Appendix D - Noise Impact StudyTroutdale Village Apartments Project- Noise
Noise Impact Study
City of La Qu i nta, CA
Prepared for:
Rich Malacoff
The Altum Group
72140 Magnesia Falls, Suite 1
Rancho Mirage, CA 92270
Prepared by:
MD Acoustics, LLC
Francisco Irarrazabal
1197 Los Angeles Ave, Ste C-256
Simi Valley, CA 93065
Date: 1/12/2022
ACOUSTICS
Sound Solutions for Planning and Design
Noise Study Reports I Vibration Studies I Air Quality I Greenhouse Gas I Health Risk Assessments
Troutdale Village Apartments project- Noise
Noise Impact Study
City of La Quinta, CA Table of Contents
TABLE OF CONTENTS
1.0
Introduction.................................................................................................................................... 1
1.1 Purpose of Analysis and Study Objectives
1
1.2 Site Location and Study Area
1
1.3 Proposed Project Description
1
2.0
Fundamentals of Noise...................................................................................................................
4
2.1 Sound, Noise and Acoustics
4
2.2 Frequency and Hertz
4
2.3 Sound Pressure Levels and Decibels
4
2.4 Addition of Decibels
4
2.5 Human Response to Changes in Noise Levels
5
2.6 Noise Descriptors
5
2.7 Traffic Noise Prediction
6
2.8 Sound Propagation
7
3.0
Ground -Borne Vibration Fundamentals.........................................................................................
8
3.1 Vibration Descriptors
8
3.2 Vibration Perception
8
3.3 Vibration Perception
8
4.0
Regulatory Setting.........................................................................................................................
10
4.1 Federal Regulations
10
4.2 State Regulations
10
4.3 City of La Quinta Noise Regulations
12
5.0
Study Method and Procedure.......................................................................................................
17
5.1 Noise Measurement Procedure and Criteria
17
5.2 Noise Measurement Locations
17
5.3 FHWA Traffic Noise Prediction Model
17
5.4 FHWA Roadway Construction Noise Model
19
6.0 Existing Noise Environment.......................................................................................................... 21
6.1 Short -Term Noise Measurement Results 21
7.0 Future Noise Environment Impacts and Mitigation..................................................................... 22
7.1 Future Exterior Noise 22
7.1.1 Noise Impacts to Off -Site Receptors Due to Project Generated
Traffic 22
7.1.2 Noise Impacts to On -Site Receptors Due to Traffic 22
7.1.3 Noise Impacts to Off -Site Receptors Due to Operational Traffic 23
7.2 Summary of Recommendations 23
8.0 Construction Noise Impact........................................................................................................... 24
8.1 Construction Noise 24
8.2 Construction Vibration 25
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Troutdale Village Apartments Project- Noise
Noise Impact Study
Citv of La Quinta. CA Table of Contents
8.3 Construction Noise Reduction Measures 26
9.0 References.................................................................................................................................... 27
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Troutdale Village Apartments project- Noise
Noise Impact Study
City of La Quinta, CA Table of Contents
LIST OF APPENDICES
Appendix A: Field Measurement Data................................................................................................... 1
Appendix B: Traffic FHWA Worksheets.................................................................................................. 2
Appendix C: Construction Noise Modeling Output................................................................................ 3
LIST OF EXHIBITS
ExhibitA: Location Map..................................................................................................................... 2
ExhibitB: Site Plan.............................................................................................................................. 3
Exhibit C: Typical A -Weighted Noise Levels....................................................................................... 4
Exhibit D: Land Use Compatibility Guidelines.................................................................................. 11
Exhibit E: Measurement Locations.................................................................................................. 20
LIST OF TABLES
Table 1: Land Use Compatibility for Community Noise Environments.................................................... 14
Table 2: Exterior Noise Standards............................................................................................................. 15
Table 3: Roadway Parameters and Vehicle Distribution.......................................................................... 18
Table 4: Short -Term Nosie Measurement Data (dBA)1............................................................................ 21
Table 5: Existing Scenario - Noise Levels Along Roadways (dBA CNEL).................................................... 23
Table 6: Typical Construction Noise Levels' ............................................................................................. 24
Table 7: Guideline Vibration Damage Potential Threshold Criteria......................................................... 25
Table 8: Vibration Source Levels for Construction Equipment'............................................................... 26
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Introduction
1.0 Introduction
1.1 Purpose of Analysis and Study Objectives
This noise assessment was prepared to evaluate the potential noise impacts for the project study area
and to recommend noise mitigation measures, if necessary, to minimize the potential noise impacts. The
assessment was conducted and compared to the noise standards set forth by the Federal, State and
Local agencies. Consistent with the City's Noise Guidelines, the project must demonstrate compliance to
the applicable noise criterion as outlined within the City's Noise Element and Municipal Code.
The following is provided in this report:
• A description of the study area and the proposed project
• Information regarding the fundamentals of noise
• A description of the local noise guidelines and standards
• An analysis of traffic noise impacts to and from the project site
• An analysis of construction noise impacts
1.2 Site Location and Study Area
The project site is located at the northeast corner of Washington Street and Avenue 50 intersection in
La Quinta, California, as shown in Exhibit A. The site is currently zoned as medium/high density
residential use with vacant residential use to the south and north, low density residential to the west,
and open space to the east.
1.3 Proposed Project Description
The Project proposes a high/medium residential -use development consisting of 284 units, on 13.84
acres. As a worst-case scenario, this assessment assumes the project is built -out in one (1) complete
phase. Construction activities within the Project area will consist of on-site grading, building, paving, and
architectural coating.
This study assesses both the traffic and short-term stationary noise to and from the project site and
compares the results to the applicable City noise limits. The primary source of traffic noise propagates
from Washington Street. The primary source of short-term stationary noise propagates from
construction equipment to be deployed in the area for construction activities. The site plan used for this
is illustrated in Exhibit B.
Troutdale Village Apartments Project — Noise
Noise Impact Study
City of La Quinta, CA Introduction
Exhibit A
Location Map
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Avenue 50 r, r
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2
Troutdale Village Apartments Project — Noise
Noise Impact Study
City of La Quinta, CA Introduction
F-
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Exhibit B
Site Plan
ISI PA gRWOIN PARE NER s
AVENUE 50
a�D Site Plan
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La Quinta Apartments Site Plan
Parker Development NW Al
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La Q—W. CelilOmia 92253 PROJECT NO: 21014
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Fundamentals of Noise
2.0 Fundamentals of Noise
This section of the report provides basic information about noise and presents some of the terms used
within the report.
2.1 Sound, Noise and Acoustics
Sound is a disturbance created by a moving or vibrating source and is capable of being detected by the
hearing organs. Sound may be thought of as mechanical energy of a moving object transmitted by
pressure waves through a medium to a human ear. For traffic, or stationary noise, the medium of
concern is air. Noise is defined as sound that is loud, unpleasant, unexpected, or unwanted.
2.2 Frequency and Hertz Exhibit C: Typical A -Weighted Noise Levels
A continuous sound is described by its frequency
(pitch) and its amplitude (loudness). Frequency
relates to the number of pressure oscillations per
second. Low -frequency sounds are low in pitch (bass
sounding) and high -frequency sounds are high in
pitch (squeak). These oscillations per second (cycles)
are commonly referred to as Hertz (Hz). The human
ear can hear from the bass pitch starting out at 20 Hz
all the way to the high pitch of 20,000 Hz.
2.3 Sound Pressure Levels and Decibels
The amplitude of a sound determines it loudness.
The loudness of sound increases or decreases as the
amplitude increases or decreases. Sound pressure
amplitude is measure in units of micro -Newton per
square inch meter (N/m2), also called micro -Pascal
(µPa). One µPa is approximately one hundred
billionths (0.00000000001) of normal atmospheric
pressure. Sound pressure level (SPL or Lp) is used to
describe in logarithmic units the ratio of actual
sound ressures to a reference ressure s uared
TYPICAL SOUND LEVELS FROM
INDOORAND OUTDOOR NOISE SOURCES
COMMON OUTDOOR
NOISE LEVEL
COMMON INDOOR
NOISE LEVELS
(dBA)
NOISE LEVELS
110
Rock Band
Jet Flyover at 1000 ft.
100
Inside Subway Tfain (Nev, York)
Gas Lown Mower at 3 IL
BO
Diesel Truck at 50 it.
Food Blender at 3 ft.
Norse Urban Daytime
Garbage Disposal at 3 ft.
90
Shouting at 3 ft.
Gas Lawn Mower at 100 fL
Vacuum Cleaner at 10 ft.
70
Commemial Area
Normal Speeeb at 3 ft.
Heavy Traffic at 300 ft
60
Large Business Office
Dishwasher Next Room
Quiet Urban Daytime
Small Theatre. Large Conference
Quiet Urban Nighttime
40
Room (Background)
Quiet Suburban Nighttime
30
Library
Bedmom at Night
Quiet Rural Nighttime
Concert Holl (Background)
20
Recording Studio
10
Threshold of Hearing
a
p p q
These units are called decibels abbreviated dB. Exhibit C illustrates references sound levels for different
noise sources.
2.4 Addition of Decibels
Because decibels are on a logarithmic scale, sound pressure levels cannot be added or subtracted by
simple plus or minus addition. When two sounds or equal SPL are combined, they will produce an SPL 3
dB greater than the original single SPL. In other words, sound energy must be doubled to produce a 3 dB
increase. If two sounds differ by approximately 10 dB, the higher sound level is the predominant sound.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Fundamentals of Noise
2.5 Human Response to Changes in Noise Levels
In general, the healthy human ear is most sensitive to sounds between 1,000 Hz and 5,000 Hz, (A -
weighted scale) and it perceives a sound within that range as being more intense than a sound with a
higher or lower frequency with the same magnitude. For purposes of this report as well as with most
environmental documents, the A -scale weighting is typically reported in terms of A -weighted decibel
(dBA). Typically, the human ear can barely perceive the change in noise level of 3 dB. A change in 5 dB
is readily perceptible, and a change in 10 dB is perceived as being twice or half as loud. As previously
discussed, a doubling of sound energy results in a 3 dB increase in sound, which means that a doubling
of sound energy (e.g. doubling the volume of traffic on a highway) would result in a barely perceptible
change in sound level.
Changes in Intensity Level,
dBA
Changes in Apparent
Loudness
1
Not perceptible
3
Just perceptible
5
Clearly noticeable
10
Twice (or half) as loud
https://www.fhwa. dot.gov/envi ronMent/noise/regulations_a nd_gui dance/polgu ide/polgu ide02.cfm
2.6 Noise Descriptors
Noise in our daily environment fluctuates over time. Some noise levels occur in regular patterns, others
are random. Some noise levels are constant while others are sporadic. Noise descriptors were created
to describe the different time -varying noise levels.
A -Weighted Sound Level: The sound pressure level in decibels as measured on a sound level meter using
the A -weighted filter network. The A -weighting filter de-emphasizes the very low and very high frequency
components of the sound in a manner similar to the response of the human ear. A numerical method of
rating human judgment of loudness.
Ambient Noise Level: The composite of noise from all sources, near and far. In this context, the ambient
noise level constitutes the normal or existing level of environmental noise at a given location.
Community Noise Equivalent Level (CNEL): The average equivalent A -weighted sound level during a 24-
hour day, obtained after addition of five (5) decibels to sound levels in the evening from 7:00 to 10:00 PM
and after addition of ten (10) decibels to sound levels in the night before 7:00 AM and after 10:00 PM.
Decibel (dB): A unit for measuring the amplitude of a sound, equal to 20 times the logarithm to the base
10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micro -pascals.
d8 A : A -weighted sound level (see definition above).
Equivalent Sound Level aggk The sound level corresponding to a steady noise level over a given sample
period with the same amount of acoustic energy as the actual time varying noise level. The energy average
noise level during the sample period.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Fundamentals of Noise
Habitable Room: Any room meeting the requirements of the Uniform Building Code or other applicable
regulations which is intended to be used for sleeping, living, cooking or dining purposes, excluding such
enclosed spaces as closets, pantries, bath or toilet rooms, service rooms, connecting corridors, laundries,
unfinished attics, foyers, storage spaces, cellars, utility rooms and similar spaces.
L(n : The A -weighted sound level exceeded during a certain percentage of the sample time. For example,
L10 in the sound level exceeded 10 percent of the sample time. Similarly L50, L90 and L99, etc.
Noise: Any unwanted sound or sound which is undesirable because it interferes with speech and hearing,
or is intense enough to damage hearing, or is otherwise annoying. The State Noise Control Act defines
noise as "...excessive undesirable sound...".
Outdoor Living Area: Outdoor spaces that are associated with residential land uses typically used for
passive recreational activities or other noise -sensitive uses. Such spaces include patio areas, barbecue
areas, jacuzzi areas, etc. associated with residential uses; outdoor patient recovery or resting areas
associated with hospitals, convalescent hospitals, or rest homes; outdoor areas associated with places of
worship which have a significant role in services or other noise -sensitive activities; and outdoor school
facilities routinely used for educational purposes which may be adversely impacted by noise. Outdoor
areas usually not included in this definition are: front yard areas, driveways, greenbelts, maintenance
areas and storage areas associated with residential land uses; exterior areas at hospitals that are not used
for patient activities; outdoor areas associated with places of worship and principally used for short-term
social gatherings; and, outdoor areas associated with school facilities that are not typically associated with
educational uses prone to adverse noise impacts (for example, school play yard areas).
Percent Noise Levels: See L(n).
Sound Level (Noise Level): The weighted sound pressure level obtained by use of a sound level meter
having a standard frequency -filter for attenuating part of the sound spectrum.
Sound Level Meter: An instrument, including a microphone, an amplifier, an output meter, and frequency
weighting networks for the measurement and determination of noise and sound levels.
Single Event Noise Exposure Level (SENEL): The dB(A) level which, if it lasted for one second, would
produce the same A -weighted sound energy as the actual event.
2.7 Traffic Noise Prediction
Noise levels associated with traffic depends on a variety of factors: (1) volume of traffic, (2) speed of
traffic, (3) auto, medium truck (2-3 axle) and heavy truck percentage (4 axle and greater), and sound
propagation. The greater the volume of traffic, higher speeds and truck percentages equate to a louder
volume in noise. A doubling of the Average Daily Traffic (ADT) along a roadway will increase noise levels
by approximately 3 dB; reasons for this are discussed in the sections above.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Fundamentals of Noise
2.8 Sound Propagation
As sound propagates from a source it spreads geometrically. Sound from a small, localized source (i.e., a
point source) radiates uniformly outward as it travels away from the source in a spherical pattern. The
sound level attenuates at a rate of 6 dB per doubling of distance. The movement of vehicles down a
roadway makes the source of the sound appear to propagate from a line (i.e., line source) rather than a
point source. This line source results in the noise propagating from a roadway in a cylindrical spreading
versus a spherical spreading that results from a point source. The sound level attenuates for a line source
at a rate of 3 dB per doubling of distance.
As noise propagates from the source, it is affected by the ground and atmosphere. Noise models use
hard site (reflective surfaces) and soft site (absorptive surfaces) to help calculate predicted noise levels.
Hard site conditions assume no excessive ground absorption between the noise source and the receiver.
Soft site conditions such as grass, soft dirt or landscaping attenuate noise at a rate of 1.5 dB per doubling
of distance. When added to the geometric spreading, the excess ground attenuation results in an overall
noise attenuation of 4.5 dB per doubling of distance for a line source and 7.5 dB per doubling of distance
for a point source.
Research has demonstrated that atmospheric conditions can have a significant effect on noise levels
when noise receivers are located 200 feet from a noise source. Wind, temperature, air humidity and
turbulence can further impact have far sound can travel.
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Ground -Borne Vibration Fundamentals
3.0 Ground -Borne Vibration Fundamentals
3.1 Vibration Descriptors
Ground -borne vibrations consist of rapidly fluctuating motions within the ground that have an average
motion of zero. The effects of ground -borne vibrations typically only cause a nuisance to people, but at
extreme vibration levels, damage to buildings may occur. Although ground -borne vibration can be felt
outdoors, it is typically only an annoyance to people indoors where the associated effects of the shaking
of a building can be notable. Ground -borne noise is an effect of ground -borne vibration and only exists
indoors, since it is produced from noise radiated from the motion of the walls and floors of a room and
may also consist of the rattling of windows or dishes on shelves.
Several different methods are used to quantify vibration amplitude.
PPV— Known as the peak particle velocity (PPV) which is the maximum instantaneous peak in vibration
velocity, typically given in inches per second.
RMS — Known as root mean squared (RMS) can be used to denote vibration amplitude
VdB — A commonly used abbreviation to describe the vibration level (VdB) for a vibration source.
3.2 Vibration Perception
Typically, developed areas are continuously affected by vibration velocities of 50 VdB or lower. These
continuous vibrations are not noticeable to humans whose threshold of perception is around 65 VdB.
Outdoor sources that may produce perceptible vibrations are usually caused by construction equipment,
steel -wheeled trains, and traffic on rough roads, while smooth roads rarely produce perceptible ground -
borne noise or vibration. To counter the effects of ground -borne vibration, the Federal Transit
Administration (FTA) has published guidance relative to vibration impacts. According to the FTA, fragile
buildings can be exposed to ground -borne vibration levels of 0.3 inches per second without experiencing
structural damage.
3.3 Vibration Perception
There are three main types of vibration propagation: surface, compression, and shear waves. Surface
waves, or Rayleigh waves, travel along the ground's surface. These waves carry most of their energy
along an expanding circular wave front, similar to ripples produced by throwing a rock into a pool of
water. P-waves, or compression waves, are body waves that carry their energy along an expanding
spherical wave front. The particle motion in these waves is longitudinal (i.e., in a "push-pull" fashion).
P-waves are analogous to airborne sound waves. S -waves, or shear waves, are also body waves that carry
energy along an expanding spherical wave front. However, unlike P-waves, the particle motion is
transverse, or side-to-side and perpendicular to the direction of propagation.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Ground -Borne Vibration Fundamentals
As vibration waves propagate from a source, the vibration energy decreases in a logarithmic nature and
the vibration levels typically decrease by 6 VdB per doubling of the distance from the vibration source.
As stated above, this drop-off rate can vary greatly depending on the soil but has been shown to be
effective enough for screening purposes, in order to identify potential vibration impacts that may need
to be studied through actual field tests.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Regulatory Setting
4.0 Regulatory Setting
The proposed project is located in the City of La Quinta and noise regulations are addressed through the
efforts of various federal, state and local government agencies. The agencies responsible for regulating
noise are discussed below.
4.1 Federal Regulations
The adverse impact of noise was officially recognized by the federal government in the Noise Control Act
of 1972, which serves three purposes:
• Publicize noise emission standards for interstate commerce
• Assist state and local abatement efforts
• Promote noise education and research
The Federal Office of Noise Abatement and Control (ONAC) originally was tasked with implementing the
Noise Control Act. However, it was eventually eliminated leaving other federal agencies and committees
to develop noise policies and programs. Some examples of these agencies are as follows: The
Department of Transportation (DOT) assumed a significant role in noise control through its various
agencies. The Federal Aviation Agency (FAA) is responsible to regulate noise from aircraft and airports.
The Federal Highway Administration (FHWA) is responsible to regulate noise from the interstate highway
system. The Occupational Safety and Health Administration (OSHA) is responsible for the prohibition of
excessive noise exposure to workers.
The federal government advocates that local jurisdiction use their land use regulatory authority to
arrange new development in such a way that "noise sensitive" uses are either prohibited from being
constructed adjacent to a highway or, or alternatively that the developments are planned and
constructed in such a manner that potential noise impacts are minimized.
Since the federal government has preempted the setting of standards for noise levels that can be emitted
by the transportation source, the City is restricted to regulating the noise generated by the
transportation system through nuisance abatement ordinances and land use planning.
4.2 State Regulations
Established in 1973, the California Department of Health Services Office of Noise Control (ONC) was
instrumental in developing regularity tools to control and abate noise for use by local agencies. One
significant model is the "Land Use Compatibility for Community Noise Environments Matrix." The matrix
allows the local jurisdiction to clearly delineate compatibility of sensitive uses with various incremental
levels of noise.
The State of California has established noise insulation standards as outlined in Title 24 and the Uniform
Building Code (UBC) which in some cases requires acoustical analyses to outline exterior noise levels and
to ensure interior noise levels do not exceed the interior threshold. The State mandates that the
legislative body of each county and city adopt a noise element as part of its comprehensive general plan.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Regulatory Setting
The local noise element must recognize the land use compatibility guidelines published by the State
Department of Health Services. The guidelines rank noise land use compatibility in terms of normally
acceptable, conditionally acceptable, normally unacceptable, and clearly unacceptable as illustrated in
Exhibit D. (Table IV -3 and Exhibit III -12 of the City's GP, EIR).
Exhibit D: Land Use Compatibility Guidelines
Table IV -3
Land Use Compatibility for Community Noise Environments
Land Uses
CNEL (d BA)
So
i5
60
65 70 75 80
Residential -Single Family Dwellings,
Duplex, Mobile Homes
Residential — Multiple Fami ly
Transient Ledging: Hotels and Motels
kkkxkkx
School Classrooms, Libraries, Churches,
Hospitals, Nursing Homes and
ConvalalCerlt Hospitals
}}}}}}}}}}
AuditcyHum5, tonCert Halls, Amphitheaters
Sports Arena9, Outdoor Spectator Sports
Playgrounds, Neighborhood Parks
Golf Courses, Riding Stables, water
Recreation, Cemeteries
Office Buildings, ButineAs, Comm arcial and
Professional
kkkkkkk`.
Industrial, Manufacturing, Utilities,
A&Culture
kk
Source: Cali f ernia Deportment of Health Services, "Guidelrn-es for the Preparation and
Content o f ihtNeise Element of the General Phan," tygo
�Nwmally Aueplahle: With no special noise reduction requirernentsassumlgg standard
construction.
Condltionally Acceptable: New construction or development should be undertaken only after
a detailed analysis of the nuke reduction requirement is made and needed noise insulation
features included In the design
Normally Unacceptable: New construction is discouraged- If new construction does proceed, a
detailed analysis of the noise redudlon requirements must be made and needed noise
insulatlonfeatiuresincluded lin the design_
■ Clearly Unacceptable: Newconstrucdon or development should generaLly not be undertaken.
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Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Regulatory Setting
4.3 City of La Quinta Noise Regulations
The City of La Quinta outlines their noise regulations and standards within the Noise Element from the
General Plan and the Noise Ordinance from the Municipal Code.
City of La Quinta General Plan
Applicable policies and standards governing environmental noise in the City are set forth in Chapter IV
of the General Plan, Environmental Hazards, Noise. Table IV -3 (Exhibit D of this report) of the City's Noise
Element outlines the exterior noise standards for community noise environments. According to said
Table IV -3, multiple family residential noise limits are normally acceptable up to 60 dBA CNEL and
conditionally acceptable up to 65 dBA CNEL.
In addition to the noise standards, the City has outlined goals, policies, and implementation measures
to reduce potential noise impacts and are presented below:
Goals, Policies, and Implementation Measures
Policies, goals and implementation program measures from the Noise Element that would mitigate
potential impacts on noise include the following.
Goal N-1: A healthful noise environment which complements the City's residential and resort character.
Policy N.1.1: Noise standards in the City shall be consistent with the Community Noise and Land
Use Compatibility scale described in this Element.
Program N1.1.a: Propose to City Council an amendment to the Municipal Code (Section 9.100.210)
to allow 65 dBA CNEL for sensitive land uses.
Program N1.1.b: Ensure that City Building Code standards include interior noise level standards that
are consistent with the Community Noise and Land Use Compatibility scale.
Policy N.1.2: New residential development located adjacent to any roadway identified in Table
IV -4 as having a build out noise level in excess of 65 dBA shall continue to be
required to submit a noise impact analysis in conjunction with the first Planning
Department application, which demonstrates compliance with the City's noise
standards.
Policy N.1.3: New non-residential development located adjacent to existing residential
development, sensitive receptors or residentially designated land, shall be required
to submit a noise impact analysis in conjunction with the first Planning Department
application, which demonstrates that it will not significantly impact the adjacent
residential development or residential land.
Program N1.3.a: Provide accommodation for special events in the public interest, such as concerts
and festivals, which may temporarily exceed the maximum allowable decibel level.
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Noise Impact Study
City of La Quinta, CA Regulatory Setting
Policy N.1.4: All Mixed Use projects shall be required to submit a noise impact analysis in
conjunction with the first Planning Department application, which demonstrates
compliance with the City's noise standards.
Policy N.1.5: All noise impact analysis will include, at a minimum, short-term construction noise
and noise generated by the daily operation of the project at build out.
Policy N.1.6: The City may require remedial noise control plans and/or improvements for areas
experiencing noise in excess of adopted City standards.
Program N1.6.a: Remedial improvements will be included in the Capital Improvement Program.
Policy N.1.7: Noise impact analysis shall be included in all City Capital Improvement Plan (CIP)
and developer -required roadway widening projects to demonstrate compliance
with City noise standards.
Policy N.1.8: Maintain a truck route plan restricting truck travel to arterial roadways.
RELATED GOALS
As described above, this Element relates to others in this General Plan. The following Goals and their
associated policies and programs are closely related to those of this Element.
GOAL LU -1: Land use compatibility throughout the City.
GOAL LU -3: Safe and identifiable neighborhoods that provide a sense of place.
GOAL OS -2: Good stewardship of natural open space and [reservation of open space areas.
City of La Quinta — Noise Ordinance/Municipal Code
Chapter 9.100.210 of the City's Municipal Code outlines the City's noise ordinance.
Section 9.100.210 — Noise Control
A. Purpose. The noise control standards for nonresidential land use districts set forth in this section
are established to prevent excessive sound levels which are detrimental to the public health,
welfare and safety or which are contrary to the public interest.
B. Noise Standards. Exterior noise standards are set forth below. Residential property, schools,
hospitals, and churches are considered noise sensitive land uses, regardless of the land use
district in which they are located. All other uses shall comply with the "other nonresidential"
standard. All noise measurements shall be taken using standard noise measuring instruments.
Measurements shall be taken within the receiving property at locations determined by director
to be most appropriate to the individual situation.
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City of La Quinta, CA Regulatory Setting
Table 1: Land Use Compatibility for Community Noise Environments
Land Uses
CNEL (d BA)
50 55
60
65 70
75
80
Residential Single -Family Dwellings, Duplex, Mobile Homes
A
IL
C
Residential Multiple Family
A
C
Transient Lodging: Hotels and Motels
C
Schools Classrooms, Libraries, Churches, Hospitals, Nursing
Homes and Convalescent Hospitals
A
C
;;
Auditoriums, Concert Halls, Amphitheaters
C
Sports Arenas, Outdoor Spectator Sports
_79
C
Playgrounds, Neighborhood Parks
A
C
D
Golf Courses, Riding Stables, Water Recreation, Cemeteries
A
C
Office Buildings, Business, Commercial and Professional
A
Industrial, Manufacturing, Utilities, Agriculture
A
Source: California Department of Health Services, "Guidelines for the Preparation and Content of the Noise Element of the
General Plan," 1990.
Chart Legend
A Normally Acceptable: With no special noise reduction requirements assuming standard construction.
B Conditionally Acceptable: New construction or development should be undertaken only after a detailed analysis of the
noise reduction requirements is made and needed noise insulation features included in the design.
14
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Regulatory Setting
C Normally Unacceptable: New construction is discouraged. If new construction does proceed, a detailed analysis of the noise
reduction requirements must be made and needed insulation features included in the design.
D Clearly Unacceptable: New construction or development should generally not be undertaken.
Table 2: Exterior Noise Standards
Receiving Land Use
Noise Standard
Time Period
Noise sensitive
65 dB(A)
7:00 a.m. - 10:00 p.m.
50 dB(A)
10:00 p.m. - 7:00 a.m.
Other nonresidential
75 dB(A)
7:00 a.m. - 10:00 p.m.
65 dB(A)
10:00 p.m. - 7:00 a.m.
If the noise consists entirely of impact noise, simple tone noise, speech or music, or any combination
thereof, each of the noise levels specified in the table in this section shall be reduced by five (5) dB(A).
C. Noise Limits. It is unlawful for any person at any location within the city to create any noise, or
to allow the creation of any noise on property owned, leased, occupied or otherwise controlled
by such person, when such noise causes the noise level, when measured on any adjacent
property, to exceed:
1. The noise standard for a cumulative period of more than thirty (30) minutes in any hour:
2. The noise standard plus five (5) dB(A) for a cumulative period of more than fifteen (15)
minutes in any hour;
3. The noise standard plus ten (10) dB(A) for a cumulative period of more than five (5)
minutes in any hour;
4. The noise standard plus fifteen (15) dB(A) for a cumulative period of more than one (1)
minute in any hour; or
5. The noise standard plus twenty (20) dB(A) for any period of time.
For purposes of this section, the term "cumulative period" means the number of minutes that
noise occurs within any hour, whether such minutes are consecutive or not.
D. Ambient Noise Level. If the ambient or background noise level exceeds any of the preceding noise
categories, no increase above such ambient noise level shall be permitted.
Exceptions. The following are exempt from noise restrictions of this section:
1. Emergency vehicles or other emergency operations.
2. City maintenance, construction or similar activities.
3. Construction activities regulated by Section 6.08.050 of the La Quinta Municipal Code.
4. Golf course maintenance activities between 5:30 a.m. and ending no later than 8:00 p.m.
on any given day
F. Enforcement. The city manager or designee shall have the responsibility and authority to enforce
the provisions of this section.
15
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Regulatory Setting
Chapter 6.08.050 — Disturbances by construction noises
A. It is a nuisance and it is unlawful, for any person to be engaged or employed, or for any person
to cause any other person to be engaged or employed, in any work of construction, erection,
alteration, repair, addition to, or improvement to realty, except between the hours set forth as
follows:
October 1st through April 30th
Monday — Friday:
7:00 a.m. to 5:30 p.m.
Saturday:
8:00 a.m. to 5:00 p.m.
Sunday:
none
Holidays*:
none
May 1st through September 30th
Monday — Friday:
6:00 a.m. to 7:00 p.m.
Saturday:
8:00 a.m. to 5:00 p.m.
Sunday:
none
Holidays*:
none
*For purposes of this section, the following shall be considered Holidays:
New Year's Day (January 1st)
Dr. Martin Luther King Jr. Day (third Monday in January)
President's Day (third Monday in February formerly Washington's birthday)
Memorial Day (last Monday in May)
Independence Day (July 4th)
Labor Day (first Monday in September)
Veteran's Day (November 11th)
Thanksgiving (fourth Thursday in November)
Christmas Day (December 25 th)
B. No person doing or causing work prohibited by subsection A of this section, after being informed
orally or in writing that the work is in violation of subsection A, shall fail, refuse or neglect to
cease said work.
Exceptions:
1. Emergency repair of existing installations or equipment or appliances:
2. Construction work complying with the terms of a written early work permit which
may be issued by the city manager or designee, upon a showing of sufficient need
due to hot or inclement weather, or the use of an unusually long process material,
or other circumstances of unusual and compelling nature.
16
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Study Method and Procedure
5.0 Study Method and Procedure
The following section describes the noise modeling procedures and assumptions used for this
assessment.
5.1 Noise Measurement Procedure and Criteria
Noise measurements are taken to determine the existing noise levels. A noise receiver or receptor is any
location in the noise analysis in which noise might produce an impact. The following criteria are used to
select measurement locations and receptors:
• Locations expected to receive the highest noise impacts, such as first row of houses
• Locations that are acoustically representative and equivalent of the area of concern
• Human land usage
• Sites clear of major obstruction and contamination
MD conducted the sound level measurements in accordance to CalTrans technical noise specifications. All
measurements equipment meets American National Standards Institute (ANSI) specifications for sound
level meters (S1.4-1983 identified in Chapter 19.68.020.AA). The following gives a brief description of the
Caltrans Technical Noise Supplement procedures for sound level measurements:
• Microphones for sound level meters were placed 5 -feet above the ground for all measurements
• Sound level meters were calibrated (Larson Davis CAL 200) before and after each measurement
• Following the calibration of equipment, a wind screen was placed over the microphone
• Frequency weighting was set on "A" and slow response
• Results of the long-term noise measurements were recorded on field data sheets
• During any short-term noise measurements any noise contaminations such as barking dogs, local
traffic, lawn mowers, or aircraft fly -overs were noted
• Temperature and sky conditions were observed and documented
5.2 Noise Measurement Locations
Noise monitoring locations were selected based on the distance of the nearest sensitive on-site receptors
to the main noise source (Washington Road). Short-term noise measurements were conducted near the
northeastern, southeastern, and western corners of the project site. Measurements represent ambient
levels at the site. Appendix A includes photos, field sheet, and measured noise data. Exhibit E (next page)
illustrates the location of the measurements.
5.3 FHWA Traffic Noise Prediction Model
Traffic noise from vehicular traffic was projected using a computer program that replicates the FHWA
Traffic Noise Prediction Model (FHWA-RD-77-108). The FHWA model arrives at the predicted noise level
through a series of adjustments to the Reference Energy Mean Emission Level (REMEL). Roadway
volumes and percentages correspond to the project's traffic impact study as projected by the Trip
Generation and VMT scoping agreement for Washington Street and Avenue 50 multi -family
17
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Study Method and Procedure
development made by Integrated Engineering Group, and the City's General Plan, Chapter II Circulation
(Modified — January 2017). The referenced traffic data was applied to the model and is in Appendix B.
The following outlines the key adjustments made to the REMEL for the roadway inputs:
• Roadway classification — (e.g. freeway, major arterial, arterial, secondary, collector, etc),
• Roadway Active Width — (distance between the center of the outer most travel lanes on each side
of the roadway)
• Average Daily Traffic Volumes (ADT), Travel Speeds, Percentages of automobiles, medium trucks
and heavy trucks
• Roadway grade and angle of view
• Site Conditions (e.g. soft vs. hard)
• Percentage of total ADT which flows each hour through -out a 24-hour period
Table 3 indicates the roadway parameters and vehicle distribution utilized for this study.
Table 3: Roadway Parameters and Vehicle Distribution
Roadway
Segment
Existing ADT'
Existing Plus
Speed (MPH)
Site
Project
ADT
Conditions
Washington St
Eisenhower Dr to Ave 50
41,381
42,628
50
Hard
Avenue 50
Wash. St to Jefferson St
16,121
16,329
50
Hard
Major Arterial Vehicle Distribution (Truck Mix)'
Daytime %
Night
Motor -Vehicle Type
(7AM to 7
o
Evening /
(10 PM to 7
Total % of
(7 PM to 10 PM)
Traffic Flow
PM)
AM)
Automobiles
81.4
10.4
8.2
96.05
Medium Trucks
86.7
5.3
8.0
2.65
Heavy Trucks
89.2
3.4
7.3
1.30
Notes:
1 Per La Quinta General Plan Chapter II Circulation, 01/2017) LOS C, and Trip Generation and VMT scoping agreement, Integrated Engineering Group.
'Trip distribution per Integrated Engineering Group TIA report December 2021, Figure 2.
3 Vehicle distribution data is based on La Quinta General Plan Environmental Impact Report, Sect. III., O. Transportation/Traffic.
The following outlines key adjustments to the REMEL for project site parameter inputs:
• Vertical and horizontal distances (Sensitive receptor distance from noise source)
• Noise barrier vertical and horizontal distances (Noise barrier distance from sound source and
receptor).
• Traffic noise source spectra
• Topography
MD projected the traffic noise levels to the on-site receptors. The project noise calculation worksheet
outputs are located in Appendix B.
18
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Study Method and Procedure
5.4 FHWA Roadway Construction Noise Model
The construction noise analysis utilizes the Federal Highway Administration (FHWA) Roadway Construction
Noise Model (RNCM), together with several key construction parameters. Key inputs include distance to
the sensitive receiver, equipment usage, % usage factor, and baseline parameters for the project site.
The project was analyzed based on the different construction phases. Construction noise is expected to be
loudest during the grading, concrete and building phases of construction. The construction noise calculation
output worksheet is located in Appendix C. The following assumptions relevant to
short-term construction noise impacts were used:
• It is estimated that construction will occur over a 1 to 2 -year time period. Construction noise is
expected to be the loudest during the grading, concrete, and building phases.
19
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Study Method and Procedure
= Short -Term
Monitoring Location
Exhibit E
Measurement Locations
A-
4
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' �++•i�' i.�.'s*„ ..'{� ��N fix_. .�`.
I, a.�•�'li. Yom•4
A ■ 1 �•s-.- • Tin •� r
19
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IALI�
�;
20
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Existing Noise Environment
6.0 Existing Noise Environment
Three (3) short-term (30 -min) ambient noise measurement were conducted at or near the project site.
The noise measurements were taken to determine the existing baseline noise conditions.
6.1 Short -Term Noise Measurement Results
The results of the short-term noise data are presented in Table 4.
Table 4: Short -Term Nosie Measurement Data (dBA)1
Date
Location
Start
Stop
30 -minutes dB(A)
LEQ
LMAX
LMIN
10/19/2021
ST -1
01:03 PM
01:23 PM
45.5
62.4
38.2
10/19/2021
ST -2
01:09 PM
01:29 PM
61.1
79.7
37.2
10/19/2021
ST -3
01:33 PM
01:53 PM
65.8
79.6
40.2
Notes:
1. Short-term noise monitoring locations (ST -1 through ST -3) are illustrated in Exhibit E. The quietest measured noise level is at location ST -1.
Noise data indicate the equivalent ambient level ranged between 45.5 dBA to 65.8 dBA near the project
site. Maximum levels reach up to 79.7 dBA at the ST -2 location. The quietest noise level measured 37.2
dBA at location ST -2. The measured ambient level at or near the project site shows that the primary
noise source is traffic along Washington Street. Additional field notes and photographs are provided in
Appendix A.
21
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Future Noise Environment Impacts and Mitigation
7.0 Future Noise Environment Impacts and Mitigation
This assessment analyzes future noise impacts to and from the project and compares the results to the
City's Noise Standards. The analysis details the estimated exterior noise levels associated with traffic
from adjacent roadways.
7.1 Future Exterior Noise
The following outlines the exterior noise levels associated with the proposed project.
7.1.1 Noise Impacts to Off -Site Receptors Due to Project Generated Traffic
A worst-case project generated traffic noise level was modeled utilizing the FHWA Traffic Noise
Prediction Model - FHWA-RD-77-108. Traffic noise levels were calculated 180 feet from the centerline
of Washington Street and 120 feet from the centerline of Avenue 50 roadway. The trip generation for
the multi -family residence project is 2,079, distributed 60% on Washington Street and 10% on Avenue
50. The modeling is theoretical and does not take into account any existing barriers, structures, and/or
topographical features that may further reduce noise levels. Therefore, the levels are shown for
comparative purposes only to show the difference in with and without project conditions. In addition,
the noise contours for 60, 65 and 70 dBA CNEL were calculated. The potential off-site noise impacts
caused by an increase of traffic from operation of the proposed project on the nearby roadways were
calculated for the following scenarios:
Existing Year (without Project): This scenario refers to existing year traffic noise conditions.
Existing Year (Plus Project): This scenario refers to existing year + project traffic noise conditions.
Table 5 compares the without and with project scenario and shows the change in traffic noise levels as
a result of the proposed project. It takes a change of 3 dB or more to hear a perceptible difference. As
demonstrated in Table 5, the project is anticipated to generate a small change in the noise CNEL level.
The change in noise level is less than significant as 0.2 dBA noise increase is projected. No further
mitigation is required.
7.1.2 Noise Impacts to On -Site Receptors Due to Traffic
Traffic noise from the local roadway network was evaluated and compared to the City's noise
compatibility matrix. Per the City's Land Use Compatibility (Section 9.100.210 from Municipal Code),
multi -family residential is conditionally acceptable up to 65 dBA CNEL. As shown in Table 5, Existing Plus
Project traffic 70 dBA CNEL noise projections from Washington Street will reach up to 173 feet from the
centerline of the Roadway. Residential structures are located approximately 180 feet away from
Washington Street centerline and fall within the 70 to 65 dBA CNEL contour of the Roadway and are
located within the conditionally acceptable region for multiple -family residential (per land use
compatibility matrix).
22
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Future Noise Environment Impacts and Mitigation
To mitigate exterior to interior noise levels to the multi -family uses the project shall implement noise
control solutions to mitigate interior noise levels down to 45 dBA CNEL which requires a noise reduction
of at least 25 dBA or more for the first and second floor units.
Table 5: Existing Scenario - Noise Levels Along Roadways (dBA CNEL)
Existing Without Project Exterior Noise Levels
Existing With Project Exterior Noise Levels
Roadway
Segment
CNEL
Distance to Contour (Ft)
70 dBA
CNEL
65 dBA
CNEL
60 dBA
CNEL
55
dBA
CNEL
Roadway
Segment
at 180
Ft (dBA)
Washington St
Eisenhower Dr to Avenue 50
1 69.7
1 169
536
1694
5357
Avenue 50
Washington St to Jefferson St
1 67.6
1 70
1 220
1 695
1 2199
Existing With Project Exterior Noise Levels
Roadway
Segment
CNEL
at 180
Ft (dBA)
CNEL at 60 Feet dBA 1,2
Distance to Contour (Ft)
70 dBA 65 dBA 60 dBA
CNEL CNEL CNEL
55
dBA
CNEL
Washington St
Eisenhower Dr to Avenue 50
1 69.9
1 175
552 1745
5518
Avenue 50
Washington St to Jefferson St
1 67.7
1 70
1 223 1 704 1
2228
Change in Existing Noise Levels as a Result of Project
7.1.3 Noise Impacts to Off -Site Receptors Due to Operational Traffic
The nearest off-site sensitive uses are located across Washington Street to the west of the project site.
Due to the projected change in noise contour are beyond the residences locations, the project's
operations will have no impact on any off-site sensitive uses.
7.2 Summary of Recommendations
The following recommendations are provided:
MM -1: The project shall achieve a minimum of 25 dBA noise reduction in the residential building
shell design to meet the City's 45 dBA CNEL interior residential requirement.
23
CNEL at 60 Feet dBA 1,2
Change
Existing
Existing
potential
Roadway
Segment
Without
With
in
Significant
Noise
Project
Project
Impact
Level
Washington St
Eisenhower Dr to Avenue 50
69.7
69.9
0.2
No
Avenue 50
Washington St to Jefferson St
67.6
1 67.7
1 0.17
No
Notes:
'Exterior noise levels calculated at 5 feet above ground level.
z Noise levels calculated from centerline of subject roadway.
7.1.3 Noise Impacts to Off -Site Receptors Due to Operational Traffic
The nearest off-site sensitive uses are located across Washington Street to the west of the project site.
Due to the projected change in noise contour are beyond the residences locations, the project's
operations will have no impact on any off-site sensitive uses.
7.2 Summary of Recommendations
The following recommendations are provided:
MM -1: The project shall achieve a minimum of 25 dBA noise reduction in the residential building
shell design to meet the City's 45 dBA CNEL interior residential requirement.
23
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Construction Noise Impact
8.0 Construction Noise Impact
The degree of construction noise may vary for different areas of the project site and also vary depending
on the construction activities. Noise levels associated with the construction will vary with the different
phases of construction.
8.1 Construction Noise
The Environmental Protection Agency (EPA) has compiled data regarding the noise -generated
characteristics of typical construction activities. The data is presented in Table 6.
Table 6: Typical Construction Noise Levels'
Equipment Powered by Internal Combustion Engines
Type
I
Noise Levels (dBA) at 50 Feet
Earth Moving
Compactors (Rollers)
73-76
Front Loaders
73-84
Backhoes
73-92
Tractors
75-95
Scrapers, Graders
78-92
Pavers
85-87
Trucks
81-94
Materials Handling
Concrete Mixers
72-87
Concrete Pumps
81-83
Cranes (Movable)
72-86
Cranes (Derrick)
85-87
Stationary
Pumps
68-71
Generators
71-83
Compressors
75-86
Impact Equipment
Type Noise Levels (dBA) at 50 Feet
Saws 71-82
Vibrators 68-82
Notes:
Referenced Noise Levels from the Environmental Protection Agency (EPA)
Construction noise is considered a short-term impact and would be considered significant if construction
activities are taken outside the allowable times as described in the City's Municipal Code (Section
6.08.050(A)). Construction is anticipated to occur during the permissible hours according to the City's
Municipal Code. Construction noise will have a temporary or periodic increase in the ambient noise level
above the existing within the project vicinity. Furthermore, noise reduction measures are provided to
further reduce construction noise. The impact is considered not significant however construction noise
level projections are provided.
24
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Construction Noise Impact
Typical operating cycles for these types of construction equipment may involve one or two minutes of
full power operation followed by three to four minutes at lower power settings. Noise levels will be
loudest during grading phase. A likely worst-case construction noise scenario during grading assumes
the use of a grader, a dozer, and two (2) excavators, two (2) backhoes and a scraper operating at 290
feet from the nearest sensitive receptor (north residences).
Assuming a usage factor of 40 percent for each piece of equipment, unmitigated noise levels at 290 feet
have the potential to reach 70 dBA Leq and 74 dBA Lmax at the nearest sensitive receptors during grading.
Noise levels for the other construction phases would be lower and range between 63 to 66 dBA.
8.2 Construction Vibration
Construction activities can produce vibration that may be felt by adjacent land uses. The construction of
the proposed project would not require the use of equipment such as pile drivers, which are known to
generate substantial construction vibration levels. The primary vibration source during construction may
be from a bull dozer. A large bull dozer has a vibration impact of 0.089 inches per second peak particle
velocity (PPV) at 25 feet which is perceptible but below any risk to architectural damage.
The fundamental equation used to calculate vibration propagation through average soil conditions and
distance is as follows:
PPVequipment = PPVref (100/Drec)n
Where: PPVref = reference PPV at 100ft.
Drec = distance from equipment to receiver in ft.
n = 1.1 (the value related to the attenuation rate through ground)
The thresholds from the Caltrans Transportation and Construction Induced Vibration Guidance Manual
in Table 7 (below) provides general thresholds and guidelines as to the vibration damage potential from
vibratory impacts.
Table 7: Guideline Vibration Damage Potential Threshold Criteria
Structure and Condition
Maximum PPV (in/sec)
Transient Sources
Continuous/Frequent
Intermittent Sources
Extremely fragile historic buildings, ruins, ancient monuments
0.12
0.08
Fragile buildings
0.2
0.1
Historic and some old buildings
0.5
0.25
Older residential structures
0.5
0.3
New residential structures
1.0
0.5
Modern industrial/commercial buildings
2.0
0.5
Source: Table 19, Transportation and Construction Vibration Guidance Manual, Caltrans, Sept. 2013.
Note: Transient sources create a single isolated vibration event, such as blasting or drop balls. Continuous/frequent intermittent sources include
impact pile drivers, pogo -stick compactors, crack -and -seat equipment, vibratory pile drivers, and vibratory compaction equipment.
25
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA Construction Noise Impact
Table 8 gives approximate vibration levels for particular construction activities. This data provides a
reasonable estimate for a wide range of soil conditions.
Table 8: Vibration Source Levels for Construction Equipment'
Equipment
Peak Particle Velocity
(inches/second) at 25 feet
Approximate Vibration Level
LV (dVB) at 25 feet
Pile driver (impact)
1.518 (upper range)
0.644 (typical)
112
104
Pile driver (sonic)
0.734 upper range
0.170 typical
105
93
Clam shovel drop (slurry wall)
0.202
94
Hydromill
0.008 in soil
66
(slurry wall)
0.017 in rock
75
Vibratory Roller
0.21
94
Hoe Ram
0.089
87
Large bulldozer
0.089
87
Caisson drill
0.089
87
Loaded trucks
0.076
86
Jackhammer
0.035
79
Small bulldozer
0.003
58
1 Source: Transit Noise and Vibration Impact Assessment, Federal Transit Administration, May 2006.
At a distance of 290 feet, a large bulldozer would yield a worst-case 0.006 PPV (in/sec) which below the
threshold of perception and any risk of damage. The impact is less than significant, and no mitigation is
required.
8.3 Construction Noise Reduction Measures
Construction operations must follow the City's General Plan and the Noise Ordinance, which states that
construction, repair or excavation work performed must occur within the permissible hours. To further
ensure that construction activities do not disrupt the adjacent land uses, the following measures should
be taken:
1. Construction should occur during the permissible hours as defined in Section 6.08.050(A).
2. During construction, the contactor shall ensure all construction equipment is equipped with
appropriate noise attenuating devices.
3. The contractor should locate equipment staging areas that will create the greatest distance
between construction -related noise/vibration sources and sensitive receptors nearest the
project site during all project construction.
4. Idling equipment should be turned off when not in use.
5. Equipment shall be maintained so that vehicles and their loads are secured from rattling and
banging.
26
Troutdale Village Apartments Project - Noise
Noise Impact Study
City of La Quinta, CA References
9.0 References
State of California General Plan Guidelines: 1998. Governor's Office of Planning and Research
City of La Quinta: 2035 General Plan, Chapter IV Environmental Hazard, Noise.
City of La Quinta: 2035 General Plan, Chapter II Community Development, Circulation Element.
City of La Quinta: Chapter 9.100.210 Noise Control of the Municipal Code.
Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual. September
2018.
Trip Generation and VMT scoping agreement for Washington Street and Avenue 50 multi -family
development, La Quinta, Integrated Engineering Group, October 26, 2021.
Troutdale Village Transportation Analysis. Integrated Engineering Group, December 2021.
27
Appendix A:
Field Measurement Data
AZ Office CA Office
MD ACOUSTICS
4960 S. Gilbert Rd, Ste 1-461 1197 E Los Angeles Ave, C-256
�c na if rz n,ng anu ,yn Chandler, AZ 85249 Simi Valley, CA 93065
www.mdacoustics.com
20 -Minute Continuous Noise Measurement Datasheet
Project: La Quinta Apartments Project - Noise Site Observations: Clear sky, measurement was performed at the northeast,
Site Address/Location: Washington St and Avenue 50, La Quinta CA southeast & west lot lines. Ambient noise consisted of traffic along
Date: 10/19/2021 Washington Street and Highschool across wash channel.
Field Tech/Engineer: Jason Schuyler
General Location:
Sound Meter:
Settings:
Meteorological Con.:
Site ID:
ST -1: NTi Audio SN: A2A-05967-EO
ST -2&3: NTi Audio SN: A2A-07095-EO
A -weighted, slow, 1 -sec, 20 -minute interval
83 degrees F, 0-2 mph wind, southern direction
ST -1, ST -2 & ST -3
r
Figure 1: Monitoring Locations
eoFaadA : Y-�
�� 4a
r - `'0
e Earth
07412136 20Min_Field Sheet Awtg
Site Topo: Flat
Ground Type: Soft site
Noise Source(s) w/ Distance:
1 -meter is approx 600' from Avenue 50 CL.
2 - meter is approx 115' from Avenue 50 CL.
3 - meter is approx 70' from Washington St CL.
Figure 2: ST -1 Photo
Figure 3: ST -2 Photo
AZ Office CA Office
MD ACOUSTICS
4960 S. Gilbert Rd, Ste 1-461 1197 E Los Angeles Ave, C-256
Sound Solutions for Planning and Design Chandler, AZ 85249 Simi Valley, CA 93065
www.mdacoustics.com
20 -Minute Continuous Noise Measurement Datasheet - Cont.
Project: La Quinta Apartments Project - Noise
Site Address/Location: Washington St and Avenue 50, La Quinta CA
Site ID: ST -1, ST -2 & ST -3
Figure 4: ST -3 Photo
Table 1: 20 -Min Baseline Noise Measurement Summary
Figure 5: ST -3 Photo
Location
Start
Stop
Leq
Lmax
Lmin
L2
L8
L25
L50
L90
1
1:03 PM
1:23 PM
45.5
62.4
33.7
51.9
48.6
45.4
42.9
38.2
2
1:09 PM
1:29 PM
61.1
79.7
37.2
69.2
65.6
61.8
55.9
42.5
3
1:33 PM
1:53 PM
65.8
79.6
40.2
72.2
69.9
66.8
63.4
52.6
07412136 20Min_Field Sheet Awtg
AZ Office CA Office
MD ACOUSTICS
4960 S. Gilbert Rd, Ste 1-461 1197 E Los Angeles Ave, C-256
Sound Solutions for Planning and Design Chandler, AZ 85249 Simi Valley, CA 93065
www.mdacoustics.com
20 -Minute Continuous Noise Measurement Datasheet - Cont.
Site Address/Location: Washington St and Avenue 50, La Quinta CA
Site ID: ST -1
70
65
60
55
50
co
m
45
40
35
30
25
ST -1: Ambient Noise Level (1 -sec)
• Leq-1 LAeq_dt
SOON
� mod as
N qi M O V 17! u7 N O M ci 15t N In M O V 7i In N O M 7! V N Ln M O V 7! Ln N O M 7!
m m � lfl r11 l0 1p N W W T O1 O O 1-4 N N M M ul Ln l0 l0 n N W Ol Ol O O M
M M M M m m m M co m m M M M m m m co M m m M M M M m m M M m m M M m m
Time
07412136 20Min_Field Sheet Awtg
AZ Office CA Office
MD ACOUSTICS
4960 S. Gilbert Rd, Ste 1-461 1197 E Los Angeles Ave, C-256
Sound Solutions for Planning and Design Chandler, AZ 85249 Simi Valley, CA 93065
www.mdacoustics.com
20 -Minute Continuous Noise Measurement Datasheet - Cont.
Site Address/Location: Washington St and Avenue 50, La Quinta CA
Site ID: ST -2
85.00
75.00
65.00
co 55.00
0
45.00
twelf7
25.00
ST -2: Ambient Noise Level (1 -sec)
• Leq-2 LAeq_dt
rn v rn v rn a M a rn a rn v rn v M a rn a rn a rn v rn v rn v M a rn a rn v m v M
O V 7! qi N O M ci V N Ln M O V .i rn N O M 7! V N Ln M O V 7! Ln N O M 7! V N Ln
Ol Ol O O i --I N N M M �T r.r1 l0 l0 n n W Ol T O O i --I 1-1 N M M Ln l0 l0 n n W 00
O O 7! t t t ci t t t t t t t t ci t t N N N N N N N N N N N N N N N N
M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M
Time
07412136 20Min_Field Sheet Awtg
AZ Office CA Office
MD ACOUSTICS
4960 S. Gilbert Rd, Ste 1-461 1197 E Los Angeles Ave, C-256
Sound Solutions for Planning and Design Chandler, AZ 85249 Simi Valley, CA 93065
www.mdacoustics.com
20 -Minute Continuous Noise Measurement Datasheet - Cont.
Site Address/Location: Washington St and Avenue 50, La Quinta CA
Site ID: ST -3
85.00
80.00
75.00
70.00
65.00
m 60.00
55.00
50.00
45.00
40.00
35.00
ST -3: Ambient Noise Level (1 -sec)
— — Leq-3 LAeq_dt
co ao m oo m oo m oo m oo co ao m oo m oo m oo m oo co ao m oo m oo m oo m oo co ao m oo m
In N O m c! N Ln M O t 7! T N O m ci '5: N T M O 7t 71 T N O M 71 '5: N In n O 7t
co V u't lf1 l0 l0 n n 00 at 4> O O -4 N N M M V V u1 l0 l0 I, n W 01 01 O O .-i -4 N M m
M m m m m m m m m m m 15: 7t 15: 7t 7t 7t 7t 7t 15: 7t 15: rn rn rn rn rn T rn
M M m m m m m m m M M m m m m m m m m m M m m m m m m m m M M m m m m
ti ti N N N N N N ti ti ti N N N N N N N ti ti ti N N N N N N N ti ti ti N N N N
Time
07412136 20Min_Field Sheet Awtg
Appendix 6:
Traffic FHWA Worksheets
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT: La Quinta Apartments JOB #: 0741-21-36
ROADWAY: Washington St DATE: 12 -Jan -22
LOCATION: Northeast portion of the Washington St and Avenue 50 intersection, La Quinta, CA ENGINEER: F. Irarrazabal
NOISE INPUT DATA
ADT=
42,628
RECEIVER DISTANCE =
180
SPEED =
50
DIST C/L TO WALL =
65
PK HR %=
10
RECEIVER HEIGHT=
5.0
NEAR LANE/FAR LANE DIS
98
WALL DISTANCE FROM RECEIVER
115
ROAD ELEVATION =
0.0
PAD ELEVATION =
0.0
GRADE =
0.0 %
ROADWAY VIEW: LF ANGLE=
-90
PK HR VOL =
4,263
RT ANGLE=
90
69.3
1 65.5
DF ANGLE=
180
AUTOMOBILES = 10 HTH WALL 0.0
MEDIUM TRUCKS = 10 (10 = HARD SITE, 15 = SOFT SITE) AMBIENT= 0.0
HEAVY TRUCKS = 10 BARRIER = 0 (0 = WALL, 1= BERM)
VEHICLE TYPE
DAY
EVENING
NIGHT
DAILY
AUTOMOBILES
0.814
0.104
0.082
0.9605
MEDIUM TRUCK
0.867
0.053
0.080
0.0265
HEAVY TRUCKS
0.892
0.034
0.073
0.0130
VEHICLE TYPE
I HEIGHT
ISLE DISTANC
GRADE ADJUSTMENT
AUTOMOBILES
2.0
173.23
67.8
MEDIUM TRUCKS
4.0
173.21
68.6
HEAVYTRUCKS
8.0
173.23
0.00
NOISE OUTPUT DATA
VEHICLE TYPE
PK HR LEQ
DAY LEQ EVEN LEQ NIGHT LEO
LDN
CNEL
AUTOMOBILES
69.5
67.8
64.9
59.1
68.1
68.6
MEDIUM TRUCKS
61.6
60.2
54.0
51.1
60.1
60.4
HEAVYTRUCKS
62.7
61.4
53.2
51.8
61.1
61.3
NOISE LEVELS (dBA)
1 70.9
69.3
1 65.5
1 60.4 1
69.4
NOISE LEVELS (dBA)
1 70.9
69.3
65.5
1 60.4 1
69.4
69.9
VEHICLE TYPE
PK HR LEQ
DAY LEQ EVEN LEQ NIGHT LECI
LDN
CNEL
AUTOMOBILES
MEDIUM TRUCKS
69.5
61.6
67.8
60.2
64.9
54.0
59.1
51.1
68.1
60.1
68.6
60.4
HEAVYTRUCKS
62.7
61.4
53.2
51.8
61.1
61.3
NOISE LEVELS (dBA)
1 70.9
69.3
1 65.5
1 60.4 1
69.4
NOISE CONTOUR (FT)
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 175 552 1745 5518
LDN 157 497 1573 4974
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT: La Quinta Apartments JOB #: 0741-21-36
ROADWAY: Avenue 50 DATE: 12 -Jan -22
LOCATION: Northeast portion of the intersection of Washington St and Avenue 50 in La Quinta, CA ENGINEER: F. Irarrazabal
NOISE INPUT DATA
ADT=
16,329
RECEIVER DISTANCE =
120
SPEED =
50
DIST C/L TO WALL =
70
PK HR %=
10
RECEIVER HEIGHT=
5.0
NEAR LANE/FAR LANE DIS
98
WALL DISTANCE FROM RECEIVER
50
ROAD ELEVATION =
0.0
PAD ELEVATION =
0.0
GRADE =
0.0 %
ROADWAY VIEW: LF ANGLE=
-90
PK HR VOL =
1,633
RT ANGLE=
90
67.1
63.3
DF ANGLE=
180
AUTOMOBILES = 10 HTH WALL 0.0
MEDIUM TRUCKS = 10 (10 = HARD SITE, 15 = SOFT SITE) AMBIENT= 0.0
HEAVY TRUCKS = 10 BARRIER = 0 (0 = WALL, 1= BERM)
VEHICLE TYPE
DAY
EVENING
NIGHT
DAILY
AUTOMOBILES
0.814
0.104
0.082
0.9605
MEDIUM TRUCK
0.867
0.053
0.080
0.0265
HEAVY TRUCKS
0.892
0.034
0.073
0.0130
VEHICLE TYPE
I HEIGHT
ISLE DISTANCE
GRADE ADJUSTMENT
AUTOMOBILES
2.0
109.58
65.6
MEDIUM TRUCKS
4.0
109.54
66.4
HEAVYTRUCKS
8.0
109.58
0.00
NOISE OUTPUT DATA
VEHICLE TYPE
PK HR LEQ
DAY LEQ EVEN LEQ NIGHT LEO
LDN
CNEL
AUTOMOBILES
67.3
65.6
62.7
56.9
65.9
66.4
MEDIUM TRUCKS
59.4
58.0
51.9
48.9
57.9
58.2
HEAVYTRUCKS
60.5
59.2
51.1
49.6
58.9
59.1
NOISE LEVELS (dBA)
1 68.7
67.1
63.3
1 58.2 1
67.2
NOISE LEVELS (dBA)
1 68.7
67.1
63.3
1 58.2 1
67.2
67.7
VEHICLE TYPE
PK HR LEQ
DAY LEQ EVEN LEQ NIGHT LECI
LDN
CNEL
AUTOMOBILES
MEDIUM TRUCKS
67.3
59.4
65.6
58.0
62.7
51.9
56.9
48.9
65.9
57.9
66.4
58.2
HEAVYTRUCKS
60.5
59.2
51.1
49.6
58.9
59.1
NOISE LEVELS (dBA)
1 68.7
67.1
63.3
1 58.2 1
67.2
NOISE CONTOUR (FT)
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 70 223 704 2228
LDN 63 201 635 2008
Appendix C:
Construction Noise Modeling Output
Construction Noise Levels at Senstive Receptors by Phase
Activity
Leq at 290 FT (North)
Lmax at 290 FT(North)
Site Preparation
63
67
Grading
70 1
74
Building Construction
66
70
Architectural Coating
63
67
Equipment Summary
Reference (dBA) 50 ft
Lmax
Rock Drills
96
Jack Hammers
82
Pneumatic Tools
85
Pavers
80
Dozers
85
Scrapers
87
Haul Trucks
88
Cranes
82
Portable Generators
80
Rollers
80
Tractors
80
Front -End Loaders
86
Hydraulic Excavators
86
Graders
86
Air Compressors
86
Trucks
86
Site Preparation
dBA -A-weighted Decibels
Lmax-Maximam Level
1. -Fnni t-Ievil
Feet
Noise Level Cakulatioo Prior to Implementation of NOW Attenaatioo R n mems
No.
meat Desc ' tion
Reference dBA 50 R Lmax
anti
Usage
Factors
Distance to
Receptor
ft
G -d
Effect
Shielding
dBA
Cakuk" dBA
Lmax Le
Ener
1
2
Dozy
TracmdLoaderBackhoe
85
80
1
1
40
40
290
290
0.5
0.5
0
0
65.9
60.9
61.9
56.9
1561313.11
493730.558
Source: MD Acaawcs, LLC -Sept. 2021.
1- Perceawge ofliae Neta Piece ofewp ais oP-fia at Ul pourer.
Lm-'
67
59
63
Lw
981
55
95
dBA -A-weighted Decibels
Lmax-Maximam Level
1. -Fnni t-Ievil
Feet
Meters
Ground Effeet
No
Shielding
Leg dBA
IdBA
Shielding
L dBA
2dA
Shielding
L dBA
3dBA
Shielding
L dBA
4dBA
Shielding
Leg dBA
5dBA
Shielding
Leg dBA
6dBA
Shielding
LN dBA
7dBA
Shielding
LN dBA
8dBA
Shielding
Leg dBA
9 B
Shielding
Leg dBA
10 dBA
Shielding
Leg dBA
11 dBA
Shielding
Le dBA
12 dBA
Shielding
Leg dBA
13 dBA
Shielding
Leg dBA
14 dBA
Shielding
Leg dBA
15 dBA
Shielding
Leg dBA
50
15.2
0.5
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
60
18.3
0.5
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
70
21.3
0.5
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
80
24.4
0.5
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
90
27.4
0.5
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
100
30.5
0.5
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
110
33.5
0.5
55
54
53
52
51
50
49
48
47
46
45
44
43
42
L 4
40
40
120
36.6
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
39
130
39.6
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
140
42.7
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
150
45.7
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
160
48.8
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
170
51.8
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
180
54.9
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
190
57.9
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
200
61.0
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
210
64.0
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
220
67.1
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
230
70.1
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
240
73.1
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
250
76.2
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
260
79.2
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
270
82.3
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
280
85.3
0.5
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
290
88.4
0.5
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
300
91.4
0.5
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
310
94.5
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
320
97.5
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
330
100.6
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
340
103.6
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
350
106.7
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
360
109.7
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
370
112.8
0.5
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
Grading
dBA-A-weighted Decibels
Lmax- Maximum Level
Le.- F-ivalera Level
Feet
Noise Level Calculation Prior to I le -talon of Noise Attenoatioo R mr Dante
G .... d Eft'ect
No
Shielding
L dBA
IdBA
Shielding
L dBA
2 A
Shielding
L dBA
3dBA
Shielding
L dBA
Distance to
5dBA
Shielding
LN dBA
6dBA
Shielding
L dBA
7dA
Shielding
Ug dBA
8dBA
Shielding
L dBA
9dBA
Shielding
LN dBA
10 dBA
Shielding
L dBA
11 dBA
Shielding
Le dBA
12 dBA
Shielding
L dBA
Usage
Receptor
Ground
Shielding
Cak.lated dBA
0.5
No.
E a ment Dese ' don
Reference dBA 50 R Lmax
.anti
Factor
ft
Effec[
dBA
Lmax Le
Ener
1
G.&,
86
1
40
290
0.5
0
66.9
62.9
1965576.75
2
Dozer
85
1
40
290
0.5
0
65.9
61.9
1561313.11
3
Trector/Backhoe
80
2
40
290
0.5
0
63.9
59.9
987461.116
4
Scrapers
87
1
40
290
0.5
0
67.9
63.9
2474514.53
5
Exca 1-
86
2
40
290
0.5
0
69.9
65.9
3931153.51
S. -M Ac.a w[ LLC -Sept 2921.
L.-'
74
54
70
Lw
103
Lw
102
1- Percentage ofcime"I a pias df wp-is oP".w gat"I power.
dBA-A-weighted Decibels
Lmax- Maximum Level
Le.- F-ivalera Level
Feet
Meters
G .... d Eft'ect
No
Shielding
L dBA
IdBA
Shielding
L dBA
2 A
Shielding
L dBA
3dBA
Shielding
L dBA
4dBA
Shielding
Leg dBA
5dBA
Shielding
LN dBA
6dBA
Shielding
L dBA
7dA
Shielding
Ug dBA
8dBA
Shielding
L dBA
9dBA
Shielding
LN dBA
10 dBA
Shielding
L dBA
11 dBA
Shielding
Le dBA
12 dBA
Shielding
L dBA
13 dBA
Shielding
L dBA
14 dBA
Shielding
Le dBA
15 dBA
Shielding
L,q dBA
50
15.2
0.5
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
60
18.3
0.5
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
70
21.3
0.5
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
80
24.4
0.5
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
90
27.4
0.5
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
100
30.5
0.5
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
110
33.5
0.5
62
61
60
59
58
57
56
55
54
53
52
51
50
49
47
120
36.6
0.5
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
130
39.6
0.5
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
140
42.7
0.5
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
150
45.7
0.5
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
160
48.8
0.5
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
170
51.8
0.5
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
180
54.9
0.5
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
190
57.9
0.5
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
200
61.0
0.5
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
210
64.0
0.5
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
220
67.1
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
230
70.1
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
240
73.1
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
250
76.2
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
260
79.2
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
270
82.3
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
280
85.3
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
290
88.4
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
300
91.4
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
310
94.5
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
320
97.5
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
330
100.6
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
340
103.6
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
350
106.7
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
360
109.7
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
370
112.8
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
Buildine Construction
Sawce: MD Acauelica LLC -Sept 2921.
1-Porceatage ofcime"I a pias ofewp-ieo,'.a gat SII power.
dBA -A-weighted Decibels
Lmax- Maximum Level
Lea- Fnuivalerrc Level
Feet
Noise Level Calculation Prior to Implementation of Noise Attenuation R ou' menu
No.
E u ment Dese ' don
Ref-- dBA 50 R Lmax
anti
Distance to
Usage Receptor
ft
Factor(ft)
GroundhShiddi. Cakalated dBA
EBec[ Lmax Le Eoer
1
Forklift/T-or
80
3
40 290
0.65761.7 1481191.67
2
T --Backhoe
80
3
40 290
0. 65.7 61.7 1481191.67
3
Cranes
82
1
40 290
0. 62.9 58.9 782510.2
4
C Im
80
1
40 290
0. 60.9 56.9 493730.558
56
55
54
53
52
51
Sawce: MD Acauelica LLC -Sept 2921.
1-Porceatage ofcime"I a pias ofewp-ieo,'.a gat SII power.
dBA -A-weighted Decibels
Lmax- Maximum Level
Lea- Fnuivalerrc Level
Feet
Meters
Ground Effect
No
Shielding
L" dBA
1dBA
Shielding
Leg dBA
2dBA
Shielding
Leg dBA
3dBA
Shielding
Lq dBA
4dBA
Shielding
L dBA
'dBA
Shielding
L dBA
6dBA
Shielding
L dBA
7dBA
Shielding
L dBA
.dBA
Shielding
L dBA
9dBA
Shielding
Le dBA
10 dBA
Shielding
L dBA
11 dBA
Shielding
Le dBA
12 dBA
Shielding
L dBA
13 dBA
Shielding
Le dBA
14 dBA
Shielding
Le dBA
15 dBA
Shielding
Le dBA
50
15.2
0.5
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
6011.3
0.5
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
70
21.3
0.5
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
80
24.4
0.5
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
90
27.4
0.5
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
100
30.5
0.5
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
110
33.5
0.5
58
57
56
55
54
53
52
51
50
49
48
47
46
45
43
43
120
36.6
0.5
57
56
55
54
53
52
51
50
49
48
47
46
45
44
42
130
39.6
0.5
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
140
42.7
0.5
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
150
45.7
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
160
48.8
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
170
51.8
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
180
54.9
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
190
57.9
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
200
61.0
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
210
64.0
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
220
67.1
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
230
70.1
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
240
73.1
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
250
76.2
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
260
79.2
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
270
82.3
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
280
85.3
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
290
88.4
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
300
91.4
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
310
94.5
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
320
97.5
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
330
100.6
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
340
103.6
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
350
106.7
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
360
109.7
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
370
112.8
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
Architectural Coatina
dBA-A-weighted Decibels
Lmax- Maximum Level
Lea- F-ivalers Level
Fed
Noise Level Calculation Prior to I le -talion of Noise Attenuation R un' Drente
No.
Equip,- Descri don
Reference dBA 50 R Lmax
0-fitv
Usage
Factor
Distance to
Receptor
ft
Ground
Effect
Shiddiug
dBA
Cakalated dBA
Lmax I Le
Ener
1
A Compressor
86
1
40
290
0.5
0
66.9
62.9
1965576.75
S. -MD Acaae wi LLC -Sept 2921.
1- Porcrntage ofcime"I a pias df wpmera is operating at"I power.
Lm-'
67
59
63
Lw
99
Lw
95
dBA-A-weighted Decibels
Lmax- Maximum Level
Lea- F-ivalers Level
Fed
Meters
Ground Effect
No
Shielding
L dBA
1dBA
Shielding
L dBA
2 A
Shielding
L dBA
3dBA
Shielding
L dBA
4dBA
Shielding
Leg dBA
5dBA
Shielding
LN dBA
6dBA
Shielding
L dBA
7dA
Shielding
Leg dBA
8dBA
Shidding
LN dBA
9dBA
Shielding
LN dBA
10 dBA
Shielding
L dBA
11 dBA
Shielding
Le dBA
12 dBA
Shielding
L dBA
13 dBA
Shielding
L dBA
14 dBA
Shielding
Le dBA
15 dBA
Shielding
L1q dBA
50
15.2
0.5
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
60
18.3
0.5
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
70
21.3
0.5
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
80
24.4
0.5
58
57
5655
54
53
52
51
50
49
48
47
46
45
44
43
90
27.4
0.5
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
100
30.5
0.5
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
Il0
33.5
0.5
54
53
52
51
50
49
48
47
46
45
44
43
42
41
39
120
36.6
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
130
39.6
0.5
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
140
42.7
0.5
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
150
45.7
0.5
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
160
48.8
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
170
51.8
0.5
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
180
54.9
0.5
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
190
57.9
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
200
61.0
0.5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
210
64.0
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
220
67.1
0.5
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
230
70.1
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
240
73.1
0.5
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
250
76.2
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
260
79.2
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
270
82.3
0.5
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
280
85.3
0.5
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
290
88.4
0.5
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
300
91.4
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
3l0
94.5
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
320
97.5
0.5
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
330
100.6
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
340
103.6
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
350
106.7
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
360
109.7
0.5
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
370
112.8
0.5
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
VIBRATION LEVEL IMPACT
Project: La Quinta apartments project Date: 10/29/21
Source: Large Bulldozer
Scenario: Unmitigated
Location: Project Site
Address: NE corner of Washington Street and Avenue 50, La Quinta, CA 92253
PPV = PPVref(25/D)^n (in/sec)
DATAINPUT
Equipment = 2 Large Bulldozer INPUT SECTION IN BLUE
Type
PPVref = 0.089 Reference PPV (in/sec) at 25 ft.
D = 290.00 Distance from Equipment to Receiver (ft)
n = 1.10 Vibration attenuation rate through the ground
Note: Based on reference equations from Vibration Guidance Manual, California Department of Transportation, 2006, pgs 38-43.
DATA OUT RESULTS
PPV = 0.006 IN/SEC OUTPUT IN RED