that results in substantial safety risks?
Less than Significant Impact. Development anticipated by the draft Housing Element involves the
development of 9,204 housing units on vacant or residentially -zoned land under current agricultural
production throughout the City. The anticipated amount of development would not result in any changes
to air traffic patterns. Nor would the anticipated amount of development result in any substantial safety
risks related to aircraft traffic. Through the City's environmental review process, future development
would be evaluated for compliance with the Land Use Element. No mitigation measures are necessary.
Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous
Intersections) or incompatible uses (e.g., farm equipment)?
Less Than Significant Impact. The draft Housing Element anticipates the development of 9,204 housing
units through 2005. Any needed traffic improvements associated with the anticipated development
would be constructed to City's roadway safety standards: The increased amount of traffic associated
with the anticipated development would not substantially increase hazards to motorist, pedestrians or
bicyclists. Through the City's environmental review process, future development projects would be
evaluated for potential safety impacts: Where needed, appropriate mitigation measures would be
required to reduce potential impacts to a level that is less than significant. No mitigation measures are
necessary.
Result in inadequate emergency access?
No Impact. The draft Housing Element anticipates the development of 9,204 housing units through
2005. The proposed project would be required to conform to traffic and safety regulations, including the
Traffic and Circulation Element of the General Plan, that specifies adequate emergency access
measures. Because adequate emergency access is impossible to determine with any precision without
specific details regarding each development, future development would be evaluated to determine - --
adequacy of emergency access. No significant impacts are anticipated as a result of the proposed
project. No mitigation measures are necessary.
The Planning Center • Page 42 City of La Quinta Housing Element *A ugust 2004
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3. Environmental Analysis
Result in inadequate parking capacity?
Less than Significant Impact. Development anticipated by the draft Housing Element involves the
development of residential dwelling units. Each development would be required to satisfy minimum City
parking standards. Future development would be evaluated to determine adequacy of parking. No
mitigation measures are necessary.
Conflict with adopted policies, plans, or programs supporting alternative transportation (e.g., bus
turnouts, bicycle racks)?
Less than Significant Impact. The City of La Quinta contains access to several forms of alternative
transportation including buses and bicycle paths. The Housing Element anticipates development of
9,204 additional housing units. Alterative modes of transportation would continue to be made available.
The proposed development would not be in conflict with adopted policies, plans or programs that
support alternative transportation. No mitigation measures are necessary.
3.16 UTILITIES AND SERVICE SYSTEMS
a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control
Board?
Less than Significant Impact. The Coachella Valley Water District (CVWD) predominantly provides water
service within the La Quinta area. The draft Housing Element anticipates up to an additional 9,204
housing units, including single-family residential and multifamily residential, for development through
2005. The General Plan/Master Environmental Assessment indicates that current facilities are under
capacity and the CVWD is continuously increasing the capacity of all wastewater treatment plants.
Therefore, it is anticipated that CVWD sewer treatment facilities will be adequate to accommodate the
build -out development of the General Plan and thus, accommodate proposed development through the
2005 Housing Element planning period. Housing growth is consistent with the existing General Plan and
the City has planned to expand services as necessary. Where needed, appropriate mitigation measures
would be required to reduce potential impacts to a level that is less than significant. No mitigation
measures are necessary.
Require or result in the construction of new water or wastewater treatment facilities or expansion
of existing facilities, the construction of which could cause significant environmental effects?
Less Than Significant Impact. Water supply in the City is derived from municipally. operated groundwater
wells and imported water from the Coachella Valley Water District (CVWD). Increased water
consumption would result in a higher demand for water resources. Independent of future housing
development associated with the draft Housing Element, the CVWD expects to double the capacity of
the Avenue 38 wastewater treatment plant within the next two years and the Mid -Valley Reclamation Plan
is expected to increase by approximately 20% during the same time period, according to the Draft
General Plan/Master Environmental Assessment 2001. The draft Housing Element anticipates up to an
additional 9,204 housing units, including single-family residential and multi -family residential, for
development through 2005. Expansion or new construction of any facility will be subject to the City's
environmental review process and would be evaluated for potential environmental impacts. Housing
growth is consistent with the existing General Plan and the City has planned to expand services as
necessary. No mitigation measures are necessary.
City of La Quinta Housing Element • August 2004 The Planning Center *Page 43
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3. Environmental Analysis
Require or result in the construction of new storm water drainage facilities or expansion of
existing facilities, the construction of which could cause significant environmental effects?
Less than Significant Impact. CVWD operates and maintains regional stormwater management facilities
within the City of La Quinta. Storm drainage is provided through reinforced concrete pipes and open
channels throughout the City. The City maintains an NPDES co -permit with Riverside County for storm
drain facilities serving La Quinta. Existing storm drain lines would be utilized by future developments
proposed by the draft Housing Element. New development may occur in areas identified with deficient
storm drainage and could exacerbate existing flooding problems. Housing growth is consistent with the
existing General Plan and the City has planned to expand services as necessary. No mitigation
measures are necessary.
Have sufficient water supplies available to serve the project from existing entitlements. and
resources, or are new or expanded entitlements needed?
Less Than Significant Impact. The City purchases most of its water from the Coachella Valley Water
District. The increase in water consumption that may occur with new development anticipated by the
draft Housing Element would not result in significant impacts to imported water supplies. The General
Plan EIR specifies that future development would be required to comply with water conservation
requirements set forth in Title 24 of the California Code of Regulations and City's Municipal Code.
Housing growth is consistent with the existing General Plan and the City has planned to expand services
as necessary. No mitigation measures are necessary.
Result In a determination by the wastewater treatment provider, which serves or may serve the
project that it has adequate capacity to serve the project's projected demand in addition to the
provider's existing commitments?
Less than Significant Impact. Development anticipated by the draft Housing Element includes 9,204
additional units throughout the City. Housing growth is consistent with the existing General Plan and the
City has planned to expand services as necessary. Where needed, appropriate mitigation measures
would be required to reduce potential impacts to a level that is less than significant. No mitigation
measures are necessary.
Be served by a landfill with sufficient permitted capacity to accommodate the project's solid waste
disposal needs?
Less than Significant Impact. Solid waste disposal is provided to the City of La Quinta through a contract
with Waste Management of the Desert, which currently uses landfills as the primary depository for waste
disposal. Solid waste generated in La Quinta is transported to one of the two landfills that serve the City;
they are Edom Hill Landfill and Mecca Landfill. According to the Public Utility section of the General
Plan/Master Environmental Assessment, the Edom Hill Landfill is nearing capacity with closure of the
landfill projected for 2004. The Mecca Landfill's projected closure date is 2011, with the date subject to
change based future levels of waste generation and demands for landfill space.
Additional development anticipated by the draft Housing Element would increase the generation of solid
waste. Future development would be required to contract individually with disposal companies serving
the City. Housing growth is consistent with the existing General Plan and the City has planned to
expand services as necessary. Where needed, appropriate mitigation measures would be required to
reduce potential impacts to a level that is less than significant. No mitigation measures are necessary.
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3. Environmental Analysis
Comply with federal, state, and local statutes and regulations related to solid waste?
Less than Significant Impact. The developments anticipated by the draft Housing Element include 9,204
additional units throughout the City. Although there would be increased generation of solid waste due to
the proposed project, it is impossible to determine specific generation rates with any precision without
specific details regarding future development. Housing growth is consistent with the existing General
Plan and the City has planned to expand services as necessary. Where needed, appropriate mitigation
measures would be required to reduce potential impacts to a level that is less than significant. No
mitigation measures are necessary.
3.17 MANDATORY FINDINGS OF SIGNIFICANCE
a) Does the project have the potential to degrade the quality of the environment, substantially
reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below
self-sustaining levels, threaten to eliminate a plant or animal community, reduce the number or
restrict the range of a rare or endangered plant or animal or eliminate important examples of
the major periods of California history or prehistory?
No Impact. The proposed project is the City of La Quinta Housing Element update, a policy document
covering demographic issues and local housing needs in the City of La Quinta, which has a growing
urban character. No significant biological or historical impacts are anticipated to result from
implementation of the proposed 'project. No mitigation measures are necessary.
Does the project have impacts that are individually limited, but cumulatively considerable?.
("Cumulatively considerable" means that the incremental effects of a project are considerable
when viewed in connection with the effects of past projects, the effects of other current projects,
and the effects of probable future projects.)
Less than Significant Impact. The proposed project involves the implementation of the Housing Element
for the City of La Quinta. The Housing Element is a policy document designed to assist the City in future
planning. Although the Housing Element proposes development of 9,204 housing units within the City,
all units would not necessarily be constructed. Through the City's environmental review process, future
development projects would be evaluated for potential cumulative impacts. Where needed, appropriate
mitigation measures would be required to reduce potential impacts to a level that is. less than significant.
No mitigation measures are necessary.
Does the project have environmental effects, which will cause substantial adverse effects on
human beings, either directly or indirectly?
Less than Significant Impact. The General Plan involves the implementation of the Housing Element for
the City of La Quinta. The Housing Element is a policy document designed to assist the City in future
planning for the development of housing in the City. Although the Housing Element proposes
development of 9,204 housing units within the City, all units would not necessarily be constructed.
Through the City's environmental review process, future development projects would be evaluated for
potential direct and indirect impacts on human beings. Where needed, appropriate mitigation measures
would be required to reduce potential impacts to a level that is less than significant. No mitigation
measures are necessary.
City of La Quinta Housing Element • August 2004 The Planning Center *Page 45
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3. Environmental Analysis
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Appendix
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Appendix
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