HomeMy WebLinkAbout20191202_Noise Study
2510 West Coast Highway
Mixed-Use Development
NOISE IMPACT ANALYSIS
CITY OF NEWPORT BEACH
PREPARED BY:
Bill Lawson, PE, INCE
blawson@urbanxroads.com
(949) 336-5979
NOVEMBER 8, 2019
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TABLE OF CONTENTS
TABLE OF CONTENTS ........................................................................................................................... III
APPENDICES ........................................................................................................................................ IV
LIST OF EXHIBITS .................................................................................................................................. V
LIST OF TABLES .................................................................................................................................... V
LIST OF ABBREVIATED TERMS ............................................................................................................. VI
EXECUTIVE SUMMARY ......................................................................................................................... 1
On-Site Traffic Noise Analysis .................................................................................................................. 1
Operational Noise Analysis ...................................................................................................................... 1
Construction Noise Analysis .................................................................................................................... 2
Construction Vibration Analysis .............................................................................................................. 2
Summary of CEQA Significance Findings ................................................................................................. 3
1 INTRODUCTION ........................................................................................................................... 5
1.1 Site Location .................................................................................................................................. 5
1.2 Project Description ........................................................................................................................ 5
2 FUNDAMENTALS ......................................................................................................................... 9
2.1 Range of Noise .............................................................................................................................. 9
2.2 Noise Descriptors ........................................................................................................................ 10
2.3 Sound Propagation ...................................................................................................................... 10
2.4 Noise Control .............................................................................................................................. 11
2.5 Noise Barrier Attenuation ........................................................................................................... 12
2.6 Land Use Compatibility With Noise ............................................................................................ 12
2.7 Community Response to Noise ................................................................................................... 12
2.8 Vibration ..................................................................................................................................... 13
3 REGULATORY SETTING .............................................................................................................. 15
3.1 State of California Noise Requirements ...................................................................................... 15
3.2 State of California Building Code ................................................................................................ 15
3.3 City of Newport Beach General Plan Noise Element .................................................................. 15
3.4 City of Newport Beach Stationary (Non-Transportation) Noise Standards ................................ 18
3.5 Construction Vibration Standards ............................................................................................... 20
4 SIGNIFICANCE CRITERIA ............................................................................................................ 21
4.1 Airport Noise ............................................................................................................................... 21
4.2 Significance Criteria for Construction Noise and Vibration ........................................................ 21
4.3 Significance Criteria for Operation .............................................................................................. 21
4.3 Significance Criteria Summary .................................................................................................... 22
5 EXISTING NOISE LEVEL MEASUREMENTS ................................................................................... 23
5.1 Measurement Procedure and Criteria ........................................................................................ 23
5.2 Noise Measurement Locations ................................................................................................... 23
5.3 Noise Measurement Results ....................................................................................................... 24
6 METHODS AND PROCEDURES.................................................................................................... 27
6.1 FHWA Traffic Noise Prediction Model ........................................................................................ 27
6.2 On-Site Traffic Noise Prediction Model Inputs ........................................................................... 27
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7 ON-SITE NOISE IMPACTS FROM TRAFFIC ................................................................................... 29
7.1 Exterior Noise Analysis ................................................................................................................ 29
7.2 Interior Noise Analysis ................................................................................................................ 30
8 SENSITIVE RECEIVER LOCATIONS ............................................................................................... 31
9 OPERATIONAL NOISE IMPACTS TO NEARBY SENSITIVE RECEIVERS ............................................. 33
9.1 Operational Noise Sources .......................................................................................................... 33
9.2 Reference Operational Noise Levels ........................................................................................... 33
9.3 Project Operational Noise Levels ................................................................................................ 37
9.4 Project Operational Noise Level Compliance .............................................................................. 37
9.5 Project Operational Noise Level Contributions .......................................................................... 38
10 CONSTRUCTION NOISE IMPACTS ............................................................................................... 41
10.1 Construction Noise Sources ........................................................................................................ 41
10.2 Construction Reference Noise Levels ......................................................................................... 41
10.3 Construction Noise Levels ........................................................................................................... 44
10.4 Construction Noise Level Compliance ........................................................................................ 45
10.5 Construction Noise Abatement Measures .................................................................................. 46
10.6 Construction Vibration Impacts .................................................................................................. 47
11 REFERENCES .............................................................................................................................. 51
12 CERTIFICATION .......................................................................................................................... 53
APPENDICES
APPENDIX 3.1: CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.26
APPENDIX 3.2: CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.28
APPENDIX 5.1: STUDY AREA PHOTOS
APPENDIX 5.2: NOISE LEVEL MEASUREMENT WORKSHEETS
APPENDIX 7.1: ON-SITE TRAFFIC NOISE LEVEL CALCULATIONS
APPENDIX 9.1: OPERATIONAL NOISE LEVEL CALCULATIONS
APPENDIX 10.1: CONSTRUCTION NOISE LEVEL CALCULATIONS
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LIST OF EXHIBITS
EXHIBIT 1-A: LOCATION MAP .............................................................................................................. 6
EXHIBIT 1-B: SITE PLAN........................................................................................................................ 7
EXHIBIT 2-A: TYPICAL NOISE LEVELS .................................................................................................... 9
EXHIBIT 2-B: NOISE LEVEL INCREASE PERCEPTION ............................................................................. 13
EXHIBIT 2-C: TYPICAL LEVELS OF GROUND-BORNE VIBRATION .......................................................... 14
EXHIBIT 3-A: LAND USE NOISE COMPATIBILITY MATRIX .................................................................... 17
EXHIBIT 5-A: NOISE MEASUREMENT LOCATIONS ............................................................................... 26
EXHIBIT 8-A: RECEIVER LOCATIONS ................................................................................................... 32
EXHIBIT 9-A: OPERATIONAL NOISE SOURCE AND RECEIVER LOCATIONS ............................................ 36
EXHIBIT 10-A: CONSTRUCTION ACTIVITY AND RECEIVER LOCATIONS ................................................. 43
LIST OF TABLES
TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS .................................................................. 3
TABLE 3-1: OPERATIONAL NOISE STANDARDS ................................................................................... 19
TABLE 3-2: CONSTRUCTION NOISE STANDARDS ................................................................................ 19
TABLE 3-3 CONSTRUCTION VIBRATION STANDARDS .......................................................................... 20
TABLE 4-2: SIGNIFICANCE CRITERIA SUMMARY MATRIX ..................................................................... 22
TABLE 5-1: 24-HOUR AMBIENT NOISE LEVEL MEASUREMENTS .......................................................... 25
TABLE 6-1: ON-SITE ROADWAY PARAMETERS ................................................................................... 28
TABLE 6-2: TIME OF DAY VEHICLE SPLITS ........................................................................................... 28
TABLE 6-3: DISTRIBUTION OF TRAFFIC FLOW BY VEHICLE TYPE (VEHICLE MIX) ................................... 28
TABLE 7-1: EXTERIOR TRAFFIC NOISE LEVELS ..................................................................................... 29
TABLE 7-2: INTERIOR NOISE LEVELS (CNEL) ......................................................................................... 30
TABLE 9-1: REFERENCE NOISE LEVEL MEASUREMENTS ...................................................................... 35
TABLE 9-2: PROJECT OPERATIONAL NOISE LEVELS ............................................................................. 37
TABLE 9-3: OPERATIONAL NOISE LEVEL COMPLIANCE ....................................................................... 38
TABLE 9-4: PROJECT DAYTIME NOISE LEVEL CONTRIBUTIONS ............................................................ 39
TABLE 9-5: PROJECT NIGHTTIME NOISE LEVEL CONTRIBUTIONS ........................................................ 39
TABLE 10-1: CONSTRUCTION REFERENCE NOISE LEVELS .................................................................... 42
TABLE 10-2: CONSTRUCTION ACTIVITY NOISE LEVELS ........................................................................ 45
TABLE 10-3: CONSTRUCTION EQUIPMENT NOISE LEVEL COMPLIANCE ............................................... 46
TABLE 10-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT ...................................... 48
TABLE 10-5: CONSTRUCTION EQUIPMENT VIBRATION LEVELS ........................................................... 49
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LIST OF ABBREVIATED TERMS
(1) Reference
ADT Average Daily Traffic
ANSI American National Standards Institute
Calveno California Vehicle Noise
CEQA California Environmental Quality Act
CNEL Community Noise Equivalent Level
dBA A-weighted decibels
FHWA Federal Highway Administration
FTA Federal Transit Administration
INCE Institute of Noise Control Engineering
Leq Equivalent continuous (average) sound level
Lmax Maximum level measured over the time interval
Lmin Minimum level measured over the time interval
mph Miles per hour
PPV Peak Particle Velocity
Project Noise Study
REMEL Reference Energy Mean Emission Level
RMS Root-mean-square
VdB Vibration Decibels
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EXECUTIVE SUMMARY
Urban Crossroads, Inc. has prepared this noise study to determine the noise exposure and the
necessary noise mitigation measures for the proposed Noise Study (“Project”). The Project site
is in the mariner’s mile near the intersection of West Coast Highway and Tustin Avenue in the
City of Newport Beach. The Project is proposed to consist of a mix of residential, boutique
automotive showroom, café, and medical office use. To describe the worst-case noise
conditions, this analysis includes the additional medical office use requiring the subterranean
parking garage. The operational and construction noise impacts described in this study are
expected to be reduced if the medical office component and associated subterranean parking
garage were to be eliminated. This study has been prepared consistent with applicable City of
Newport Beach noise standards, and significance criteria based on guidance provided by
Appendix G of the California Environmental Quality Act (CEQA) Guidelines. (1)
ON-SITE TRAFFIC NOISE ANALYSIS
The primary source of traffic noise affecting the Project site is anticipated to be from West Coast
Highway and Tustin Avenue. The Project will also experience some background traffic noise
impacts from nearby drive aisles and parking lots, however, due to the low traffic volumes,
distance and intervening structures these are not anticipated to make a significant contribution
to the exterior noise levels at the Project site.
The analysis shows that the future on-site exterior traffic noise levels are expected to approach
71.8 dBA CNEL at the first floor Auto Showroom and 71.7 dBA CNEL at the second floor Medical
Office building façade facing West Coast Highway. A review of the Project elevations show that
the second residential dwelling units are largely blocked from West Coast Highway by the Medical
Office space. However, the third-floor residential dwelling units will be exposed to the traffic
noise from West Coast Highway. The analysis shows that the future on-site exterior traffic noise
levels for the noise sensitive residential dwelling units are expected to approach 64.0 dBA CNEL
at third floor building façade, which satisfies the 65 dBA CNEL exterior noise compatibility criteria
of the City of Newport Beach General Plan Noise Element for residential mixed use. Therefore,
future exterior traffic noise impacts will be less than significant.
OPERATIONAL NOISE ANALYSIS
Using reference noise levels to represent the expected noise sources from the Noise Study site,
this analysis estimates the Project-related stationary-source noise levels at nearby sensitive
receiver locations. The normal activities associated with the proposed Noise Study are
anticipated to include roof-top air conditioning units, parking lot vehicle movements, and trash
enclosures. The closest sensitive receptor to the project site is an existing outdoor play area for
the nearby Bright Horizons daycare facility located approximately 25 feet east of the site. The
operational noise analysis shows that the Project-related stationary-source noise levels will not
exceed the City’s exterior noise level standards of 55 dBA Leq during the daytime hours and 50
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dBA Leq during the nighttime hours at any nearby receiver locations, including the outdoor play
area 25 feet from the site.
Further, this analysis demonstrates that the Project will contribute a less than significant long-
term unmitigated operational noise level impact to the existing ambient noise environment at
the noise-sensitive receiver locations. Therefore, the operational noise level impacts associated
with the proposed Project activities, such as the roof-top air conditioning units, parking lot
vehicle movements, and trash enclosures, are considered less than significant.
CONSTRUCTION NOISE ANALYSIS
According to the City of Newport Beach Municipal Code Section 10.28.040, construction activities
are considered exempt from the noise standards of the noise ordinance if limited to the hours of
7:00 a.m. to 6:30 p.m. on Mondays to Fridays, and 8:00 a.m. to 6:00 p.m. on Saturdays, with no
activity allowed on Sundays or national holidays. (2) Therefore, if construction activities occur
within the permitted hours of the Municipal Code, Project construction noise levels are
considered exempt from the noise ordinance standards.
Since the City of Newport Beach General Plan and Municipal Code do not identify a specific
construction noise level threshold, a threshold of 85 dBA Leq based on the National Institute for
Occupational Safety and Health (NIOSH) is used to analyze construction noise impacts. With
incorporation of a 16-foot high screening wall during construction, Project-related construction
noise levels at nearby receiver locations, would range from 48 to 59 dBA Leq. Therefore, sensitive
receptors will not be exposed to construction noise levels in excess of 85 dBA Leq. Therefore,
based on the results of this analysis, all nearby sensitive receiver locations will experience less
than significant impacts due to Project construction noise levels. These less than significant
findings are consistent with the 2006 General Plan Environmental Impact Report (EIR) (3):
CONSTRUCTION VIBRATION ANALYSIS
Construction activity can result in varying degrees of ground vibration, depending on the
equipment and methods used, distance to the affected structures and soil type. It is expected
that ground-borne vibration from Project construction activities would cause only intermittent,
localized intrusion. The analysis shows the highest construction vibration levels are expected to
approach 73.8 VdB at residential uses and buildings where people normally sleep, the closest of
which is 69 feet from the site. Although they are intended to primarily apply to residential uses,
the FTA guidelines are applied to all sensitive receptor locations in this report for a conservative
analysis of vibration impacts. The City does not have an established threshold for vibration;
therefore, the Federal Transit Administration’s (“FTA”) threshold of 80 VdB is used in this report
to determine whether vibration would impact nearby sensitive receptors. The highest vibration
levels of 73.8 VdB at the nearest residential sensitive receptor would be less than the FTA’s
guideline threshold of 80 VdB and as such, would result in less than significant impacts. Further,
the vibration levels at the closest sensitive receivers are unlikely to be sustained during the entire
construction period but will occur rather only during the times that heavy construction
equipment is operating adjacent to the Project site perimeter.
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SUMMARY OF CEQA SIGNIFICANCE FINDINGS
The results of this Noise Study Noise Impact Analysis are summarized below based on the
significance criteria in Section 4 of this report and consistent with Appendix G of the California
Environmental Quality Act (CEQA) Guidelines. (1). Table ES-1 shows the findings of significance
for each potential noise and/or vibration impact under CEQA.
TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS
Analysis Report
Section Significance Findings
On-Site Traffic
Noise Levels 7 Less Than Significant
Operational
Noise Levels 9 Less Than Significant
Construction
Noise Levels
10
Less Than Significant
Construction
Vibration Levels Less Than Significant
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1 INTRODUCTION
This noise analysis has been completed to determine the noise impacts associated with the
development of the proposed Noise Study (“Project”). This noise study briefly describes the
proposed Project, provides information regarding noise fundamentals, describes the local
regulatory setting, provides the study methods and procedures for an analysis of the potential
Project-related long-term operational noise and short-term construction noise and vibration
impacts.
1.1 SITE LOCATION
The Project site is in the mariner’s mile near the intersection of West Coast Highway and Tustin
Avenue in the City of Newport Beach, as shown on Exhibit 1-A.
1.2 PROJECT DESCRIPTION
The Project is proposed to consist of a mix of residential, boutique automotive showroom, café,
and medical office use as shown on Exhibit 1-B. The Project will be developed on four levels as
described below:
Level 0: Below Grade Parking for 93 vehicles
Level 1: Boutique Auto Showroom with 7,500 gross square feet of use and a Café with 1,700
gross square feet of use.
Level 2: Multi-family residential with 16 units, medical office with 12,000 gross square feet of
use.
Level 3: Multi-family residential with 16 units.
The combined mixed-use project will provide a total of 36 multi-family residential dwelling units
with 21,200 gross square feet of non-residential uses (boutique auto showroom, café and
medical office).
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EXHIBIT 1-A: LOCATION MAP
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EXHIBIT 1-B: SITE PLAN
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2 FUNDAMENTALS
Noise has been simply defined as "unwanted sound." Sound becomes unwanted when it
interferes with normal activities, when it causes actual physical harm or when it has adverse
effects on health. Noise is measured on a logarithmic scale of sound pressure level known as a
decibel (dB). A-weighted decibels (dBA) approximate the subjective response of the human ear
to broad frequency noise source by discriminating against very low and very high frequencies of
the audible spectrum. They are adjusted to reflect only those frequencies which are audible to
the human ear. Exhibit 2-A presents a summary of the typical noise levels and their subjective
loudness and effects that are described in more detail below.
EXHIBIT 2-A: TYPICAL NOISE LEVELS
2.1 RANGE OF NOISE
Since the range of intensities that the human ear can detect is so large, the scale frequently used
to measure intensity is a scale based on multiples of 10, the logarithmic scale. The scale for
measuring intensity is the decibel scale. Each interval of 10 decibels indicates a sound energy ten
times greater than before, which is perceived by the human ear as being roughly twice as loud.
(4) The most common sounds vary between 40 dBA (very quiet) to 100 dBA (very loud). Normal
conversation at three feet is roughly at 60 dBA, while loud jet engine noises equate to 110 dBA
at approximately 100 feet, which can cause serious discomfort. (5) Another important aspect of
noise is the duration of the sound and the way it is described and distributed in time.
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2.2 NOISE DESCRIPTORS
Environmental noise descriptors are generally based on averages, rather than instantaneous,
noise levels. The most commonly used figure is the equivalent level (Leq). Equivalent sound levels
are not measured directly but are calculated from sound pressure levels typically measured in A-
weighted decibels (dBA). The equivalent sound level (Leq) represents a steady state sound level
containing the same total energy as a time varying signal over a given sample period and is
commonly used to describe the “average” noise levels within the environment.
To describe the time-varying character of environmental noise, the statistical or percentile noise
descriptors L50, L25, L8 and L2, are commonly used. The percentile noise descriptors are the noise
levels equaled or exceeded during 50 percent, 25 percent, 8 percent and 2 percent of a stated
time. Sound levels associated with the L2 and L8 typically describe transient or short-term events,
while levels associated with the L50 describe the steady state (or median) noise conditions. The
City of Newport Beach relies on the percentile noise levels to describe the stationary source noise
level limits. While the L50 describes the noise levels occurring 50 percent of the time, the Leq
accounts for the total energy (average) observed for the entire hour. Therefore, the Leq noise
descriptor is generally 1-2 dBA higher than the L50 noise level.
Peak hour or average noise levels, while useful, do not completely describe a given noise
environment. Noise levels lower than peak hour may be disturbing if they occur during times
when quiet is most desirable, namely evening and nighttime (sleeping) hours. To account for
this, the Community Noise Equivalent Level (CNEL), representing a composite 24-hour noise level
is utilized. The CNEL is the weighted average of the intensity of a sound, with corrections for time
of day, and averaged over 24 hours. The time of day corrections require the addition of 5 decibels
to dBA Leq sound levels in the evening from 7:00 p.m. to 10:00 p.m., and the addition of 10
decibels to dBA Leq sound levels at night between 10:00 p.m. and 7:00 a.m. These additions are
made to account for the noise sensitive time periods during the evening and night hours when
sound appears louder. CNEL does not represent the actual sound level heard at any time, but
rather represents the total sound exposure. The City of Newport Beach relies on the 24-hour
CNEL level to assess land use compatibility with transportation related noise sources.
2.3 SOUND PROPAGATION
When sound propagates over a distance, it changes in level and frequency content. The way noise
reduces with distance depends on the following factors.
2.3.1 GEOMETRIC SPREADING
Sound from a localized source (i.e., a stationary point source) propagates uniformly outward in a
spherical pattern. The sound level attenuates (or decreases) at a rate of 6 dB for each doubling
of distance from a point source. Highways consist of several localized noise sources on a defined
path and hence can be treated as a line source, which approximates the effect of several point
sources. Noise from a line source propagates outward in a cylindrical pattern, often referred to
as cylindrical spreading. Sound levels attenuate at a rate of 3 dB for each doubling of distance
from a line source. (4)
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2.3.2 GROUND ABSORPTION
The propagation path of noise from a highway to a receiver is usually very close to the ground.
Noise attenuation from ground absorption and reflective wave canceling adds to the attenuation
associated with geometric spreading. Traditionally, the excess attenuation has also been
expressed in terms of attenuation per doubling of distance. This approximation is usually
sufficiently accurate for distances of less than 200 ft. For acoustically hard sites (i.e., sites with a
reflective surface between the source and the receiver, such as a parking lot or body of water),
no excess ground attenuation is assumed. For acoustically absorptive or soft sites (i.e., those
sites with an absorptive ground surface between the source and the receiver such as soft dirt,
grass, or scattered bushes and trees), an excess ground attenuation value of 1.5 dB per doubling
of distance is normally assumed. When added to the cylindrical spreading, the excess ground
attenuation results in an overall drop-off rate of 4.5 dB per doubling of distance from a line
source. (6)
2.3.3 ATMOSPHERIC EFFECTS
Receivers located downwind from a source can be exposed to increased noise levels relative to
calm conditions, whereas locations upwind can have lowered noise levels. Sound levels can be
increased at large distances (e.g., more than 500 feet) due to atmospheric temperature inversion
(i.e., increasing temperature with elevation). Other factors such as air temperature, humidity,
and turbulence can also have significant effects. (4)
2.3.4 SHIELDING
A large object or barrier in the path between a noise source and a receiver can substantially
attenuate noise levels at the receiver. The amount of attenuation provided by shielding depends
on the size of the object and the frequency content of the noise source. Shielding by trees and
other such vegetation typically only has an “out of sight, out of mind” effect. That is, the
perception of noise impact tends to decrease when vegetation blocks the line-of-sight to nearby
residents. However, for vegetation to provide a substantial, or even noticeable, noise reduction,
the vegetation area must be at least 15 feet in height, 100 feet wide and dense enough to
completely obstruct the line-of sight between the source and the receiver. This size of vegetation
may provide up to 5 dBA of noise reduction. The FHWA does not consider the planting of
vegetation to be a noise abatement measure. (6)
2.4 NOISE CONTROL
Noise control is the process of obtaining an acceptable noise environment for an observation
point or receiver by controlling the noise source, transmission path, receiver, or all three. This
concept is known as the source-path-receiver concept. In general, noise control measures can
be applied to these three elements.
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2.5 NOISE BARRIER ATTENUATION
Effective noise barriers can reduce noise levels by up to 10 to 15 dBA, cutting the loudness of
traffic noise in half. A noise barrier is most effective when placed close to the noise source or
receiver. Noise barriers, however, do have limitations. For a noise barrier to work, it must be
high enough and long enough to block the path of the noise source. (6)
2.6 LAND USE COMPATIBILITY WITH NOISE
Some land uses are more tolerant of noise than others. For example, schools, hospitals,
churches, and residences are more sensitive to noise intrusion than are commercial or industrial
developments and related activities. As ambient noise levels affect the perceived amenity or
livability of a development, so too can the mismanagement of noise impacts impair the economic
health and growth potential of a community by reducing the area’s desirability as a place to live,
shop and work. For this reason, land use compatibility with the noise environment is an
important consideration in the planning and design process. The FHWA encourages State and
Local government to regulate land development in such a way that developments are planned,
designed, and constructed in such a way that noise impacts to sensitive land uses are minimized.
(7)
2.7 COMMUNITY RESPONSE TO NOISE
Community responses to noise may range from registering a complaint by telephone or letter, to
initiating court action, depending upon everyone’s susceptibility to noise and personal attitudes
about noise. Several factors are related to the level of community annoyance including:
• Fear associated with noise producing activities;
• Socio-economic status and educational level;
• Perception that those affected are being unfairly treated;
• Attitudes regarding the usefulness of the noise-producing activity;
• Belief that the noise source can be controlled.
Approximately ten percent of the population has a very low tolerance for noise and will object to
any noise not of their making. Consequently, even in the quietest environment, some complaints
will occur. Another twenty-five percent of the population will not complain even in very severe
noise environments. Thus, a variety of reactions can be expected from people exposed to any
given noise environment. (8) Surveys have shown that about ten percent of the people exposed
to traffic noise of 60 dBA will report being highly annoyed with the noise, and each increase of
one dBA is associated with approximately two percent more people being highly annoyed. When
traffic noise exceeds 60 dBA or aircraft noise exceeds 55 dBA, people may begin to complain. (8)
Despite this variability in behavior on an individual level, the population can generally be
expected to exhibit the following responses to changes in noise levels as shown on Exhibit 2-B.
A change of 3 dBA are considered barely perceptible, and changes of 5 dBA are considered readily
perceptible. (6)
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EXHIBIT 2-B: NOISE LEVEL INCREASE PERCEPTION
2.8 VIBRATION
Per the Federal Transit Administration (FTA) Transit Noise Impact and Vibration Assessment (9),
vibration is the periodic oscillation of a medium or object. The rumbling sound caused by the
vibration of room surfaces is called structure-borne noise. Sources of ground-borne vibrations
include natural phenomena (e.g., earthquakes, volcanic eruptions, sea waves, landslides) or
human-made causes (e.g., explosions, machinery, traffic, trains, construction equipment).
Vibration sources may be continuous, such as factory machinery, or transient, such as explosions.
As is the case with airborne sound, ground-borne vibrations may be described by amplitude and
frequency.
There are several different methods that are used to quantify vibration. The peak particle
velocity (PPV) is defined as the maximum instantaneous peak of the vibration signal. The PPV is
most frequently used to describe vibration impacts to buildings but is not always suitable for
evaluating human response (annoyance) because it takes some time for the human body to
respond to vibration signals. Instead, the human body responds to average vibration amplitude
often described as the root mean square (RMS). The RMS amplitude is defined as the average of
the squared amplitude of the signal and is most frequently used to describe the effect of vibration
on the human body. Decibel notation (VdB) is commonly used to measure RMS. Decibel notation
(VdB) serves to reduce the range of numbers used to describe human response to vibration.
Typically, ground-borne vibration generated by man-made activities attenuates rapidly with
distance from the source of the vibration. Sensitive receivers for vibration include structures
(especially older masonry structures), people (especially residents, children, the elderly, and
sick), vibration-sensitive equipment and/or activities.
The background vibration-velocity level in residential areas is generally 50 VdB. Ground-borne
vibration is normally perceptible to humans at approximately 65 VdB. For most people, a
vibration-velocity level of 75 VdB is the approximate dividing line between barely perceptible and
distinctly perceptible levels. Typical outdoor sources of perceptible ground-borne vibration are
construction equipment, steel-wheeled trains, and traffic on rough roads. If a roadway is smooth,
the ground-borne vibration is rarely perceptible. The range of interest is from approximately 50
VdB, which is the typical background vibration-velocity level, to 100 VdB, which is the general
threshold where minor damage can occur in fragile buildings. Exhibit 2-C illustrates common
vibration sources and the human and structural response to ground-borne vibration.
0 1 2 3 4 5 6 7 8 9 10
Just Perceptible
Barely Perceptible
Readily Perceptible
Twice as Loud
Noise Level Increase (dBA)
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EXHIBIT 2-C: TYPICAL LEVELS OF GROUND-BORNE VIBRATION
Source: Federal Transit Administration (FTA) Transit Noise Impact and Vibration Assessment.
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3 REGULATORY SETTING
To limit population exposure to physically and/or psychologically damaging as well as intrusive
noise levels, the federal government, the State of California, various City governments, and most
municipalities in the state have established standards and ordinances to control noise. In most
areas, automobile and truck traffic is the major source of environmental noise. Traffic activity
generally produces an average sound level that remains constant with time. Air and rail traffic,
and commercial and industrial activities are also major sources of noise in some areas. Federal,
state, and local agencies regulate different aspects of environmental noise. Federal and state
agencies generally set noise standards for mobile sources such as aircraft and motor vehicles,
while regulation of stationary sources is generally established by local agencies.
3.1 STATE OF CALIFORNIA NOISE REQUIREMENTS
The State of California regulates freeway noise, sets standards for sound transmission, provides
occupational noise control criteria, identifies noise standards, and provides guidance for local
land use compatibility. State law requires that each City and County adopt a General Plan that
includes a Noise Element which is to be prepared per guidelines adopted by the Governor’s Office
of Planning and Research (OPR). (10) The purpose of the Noise Element is to limit the exposure
of the community to excessive noise levels. In addition, the California Environmental Quality Act
(CEQA) requires that all known environmental effects of a project be analyzed, including
environmental noise impacts.
3.2 STATE OF CALIFORNIA BUILDING CODE
The State of California’s noise insulation standards are codified in the California Code of
Regulations, Title 24, Building Standards Administrative Code, Part 2, and the California Building
Code. These noise standards are applied to new construction in California for the purpose of
controlling interior noise levels resulting from exterior noise sources. The regulations specify that
acoustical studies must be prepared when noise-sensitive structures, such as residential
buildings, schools, or hospitals, are developed near major transportation noise sources, and
where such noise sources create an exterior noise level of 60 dBA CNEL or higher. Acoustical
studies that accompany building plans for noise-sensitive land uses must demonstrate that the
structure has been designed to limit interior noise in habitable rooms to acceptable noise levels.
For new residential buildings, schools, and hospitals, the acceptable interior noise limit for new
construction is 45 dBA CNEL.
3.3 CITY OF NEWPORT BEACH GENERAL PLAN NOISE ELEMENT
The City of Newport Beach has adopted a Noise Element of the General Plan to control noise in
the planning process in order to maintain compatible land use with environmental noise levels
and to ensure that Newport Beach residents will be protected from excessive noise intrusion.
(11)
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3.3.1 NOISE POLICIES
To protect City of Newport Beach residents from excessive noise, the Noise Element contains the
following policies related to the Project:
N 1.1 Noise Compatibility of New Development: Require that all proposed projects are
compatible with the noise environment through use of Table N2 and enforce the interior
and exterior noise standards shown in Table N3.
N 1.6 Mixed-Use Developments: Encourage new mixed-use developments to site loading areas,
parking lots, driveways, trash enclosures, mechanical equipment, and other noise sources
away from the residential portion of the development.
N 1.8 Significant Noise Impacts: Require the employment of noise mitigation measures for
existing sensitive uses when a significant noise impact is identified. A significant noise
impact occurs when there is an increase in the ambient CNEL produced by new
development impacting existing sensitive uses. The CNEL increase is shown in the table
below.
CNEL (dBA) dBA increase
55 3
60 2
65 1
70 1
Over 75 Any increase is considered significant
N 2.1 New Development: Require that proposed noise-sensitive uses in areas of 60 dBA and
greater, as determined the analyses stipulated by Policy N1.1, demonstrate that they meet
interior and exterior noise levels.
N 2.2 Design of Sensitive Land Uses: Require the use of walls, berms, interior noise insulation,
double paned windows, or other noise mitigation measures, as appropriate, in the design
of new residential or other new noise sensitive land uses that are adjacent to major roads.
Application of the Noise Standards in Table N3 shall govern this requirement.
N 4.1 Stationary Noise Sources: Enforce interior and exterior noise standards outlined in Table
N3, and in the City’s Municipal Code to ensure that sensitive noise receptors are not
exposed to excessive noise levels from stationary noise sources, such as heating,
ventilation, and air conditioning equipment.
N 4.3 New Commercial Developments: Require that new commercial developments abutting
residentially designated properties be designed to minimize noise impacts generated by
loading areas, parking lots, trash enclosures, mechanical equipment, and any other noise
generating features specific to the development to the extent feasible.
N 4.6 Maintenance or Construction Activities: Enforce the Noise Ordinance noise limits and
limits on hours of maintenance or construction activity in or adjacent to residential areas,
including noise that results from in-home hobby or work-related activities.
N 5.1 Limiting Hours of Activity: Enforce the limits on hours of construction activity.
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3.3.2 LAND USE COMPATIBILITY
The noise criteria identified in the City of Newport Beach Noise Element (Table N2) are guidelines
to evaluate the land use compatibility of transportation related noise. The compatibility criteria,
shown on Exhibit 3-A, provides the City with a planning tool to gauge the compatibility of land
uses relative to existing and future exterior noise levels and prevent noise/land use conflicts. The
Land Use Noise Compatibility Matrix in the City of Newport Beach General Plan provides
guidelines to evaluate the acceptability of transportation-related noise level impacts.
EXHIBIT 3-A: LAND USE NOISE COMPATIBILITY MATRIX
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The Project’s residential (mixed use), are considered clearly compatible with exterior noise levels
below 65 dBA CNEL. A review of the existing ambient noise level measurements included in
Section 5 of this report shows that the Project site is clearly compatible for residential mixed-use.
For the planned non-residential Auto Showroom and Medical Office uses, exterior noise levels
up to 65 dBA CNEL are considered by the City to be clearly compatible and exterior noise levels
approaching 75 dBA CNEL are considered by the City to be normally compatible. For normally
compatible uses, new construction or development should be undertaken only after detailed
analysis of the noise reduction requirements are made and needed noise insulation feature in
the design are determined. Conventional construction, with closed windows and fresh air supply
systems or air conditioning, will normally suffice.
3.4 CITY OF NEWPORT BEACH STATIONARY (NON-TRANSPORTATION) NOISE STANDARDS
In addition to the noise/land use compatibility guidelines contained in the General Plan Noise
Element, the City of Newport Beach has adopted Community Noise Control policies and
standards as part of its Municipal Code in order to limit unnecessary, excessive and annoying
noise in the City. To analyze noise impacts originating from a designated fixed location or private
property such as the Noise Study Project, stationary-source noise such as the expected roof-top
air conditioning units, parking lot vehicle movements, and trash enclosures and noise from
construction activities are typically evaluated against standards established under the City’s
Municipal Code.
3.4.1 OPERATIONAL NOISE STANDARDS
The City of Newport Beach Municipal Code, Chapter 10.26 Community Noise Control, establishes
the permissible exterior noise levels that may intrude into a neighboring property. According to
Section 10.26.025(A) exterior noise levels at single-family residential land uses (Noise Zone 1)
shall not exceed 55 dBA Leq during the daytime hours (7:00 a.m. to 10:00 p.m.) and 50 dBA Leq
during the nighttime hours (10:00 p.m. to 7:00 a.m.). (12) For commercial uses, exterior noise
levels shall not exceed 65 dBA Leq during the daytime hours (7:00 a.m. to 10:00 p.m.) and 60 dBA
Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.). According to Section 10.26.025(C), in
the event the ambient noise level exceeds the noise standard, the maximum allowable noise level
under said category shall be increased to reflect he maximum ambi ent noise level. The City of
Newport Beach Municipal Code, Chapter10.26 Community Noise Control exterior noise level
standards are shown on Table 3-1 and are included in Appendix 3.1.
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TABLE 3-1: OPERATIONAL NOISE STANDARDS
City Land
Use
Time
Period
Base Exterior Noise
Level Standards
(dBA Leq)2
Newport
Beach1
Residential
(Noise Zone I)
Daytime 55
Nighttime 50
Commercial
(Noise Zone II)
Daytime 65
Nighttime 60
1 Source: City of Newport Beach Municipal Code, Section 10.26.025 (Appendix 3.1).
2 Base exterior noise level standards. If the ambient level exceeds allowable exterior Leq noise level, the ambient shall be the
standard per Section 10.26.025 (C) of the City of Newport Beach Municipal Code.
"Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.
3.4.2 CONSTRUCTION NOISE STANDARDS
The City of Newport Beach has set restrictions to control noise impacts associated with the
construction of the proposed Project. According to the City of Newport Beach Municipal Code
Section 10.28.040 (included in Appendix 3.2), construction activities are considered exempt from
the noise standards of the noise ordinance if limited to the hours of 7:00 a.m. to 6:30 p.m. on
Mondays to Fridays, and 8:00 a.m. to 6:00 p.m. on Saturdays, with no activity allowed on Sundays
or national holidays. (2) Therefore, if construction activities occur within the permitted hours of
the Municipal Code, Project construction noise levels are considered exempt from the noise
ordinance standards. Table 3-2 shows the construction noise standards of the City of Newport
Beach Municipal Code.
TABLE 3-2: CONSTRUCTION NOISE STANDARDS
City Permitted Hours of
Construction Activity
Newport Beach1
7:00 a.m. to 6:30 p.m. Mondays to Fridays;
8:00 a.m. to 6:00 p.m. on Saturdays;
no activity on Sundays or national holidays
1 Source: City of Newport Beach Municipal Code, Section 10.28.040 (Appendix 3.1).
3.4.3 OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION CONSTRUCTION NOISE STANDARDS
The National Institute for Occupational Safety and Health (NIOSH) provides noise standards to
evaluate required hearing protection for employees that may be exposed to high noise levels.
However, the standards are a useful metric for analyzing the significance of construction noise
and are therefore used in this report to determine whether construction impacts would impact
nearby sensitive receptors.
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NIOSH identifies 85 dBA Leq as an acceptable noise exposure level over an 8-hour period. (13)
Since the NIOSH construction-related noise level represents the energy average of the noise
source over a given time period, they are expressed as Leq noise levels.
3.5 CONSTRUCTION VIBRATION STANDARDS
Construction activity can result in varying degrees of ground-borne vibration, depending on the
equipment and methods used, distance to the affected structures and soil type. (9) Construction
vibration is generally associated with pile driving and rock blasting. Other construction
equipment such as air compressors, light trucks, hydraulic loaders, etc., generates little or no
ground vibration. (9) Occasionally large bulldozers and loaded trucks can cause perceptible
vibration levels at close proximity.
The City of Newport Beach has not identified or adopted vibration standards. However, the 2006
General Plan Environmental Impact Report (EIR) (3) identified a limit of 72 VdB for frequent
events (more than 70 vibrations events per day) at residential uses and buildings where people
normally sleep. (9) For infrequent events with fewer than 70 vibration events per day, the
vibration limit is 80 VdB. These limits were derived from the FTA guidelines (9) for determining
the relative significance of potential Project vibration impacts due to on-site construction
activities as shown on Table 3-3.
TABLE 3-3 CONSTRUCTION VIBRATION STANDARDS
Vibration Criteria Vibration Decibels (VdB)
at 25 feet1
2006 GP EIR - Human Annoyance (Residential)1 72
FTA - Human Annoyance (Residential Daytime)2 78
FTA - Human Annoyance (Residential Nighttime)2 72
FTA - Human Annoyance (Office)2 84
1 City of Newport Beach General Plan EIR
2 Federal Transit Administration, Transit Noise and Vibration Impact Assessment, September 2018.
It should be noted that the EIR conservatively identified a residential-nighttime threshold of 72
VdB for all circumstances of vibrational energy; including for construction activities which would
almost never be expected to occur during the nighttime period (10pm to 7am). The FTA has
established vibration criteria of 72 VbB for Residential-Nighttime land use, when no construction
activities would be allowed per City of Newport Beach Code Section 10.28.040. The FTA criteria
for Residential-Daytime land use is 78 VdB, which would be more applicable to the daytime
construction activities. Based on the FTA interpretation for Residential-Daytime use, at 78 VdB
Vibration is barely felt.
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4 SIGNIFICANCE CRITERIA
The following significance criteria are based on currently adopted guidance provided by Appendix
G of the California Environmental Quality Act (CEQA) Guidelines. (1) For the purposes of this
report, impacts would be potentially significant if the Project results in or causes:
A. Generation of a substantial temporary or permanent increase in ambient noise levels in the
vicinity of the project in excess of standards established in the local general plan or noise
ordinance, or applicable standards of other agencies?
B. Generation of excessive ground-borne vibration or ground-borne noise levels?
C. For a project located within the vicinity of a private airstrip or 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?
While the City of Newport Beach General Plan Guidelines provide direction on noise compatibility
and establish noise standards by land use type that are sufficient to assess the significance of
noise impacts, they do not define the levels at which increases are considered substantial for use
under Guideline A. CEQA Appendix G Guideline C applies to nearby public and private airport s,
if any, and the Project’s land use compatibility.
4.1 AIRPORT NOISE
The Project site is located roughly 14 miles southeast of John Wayne Airport. Therefore, the
Project site is not located within two miles of a public airport or the vicinity of a private airstrip,
and as such, no impact related to the exposure of people residing or working in the Project area
to excessive airport related noise levels is anticipated.
4.2 SIGNIFICANCE CRITERIA FOR CONSTRUCTION NOISE AND VIBRATION
The Project’s construction noise and vibration impacts are significant if:
• If Project-related construction activities create noise levels which exceed 85 dBA Leq at nearby
sensitive receiver locations (NIOSH, Criteria for Recommended Standard: Occupational Noise
Exposure).
• If short-term Project generated construction vibration levels exceed the FTA’s vibration threshold
of 78 VdB at residential daytime use. (9)
4.3 SIGNIFICANCE CRITERIA FOR OPERATION
The Project’s operational noise impacts are significant if:
• If Project-related operational (stationary-source) noise levels exceed the exterior noise level
standards at the land uses identified in Table 3-1 (City of Newport Beach Municipal Code, Section
10.26.025); ), or exceed the City’s exterior noise level standards in Table 3-1 at the nearby daycare
use;
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• If the existing ambient noise levels at the noise-sensitive receivers near the Project site:
o are less than 55 dBA CNEL and the Project creates a barely perceptible 3 dBA CNEL or
greater Project-related noise level increase; or
o range from 55 to 60 dBA CNEL and the Project creates a 2 dBA CNEL or greater Project-
related noise level increase; or
o range from 60 to 75 dBA CNEL and the Project creates a 1 dBA CNEL or greater Project-
related noise level increase; or
o already exceed 75 dBA CNEL, and the Project create any noise level increase.
4.3 SIGNIFICANCE CRITERIA SUMMARY
Noise impacts shall be considered significant if any of the following occur as a direct result of the
proposed development. Table 4-2 shows the significance criteria summary matrix.
TABLE 4-2: SIGNIFICANCE CRITERIA SUMMARY MATRIX
Analysis Receiving
Land Use Condition(s)
Significance Criteria
Daytime Nighttime
On-Site
Traffic Noise1 Exterior Noise Compatibility Criteria 65 dBA CNEL
Interior Noise Level Standard 45 dBA CNEL
Operational
Noise
Multiple2 Exterior Noise Level Standards See Table 3-1.
Noise-
Sensitive3
If ambient is < 55 dBA CNEL ≥ 3 dBA CNEL Project Increase
If ambient is 55 - 60 dBA CNEL ≥ 2 dBA CNEL Project Increase
If ambient is 60 - 75 dBA CNEL ≥ 1 dBA CNEL Project Increase
If ambient is > 75 dBA CNEL Any Project Increase
Construction
All4 Noise Level Threshold 85 dBA Leq n/a
Residential5 Vibration Level Threshold 78 VdB n/a
1 City of Newport Beach General Plan Noise Element Land Use Noise Compatibility Matrix (Table N2).
2 City of Newport Beach Municipal Code, Section 10.26.025 (Appendix 3.1).
3 City of Newport Beach General Plan Policy N 1.8
4 NIOSH, Criteria for Recommended Standard: Occupational Noise Exposure and Federal Transit Administration,
Transit Noise and Vibration Impact Assessment.
5 Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment, September 2018
"Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.;
"n/a" = No nighttime construction activity is permitted, so no nighttime construction noise level limits are identified; "VdB" = Vibration
Decibels
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5 EXISTING NOISE LEVEL MEASUREMENTS
To assess the existing noise level environment, five 24-hour noise level measurements were
taken at sensitive receiver locations in the Project study area on Wednesday, October 2, 2019.
The receiver locations were selected to describe and document the existing noise environment
within the Project study area. Exhibit 5-A provides the boundaries of the Project study area and
the noise level measurement locations. Appendix 5.1 includes study area photos.
5.1 MEASUREMENT PROCEDURE AND CRITERIA
To describe the existing noise environment, the hourly noise levels were measured during typical
weekday conditions over a 24-hour period. By collecting individual hourly noise level
measurements, it is possible to describe the daytime and nighttime hourly noise levels and
calculate the 24-hour CNEL. The long-term noise readings were recorded using Piccolo Type 2
integrating sound level meter and dataloggers. The Piccolo sound level meters were calibrated
using a Larson-Davis calibrator, Model CAL 150. All noise meters were programmed in "slow"
mode to record noise levels in "A" weighted form. The sound level meters and microphones
were equipped with a windscreen during all measurements. All noise level measurement
equipment satisfies the American National Standards Institute (ANSI) standard specifications for
sound level meters ANSI S1.4-2014/IEC 61672-1:2013. (14)
5.2 NOISE MEASUREMENT LOCATIONS
The long-term noise level measurements were positioned as close to the nearest sensitive
receiver locations as possible to assess the existing ambient hourly noise levels surrounding the
Project site. Both Caltrans and the FTA recognize that it is not reasonable to collect noise level
measurements that can fully represent every part of a private yard, patio, deck, or balcony
normally used for human activity when estimating impacts for new development projects. This
is demonstrated in the Caltrans general site location guidelines which indicate that, sites must be
free of noise contamination by sources other than sources of interest. Avoid sites located near
sources such as barking dogs, lawnmowers, pool pumps, and air conditioners unless it is the
express intent of the analyst to measure these sources. (4) Further, FTA guidance states, that it
is not necessary nor recommended that existing noise exposure be determined by measuring at
every noise-sensitive location in the project area. Rather, the recommended approach is to
characterize the noise environment for clusters of sites based on measurements or estimates at
representative locations in the community. (9)
Based on recommendations of Caltrans and the FTA, it is not necessary to collect measurements
at each individual building or residence, because each receiver measurement represents a group
of buildings that share acoustical equivalence. (9) In other words, the area represented by the
receiver shares similar shielding, terrain, and geometric relationship to the reference noise
source. Receivers represent a location of noise sensitive areas and are used to estimate the
future noise level impacts. Collecting reference ambient noise level measurements at the nearby
sensitive receiver locations allows for a comparison of the before and after Proje ct noise levels
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and is necessary to assess potential noise impacts due to the Project’s contribution to the
ambient noise levels.
5.3 NOISE MEASUREMENT RESULTS
The noise measurements presented below focus on the average or equivalent sound levels (Leq).
The equivalent sound level (Leq) represents a steady state sound level containing the same total
energy as a time varying signal over a given sample period. Table 5-1 identifies the hourly
daytime (7:00 a.m. to 10:00 p.m.) and nighttime (10:00 p.m. to 7:00 a.m.) noise levels at each
noise level measurement location. Appendix 5.2 provides a summary of the existing hourly
ambient noise levels described below:
• Location L1 represents the noise levels south of 204 Tustin Ave near the side yard of the single-
family home. The noise level measurements collected show an overall 24-hour exterior noise
level of 63.5 dBA CNEL. The energy (logarithmic) average daytime noise level was calculated at
59.9 dBA Leq with an average nighttime noise level of 56.0 dBA Leq.
• Location L2 represents the noise levels near the parking meters in the parking lot adjacent to 124
Tustin Avenue. The noise level measurements collected show an overall 24-hour exterior noise
level of 59.2 dBA CNEL. The energy (logarithmic) average daytime noise level was calculated at
57.3 dBA Leq with an average nighttime noise level of 50.6 dBA Leq.
• Location L3 represents the noise levels in the parking lot South of Newport Theatre Arts Center.
The 24-hour CNEL indicates that the overall exterior noise level is 55.4 dBA CNEL. The energy
(logarithmic) average daytime noise level was calculated at 53.6 dBA Leq with an average nighttime
noise level of 46.8 dBA Leq.
• Location L4 represents the noise levels in parking lot north of 2400 West Coast Highway and west
of Avon Lot 2. The noise level measurements collected show an overall 24-hour exterior noise
level of 62.4 dBA CNEL. The energy (logarithmic) average daytime noise level was calculated at
59.3 dBA Leq with an average nighttime noise level of 54.6 dBA Leq.
• Location L5 represents the noise levels in the courtyard of 124 Tustin Avenue. The noise level
measurements collected show an overall 24-hour exterior noise level of 54.6 dBA CNEL. The
energy (logarithmic) average daytime noise level was calculated at 52.0 dBA Leq with an average
nighttime noise level of 46.6 dBA Leq.
Table 5-1 provides the (energy average) noise levels used to describe the daytime and nighttime
ambient conditions. These daytime and nighttime energy average noise levels represent the
average of all hourly noise levels observed during these time periods expressed as a single
number. Appendix 5.2 provides summary worksheets of the noise levels for each hour as well as
the minimum, maximum, L1, L2, L5, L8, L25, L50, L90, L95, and L99 percentile noise levels observed
during the daytime and nighttime periods.
The background ambient noise levels in the Project study area are dominated by the
transportation-related noise associated with West Coast Highway. The 24-hour existing noise
level measurements shown on Table 5-1 present the existing ambient noise conditions.
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TABLE 5-1: 24-HOUR AMBIENT NOISE LEVEL MEASUREMENTS
Location1 Description
Energy Average
Noise Level
(dBA Leq)2 CNEL
Daytime Nighttime
L1 Located south of 204 Tustin Avenue near
the side yard of the single-family home. 59.9 56.0 63.5
L2
Located near the parking meters in the
parking lot adjacent to 124 Tustin
Avenue.
57.3 50.6 59.2
L3 Located in the parking lot South of
Newport Theatre Arts Center. 53.6 46.8 55.4
L4 Located in parking lot north of 2400 West
Coast Highway and west of Avon Lot 2 59.3 54.6 62.4
L5 Located in courtyard of 124 Tustin
Avenue. 52.0 46.6 54.6
1 See Exhibit 5-A for the noise level measurement locations.
2 The long-term 24-hour measurement printouts are included in Appendix 5.2.
"Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.
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EXHIBIT 5-A: NOISE MEASUREMENT LOCATIONS
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6 METHODS AND PROCEDURES
The following section outlines the methods and procedures used to model and analyze the future
traffic noise environment.
6.1 FHWA TRAFFIC NOISE PREDICTION MODEL
The expected roadway noise level increases from vehicular traffic were calculated by Urban
Crossroads, Inc. using a computer program that replicates the Federal Highway Administration
(FHWA) Traffic Noise Prediction Model- FHWA-RD-77-108. (15) This is consistent with the
approach used for the City of Newport Beach General Plan Update EIR. (3) The FHWA Model
arrives at a predicted noise level through a series of adjustments to the Reference Energy Mean
Emission Level (REMEL). In California the national REMELs are substituted with the California
Vehicle Noise (Calveno) Emission Levels. (16) Adjustments are then made to the REMEL to
account for: the roadway classification (e.g., collector, secondary, major or arterial), the roadway
active width (i.e., the distance between the center of the outermost travel lanes on each side of
the roadway), the total average daily traffic (ADT), the travel speed, the percentages of
automobiles, medium trucks, and heavy trucks in the traffic volume, the roadway grade, the
angle of view (e.g., whether the roadway view is blocked), the site conditions ("hard" or "soft"
relates to the absorption of the ground, pavement, or landscaping), and the percentage of total
ADT which flows each hour throughout a 24-hour period. Research conducted by Caltrans has
shown that the use of soft site conditions is appropriate for the application of the FHWA traffic
noise prediction model used in this analysis. (17)
6.2 ON-SITE TRAFFIC NOISE PREDICTION MODEL INPUTS
The on-site roadway parameters including the average daily traffic (ADT) volumes used for this
study are presented on Table 6-1. Based on the City of Newport Beach General Plan Circulation
Element, West Coast Highway is classified as a Major Road. (18) To predict the future on-site
noise environment at the Project site, parameters including the number of lanes and the future
buildout average daily traffic volumes were obtained from the City of Newport Beach General
Plan Update Environmental Impact Report, Figure 4.13-8.
For the purposes of this analysis, soft site conditions were used to analyze the on-site traffic noise
impacts for the Project study area. Soft site conditions account for the sound propagation loss
over natural surfaces such as normal earth and ground vegetation. Research by Caltrans has
shown that the use of soft site conditions is appropriate for the application of the FHWA traffic
noise prediction model used in this analysis. (17)
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TABLE 6-1: ON-SITE ROADWAY PARAMETERS
Roadway Lanes Classification1 Average Daily
Traffic Volume2
Speed
(mph)3
Site
Conditions
W. Coast Hwy. 5 Major 51,000 40 Soft
Tustin Ave. 2 Collector 3,000 25 Soft
1 City of Newport Beach General Plan Figure CE1 Master Plan of Streets and Highways
2 City of Newport Beach General Plan Update EIR Figure 4.13-8 General Plan Buildout with Project ADT.
3 Posted speed limit.
The site plan is used to identify the relationship between the roadway centerline elevation, the
pad elevation and the centerline distance to any intervening noise barriers, and the building
façade. The exterior noise level receiver locations were placed five feet above the finished floor
elevation for each floor.
Table 6-2 presents the time of day vehicle splits and Table 6-3 presents the traffic flow
distributions (vehicle mix) used for this analysis. The vehicle mix provides the hourly distribution
percentages of automobile, medium trucks, and heavy trucks for input into the FHWA noise
prediction model.
TABLE 6-2: TIME OF DAY VEHICLE SPLITS
Vehicle Type
Time of Day Splits1 Total of Time of
Day Splits Daytime Evening Nighttime
Autos 77.50% 12.90% 9.60% 100.00%
Medium Trucks 84.80% 4.90% 10.30% 100.00%
Heavy Trucks 86.50% 2.70% 10.80% 100.00%
1 Source: Typical Southern California vehicle mix.
"Daytime" = 7:00 a.m. to 7:00 p.m.; "Evening" = 7:00 p.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.
TABLE 6-3: DISTRIBUTION OF TRAFFIC FLOW BY VEHICLE TYPE (VEHICLE MIX)
Classification
Total % Traffic Flow
Total
Autos Medium Trucks Heavy Trucks
All Roadways1 97.42% 1.84% 0.74% 100.00%
1 Source: Typical Southern California vehicle mix.
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7 ON-SITE NOISE IMPACTS FROM TRAFFIC
An on-site exterior noise impact analysis has been completed to determine the traffic noise
exposure and to identify potential necessary noise abatement measures for the proposed Noise
Study Project. The primary source of traffic noise affecting the Project site is anticipated to be
from West Coast Highway and Tustin Avenue. The Project will also experience some background
traffic noise impacts from nearby drive aisles and parking lots, however, due to the low traffic
volumes, distance and intervening structures these are not anticipated to make a significant
contribution to the exterior noise levels at the Project site.
7.1 EXTERIOR NOISE ANALYSIS
The analysis shows that the future on-site exterior traffic noise levels are expected to approach
71.8 dBA CNEL at the first floor Auto Showroom and 71.7 dBA CNEL at the second floor Medical
Office building façade facing West Coast Highway. This is below the City of Newport Beach’s 75
dBA CNEL normally compatible exterior land use compatibility criteria non-residential uses .
A review of the Project elevations show that the second residential dwelling units are largely
blocked from West Coast Highway by the Medical Office space. However, the third-floor
residential dwelling units will be exposed to the traffic noise from West Coast Highway. As shown
on Table 8-1 the residential dwelling units are expected to experience an exterior noise level of
64.0 dBA CNEL at the third-floor building façade. This satisfies the City of Newport Beach’s 65
dBA CNEL clearly compatible exterior land use compatibility criteria for residential use.
Therefore, future exterior traffic noise impacts will be less than significant. Appendix 7.1 includes
the on-site traffic noise level calculations.
TABLE 7-1: EXTERIOR TRAFFIC NOISE LEVELS
Land Use1 Roadways Level
Noise Level
at Facade
(dBA CNEL)
Combined
Exterior
Noise Level
(dBA CNEL)2
Exterior
Noise Level
Threshold
(dBA CNEL)3
Threshold
Exceeded?
Auto Showroom W. Coast Hwy. 1st
Floor
71.8 71.8 75 No Tustin Ave. 50.9
Medical Office W. Coast Hwy. 2nd
Floor
71.7 71.7 75 No Tustin Ave. 50.9
Residential W. Coast Hwy. 3rd
Floor
64.0 64.0 65 No
Tustin Ave. 50.1
1 As shown on the Project site plan (Exhibit 1-B)
2 Combined future exterior noise levels at the building façade. Calculations are included in Appendix 7-1.
3 City of Newport Beach Land Use Noise Compatibility Thresholds Table N2 (Exhibit 3-A).
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7.2 INTERIOR NOISE ANALYSIS
To ensure that the interior noise levels comply with the City of Newport Beach 45 dBA CNEL
interior noise level standards, future noise levels were calculated at the building façades. While
the City maintains interior noise standards for noise sensitive residential land uses, the City does
not prescribe specific interior noise requirements for non-residential land uses such as the
planned Auto Showroom and Medical Office uses.
Table 7-2 shows that the future exterior noise levels at the third-floor residential building façade
are estimated at 64.0 dBA CNEL. Table 7-2 shows that the estimated interior noise levels using
typical building construction and standard windows will provide an interior noise level reduction
of 25 dBA. With the standard windows, units facing West Coast Highway will experience interior
levels of 39.0 dBA CNEL. This satisfies the City of Newport Beach 45 dBA CNEL interior noise level
standards and is less than significant.
TABLE 7-2: INTERIOR NOISE LEVELS (CNEL)
Building
(Façade) Floor
Noise
Level
at Façade1
Required
Interior
NR2
Typical
Interior
NR3
Interior
Noise
Level
Threshold Threshold
Exceeded?
Residential 3 64.0 19.0 25.0 39.0 45 No
1 Exterior noise level at the facade with a windows closed condition requiring a means of mechanical ventilation (e.g. air conditioning).
2 Noise reduction required to satisfy the 45 dBA CNEL interior noise standard for residential uses.
3 Typical building construction interior noise reduction with the standard windows .
"NR" = Noise Reduction
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8 SENSITIVE RECEIVER LOCATIONS
To assess the potential for long-term operational and short-term construction noise impacts, the
following sensitive receiver locations as shown on Exhibit 9-A were identified as representative
locations for analysis. Sensitive receivers are generally defined as locations where people reside
or where the presence of unwanted sound could otherwise adversely affect the use of the land.
Noise-sensitive land uses are generally considered to include schools, hospitals, single-family
dwellings, mobile home parks, churches, libraries, and recreation areas. Moderately noise-
sensitive land uses typically include multi-family dwellings, hotels, motels, dormitories, out-
patient clinics, cemeteries, golf courses, country clubs, athletic/tennis clubs, and equestrian
clubs. Land uses that are considered relatively insensitive to noise include business, commercial,
and professional developments. Land uses that are typically not affected by noise include:
industrial, manufacturing, utilities, agriculture, undeveloped land, parking lots, warehousing,
liquid and solid waste facilities, salvage yards, and transit terminals.
The closest sensitive receivers to the Project site are described below. Other sensitive land uses
in the Project study area that are located at greater distances than those identified in this noise
study will experience lower noise levels than those presented in this report due to the additional
attenuation from distance and the shielding of intervening structures.
R1: Located approximately 83 feet north of the Project site, R1 represents an existing single-
family residential home located at 204 Tustin Avenue. A 24-hour noise level
measurement was taken near this location, L1, to describe the existing ambient noise
environment.
R2: Location R2 represents the location 59 feet north of the Site roughly 47 feet above the
pad elevation of the Project at 124 Tustin Avenue. A 24-hour noise level measurement
was taken near this location, L2, to describe the existing ambient noise environment.
R3: Located approximately 204 feet north of the Project site, R3 represents the Newport
Theatre Arts Center. A 24-hour noise level measurement was taken near this location, L3,
to describe the existing ambient noise environment.
R4: Location R4 represents the existing outdoor play area for the nearby Bright Horizons
daycare facility 2500 West Coast Highway located approximately 25 feet east of the
Project site boundary. Because Bright Horizons daycare facility was inaccessible, a 24-
hour noise level measurement was taken near this location, L4 in a location that
represents a similar existing ambient noise environment, to describe the existing ambient
noise environment at R4.
R5: Located approximately 54 feet west of the Project site, R5 represents the existing
commercial retail uses that share a common courtyard area at 124 Tustin Avenue. A 24-
hour noise level measurement was taken near this location, L5, to describe the existing
ambient noise environment.
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EXHIBIT 8-A: RECEIVER LOCATIONS
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9 OPERATIONAL NOISE IMPACTS TO NEARBY SENSITIVE RECEIVERS
This section analyzes the potential stationary-source operational noise impacts at the nearby
receiver locations, identified in Section 8, resulting from the operation of the proposed Noise
Study Project. Exhibit 9-A identifies the representative receiver locations and noise source
locations used to assess the operational noise levels. Appendix 9.1 includes the detailed
calculations for the Project operational noise levels presented in this section.
9.1 OPERATIONAL NOISE SOURCES
This noise analysis describes the noise level impacts associated with the expected typical
operational activities related to residential mixed use at the Project site. The on-site Project-
related operational noise sources are expected to include: roof-top air conditioning units, parking
lot vehicle movements, and trash enclosures.
9.2 REFERENCE OPERATIONAL NOISE LEVELS
To estimate the Project operational noise impacts, reference noise level measurements were
collected from similar types of activities to represent the noise levels expected with the
development of the proposed Project. This section provides a detailed description of the
reference noise level measurements shown on Table 9-1 used to estimate the Project operational
noise impacts. It is important to note that the following projected noise levels assume the worst-
case noise environment with the roof-top air conditioning units, parking lot vehicle movements,
and trash enclosures.
9.2.1 MEASUREMENT PROCEDURES
The reference noise level measurements presented in this section were collected using a
combination of Type 1 and Type 2 sound level meters. Each sound level meter was programmed
in "slow" mode to record noise levels in "A" weighted form and calibrated prior to each
measurement. The sound level meters and microphones were equipped with a windscreen
during all measurements. All noise level measurement equipment satisfies the American
National Standards Institute (ANSI) standard specifications for sound level meters ANSI S1.4-
2014/IEC 61672-1:2013. (14)
9.2.2 REFERENCE ROOF-TOP AIR CONDITIONING UNITS
To assess the noise levels created by the roof-top air conditioning units at the Project site,
reference noise levels measurements were taken at the Santee Walmart on July 27th, 2015.
Located at 170 Town Center Parkway in the City of Santee, the noise level measurements
describe mechanical roof-top air conditioning units on the roof of an existing Walmart store, with
additional units operating in the background. The reference noise level represents Lennox
SCA120 series 10-ton model packaged air conditioning units. Using a uniform reference distance
of 50 feet, the reference noise level is 57.2 dBA Leq. The operating conditions of the reference
noise level measurement reflect peak summer cooling requirements with measured
temperatures approaching 96 degrees Fahrenheit (°F) with average daytime temperatures of
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82°F. The roof-top air condition units were observed to operate the most during the daytime
hours for a total of 39 minutes per hour. The noise attenuation provided by a parapet wall is not
reflected in this reference noise level measurement.
9.2.3 TRASH ENCLOSURE ACTIVITY
To describe the noise levels associated with a trash enclosure, Urban Crossroads collected a
reference noise level measurement on May 3rd, 2018 at an existing commercial and office park
trash enclosure within a parking lot on the northeast corner of Baker Street and Red Hill Avenue.
The measured reference noise level at the uniform 50-foot reference distance is 57.3 dBA Leq for
the trash enclosure activity. The trash enclosure activity noise levels include two metal gates
opening and closing, metal scraping against concrete floor sounds, dumpster movement on metal
wheels, trash dropping into the metal dumpster, and background parking lot vehicle movements.
Noise associated with trash enclosure activities is expected to occur for 20 minutes per hour
9.2.4 PARKING LOT VEHICLE MOVEMENTS
To determine the noise levels associated with parking lot vehicle movements, Urban Crossroads
collected reference noise level measurements over a 24-hour period on May 17th, 2017 at the
parking lot for the Panasonic Avionics Corporation in the City of Lake Forest. The peak hour of
activity measured over the 24-hour noise level measurement period occurred between 12:00
p.m. to 1:00 p.m., or the typical lunch hour for employees working in the area. The measured,
peak-hour reference noise level at 50 feet from the parking activity was measured at 41.7 dBA
Leq. The parking activity noise levels are mainly due to cars pulling in and out of spaces during
peak lunch hour activity and employees talking. This reference noise level measurement is
anticipated to conservatively overstate the parking noise levels of the Project since it represents
the parking activity associated with that of a larger, commercial office use with a greater number
of parking spaces. Noise associated with parking lot vehicle movements is expected to operate
for the entire hour (60 minutes), which is consistent with the reference noise level measurements
at Panasonic.
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TABLE 9-1: REFERENCE NOISE LEVEL MEASUREMENTS
Noise Source Duration
(hh:mm:ss)
Ref.
Distance
(Feet)
Noise
Source
Height
(Feet)
Hourly
Activity
(Mins)4
Reference Noise
Level (dBA Leq)
@ Ref.
Dist.
@ 50
Feet
Roof-Top Air Conditioning Unit1 96:00:00 5' 5' 39 77.2 57.2
Trash Enclosure Activity2 00:00:32 5' 5' 20 77.3 57.3
Parking Lot Vehicle Movements3 01:00:00 10' 5' 60 52.2 41.7
1 As measured by Urban Crossroads, Inc. on 7/27/2015 at the Santee Walmart located at 170 Town Center Parkway.
2 As measured by Urban Crossroads, Inc. on 5/3/2018 at a commercial and office park trash enclosure in the City of Costa Mesa.
3 As measured by Urban Crossroads, Inc. on 5/17/2017 at the Panasonic Avionics Corporation in the City of Lake Forest.
4 Anticipated duration (minutes within the hour) of noise activity during typical hourly conditions expected at the Project site
based on the reference noise level measurement activity.
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EXHIBIT 9-A: OPERATIONAL NOISE SOURCE AND RECEIVER LOCATIONS
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9.3 PROJECT OPERATIONAL NOISE LEVELS
Using the reference noise levels to represent the proposed Project operations that include roof-
top air conditioning units, parking lot vehicle movements, and trash enclosures, Urban
Crossroads, Inc. calculated the operational source noise levels that are expected to be generated
at the Project site and the Project-related noise level increases that would be experienced at each
of the sensitive receiver locations. The operational noise level calculations shown on Table 9-2
account for the distance attenuation provided due to geometric spreading, when sound from a
localized stationary source (i.e., a point source) propagates uniformly outward in a spherical
pattern. Hard site conditions are used in the operational noise analysis which result in noise
levels that attenuate (or decrease) at a rate of 6 dBA for each doubling of distance from a point
source. The basic noise attenuation equation shown below is used to calculate the distance
attenuation based on a reference noise level (SPL1):
SPL2 = SPL1 - 20log(D2/D1)
Where SPL2 is the resulting noise level after attenuation, SPL1 is the source noise level, D2 is the
distance to the reference sound pressure level (SPL1), and D1 is the distance to the receiver
location. Table 9-2 shows the individual operational noise levels of each noise source at each of
the nearby sensitive receiver locations. As indicated on Table 9-2, the Project-only operational
noise levels will range from 24.1 to 44.9 dBA Leq at the sensitive receiver locations.
TABLE 9-2: PROJECT OPERATIONAL NOISE LEVELS
Receiver
Location1
Noise Levels by Noise Source (dBA Leq)2 Combined
Operational
Noise Levels
(dBA Leq)
Roof-Top Air
Conditioning Units
Trash Enclosure
Activity
Parking Lot Vehicle
Movements
R1 42.5 24.1 34.8 43.2
R2 40.8 44.0 40.2 46.8
R3 34.9 37.6 32.5 40.3
R4 44.9 30.6 37.9 45.8
R5 44.9 24.6 34.9 45.4
1 See Exhibit 9-A for the receiver and noise source locations.
2 Reference noise sources as shown on Table 9-1. Individual noise source calculations are provided in Appendix 9.1.
9.4 PROJECT OPERATIONAL NOISE LEVEL COMPLIANCE
To demonstrate compliance with local noise regulations, the Project-only operational noise levels
are evaluated against the City of Newport Beach exterior noise level standards at nearby noise-
sensitive receiver locations. For the noise-sensitive residential land use, the City of Newport
Beach has established exterior noise level standards of 55 dBA Leq during the daytime hours (7:00
a.m. to 10:00 p.m.) and 50 dBA Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.). (12) In
the event the ambient noise level exceeds the noise standard, the maximum allowable noise level
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under said category shall be increased to reflect he maximum ambient noise level (Section
10.26.025(C)). Table 9-3 shows that the operational noise levels associated with Noise Study
Project will satisfy the City of Newport Beach exterior noise level standards at all nearby receiver
locations. Therefore, the operational noise impacts are considered less than significant at the
nearby noise-sensitive receiver locations.
TABLE 9-3: OPERATIONAL NOISE LEVEL COMPLIANCE
Receiver
Location1
Noise Level at
Receiver
Locations
(dBA Leq)2
Exterior Noise Standards3 Threshold Exceeded?4
Daytime Nighttime Daytime Nighttime
R1 43.2 59.9 56.0 No No
R2 46.8 57.3 50.6 No No
R3 40.3 55.0 50.0 No No
R4 45.8 59.3 54.6 No No
R5 45.4 55.0 50.0 No No
1 See Exhibit 9-A for the receiver and noise source locations.
2 Estimated Project operational noise levels as shown on Table 9-2.
3 Base exterior noise level standards as shown on Table 3-1. If the ambient level exceeds allowable exterior Leq noise level, the
ambient shall be the standard per Section 10.26.025 (C) of the City of Newport Beach Municipal Code.
4 Do the Project operational noise levels exceed the exterior noise standards.
"Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.
9.5 PROJECT OPERATIONAL NOISE LEVEL CONTRIBUTIONS
To describe the Project operational noise level contributions, the Project operational noise levels
are combined with the existing ambient noise levels measurements for nearby receiver locations
potentially impacted by Project operational noise sources. Since the units used to measure noise,
decibels (dB), are logarithmic units, the Project-operational and existing ambient noise levels
cannot be combined using standard arithmetic equations. (4) Instead, they must be
logarithmically added using the following base equation:
SPLTotal = 10log10[10SPL1/10 + 10SPL2/10 + … 10SPLn/10]
Where “SPL1,” “SPL2,” etc. are equal to the sound pressure levels being combined, or in this case,
the Project-operational and existing ambient noise levels. The difference between the combined
Project and ambient noise levels describe the Project noise level contributions to the existing
ambient noise environment. Noise levels that would be experienced at receiver locations when
Project-source noise is added to the daytime and nighttime ambient conditions are presented on
Tables 9-4 and 9-5, respectively. As indicated on Tables 9-4 and 9-5, the Project will generate a
daytime operational noise level increase of up to 0.9 dBA Leq and a nighttime operational noise
level increase of up to 2.4 dBA Leq at the nearby receiver locations. Since the Project-related
operational noise level contributions will satisfy the operational noise level increase significance
criteria presented in Table 4-2, the increases at the sensitive receiver locations will be less than
significant.
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TABLE 9-4: PROJECT DAYTIME NOISE LEVEL CONTRIBUTIONS
Receiver
Location1
Total Project
Operational
Noise Level2
Measurement
Location3
Reference
Ambient
Noise Levels4
Combined
Project and
Ambient5
Project
Increase6 Threshold7 Threshold
Exceeded?7
R1 43.2 L1 59.9 60.0 0.1 2.0 No
R2 46.8 L2 57.3 57.7 0.4 2.0 No
R3 40.3 L3 53.6 53.8 0.2 3.0 No
R4 45.8 L4 59.3 59.5 0.2 2.0 No
R5 45.4 L5 52.0 52.9 0.9 3.0 No
1 See Exhibit 9-A for the sensitive receiver locations.
2 Total Project operational noise levels as shown on Table 9-3.
3 Reference noise level measurement locations as shown on Exhibit 5-A.
4 Observed daytime ambient noise levels as shown on Table 5-1.
5 Represents the combined ambient conditions plus the Project operational activities.
6 The noise level increase expected with the addition of the proposed Project operational activities.
7 Significance Criteria as defined in Section 4.
TABLE 9-5: PROJECT NIGHTTIME NOISE LEVEL CONTRIBUTIONS
Receiver
Location1
Total Project
Operational
Noise Level2
Measurement
Location3
Reference
Ambient
Noise Levels4
Combined
Project and
Ambient5
Project
Increase6 Threshold7 Threshold
Exceeded?7
R1 43.2 L1 56.0 56.2 0.2 2.0 No
R2 46.8 L2 50.6 52.1 1.5 3.0 No
R3 40.3 L3 46.8 47.7 0.9 3.0 No
R4 45.8 L4 54.6 55.1 0.5 3.0 No
R5 45.4 L5 46.6 49.0 2.4 3.0 No
1 See Exhibit 9-A for the sensitive receiver locations.
2 Total Project operational noise levels as shown on Table 9-3.
3 Reference noise level measurement locations as shown on Exhibit 5-A.
4 Observed nighttime ambient noise levels as shown on Table 5-1.
5 Represents the combined ambient conditions plus the Project operational activities.
6 The noise level increase expected with the addition of the proposed Project operational activities.
7 Significance Criteria as defined in Section 4.
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10 CONSTRUCTION NOISE IMPACTS
Construction noise represents the combination of several types of equipment, the location of the
equipment, and the duration of the noise-generating activities through different stages of
construction. Each stage of construction involves the use of different types of construction
equipment with unique noise characteristics operating at the varying distances within the
construction activity area.
This section analyzes potential impacts resulting from the short-term construction activities
associated with the development of the Project. Exhibit 10-A shows the construction activity
boundaries in relation to the nearby sensitive receiver locations. To minimize the short-term
construction activities, the Project will provide a temporary 16-foot high screen wall as shown on
Exhibit 10-A.
10.1 CONSTRUCTION NOISE SOURCES
Noise generated by the Project construction source equipment will include a combination of
trucks, power tools, concrete mixers, and portable generators that when combined can reach
high levels. The number and mix of construction equipment is expected to occur in the following
stages:
• Demolition
• Site Preparation
• Grading
• Building Construction
• Paving
• Architectural Coating
This construction noise analysis was prepared using reference noise level measurements taken
by Urban Crossroads, Inc. to describe the typical construction activity noise levels for each stage
of Project construction. The construction reference noise level measurements represent a list of
typical construction activity noise levels. Noise levels generated by heavy construction
equipment can range from approximately 68 dBA to more than 80 dBA when measured at 50
feet. However, these noise levels diminish with distance from the construction site at a rate of 6
dBA per doubling of distance. For example, a noise level of 80 dBA measured at 50 feet from the
noise source to the receiver would be reduced to 74 dBA at 100 feet from the source to the
receiver, and would be further reduced to 68 dBA at 200 feet from the source to the receiver.
10.2 CONSTRUCTION REFERENCE NOISE LEVELS
To describe the Project construction noise levels, measurements were collected for similar
activities at several construction sites. Table 10-1 provides a summary of the construction
reference noise level measurements for each stage of construction. Since the reference noise
levels were collected at varying distances, all construction noise level measurements presented
on Table 10-1 have been adjusted to describe a uniform reference distance of 50 feet.
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TABLE 10-1: CONSTRUCTION REFERENCE NOISE LEVELS
Construction
Stage Reference Construction Activity1
Reference Noise
Level @ 50 Feet
(dBA Leq)
Highest Reference
Noise Level
(dBA Leq)
Demolition
Demolition Activity 67.9
71.9 Backhoe 64.2
Water Truck Pass-By & Backup Alarm 71.9
Site
Preparation
Scraper, Water Truck, & Dozer Activity 75.3
75.3 Backhoe 64.2
Water Truck Pass-By & Backup Alarm 71.9
Grading
Rough Grading Activities 73.5
73.5 Water Truck Pass-By & Backup Alarm 71.9
Construction Vehicle Maintenance Activities 67.5
Building
Construction
Foundation Trenching 68.2
71.6 Framing 62.3
Concrete Mixer Backup Alarms & Air Brakes 71.6
Paving
Concrete Mixer Truck Movements 71.2
71.2 Concrete Paver Activities 65.6
Concrete Mixer Pour & Paving Activities 65.9
Architectural
Coating
Air Compressors 65.2
65.2 Generator 64.9
Crane 62.3
1 Reference construction noise level measurements taken by Urban Crossroads, Inc.
2 Distance from the nearest point of construction activity to the nearest receiver.
3 Point (stationary) source drop off rate of 6.0 dBA per doubling of distance.
4 Estimated barrier attenuation from existing barriers in the Project study area, if any.
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EXHIBIT 10-A: CONSTRUCTION ACTIVITY AND RECEIVER LOCATIONS
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10.3 CONSTRUCTION NOISE LEVELS
Using the reference construction equipment noise levels, calculations of the Project construction
noise level impacts at the nearby sensitive receiver locations were completed. The distances
shown on Exhibit 8-A (Receiver Locations) of the Noise Study represent the approximate
distances to the Project site boundaries from each receiver location. The distances on Exhibit 10-
A of the Noise Study, to the Project construction activities, represent the approximate distances
to primary Project construction activities (i.e., the noise source) based on field observations at
reference construction sites where primary activities are located, and therefore, are different
than those shown on Exhibit 8-A. This is necessary to avoid placing the construction noise source
in the shadow zone of the temporary noise barrier. This approach recogni zes that it is not
possible to place the construction noise source activities at the same location as the barrier and
ensures that the construction noise sources are located at distances that reflect actual
conditions.
Table 10-2 presents the highest reference short-term construction noise levels for each stage of
construction with the planned temporary 16-foot high screen wall. The reference construction
noise levels used in the analysis include multiple pieces of equipment (scraper, water truck and
dozer) operating at once. The highest reference noise level during the Site Preparation stage of
construction is used in the construction noise analysis is represented by a Site Preparation activity
of 75.3 dBA Leq at 50 feet. The highest reference noise source used in the Project construction
noise analysis represents multiple pieces of construction equipment operating simultaneously to
conservatively estimate Project construction noise levels.
The temporary screen wall will be erected between the construction zone and adjacent sensitive
receivers as shown on Exhibit 10-A. It will have a minimum height of 16 feet and be free of gaps
and holes and will achieve a Sound Transmission Class (STC) of 35 or greater. The barrier will
either be (a) a ¾-inch-thick plywood wall OR (b) a hanging blanket/curtain with a surface density
of at least 2 pounds per square foot. For either configuration, the construction side of the barrier
will have an exterior lining of sound absorption material with a Noise Reduction Coefficient (NRC)
rating of at least 0.7.
Using the highest reference noise level of 75.3 dBA Leq, Table 10-2 provides a summary of the
construction noise levels at the nearby noise-sensitive receiver locations. The construction noise
levels associated with the proposed Project are expected to create temporarily high noise levels
at the nearby receiver locations. To assess the worst-case construction noise levels, this analysis
shows the highest noise impacts when the equipment with the highest reference noise level is
operating at the closest point from the edge of primary construction activity to each receiver
location. Appendix 10.1 includes the detailed calculations for the Project construction noise
levels presented in this section.
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TABLE 10-2: CONSTRUCTION ACTIVITY NOISE LEVELS
Reference Construction Activity1
Reference Noise
Level @ 50 Feet
(dBA Leq)
Demolition 71.9
Site Preparation 75.3
Grading 73.5
Building Construction 71.6
Paving 71.2
Architectural Coating 65.2
Highest Reference Noise Level at 50 Feet (dBA Leq): 75.3
Receiver
Location
Distance to
Construction
Activity
(Feet)2
Distance
Attenuation
(dBA Leq)3
Estimated
Noise Barrier
Attenuation
(dBA Leq)4
Construction
Noise Level
(dBA Leq)
R1 97' -5.8 -13.5 52.6
R2 69' -2.8 -11.4 57.7
R3 217' -12.7 -11.2 48.0
R45 37' 2.6 -15.5 59.0
R5 67' -2.5 -14.3 55.1
1 Reference construction noise level measurements taken by Urban Crossroads, Inc.
2 Distance from the nearest point of construction activity to the nearest receiver.
3 Point (stationary) source drop off rate of 6.0 dBA per doubling of distance.
4 Estimated barrier attenuation from existing barriers/berms in the Project study area (Appendix 10.1).
5 Distance to primary Project construction activity recognizes that it is not possible to place the construction noise source
at the same location as the barrier and avoids placing the construction noise source in the shadow zone of the temporary
noise barrier.
10.4 CONSTRUCTION NOISE LEVEL COMPLIANCE
The City of Newport Beach has set restrictions to control noise impacts associated with the
construction of the proposed Project. According to the City of Newport Beach Municipal Code
Section 10.28.040 (included in Appendix 3.2), construction activities are considered exempt from
the noise standards of the noise ordinance if limited to the hours of 7:00 a.m. to 6:30 p.m. on
Mondays to Fridays, and 8:00 a.m. to 6:00 p.m. on Saturdays, with no activity allowed on Sundays
or national holidays. (2) Therefore, if construction activities occur within the permitted hours of
the Municipal Code, Project construction noise levels are considered exempt from the noise
ordinance standards.
To evaluate whether the Project will generate potentially significant short-term noise levels at
off-site sensitive receiver locations a construction-related the NIOSH noise level threshold of 85
dBA Leq is used to determine whether construction noise will impact nearby sensitive receiver
locations. Table 10-3 shows the highest construction noise levels at the potentially impacted
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receiver locations are expected to approach 59.0 dBA Leq and will satisfy the NIOSH 85 dBA Leq
significance threshold during temporary Project construction activities. The noise impact due to
Project construction noise levels is considered a less than significant impact at all nearby sensitive
receiver locations.
TABLE 10-3: CONSTRUCTION EQUIPMENT NOISE LEVEL COMPLIANCE
Receiver
Location1 Land Use2
Construction Noise Levels (dBA Leq)
Highest
Levels3 Threshold4 Threshold
Exceeded?5
R1 - (204 Tustin Ave.) Residential 52.6 85 No
R2 - (124 Tustin Ave.) Residential 57.7 85 No
R3 - (Newport Theatre Arts) Park 48.0 85 No
R4 - (2400 W. Coast Hwy.) Mixed-Use 59.0 85 No
R5 - (Courtyard) Mixed-Use 55.1 85 No
1 Noise receiver locations are shown on Exhibit 10-A.
2 City of Newport Beach Interactive Map (Zoning)
3 Estimated construction noise levels during peak operating conditions, as shown on Table 10-2.
4 Construction noise level threshold as shown on Table 4-2.
5 Do the estimated Project construction noise levels exceed the construction noise level threshold?
These less than significant findings are consistent with the 2006 General Plan Environmental
Impact Report (EIR) (3): Construction activities would be an ongoing occurrence in the City and,
in particular cases, could occur in close proximity to noise-sensitive uses. Although the proposed
General Plan Update limits construction activities to specific days of the week and hours of the
day, construction equipment generates high noise levels, as shown in Table 4.9-9 and may not
always be reducible to the levels specified in the City Noise Ordinance. Section 10.26.035 of the
Municipal Code (Exemptions), exempts “noise sources associated with construction, repair,
remodeling, demolition, or grading of any real property.” Section 10.26.035 also states that
construction noise should fall under the provisions of Section 10.28 of the Code (Loud and
Unreasonable Noise). Thus, construction noise is not subject to the noise standards in the
Municipal Code, but only during limited hours of the day and days of the week. In sum, existing
and future construction noise levels at individual construction sites may not substantially differ,
but previously unexposed areas could experience new sources of construction noise. Both existing
and future noise would be exempt from the City code and when construction noise occurs, impacts
would be considered less than significant.
10.5 CONSTRUCTION NOISE ABATEMENT MEASURES
Recognizing the potential for Project related short-term construction noise level increases at
nearby noise sensitive uses, the following measures are incorporated as design features of the
Project. These measures would reduce construction noise in excess of the construction noise
estimates shown in Table 10-3.
• At least 30 days prior to commencement of demolition or any other construction activities,
notification will be given to all residents or businesses within 500 feet of the project site regarding
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the planned construction activities. The notification will include a brief description of the project,
the activities that would occur, and the duration and hours when construction would occur. The
notification will also include the telephone number of the construction contractor’s authorized
representative to respond in the event of a vibration or noise complaint.
• Prior to the beginning of construction activities, a sign will be posted at the entrance to the job
site, clearly visible to the public, that contains a contact name and telephone number of the
construction contractor’s authorized representative to respond in the event of a vibration or noise
complaint. If the authorized representative receives a complaint, he/she will investigate, take
appropriate corrective action, and report the action to the City of Newport Beach’s Community
Development Director.
• All construction-related trips (including worker commuting, material deliveries, and debris/soil
hauling) will be routed to minimize pass-bys or residential areas around the project site.
• All heavy construction equipment used on the proposed project will be maintained in good
operating condition, with all internal combustion, engine-driven equipment fitted with intake and
exhaust muffles, air intake silencers, and engine shrouds no less effective than as originally
equipped by the manufacturer.
• Electrically powered equipment instead of pneumatic or internal combustion powered equipment
will be used to the extent possible.
• All stationary noise-generating equipment will be located as far away as possible from
neighboring property lines, with attention paid to the residential complex (currently under
construction) to the north of the project site.
• All internal combustion engine idling both on the site and at nearby queuing areas will be limited
to no more than five minutes for any given vehicle or machine. Signs will be posted at the job site
and along queueing lanes to reinforce the prohibition of unnecessary engine idling.
• The use of noise producing signals, including horns, whistles, alarms, and bells will be for safety
warning purposes only. Smart back-up alarms, which automatically adjust the alarm level based
on the background noise level or switch off back-up alarms and replace with human spotters, will
be used.
10.6 CONSTRUCTION VIBRATION IMPACTS
Construction has the potential to result in varying degrees of temporary ground vibration,
depending on the specific construction activities and equipment used. Ground vibration levels
associated with various types of construction equipment are summarized on Table 10-4. Based
on the representative vibration levels presented for various construction equipment types, it is
possible to estimate the human response (annoyance) using the following vibration assessment
methods defined by the FTA. To describe the human response (annoyance) associated with
vibration impacts the FTA provides the following equation:
LVdB(D) = LVdB(25 ft) – 30log(D/25)
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TABLE 10-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT
Equipment Vibration Decibels (VdB)
at 25 feet1
Small bulldozer 58
Jackhammer 79
Loaded Trucks 86
Large bulldozer 87
Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment
It is expected that ground-borne vibration from Project construction activities would cause only
intermittent, localized intrusion. The proposed Project’s construction activities most likely to
cause vibration impacts are:
• Heavy Construction Equipment: Although all heavy mobile construction equipment has the
potential of causing at least some perceptible vibration while operating close to buildings, the
vibration is usually short-term and is not of sufficient magnitude to cause building damage.
• Trucks: Trucks hauling building materials to construction sites can be sources of vibration
intrusion if the haul routes pass through residential neighborhoods on streets with bumps or
potholes. Repairing the bumps and potholes generally eliminates the problem.
Ground-borne vibration levels resulting from construction activities occurring within the Project
site were estimated by data published by the Federal Transit Administration (FTA). Using the
vibration source level of construction equipment provided on Table 10-4 and the construction
vibration assessment methodology published by the FTA, it is possible to estimate the Project
vibration impacts. Table 10-5 shows the highest construction vibration levels are expected to
approach 73.8 VdB at residential uses and buildings where people normally sleep will satisfy the
78 VdB Residential-Daytime vibration thresholds. Therefore, temporary construction related
vibration impacts will be less than significant. Moreover, the impacts at the site of the closest
sensitive receivers are unlikely to be sustained during the entire construction period but will
occur rather only during the times that heavy construction equipment is operating adjacent to
the Project site perimeter.
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TABLE 10-5: CONSTRUCTION EQUIPMENT VIBRATION LEVELS
Receiver
Location1
Land
Use
Distance to
Construction
Activity
(Feet)
Receiver Vibration Levels (VdB)2
Threshold
(VdB)3
Threshold
Exceeded?4 Small
Bulldozer
Jack-
hammer
Loaded
Trucks
Large
Bulldozer
Highest
Vibration
Levels
R1 Residential 97' 40.3 61.3 68.3 69.3 69.3 78 No
R2 Residential 69' 44.8 65.8 72.8 73.8 73.8 78 No
1 Noise receiver locations are shown on Exhibit 10-A.
2 Based on the Vibration Source Levels of Construction Equipment included on Table 6-4.
3 Federal Transit Administration, Transit Noise and Vibration Impact Assessment.
4 Does the vibration level exceed the FTA acceptable vibration level for the given land use?
"n/a" = The FTA does not identify a vibration level threshold for the given use unless it contains vibration-sensitive activity or equipment within the building.
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11 REFERENCES
1. State of California. California Environmental Quality Act, Appendix G. 2018.
2. City of Newport Beach. Municipal Code, Chapter 10.28 Loud and Unreasonable Noise.
3. —. Draft Environmental Impact Report General Plan 2006 Update. April 2006.
4. California Department of Transportation Environmental Program. Technical Noise Supplement - A
Technical Supplement to the Traffic Noise Analysis Protocol. Sacramento, CA : s.n., September 2013.
5. Environmental Protection Agency Office of Noise Abatement and Control. Information on Levels of
Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of
Safety. March 1974. EPA/ONAC 550/9/74-004.
6. U.S. Department of Transportation, Federal Highway Administration, Office of Environment and
Planning, Noise and Air Quality Branch. Highway Traffic Noise Analysis and Abatement Policy and
Guidance. June, 1995.
7. U.S. Department of Transportation, Federal Highway Administration. Highway Traffic Noise in the
United States, Problem and Response. April 2000. p. 3.
8. U.S. Environmental Protection Agency Office of Noise Abatement and Control. Noise Effects
Handbook-A Desk Reference to Health and Welfare Effects of Noise. October 1979 (revised July 1981).
EPA 550/9/82/106.
9. U.S. Department of Transportation, Federal Transit Administration. Transit Noise and Vibration Impact
Assessment. September 2018.
10. Office of Planning and Research. State of California General Plan Guidelines. 2018.
11. City of Newport Beach. General Plan Noise Element. November, 2006.
12. —. Municipal Code, Chapter 10.26 Community Noise Control.
13. National Institute for Occupational Safety and Health. Criteria for Recommended Standard:
Occupational Noise Exposure. June 1998.
14. American National Standards Institute (ANSI). Specification for Sound Level Meters ANSI S1.4-
2014/IEC 61672-1:2013.
15. U.S. Department of Transportation, Federal Highway Administration. FHWA Highway Traffic Noise
Prediction Model. December 1978. FHWA-RD-77-108.
16. California Department of Transportation Environmental Program, Office of Environmental
Engineering. Use of California Vehicle Noise Reference Energy Mean Emission Levels (Calveno REMELs)
in FHWA Highway Traffic Noise Prediction. September 1995. TAN 95-03.
17. California Department of Transportation. Traffic Noise Attenuation as a Function of Ground and
Vegetation Final Report. June 1995. FHWA/CA/TL-95/23.
18. City of Newport Beach. General Plan Circulation Element Figure CE1 Master Plan of Streets and
Highways. September 2006.
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12 CERTIFICATION
The contents of this noise study report represent an accurate depiction of the noise environment
and impacts associated with the proposed Noise Study Project. The information contained in this
noise study report is based on the best available data at the time of preparation. If you have any
questions, please contact me directly at (949) 336-5979.
Bill Lawson, P.E., INCE
Principal
URBAN CROSSROADS, INC.
260 E. Baker Street, Suite 200
Costa Mesa, CA 92626
(949) 336-5979
blawson@urbanxroads.com
EDUCATION
Master of Science in Civil and Environmental Engineering
California Polytechnic State University, San Luis Obispo • December, 1993
Bachelor of Science in City and Regional Planning
California Polytechnic State University, San Luis Obispo • June, 1992
PROFESSIONAL REGISTRATIONS
PE – Registered Professional Traffic Engineer – TR 2537 • January, 2009
AICP – American Institute of Certified Planners – 013011 • June, 1997–January 1, 2012
PTP – Professional Transportation Planner • May, 2007 – May, 2013
INCE – Institute of Noise Control Engineering • March, 2004
PROFESSIONAL AFFILIATIONS
ASA – Acoustical Society of America
ITE – Institute of Transportation Engineers
PROFESSIONAL CERTIFICATIONS
Certified Acoustical Consultant – City of Orange • February, 2011
FHWA-NHI-142051 Highway Traffic Noise Certificate of Training • February, 2013
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APPENDIX 3.1:
CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.26
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Chapter 10.26
COMMUNITY NOISE CONTROL
Sections:
10.26.005 Declaration of Policy.
10.26.010 Definitions.
10.26.015 Decibel Measurement Criteria.
10.26.020 Designated Noise Zones.
10.26.025 Exterior Noise Standards.
10.26.030 Interior Noise Standards.
10.26.035 Exemptions.
10.26.040 Schools, Day Care Centers, Churches, Libraries, Museums, Health Care Institutions—Special
Provisions.
10.26.045 Heating, Venting and Air Conditioning—Special Provisions.
10.26.050 Sound-Amplifying Equipment.
10.26.055 Noise Level Measurement.
10.26.065 Proposed Developments.
10.26.070 Prima Facie Violation.
10.26.075 Violations.
10.26.080 Violations—Additional Remedies—Injunctions.
10.26.085 City Manager Waiver.
10.26.090 Noise Abatement Programs.
10.26.095 Manner of Enforcement.
10.26.100 Severability.
10.26.005 Declaration of Policy.
A. In order to control unnecessary, excessive and annoying noise in the City of Newport Beach, it is declared to
be the policy of the City to prohibit such noise generated from or by all sources as specified in this chapter.
B. It is determined that certain noise levels are detrimental to the public health, welfare and safety and contrary
to public interest, therefore, the City Council of the City of Newport Beach does ordain and declare that creating,
maintaining, causing or allowing to be created, caused or maintained, any noise in a manner prohibited by, or not
in conformity with, the provisions of this chapter, is a public nuisance and may be punished as a public nuisance.
The ordinance codified in this chapter is effective thirty (30) days from adoption, however, all fixed noise sources
existing at the date of adoption shall have ninety (90) days from the date of adoption to achieve compliance with
this chapter. (Ord. 95-38 § 11 (part), 1995)
10.26.010 Definitions.
The following words, phrases and terms as used in this chapter shall have the meanings as indicated here:
“Agricultural property” means a parcel of real property which is undeveloped for any use other than agricultural
purposes.
“Ambient noise level” means the all-encompassing noise level associated with a given environment, being a
composite of sounds from all sources, excluding the alleged offensive noise, at the location and approximate time
at which a comparison with the alleged offensive noise is to be made.
“A-weighted sound level” means the total sound level meter with a reference pressure of twenty (20) micropascals
using the A-weighted network (scale) at slow response. The unit of measurement shall be defined as DBA.
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“Code Enforcement Officer” means the Code Enforcement Officer of the City or his duly authorized deputy.
“Commercial property” means a parcel of real property which is used as either in part or in whole for commercial
purposes.
“Cumulative period” means an additive period of time composed of individual time segments which may be
continuous or interrupted.
“Decibel (Db)” means a unit which denotes the ratio between two quantities which are proportional to power: the
number of decibels corresponding to the ratio of two amounts of power is ten times the logarithm to the base ten
of this ratio.
“Dwelling unit” means any area within a structure on any parcel which:
1. Contains separate or independent living facilities for one or more persons, with an area or equipment for
sleeping, sanitation and food preparation, and which has independent exterior access to ground level; or
2. Is being utilized for residential purposes by one or more persons separately or independently from
occupants of other areas within the structure.
“Emergency machinery, vehicle, work or alarm” means any machinery, vehicle, work or alarm used, employed,
performed or operated in an effort to protect, provide or restore safety conditions in the community or for the
citizenry, or work by private or public utilities when restoring utility service.
“Equivalent, noise, level, leq.” means the sound level corresponding to a steady state noise level over a given
measurement period with the same amount of acoustic energy as the actual time varying noise level. Also known
as the energy average noise level during the measurement period. The measurement period shall be fifteen (15)
minutes under the terms of this chapter.
“Fixed noise source” means a stationary device which creates sounds while fixed or motionless including but not
limited to residential, agricultural, industrial and commercial machinery and equipment, pumps, fans,
compressors, air conditioners and refrigeration equipment.
“Grading” means any excavating of filling of earth material or any combination thereof conducted at a site to
prepare said site for construction or other improvements thereon.
“Health care institution” means any hospital, convalescent home or other similar facility excluding residential.
“Hertz (HZ)” means the unit which describes the frequency of a function periodic in time which is the reciprocal of
the period.
“Impulsive noise” means a noise of short duration usually less than one second and of high intensity, with an
abrupt onset and rapid decay.
“Industrial property” means a parcel of real property which is used either in part or in whole for manufacturing
purposes.
“Intruding noise level” means the total sound level, in decibels, created, caused, maintained or originating from an
alleged offensive source at a specified location while the alleged offensive source is in operation.
“Licensed” means the issuance of a formal license or permit by the appropriate jurisdictional authority, or where
no permits or licenses are issued, the sanctioning of the activity by the jurisdiction as noted in public record.
“Major roadway” means any street, avenue, boulevard or highway used for motor vehicle traffic which is owned or
controlled by a public government entity.
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“Mobile noise source” means any noise source other than a fixed noise source.
“Person” means any individual, firm, partnership, association, corporation, company or organization of any kind,
including public agencies.
“Residential property” means a parcel of real property which is used either in part or in whole for residential
purposes, other than transient uses such as hotels and motels, and residential care facilities. Residential property
includes the residential portion of mixed use properties.
“Simple tone noise” means a noise characterized by a predominant frequency or frequencies so that other
frequencies cannot be readily distinguished. If measured, simple tone noise shall exist if the one-third octave
band sound pressure levels in the band with the tone exceeds the arithmetic average of the sound pressure
levels of the two continuous one-third octave bands as follows: five Db for frequencies of five hundred (500) Hertz
(Hz) and above or, by fifteen (15) Db for frequencies less than or equal to one hundred twenty-three (123) Hz.
“Sound level meter” means an instrument meeting American National Standard Institute’s Standard S1.4-1971 or
most recent revision thereof for Type 2 sound level meters or an instrument and the associated recording and
analyzing equipment which will provide equivalent data.
“Sound pressure level” of a sound, in decibels, means twenty (20) times the logarithm to the base ten of the ratio
of the pressure of the sound to a reference pressure which shall be explicitly stated.
“Vibration” means any movement of the earth, ground or other similar surface created by a temporal and spatial
oscillation device or equipment located upon, affixed in conjunction with that surface. (Ord. 95-38 § 11 (part),
1995)
10.26.015 Decibel Measurement Criteria.
Any decibel measurement made pursuant to the provisions of this chapter shall be based on a reference sound
pressure of twenty (20) micropascals as measured with a sound level meter using the A-weighted network (scale)
at slow response. (Ord. 95-38 § 11 (part), 1995)
10.26.020 Designated Noise Zones.
The properties hereinafter described assigned to the following noise zones:
Noise Zone I — All single-, two- and multiple-family
residential properties;
Noise Zone II — All commercial properties;
Noise Zone III — The residential portion of mixed-use
properties;
Noise Zone IV — All manufacturing or industrial properties.
The actual use of the property shall be the determining factor in establishing whether a property is in Noise Zone
I, II, III or IV provided that the actual use is a legal use in the City of Newport Beach. (Ord. 95-38 § 11 (part),
1995)
10.26.025 Exterior Noise Standards.
A. The following noise standards, unless otherwise specifically indicated, shall apply to all property with a
designated noise zone:
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NOISE
ZONE
TYPE OF LAND
USE
ALLOWABLE EXTERIOR NOISE LEVEL (Equivalent Noise
Level, Leq)
7 a.m. to 10 p.m.10 p.m. to 7 a.m.
I Single-, two-or
multiple-family
residential
55 DBA 50 DBA
II Commercial 65 DBA 60 DBA
III Residential
portions of
mixed-use
properties
60 DBA 50 DBA
IV Industrial or
manufacturing
70 DBA 70 DBA
If the ambient noise level exceeds the resulting standard, the ambient shall be the standard.
B. It is unlawful for any person at any location within the incorporated area of 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,
which causes the noise level when measured on any other property, to exceed either of the following:
1. The noise standard for the applicable zone for any fifteen-minute period;
2. A maximum instantaneous noise level equal to the value of the noise standard plus twenty (20) DBA for
any period of time (measured using A-weighted slow response).
C. In the event the ambient noise level exceeds the noise standard, the maximum allowable noise level under
said category shall be increased to reflect the maximum ambient noise level.
D. The Noise Zone III standard shall apply to that portion of residential property falling within one hundred (100)
feet of a commercial property, if the intruding noise originates from that commercial property.
E. If the measurement location is on boundary between two different noise zones, the lower noise level
standard applicable to the noise zone shall apply. (Ord. 95-53 § 1, 1995; Ord. 95-38 § 11 (part), 1995)
10.26.030 Interior Noise Standards.
A. The following noise standard, unless otherwise specifically indicated, shall apply to all residential property
within all noise zones:
NOISE
ZONE
TYPE OF LAND
USE
ALLOWABLE INTERIOR NOISE LEVEL (Equivalent Noise
Level, Leq)
7 a.m. to 10 p.m.10 p.m. to 7 a.m.
I Residential 45 DBA 40 DBA
III Residential
portions of
mixed-use
properties
45 DBA 40 DBA
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If the ambient noise level exceeds the resulting standard, the ambient shall be the standard.
B. It shall be unlawful for any person at any location within the incorporated area of the City to create any noise
or to allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such a
person which causes the noise level when measured on any other property, to exceed either of the following:
1. The noise standard for the applicable zone for any fifteen-minute period;
2. A maximum instantaneous noise level equal to the value of the noise standard plus twenty (20) DBA for
any period of time (measured using A-weighted slow response).
C. In the event the ambient noise level exceeds the noise standard, the noise standard applicable to said
category shall be increased to reflect the maximum ambient noise level.
D. The Noise Zone III standard shall apply to that portion of residential property falling within one hundred (100)
feet of a commercial property, if the intruding noise originates from that commercial property.
E. If the measurement location is on a boundary between two different noise zones, the lower noise level
standard applicable to the noise zone shall apply. (Ord. 95-53 § 2, 1995; Ord. 95-38 § 11 (part), 1995)
10.26.035 Exemptions.
The following activities shall be exempted from the provisions of this chapter:
A. Any activity conducted on public property, or on private properly with the consent of the owner, by any public
entity, or its officers, employees, representatives, agents, subcontractors, permittees, licensees, or lessees, which
are consistent with, and in furtherance of, the governmental functions or services the public entity has authorized,
or responsible, to perform, activities which are exempt from the provisions of this chapter include, without
limitation, sporting and recreational activities which are sponsored or co-sponsored by the City of Newport Beach
or the Newport Mesa Unified School District;
B. Occasional outdoor gatherings, public dances, show, sporting and entertainment events, provided said
events are conducted pursuant to a permit or license issued by the appropriate jurisdiction relative to the staging
of said events;
C. Any mechanical device, apparatus or equipment used, related to or connected with emergency machinery,
vehicle, work or warning alarm or bell, provided the sounding of any bell or alarm on any building or motor vehicle
shall terminate its operation within forty-five (45) minutes in any hour of its being activated;
D. Noise sources associated with construction, repair, remodeling, demolition or grading of any real property.
Such activities shall instead be subject to the provisions of Chapter 10.28 of this title;
E. Noise sources associated with construction, repair, remodeling, demolition or grading of public rights-of-way
or during authorized seismic surveys;
F. All mechanical devices, apparatus or equipment associated with agriculture operations provided that:
1. Operations do not take place between eight p.m. and seven a.m. on weekdays, including Saturday, or at
any time Sunday or a federal holiday, or
2. Such operations and equipment are utilized for the protection or salvage of agricultural crops during
periods of potential or actual frost damage or other adverse weather conditions, or
3. Such operations and equipment are associated with agricultural pest control through pesticide
application, provided the application is made in accordance with permits issued by or regulations enforced
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by the California Department of Agriculture;
G. Noise sources associated with the maintenance of real property. Such activities shall instead be subject to
the provisions of Chapter 10.28 of this title;
H. Any activity to the extent regulation thereof has been preempted by state or federal law. NOTE: Preemption
may include motor vehicle, aircraft in flight, and railroad noise regulations;
I. Any noise sources associated with people and/or music associated with a party at a residential property. Such
noise is difficult to measure under the terms of this chapter and instead shall be subject to the provisions of
Chapters 10.28 and 10.58 of this title;
J. Any noise sources associated with barking dogs or other intermittent noises made by animals on any properly
within the City of Newport Beach. Such noise is difficult to measure under the terms of this chapter and instead
shall be subject to the provisions of Chapter 7.20 of this Code;
K. Any noise sources associated with the operation of a permanently installed heating, venting and air
conditioning (HVAC) equipment on a residential property permitted under the provisions of Section 10.26.045(B)
and (C);
L. Any noise sources specifically identified and mitigated under the provisions of a use permit, modification
permit, development agreement or planned community district development plan adopted prior to the date of
adoption of this chapter. (Ord. 95-53 § 3, 1995; Ord. 95-38 § 11 (part), 1995)
10.26.040 Schools, Day Care Centers, Churches, Libraries, Museums, Health Care Institutions
—Special Provisions.
It is unlawful for any person to create any noise which causes the noise level at any school, day care center,
hospital or similar health care institution, church, library or museum while the same is in use, to exceed the noise
standards specified in Section 10.26.025 prescribed for the assigned Noise Zone I (residential uses). (Ord. 95-38
§ 11 (part), 1995)
10.26.045 Heating, Venting and Air Conditioning—Special Provisions.
A. New HVAC Equipment. New permits for heating, venting and air conditioning (HVAC) equipment in or
adjacent to residential areas shall be issued only where installations can be shown by computation, based on the
sound rating of the proposed equipment, not to exceed an A-weighted sound pressure level of fifty (50) DBA or
not to exceed an A-weighted sound pressure level of fifty-five (55) dBA and be installed with a timing device that
will deactivate the equipment during the hours of ten p.m. to seven a.m. The method of computation used shall be
that specified in “Standard Application of Sound Rated Outdoor Unitary Equipment,” Standard 275, Air
conditioning and Refrigeration Institute, 1984 or latest revision thereof.
B. Existing HVAC Equipment.
1. HVAC equipment legally installed prior to April 22, 1981, shall be permitted to operate with an exterior
noise limit of sixty-five (65) dBA until January 1, 1998.
2. HVAC equipment legally installed prior to April 22, 1981, shall be exempted from the interior noise level
standard as specified in Section 10.26.030 of this chapter until January 1, 1998.
3. HVAC equipment legally installed after April 22, 1981, and prior to the date of adoption of this chapter
shall not exceed a maximum exterior noise limit of fifty-five (55) dBA during the ninety-day compliance
period set forth in Section 10.26.005.
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C. In the event that HVAC equipment cannot meet the requirements set forth in this chapter, then the exterior
noise limit for such equipment may be raised to sixty-five (65) dBA and exempted from the interior noise level
standard as specified in Section 10.26.030 of this chapter, provided that the applicant obtains the written consent
of all the owners of the affected properties. (Ord. 95-38 § 11 (part), 1995)
10.26.050 Sound-Amplifying Equipment.
Loudspeakers, sound amplifiers, public address systems or similar devices used to amplify sounds shall be
subject to the provisions of Chapter 10.32 of this title. Such sound-amplifying equipment shall not be construed to
include electronic devices, including but not limited to, radios, tape players, tape recorders, compact disc players,
electric keyboards, music synthesizers, record players or televisions, which are designed and operated for
personal use, or used entirely within a building and are not designed or used to convey the human voice, music or
any other sound to an audience outside such building, or which are used in vehicles and heard only by occupants
of the vehicle in which installed, which shall be subject to the provisions of Chapter 10.28 of this title. (Ord. 95-38
§ 11 (part), 1995)
10.26.055 Noise Level Measurement.
A. The location selected for measuring exterior noise levels in a residential area shall be at any part of a private
yard, patio, deck or balcony normally used for human activity and identified by the owner of the affected property
as suspected of exceeding the noise level standard. This location may be the closest point in the private yard or
patio, or on the deck or balcony, to the noise source, but should not be located in nonhuman activity areas such
as trash container storage areas, planter beds, above or contacting a property line fence, or other areas not
normally used as part of the yard, patio, deck or balcony. The location selected for measuring exterior noise levels
in a nonresidential area shall be at the closest point to the noise source. The measurement microphone height
shall be five feet above finish elevation or, in the case of a deck or balcony, the measurement microphone height
shall be five feet above the finished floor level.
B. The location selected for measuring interior noise levels shall be made within the affected residential unit.
The measurements shall be made at a point at least four feet from the wall, ceiling or floor, or within the frame of
a window opening, nearest the noise source. The measurements shall be made with windows in an open position.
(Ord. 95-38 § 11 (part), 1995)
10.26.065 Proposed Developments.
Each department whose duty it is to review and approve new projects or changes to existing projects that result
or may result in the creation of noise shall consult with the Code Enforcement Officer prior to any such approval.
If at any time the Code Enforcement Officer has reason to believe that a standard, regulation, action, proposed
standard, regulation or action of any department respecting noise does not conform to the provisions as specified
in this chapter, the Code Enforcement Officer may request such department to consult with him on the advisability
of revising such standard or regulation to obtain uniformity. (Ord. 95-38 § 11 (part), 1995)
10.26.070 Prima Facie Violation.
Any noise exceeding the noise level standard as specified in Section 10.26.025 and 10.26.030 of this chapter,
shall be deemed to be prima facie evidence of a violation of the provisions of this chapter. (Ord. 95-38 § 11 (part),
1995)
10.26.075 Violations.
Any persons violating any of the provisions of this chapter shall be deemed guilty of an infraction. (Ord. 95-38 §
11 (part), 1995)
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10.26.080 Violations—Additional Remedies—Injunctions.
A. As an additional remedy, the operation or maintenance of any device, instrument, vehicle or machinery in
violation of any provisions of this chapter which operation or maintenance causes or creates sound levels
exceeding the allowable standards as specified in this chapter shall be deemed and is declared to be a public
nuisance and may be subject to abatement summarily by a restraining order or injunction issued by a court of
competent jurisdiction.
B. Any violation of this chapter is declared to be a public nuisance and may be abated in accordance with law.
The expense of this chapter is declared to be public nuisance and may be by resolution of the City Council
declared to be a lien against the property on which such nuisance is maintained, and such lien shall be made a
personal obligation of the property owner. (Ord. 95-38 § 11 (part), 1995)
10.26.085 City Manager Waiver.
The City Manager is authorized to grant a temporary waiver to the provisions of this chapter for a period of time
not to exceed thirty (30) days if such temporary waiver would be in the public interest and there is no feasible and
prudent alternative to the activity, or the method of conducting the activity, for which the temporary waiver is
sought. (Ord. 95-38 § 11 (part), 1995)
10.26.090 Noise Abatement Programs.
A. In circumstances which adopted community-wide noise standards and policies prove impractical in
controlling noise generated from a specific source, the City Council may establish a noise abatement program
which recognizes the characteristics of the noise source and affected property and which incorporates specialized
mitigation measures.
B. Noise abatement programs shall set forth in detail the approved terms, conditions and requirements for
achieving maximum compliance with noise standards and policies. Said terms, conditions and requirements may
include, but shall not be limited to, limitations, restrictions, or prohibitions on operating hours, location of
operations, and the types of equipment. (Ord. 95-38 § 11 (part), 1995)
10.26.095 Manner of Enforcement.
A. The City Code Enforcement Officer is directed to enforce the provisions of this chapter and may issue
citations for any violation of the provisions of this chapter or violations of this chapter may be prosecuted or
enforced in the same manner as other infractions pursuant to this Code; provided, however, that in the event of
an initial violation of the provisions of this chapter, a written notice may be given to the alleged violator which
specifies the time by which the condition shall be corrected.
B. No person shall interfere with, oppose or resist any authorized person charged with the enforcement of this
chapter while such person is engaged in the performance of his/her duty.
C. In the event the alleged violator cannot be located in order to serve any notice, the notice shall be deemed to
be given upon mailing such notice by registered or certified mail to the alleged violator at his last known address
or at the place where the violation occurred in which event the specified time period for abating the violation or
applying for a variance shall commence at the date of the day following the mailing of such notice. (Ord. 95-38 §
11 (part), 1995)
10.26.100 Severability.
If any provision, clause, sentence, or paragraph of this chapter, or the application thereof to any person or
circumstance shall be held invalid, such invalidity shall not affect the other provisions of this chapter which can be
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given effect without the invalid provisions or application and, to this end, the provisions of this chapter are hereby
declared to be severable. (Ord. 95-38 § 11 (part), 1995)
The Newport Beach Municipal Code is current through
Ordinance 2019-14, passed September 10, 2019.
Disclaimer: The City Clerk's Office has the official version of the
Newport Beach Municipal Code. Users should contact the City
Clerk's Office for ordinances passed subsequent to the ordinance
cited above.
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APPENDIX 3.2:
CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.28
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Chapter 10.28
LOUD AND UNREASONABLE NOISE*
Sections:
10.28.005 Policy.
10.28.007 Loud and Unreasonable Noise is Prohibited.
10.28.010 Loud and Unreasonable Noise.
10.28.020 Loud and Raucous Noise from Sound-Making or Amplifying Devices Prohibited.
10.28.040 Construction Activity—Noise Regulations.
10.28.045 Real Property Maintenance—Noise Regulations.
10.28.050 Exceptions.
* Sound-amplifying equipment—See Chapter 10.32.
Prior history: 1949 Code § 4208; Ords. 1191, 1802, 87-11, 87-17 and 93-7.
10.28.005 Policy.
It is found and declared as follows:
A. The making, allowing, creation or maintenance of loud and unreasonable, unnecessary, or unusual noises
which are prolonged, unusual, annoying, disturbing and/or unreasonable in their time, place and use are a
detriment to public health, comfort, convenience, safety, general welfare and the peace and quiet of the City and
its inhabitants.
B. The necessity in the public interest for the provisions and prohibitions contained and enacted is to declare as
a matter of legislative determination and public policy, and it is further declared that the provisions and
prohibitions contained and enacted are in pursuance of and for the purpose of securing and promoting the public
health, comfort, convenience, safety, general welfare and property and the peace and quiet of the City and its
inhabitants. (Ord. 2001-4 § 1, 2001)
10.28.007 Loud and Unreasonable Noise is Prohibited.
It is unlawful for any person or property owner to make, continue, cause or allow to be made any loud,
unreasonable, unusual, penetrating or boisterous noise, disturbance or commotion which annoys, disturbs,
injures or endangers the comfort, repose, health, peace and quiet within the limits of the City, and the acts and
things listed in this chapter, among others, are declared to be loud, disturbing, injurious and unreasonable noises
in violation of this Chapter, but shall not be deemed to be exclusive. (Ord. 2001-4 § 2, 2001)
10.28.010 Loud and Unreasonable Noise.
It is unlawful for any person or property owner to willfully make, allow, continue or cause to be made, allowed, or
continued, any loud and unreasonable, unnecessary, or disturbing noise, including, but not limited to, yelling,
shouting, hooting, whistling, singing, playing music, or playing a musical instrument, which disturbs the peace,
comfort, quiet or repose of any area or which causes discomfort or annoyance to any reasonable person of
normal sensitivities in the area, after a peace or code enforcement officer has first requested that the person or
property owner cease and desist from making or continuing, or causing to make or continue, such loud,
unreasonable, unnecessary, excessive or disturbing noise.
The factors, standards, and conditions which should be considered in determining whether a violation of the
provisions of this section has been committed, include, but are not limited to, the following:
A. The level of the noise;
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B. Whether the nature of the noise is usual or unusual;
C. Whether the origin of the noise is natural or unnatural;
D. The level and intensity of the background (ambient) noise, if any;
E. The proximity of the noise to residential or commercial sleeping areas;
F. The nature and zoning of the area within which the noise emanates;
G. The density of inhabitation of the area within which the noise emanates;
H. The time of day and night the noise occurs;
I. The duration of the noise;
J. Whether the noise is constant, or recurrent or intermittent; and
K. Whether the noise is produced by a commercial or noncommercial activity;
L. If the noise is produced by a commercial activity, whether the use is lawful under the provisions of Title 20 of
this Code and whether the noise is one that could reasonably be expected from the commercial activity.
M. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor, unless the
violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2001-4 § 3
(part), 2001: Ord. 95-38 § 3 (part), 1995)
10.28.020 Loud and Raucous Noise from Sound-Making or Amplifying Devices Prohibited.
A. It is unlawful for any person to cause, allow or permit the emission or transmission of any loud or raucous
noise from any sound-making or sound-amplifying device in his possession or under his control:
1. Upon any private property; or
2. Upon any public street, alley, sidewalk or thoroughfare; or
3. In or upon any public park, beach or other public place or property.
B. The words “loud and raucous noise,” as used herein, shall mean any sound or any recording thereof when
amplified or increased by any electrical, mechanical or other device to such volume, intensity or carrying power as
to unreasonably interfere with the peace and quiet of other persons within or upon any one or more of such
places or areas, or as to unreasonably annoy, disturb, impair or endanger the comfort, repose, health, or safety of
other persons within or upon any one or more such places or areas.
C. The word “unreasonably,” as used herein, shall include, but not be limited to, consideration of the hour,
place, nature and circumstances of the emission or transmission of any such loud and raucous noise.
D. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor unless the
violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2001-4 § 3
(part), 2001: Ord. 95-38 § 3 (part), 1995)
10.28.040 Construction Activity—Noise Regulations.
A. No person shall, while engaged in construction, remodeling, digging, grading, demolition, painting, plastering
or any other related building activity, operate any tool, equipment or machine in a manner which produces loud
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noise that disturbs, or could disturb, a person of normal sensitivity who works or resides in the vicinity, unless
authorized to do so in accordance with subsection (B) of this section.
B. The provisions of subsection (A) of this section shall not apply to the following:
1. Work performed on any weekday, which is not a federal holiday, between the hours of 7:00 a.m. and
6:30 p.m.
2. Work performed on a Saturday, in any area of the City that is not designated as a high-density area,
between the hours of 8:00 a.m. and 6:00 p.m.
3. Emergency work performed pursuant to written authorization of the Community Development Director,
or his or her designee.
4. Maintenance, repair or improvement of any public work or facility by public employees, by any person or
persons acting pursuant to a public works contract, or by any person or persons performing such work or
pursuant to the direction of, or on behalf of, any public agency; provided, however, this exception shall not
apply to the City of Newport Beach, or its employees, contractors or agents, unless:
a. The City Manager or department director determines that the maintenance, repair or improvement
is immediately necessary to maintain public services;
b. The maintenance, repair or improvement is of a nature that cannot feasibly be conducted during
normal business hours; or
c. The City Council has approved project specifications, contract provisions, or an environmental
document that specifically authorizes construction during hours of the day which would otherwise be
prohibited pursuant to this section.
C. No landowner, construction company owner, contractor, subcontractor, or employer shall permit or allow any
person or persons working under their direction and control to operate any tool, equipment or machine in violation
of the provisions of this section.
D. Any person who violates any provision of this section is guilty of a misdemeanor unless the violation is
deemed an infraction pursuant to the provisions of Section 1.04.010, or any successor section, of this Code.
E. Designated High-Density Area. The term “designated high-density area” shall mean any shaded area on the
following map. See Exhibit A *. The geographical boundaries of a homeowners’ association, as defined in
subsection (F) of this section, shall be excluded from the definition of a “designated high-density area” if the City
Council adopts a resolution pursuant to subsection (F) of this section.
F. A homeowners’ association located within a designated high-density area may exclude the geographical
boundaries of the homeowners’ association from the definition of a designated high-density area if:
1. The board of directors of the homeowners’ association votes to approve a resolution or letter declaring
its desire to exempt its geographical boundaries from the definition of a designated high-density area;
2. The board of directors submits the approved resolution or letter to the City Clerk for consideration by the
City Council; and
3. The City Council adopts a resolution finding that exempting the geographical boundaries of the
homeowners’ association from the definition of a designated high-density area will not negatively affect
surrounding property owners.
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For the purpose of this subsection, a “homeowners’ association” means an organization consisting of at least
thirty (30) voting members whose properties connect in a contiguous manner and whose operation is governed by
a board of directors. (Ord. 2019-11 §§ 1, 2, 2019; Ord. 2019-9 § 1, 2019: Ord. 2013-11 § 35, 2013; Ord. 2001-4
§ 3 (part), 2001: Ord. 95-38 § 3 (part), 1995)
*Exhibit A is on file in the City Clerk’s office.
10.28.045 Real Property Maintenance—Noise Regulations.
A. Weekdays and Saturdays. No person shall, while engaged in maintenance of real property, operate any tool,
equipment or machine in a manner which produces loud noise that disturbs, or could disturb, a person of normal
sensitivity who works or resides in the vicinity, except between the hours of seven a.m. and six-thirty p.m.,
Monday through Friday, nor on any Saturday, except between the hours of eight a.m. and six p.m.
B. Sundays and Holidays. No person shall, while engaged in maintenance of real property, operate any tool,
equipment or machine in a manner which produces loud noise that disturbs, or could disturb, a person of normal
sensitivity who works or resides in the vicinity, on any Sunday or any federal holiday.
C. No landowner, gardener, property maintenance service, contractor, subcontractor or employer shall permit or
allow any person or persons working under their direction and control to operate any tool, equipment or machine
in violation of the provisions of this section.
D. After January 1, 1996, mechanical blowers, as defined in Section 6.04.055, shall not be operated at a noise
level that exceeds an A-weighted sound pressure level of seventy (70) dBA, as measured at a distance of fifty
(50) feet. After January 1, 1999, such equipment shall not be operated at a noise level that exceeds an A-
weighted sound pressure level of sixty-five (65) dBA, as measured from a distance of fifty (50) feet.
E. Exceptions. The provisions of this section shall not apply to the following:
1. Emergency property maintenance authorized by the Community Development Director, or his or her
designee;
2. The maintenance, repair or improvement of any public work or facility by public employees, by any
person or persons acting pursuant to a public works contract, or by any person or persons performing such
work or pursuant to the direction of, or on behalf of, any public agency; provided, however, this exception
shall not apply to the City of Newport Beach, or its employees, contractors or agents, unless:
a. The City Manager or department director determines that the maintenance, repair or improvement
is immediately necessary to maintain public service,
b. The maintenance, repair or improvement is of a nature that cannot feasibly be conducted during
normal business hours,
c. The City Council has approved project specifications, contract provisions, or an environmental
document that specifically authorizes construction during hours of the day which would otherwise be
prohibited pursuant to this section;
3. Greens maintenance on golf courses conducted between the hours of six a.m. and eight p.m. and all
other types of golf course maintenance between the hours of seven a.m. and eight p.m., provided no
maintenance activity commences before six a.m.
F. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor unless the
violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2019-9 § 2,
2019; Ord. 2001-4 § 3 (part), 2001: Ord. 95-38 § 3 (part), 1995)
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10.28.050 Exceptions.
The provisions of Sections 10.28.040 and 10.28.045 shall not be construed to prohibit such work at different
hours by or under the direction of any other public agency in cases of necessity or emergency. (Ord. 2001-4 § 3
(part), 2001: Ord. 95-38 § 3 (part), 1995)
The Newport Beach Municipal Code is current through
Ordinance 2019-14, passed September 10, 2019.
Disclaimer: The City Clerk's Office has the official version of the
Newport Beach Municipal Code. Users should contact the City
Clerk's Office for ordinances passed subsequent to the ordinance
cited above.
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APPENDIX 5.1:
STUDY AREA PHOTOS
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JN: 12954 Study Area Photos
L1_E
33, 37' 13.530000", 117, 55' 20.010000"
L1_N
33, 37' 14.540000", 117, 55' 22.710000"
L1_S
33, 37' 12.860000", 117, 55' 21.280000"
L1_W
33, 37' 13.690000", 117, 55' 19.880000"
L2_E
33, 37' 13.550000", 117, 55' 18.700000"
L2_N
33, 37' 13.550000", 117, 55' 18.640000"
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JN: 12954 Study Area Photos
L2_S
33, 37' 13.550000", 117, 55' 18.640000"
L2_W
33, 37' 13.520000", 117, 55' 18.700000"
L3_E
33, 37' 14.540000", 117, 55' 15.670000"
L3_N
34, 0' 45.150000", 117, 23' 11.060000"
L3_S
33, 37' 13.780000", 117, 55' 16.960000"
L3_W
33, 37' 14.770000", 117, 55' 15.700000"
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JN: 12954 Study Area Photos
L4_E
33, 37' 12.920000", 117, 55' 16.660000"
L4_N
33, 37' 12.900000", 117, 55' 16.660000"
L4_S
33, 37' 12.920000", 117, 55' 16.660000"
L4_W
33, 37' 12.930000", 117, 55' 16.660000"
L5_E
33, 37' 13.110000", 117, 55' 20.010000"
L5_N
33, 37' 13.530000", 117, 55' 19.600000"
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JN: 12954 Study Area Photos
L5_S
33, 37' 13.110000", 117, 55' 20.010000"
L5_W
33, 37' 13.340000", 117, 55' 19.770000"
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APPENDIX 5.2:
NOISE LEVEL MEASUREMENT WORKSHEETS
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Date:Location:Meter:Piccolo II JN:12954
Project:2510 PCH Mixed-Use Development Analyst:P. Mara
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%L eq Adj.Adj. L eq
0 48.2 54.5 45.6 53.9 51.3 50.0 47.3 45.9 45.7 0.0 0.0 0.0 48.2 10.0 58.2
1 44.7 51.9 42.0 51.5 49.1 46.5 43.5 42.3 42.0 0.0 0.0 0.0 44.7 10.0 54.7
2 49.3 55.6 45.9 55.1 52.6 51.5 48.4 46.1 45.9 0.0 0.0 0.0 49.3 10.0 59.3
3 45.8 48.3 43.9 48.1 47.4 47.0 45.6 44.3 44.0 0.0 0.0 0.0 45.8 10.0 55.8
4 54.7 66.5 48.5 65.9 61.6 56.4 50.4 48.7 48.6 0.0 0.0 0.0 54.7 10.0 64.7
5 51.0 56.6 48.3 56.4 54.7 52.9 50.2 48.6 48.4 0.0 0.0 0.0 51.0 10.0 61.0
6 64.4 76.0 52.0 75.6 72.4 68.4 55.3 52.8 52.3 0.0 0.0 0.0 64.4 10.0 74.4
7 64.4 76.4 52.1 76.0 72.3 68.0 55.9 52.7 52.2 0.0 0.0 0.0 64.4 0.0 64.4
8 59.1 70.6 50.0 69.7 65.6 61.9 55.0 50.5 50.1 0.0 0.0 0.0 59.1 0.0 59.1
9 63.7 72.0 56.4 71.5 68.8 66.7 61.8 57.4 56.6 0.0 0.0 0.0 63.7 0.0 63.7
10 60.4 68.7 54.8 68.2 65.4 63.4 58.2 55.5 55.0 0.0 0.0 0.0 60.4 0.0 60.4
11 59.4 72.5 51.5 71.0 65.3 61.6 54.9 52.0 51.6 0.0 0.0 0.0 59.4 0.0 59.4
12 57.4 66.9 51.9 66.4 63.1 60.3 54.8 52.3 52.0 0.0 0.0 0.0 57.4 0.0 57.4
13 58.1 67.5 51.7 67.0 63.9 61.6 55.1 52.2 51.9 0.0 0.0 0.0 58.1 0.0 58.1
14 58.5 66.5 52.1 66.0 63.7 62.4 55.5 52.5 52.2 0.0 0.0 0.0 58.5 0.0 58.5
15 58.0 65.3 54.3 64.9 62.5 60.4 56.5 54.7 54.4 0.0 0.0 0.0 58.0 0.0 58.0
16 60.3 69.5 54.4 69.0 66.1 63.7 57.5 54.8 54.5 0.0 0.0 0.0 60.3 0.0 60.3
17 59.8 70.2 53.3 69.6 66.2 62.8 56.5 53.7 53.4 0.0 0.0 0.0 59.8 0.0 59.8
18 59.1 68.8 53.2 68.4 65.1 61.9 56.4 53.6 53.3 0.0 0.0 0.0 59.1 0.0 59.1
19 58.3 67.8 51.5 67.6 64.9 62.4 54.5 52.1 51.6 0.0 0.0 0.0 58.3 5.0 63.3
20 54.2 62.3 49.7 61.9 59.1 56.7 52.3 50.1 49.8 0.0 0.0 0.0 54.2 5.0 59.2
21 54.8 62.3 50.5 61.9 59.9 57.9 53.0 50.9 50.6 0.0 0.0 0.0 54.8 5.0 59.8
22 51.2 59.4 47.2 58.8 56.0 54.0 49.4 47.5 47.3 0.0 0.0 0.0 51.2 10.0 61.2
23 46.4 55.0 41.8 54.7 52.3 49.9 44.0 42.1 41.9 0.0 0.0 0.0 46.4 10.0 56.4
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%
Min 57.4 65.3 50.0 64.9 62.5 60.3 54.8 50.5 50.1 0.0 0.0 0.0
Max 64.4 76.4 56.4 76.0 72.3 68.0 61.8 57.4 56.6 0.0 0.0 0.0
60.4 69.0 65.7 62.9 56.5 53.5 53.1 0.0 0.0 0.0
Min 54.2 62.3 49.7 61.9 59.1 56.7 52.3 50.1 49.8 0.0 0.0 0.0
Max 58.3 67.8 51.5 67.6 64.9 62.4 54.5 52.1 51.6 0.0 0.0 0.0
56.2 63.8 61.3 59.0 53.3 51.0 50.7 0.0 0.0 0.0
Min 44.7 48.3 41.8 48.1 47.4 46.5 43.5 42.1 41.9 0.0 0.0 0.0
Max 64.4 76.0 52.0 75.6 72.4 68.4 55.3 52.8 52.3 0.0 0.0 0.0
56.0 57.8 55.3 53.0 48.2 46.5 46.2 0.0 0.0 0.0
56.0
24-Hour Noise Level Measurement Summary
Hourly L eq dBA Readings (unadjusted)
L eq (dBA)
Night
Wednesday, October 2, 2019
24-Hour Daytime Nighttime
L1 - Located south of 204 Tustin Ave near the side yard of the
single-family home.
24-Hour CNEL (dBA)
63.5
Evening
Day
Evening
Energy Average
Night
Day
Night
Energy Average
Energy Average Average:
Average:
Average:
58.8 59.948.244.749.345.854.751.064.464.459.163.760.459.457.458.158.558.060.359.859.158.354.254.851.246.435.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Hourly Leq(dBA)Hour Beginning
U:\UcJobs\_12600-13000\_12900\12954\Field Work\Measurements\12954_L1_N
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Date:Location:Meter:Piccolo II JN:12954
Project:2510 PCH Mixed-Use Development Analyst:P. Mara
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%L eq Adj.Adj. L eq
0 49.0 56.7 40.5 56.5 56.0 55.6 42.4 40.7 40.6 0.0 0.0 0.0 49.0 10.0 59.0
1 42.6 49.5 39.7 49.2 47.1 45.2 41.0 39.9 39.8 0.0 0.0 0.0 42.6 10.0 52.6
2 53.0 60.6 40.7 60.6 60.4 60.3 44.1 41.2 40.8 0.0 0.0 0.0 53.0 10.0 63.0
3 43.4 48.9 41.5 48.6 46.4 44.9 42.7 41.8 41.6 0.0 0.0 0.0 43.4 10.0 53.4
4 47.1 54.6 43.8 54.2 52.0 49.1 45.5 44.1 43.9 0.0 0.0 0.0 47.1 10.0 57.1
5 49.2 56.1 45.6 55.7 53.3 51.5 48.1 45.9 45.7 0.0 0.0 0.0 49.2 10.0 59.2
6 56.3 65.1 49.3 64.6 62.3 60.5 53.1 49.9 49.5 0.0 0.0 0.0 56.3 10.0 66.3
7 59.8 68.6 51.3 68.3 66.8 64.5 55.1 52.0 51.5 0.0 0.0 0.0 59.8 0.0 59.8
8 57.5 71.0 48.7 68.9 62.1 60.1 54.0 49.5 48.9 0.0 0.0 0.0 57.5 0.0 57.5
9 56.1 62.0 51.2 61.5 59.8 58.8 55.2 51.9 51.4 0.0 0.0 0.0 56.1 0.0 56.1
10 64.7 71.7 61.2 71.3 68.9 67.4 63.1 61.6 61.3 0.0 0.0 0.0 64.7 0.0 64.7
11 54.4 59.9 49.2 59.5 58.0 57.1 53.3 49.9 49.4 0.0 0.0 0.0 54.4 0.0 54.4
12 54.6 60.3 50.2 59.8 58.1 56.9 53.8 50.8 50.3 0.0 0.0 0.0 54.6 0.0 54.6
13 55.9 63.6 48.8 63.0 60.9 59.6 53.4 49.6 49.0 0.0 0.0 0.0 55.9 0.0 55.9
14 54.2 60.1 48.0 59.7 58.3 57.4 52.7 48.5 48.1 0.0 0.0 0.0 54.2 0.0 54.2
15 53.5 59.3 49.4 58.6 57.0 56.0 52.6 49.8 49.5 0.0 0.0 0.0 53.5 0.0 53.5
16 56.1 64.6 50.3 64.0 61.8 59.8 53.6 50.9 50.5 0.0 0.0 0.0 56.1 0.0 56.1
17 56.2 63.2 49.6 62.7 61.0 59.8 53.4 50.2 49.7 0.0 0.0 0.0 56.2 0.0 56.2
18 54.5 61.6 49.3 61.2 59.0 57.4 53.0 49.9 49.4 0.0 0.0 0.0 54.5 0.0 54.5
19 53.4 60.8 48.1 60.5 58.6 56.4 51.7 48.6 48.2 0.0 0.0 0.0 53.4 5.0 58.4
20 50.8 57.9 45.5 57.4 55.2 53.5 49.5 46.0 45.6 0.0 0.0 0.0 50.8 5.0 55.8
21 54.8 59.5 52.5 59.1 57.3 56.3 54.2 52.9 52.6 0.0 0.0 0.0 54.8 5.0 59.8
22 51.1 56.1 48.0 55.8 54.2 53.0 50.4 48.3 48.1 0.0 0.0 0.0 51.1 10.0 61.1
23 44.3 51.5 39.7 51.1 49.1 47.4 42.4 40.0 39.8 0.0 0.0 0.0 44.3 10.0 54.3
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%
Min 53.5 59.3 48.0 58.6 57.0 56.0 52.6 48.5 48.1 0.0 0.0 0.0
Max 64.7 71.7 61.2 71.3 68.9 67.4 63.1 61.6 61.3 0.0 0.0 0.0
57.9 63.2 61.0 59.6 54.4 51.2 50.7 0.0 0.0 0.0
Min 50.8 57.9 45.5 57.4 55.2 53.5 49.5 46.0 45.6 0.0 0.0 0.0
Max 54.8 60.8 52.5 60.5 58.6 56.4 54.2 52.9 52.6 0.0 0.0 0.0
53.3 59.0 57.0 55.4 51.8 49.2 48.8 0.0 0.0 0.0
Min 42.6 48.9 39.7 48.6 46.4 44.9 41.0 39.9 39.8 0.0 0.0 0.0
Max 56.3 65.1 49.3 64.6 62.3 60.5 53.1 49.9 49.5 0.0 0.0 0.0
50.6 55.1 53.4 52.0 45.5 43.5 43.3 0.0 0.0 0.0
50.6
24-Hour Noise Level Measurement Summary
Hourly L eq dBA Readings (unadjusted)
L eq (dBA)
Night
Wednesday, October 2, 2019
24-Hour Daytime Nighttime
L2 - Located near the parking meters in the parking lot
adjacent to 124 Tustin Ave.
24-Hour CNEL (dBA)
59.2
Evening
Day
Evening
Energy Average
Night
Day
Night
Energy Average
Energy Average Average:
Average:
Average:
55.8 57.349.042.653.043.447.149.256.359.857.556.164.754.454.655.954.253.556.156.254.553.450.854.851.144.335.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Hourly Leq(dBA)Hour Beginning
U:\UcJobs\_12600-13000\_12900\12954\Field Work\Measurements\12954_L2_M
PA2019-249
Date:Location:Meter:Piccolo II JN:12954
Project:2510 PCH Mixed-Use Development Analyst:P. Mara
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%L eq Adj.Adj. L eq
0 42.7 46.6 40.0 46.5 45.8 45.2 41.9 40.2 40.0 0.0 0.0 0.0 42.7 10.0 52.7
1 40.5 43.2 38.6 43.2 42.8 42.3 40.0 38.7 38.7 0.0 0.0 0.0 40.5 10.0 50.5
2 46.5 49.3 43.9 49.3 49.0 48.5 46.1 44.2 44.0 0.0 0.0 0.0 46.5 10.0 56.5
3 49.5 55.6 46.3 55.4 54.2 52.7 47.7 46.4 46.3 0.0 0.0 0.0 49.5 10.0 59.5
4 46.1 47.6 44.9 47.6 47.4 47.2 45.9 45.0 44.9 0.0 0.0 0.0 46.1 10.0 56.1
5 47.3 49.8 45.4 49.8 49.5 49.0 46.9 45.6 45.4 0.0 0.0 0.0 47.3 10.0 57.3
6 48.7 50.5 47.3 50.5 50.2 50.0 48.5 47.4 47.3 0.0 0.0 0.0 48.7 10.0 58.7
7 49.0 50.3 47.8 50.2 50.0 49.9 48.9 47.9 47.8 0.0 0.0 0.0 49.0 0.0 49.0
8 49.3 51.0 47.8 51.0 50.7 50.5 49.1 48.0 47.9 0.0 0.0 0.0 49.3 0.0 49.3
9 56.3 57.5 54.9 57.5 57.4 57.3 56.3 55.0 54.9 0.0 0.0 0.0 56.3 0.0 56.3
10 56.4 60.3 51.7 60.3 59.9 59.4 54.8 52.0 51.8 0.0 0.0 0.0 56.4 0.0 56.4
11 54.1 56.4 52.0 56.3 56.0 55.6 53.9 52.2 52.1 0.0 0.0 0.0 54.1 0.0 54.1
12 52.1 53.9 50.7 53.9 53.6 53.4 51.8 50.8 50.7 0.0 0.0 0.0 52.1 0.0 52.1
13 53.3 56.1 50.7 56.0 55.7 55.3 52.9 50.9 50.7 0.0 0.0 0.0 53.3 0.0 53.3
14 56.0 59.1 53.3 59.0 58.6 58.0 55.5 53.5 53.3 0.0 0.0 0.0 56.0 0.0 56.0
15 53.8 58.1 51.6 58.0 57.2 56.2 52.9 51.8 51.7 0.0 0.0 0.0 53.8 0.0 53.8
16 55.3 58.4 52.8 58.3 58.0 57.5 54.8 53.0 52.9 0.0 0.0 0.0 55.3 0.0 55.3
17 53.7 57.1 51.4 57.0 56.6 56.0 53.0 51.5 51.4 0.0 0.0 0.0 53.7 0.0 53.7
18 54.0 56.9 51.7 56.8 56.4 55.9 53.5 51.9 51.8 0.0 0.0 0.0 54.0 0.0 54.0
19 50.5 52.2 49.3 52.1 51.9 51.6 50.3 49.4 49.3 0.0 0.0 0.0 50.5 5.0 55.5
20 49.2 51.3 47.5 51.2 50.9 50.6 49.0 47.7 47.6 0.0 0.0 0.0 49.2 5.0 54.2
21 49.1 51.0 47.6 50.9 50.6 50.3 48.9 47.7 47.6 0.0 0.0 0.0 49.1 5.0 54.1
22 48.1 50.4 46.1 50.3 50.0 49.7 47.7 46.3 46.1 0.0 0.0 0.0 48.1 10.0 58.1
23 45.2 47.8 43.0 47.7 47.4 46.9 44.8 43.2 43.1 0.0 0.0 0.0 45.2 10.0 55.2
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%
Min 49.0 50.3 47.8 50.2 50.0 49.9 48.9 47.9 47.8 0.0 0.0 0.0
Max 56.4 60.3 54.9 60.3 59.9 59.4 56.3 55.0 54.9 0.0 0.0 0.0
54.2 56.2 55.8 55.4 53.1 51.6 51.4 0.0 0.0 0.0
Min 49.1 51.0 47.5 50.9 50.6 50.3 48.9 47.7 47.6 0.0 0.0 0.0
Max 50.5 52.2 49.3 52.1 51.9 51.6 50.3 49.4 49.3 0.0 0.0 0.0
49.7 51.4 51.2 50.9 49.4 48.3 48.2 0.0 0.0 0.0
Min 40.5 43.2 38.6 43.2 42.8 42.3 40.0 38.7 38.7 0.0 0.0 0.0
Max 49.5 55.6 47.3 55.4 54.2 52.7 48.5 47.4 47.3 0.0 0.0 0.0
46.8 48.9 48.5 47.9 45.5 44.1 44.0 0.0 0.0 0.0
24-Hour CNEL (dBA)
55.4
Evening
Day
Evening
Energy Average
Night
Day
Night
Energy Average
Energy Average Average:
Average:
Average:
52.0 53.6 46.8
24-Hour Noise Level Measurement Summary
Hourly L eq dBA Readings (unadjusted)
L eq (dBA)
Night
Wednesday, October 2, 2019
24-Hour Daytime Nighttime
L3 - Located in the parking lot South of Newport Theatre Arts
Center.42.740.546.549.546.147.348.749.049.356.356.454.152.153.356.053.855.353.754.050.549.249.148.145.235.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Hourly Leq(dBA)Hour Beginning
U:\UcJobs\_12600-13000\_12900\12954\Field Work\Measurements\12954_L3_K
PA2019-249
Date:Location:Meter:Piccolo II JN:12954
Project:2510 PCH Mixed-Use Development Analyst:P. Mara
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%L eq Adj.Adj. L eq
0 47.2 57.3 44.8 53.1 49.4 48.7 46.5 45.4 45.1 0.0 0.0 0.0 47.2 10.0 57.2
1 46.1 54.6 43.5 52.8 48.7 48.0 45.2 44.1 43.8 0.0 0.0 0.0 46.1 10.0 56.1
2 50.4 55.9 45.2 55.2 54.3 53.7 49.1 46.1 45.5 0.0 0.0 0.0 50.4 10.0 60.4
3 47.8 50.9 45.8 50.2 49.4 48.9 47.6 46.5 46.2 0.0 0.0 0.0 47.8 10.0 57.8
4 50.7 54.4 48.7 53.5 52.6 52.0 50.3 49.2 48.9 0.0 0.0 0.0 50.7 10.0 60.7
5 51.4 59.4 48.4 57.5 54.6 52.9 50.5 49.0 48.7 0.0 0.0 0.0 51.4 10.0 61.4
6 62.2 77.4 51.0 72.3 68.4 65.9 56.8 51.8 51.4 0.0 0.0 0.0 62.2 10.0 72.2
7 60.3 69.4 54.6 67.6 65.4 63.8 58.0 55.4 54.9 0.0 0.0 0.0 60.3 0.0 60.3
8 58.5 69.6 50.6 68.1 64.3 61.3 55.6 51.6 51.0 0.0 0.0 0.0 58.5 0.0 58.5
9 58.5 71.7 51.6 67.9 64.1 60.9 55.7 52.5 52.0 0.0 0.0 0.0 58.5 0.0 58.5
10 63.5 73.3 57.4 71.8 68.8 66.0 61.3 58.9 58.1 0.0 0.0 0.0 63.5 0.0 63.5
11 57.9 69.6 51.0 66.3 63.2 61.1 55.1 52.1 51.5 0.0 0.0 0.0 57.9 0.0 57.9
12 56.9 68.2 51.2 65.7 62.2 59.3 54.6 52.2 51.6 0.0 0.0 0.0 56.9 0.0 56.9
13 58.5 69.2 50.8 67.8 64.7 62.4 54.7 51.8 51.2 0.0 0.0 0.0 58.5 0.0 58.5
14 58.1 68.4 51.0 66.0 63.3 61.6 55.4 51.9 51.4 0.0 0.0 0.0 58.1 0.0 58.1
15 57.4 67.7 52.4 65.7 62.1 59.7 55.4 53.3 52.8 0.0 0.0 0.0 57.4 0.0 57.4
16 61.0 72.6 53.1 71.1 67.5 64.0 57.2 54.1 53.5 0.0 0.0 0.0 61.0 0.0 61.0
17 61.8 75.9 52.6 73.9 68.6 62.8 56.1 53.5 53.0 0.0 0.0 0.0 61.8 0.0 61.8
18 59.2 71.1 52.6 68.2 64.9 62.4 56.3 53.4 53.0 0.0 0.0 0.0 59.2 0.0 59.2
19 58.7 69.8 51.2 68.9 65.5 62.3 54.6 52.0 51.6 0.0 0.0 0.0 58.7 5.0 63.7
20 54.1 63.3 49.3 62.2 58.8 56.5 52.4 50.0 49.6 0.0 0.0 0.0 54.1 5.0 59.1
21 56.6 66.6 53.0 64.4 61.0 58.2 55.2 53.6 53.3 0.0 0.0 0.0 56.6 5.0 61.6
22 55.4 70.1 49.7 67.2 59.5 56.7 52.2 50.3 50.0 0.0 0.0 0.0 55.4 10.0 65.4
23 48.5 52.9 46.2 51.9 50.7 50.0 48.0 46.8 46.5 0.0 0.0 0.0 48.5 10.0 58.5
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%
Min 56.9 67.7 50.6 65.7 62.1 59.3 54.6 51.6 51.0 0.0 0.0 0.0
Max 63.5 75.9 57.4 73.9 68.8 66.0 61.3 58.9 58.1 0.0 0.0 0.0
59.7 68.3 64.9 62.1 56.3 53.4 52.8 0.0 0.0 0.0
Min 54.1 63.3 49.3 62.2 58.8 56.5 52.4 50.0 49.6 0.0 0.0 0.0
Max 58.7 69.8 53.0 68.9 65.5 62.3 55.2 53.6 53.3 0.0 0.0 0.0
56.9 65.2 61.8 59.0 54.0 51.9 51.5 0.0 0.0 0.0
Min 46.1 50.9 43.5 50.2 48.7 48.0 45.2 44.1 43.8 0.0 0.0 0.0
Max 62.2 77.4 51.0 72.3 68.4 65.9 56.8 51.8 51.4 0.0 0.0 0.0
54.6 57.1 54.2 53.0 49.6 47.7 47.3 0.0 0.0 0.0
24-Hour CNEL (dBA)
62.4
Evening
Day
Evening
Energy Average
Night
Day
Night
Energy Average
Energy Average Average:
Average:
Average:
58.1 59.3 54.6
24-Hour Noise Level Measurement Summary
Hourly L eq dBA Readings (unadjusted)
L eq (dBA)
Night
Wednesday, October 2, 2019
24-Hour Daytime Nighttime
L4 - Located in parking lot north of 2400 West Coast Hwy and
west of Avon Lot 2
47.246.150.447.850.751.462.260.358.558.563.557.956.958.558.157.461.061.859.258.754.156.655.448.535.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Hourly Leq(dBA)Hour Beginning
U:\UcJobs\_12600-13000\_12900\12954\Field Work\Measurements\12954_L4_H
PA2019-249
Date:Location:Meter:Piccolo II JN:12954
Project:2510 PCH Mixed-Use Development Analyst:P. Mara
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%L eq Adj.Adj. L eq
0 39.2 45.2 36.3 44.7 42.9 41.7 38.0 36.6 36.4 0.0 0.0 0.0 39.2 10.0 49.2
1 37.5 42.9 35.6 42.0 40.1 39.2 36.8 35.8 35.7 0.0 0.0 0.0 37.5 10.0 47.5
2 51.4 53.4 49.7 53.3 52.9 52.7 51.1 49.9 49.7 0.0 0.0 0.0 51.4 10.0 61.4
3 41.8 44.3 37.4 44.0 43.4 43.0 42.4 37.7 37.5 0.0 0.0 0.0 41.8 10.0 51.8
4 49.6 56.8 47.5 56.5 54.2 51.7 48.1 47.6 47.5 0.0 0.0 0.0 49.6 10.0 59.6
5 43.7 50.2 40.8 49.4 47.5 46.0 42.7 41.1 40.9 0.0 0.0 0.0 43.7 10.0 53.7
6 49.3 57.4 43.9 56.8 54.5 52.2 47.4 44.6 44.1 0.0 0.0 0.0 49.3 10.0 59.3
7 51.0 57.8 45.6 57.4 55.6 54.0 49.5 46.3 45.8 0.0 0.0 0.0 51.0 0.0 51.0
8 50.9 57.6 45.4 56.8 54.8 53.7 49.8 46.2 45.6 0.0 0.0 0.0 50.9 0.0 50.9
9 51.8 60.0 46.8 59.0 56.2 54.7 50.4 47.6 47.0 0.0 0.0 0.0 51.8 0.0 51.8
10 55.5 62.1 50.7 61.7 59.6 58.2 54.2 51.5 50.9 0.0 0.0 0.0 55.5 0.0 55.5
11 52.1 59.8 46.8 58.7 56.3 54.9 50.6 47.6 47.0 0.0 0.0 0.0 52.1 0.0 52.1
12 50.6 57.9 46.5 57.0 54.3 52.9 49.6 47.3 46.7 0.0 0.0 0.0 50.6 0.0 50.6
13 51.9 58.1 47.6 57.5 56.1 55.0 50.5 48.2 47.8 0.0 0.0 0.0 51.9 0.0 51.9
14 52.7 58.9 47.4 58.3 57.2 56.3 50.8 48.0 47.6 0.0 0.0 0.0 52.7 0.0 52.7
15 54.7 64.6 49.2 63.0 60.2 58.0 52.3 49.8 49.4 0.0 0.0 0.0 54.7 0.0 54.7
16 54.2 60.9 49.8 60.2 58.5 57.2 52.8 50.5 50.0 0.0 0.0 0.0 54.2 0.0 54.2
17 50.8 56.9 47.4 56.4 54.7 53.3 49.8 47.8 47.5 0.0 0.0 0.0 50.8 0.0 50.8
18 50.8 57.1 47.0 56.5 54.7 53.6 49.6 47.4 47.1 0.0 0.0 0.0 50.8 0.0 50.8
19 49.7 57.5 46.0 56.7 53.9 52.0 48.3 46.4 46.1 0.0 0.0 0.0 49.7 5.0 54.7
20 46.9 53.9 42.3 53.4 51.4 49.9 45.2 42.8 42.4 0.0 0.0 0.0 46.9 5.0 51.9
21 49.0 54.5 46.4 54.1 52.4 51.0 48.1 46.7 46.5 0.0 0.0 0.0 49.0 5.0 54.0
22 45.3 51.0 42.2 50.6 49.1 47.7 44.2 42.4 42.3 0.0 0.0 0.0 45.3 10.0 55.3
23 39.8 46.4 36.6 46.0 44.0 42.3 38.4 36.9 36.7 0.0 0.0 0.0 39.8 10.0 49.8
Timeframe Hour L eq L max L min L1%L2%L5%L8%L25%L50%L90%L95%L99%
Min 50.6 56.9 45.4 56.4 54.3 52.9 49.5 46.2 45.6 0.0 0.0 0.0
Max 55.5 64.6 50.7 63.0 60.2 58.2 54.2 51.5 50.9 0.0 0.0 0.0
52.6 58.6 56.5 55.2 50.8 48.2 47.7 0.0 0.0 0.0
Min 46.9 53.9 42.3 53.4 51.4 49.9 45.2 42.8 42.4 0.0 0.0 0.0
Max 49.7 57.5 46.4 56.7 53.9 52.0 48.3 46.7 46.5 0.0 0.0 0.0
48.7 54.7 52.5 51.0 47.2 45.3 45.0 0.0 0.0 0.0
Min 37.5 42.9 35.6 42.0 40.1 39.2 36.8 35.8 35.7 0.0 0.0 0.0
Max 51.4 57.4 49.7 56.8 54.5 52.7 51.1 49.9 49.7 0.0 0.0 0.0
46.6 49.2 47.6 46.3 43.2 41.4 41.2 0.0 0.0 0.0
46.6
24-Hour Noise Level Measurement Summary
Hourly L eq dBA Readings (unadjusted)
L eq (dBA)
Night
Wednesday, October 2, 2019
24-Hour Daytime Nighttime
L5 - Located in courtyard of 124 Tustin Ave.
24-Hour CNEL (dBA)
54.6
Evening
Day
Evening
Energy Average
Night
Day
Night
Energy Average
Energy Average Average:
Average:
Average:
50.7 52.039.237.551.441.849.643.749.351.050.951.855.552.150.651.952.754.754.250.850.849.746.949.045.339.835.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Hourly Leq(dBA)Hour Beginning
U:\UcJobs\_12600-13000\_12900\12954\Field Work\Measurements\12954_L5_L
PA2019-249
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PA2019-249
APPENDIX 7.1:
ON-SITE TRAFFIC NOISE LEVEL CALCULATIONS
PA2019-249
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PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Auto Showroom
Road Name:W. Coast Hwy.
Scenario:First Floor With Wall
51,000
10%
62.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:5,100 vehicles
Centerline Dist. to Barrier:
62.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):5.0 feet
feet
40 mphVehicle Speed:
Near/Far Lane Distance:60 feet
REMEL Traffic Flow Distance
5.64
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-0.66
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-11.60 -0.64 -1.20 0.000 0.000
-15.56 -0.65 -1.20 0.000 0.000
-4.70
-4.88
-5.32
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
54.489
54.326
54.342
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
71.1 69.2 67.5 61.4 70.670.0
62.9
63.8
61.4 55.0 53.5 62.161.9
62.3 53.3 54.5 63.062.9
Vehicle Noise:72.4 70.6 67.9 62.8 71.871.3
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
71.1 69.2 67.5 61.4 70.670.0
62.9
63.8
61.4 55.0 53.5 62.161.9
62.3 53.3 54.5 63.062.9
Vehicle Noise:72.4 70.6 67.9 62.8 71.871.3
76.31
81.16
67.36
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Auto Showroom
Road Name:Tustin Ave.
Scenario:First Floor With Wall
3,000
10%
98.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:300 vehicles
Centerline Dist. to Barrier:
98.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):5.0 feet
feet
25 mphVehicle Speed:
Near/Far Lane Distance:12 feet
REMEL Traffic Flow Distance
-4.63
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-4.48
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-21.87 -4.48 -1.20 0.000 0.000
-25.82 -4.48 -1.20 0.000 0.000
-4.77
-4.88
-5.17
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
97.944
97.853
97.862
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
49.1 47.2 45.5 39.4 48.648.0
43.5
45.7
42.0 35.7 34.1 42.842.6
44.3 35.3 36.5 45.044.9
Vehicle Noise:51.5 49.8 46.3 42.0 50.950.5
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
49.1 47.2 45.5 39.4 48.648.0
43.5
45.7
42.0 35.7 34.1 42.842.6
44.3 35.3 36.5 45.044.9
Vehicle Noise:51.5 49.8 46.3 42.0 50.950.5
71.09
77.24
59.44
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Medical Office
Road Name:W. Coast Hwy.
Scenario:Second Floor With Wall
51,000
10%
62.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:5,100 vehicles
Centerline Dist. to Barrier:
62.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):14.0 feet
feet
40 mphVehicle Speed:
Near/Far Lane Distance:60 feet
REMEL Traffic Flow Distance
5.64
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-0.85
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-11.60 -0.78 -1.20 0.000 0.000
-15.56 -0.68 -1.20 0.000 0.000
-12.17
-12.67
-13.92
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
56.036
55.506
54.589
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
71.0 69.1 67.3 61.2 70.569.9
62.7
63.7
61.2 54.9 53.3 62.061.8
62.3 53.3 54.5 63.062.9
Vehicle Noise:72.2 70.4 67.7 62.6 71.771.2
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
71.0 69.1 67.3 61.2 70.569.9
62.7
63.7
61.2 54.9 53.3 62.061.8
62.3 53.3 54.5 63.062.9
Vehicle Noise:72.2 70.4 67.7 62.6 71.771.2
76.31
81.16
67.36
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Medical Office
Road Name:Tustin Ave.
Scenario:Second Floor With Wall
3,000
10%
98.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:300 vehicles
Centerline Dist. to Barrier:
98.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):14.0 feet
feet
25 mphVehicle Speed:
Near/Far Lane Distance:12 feet
REMEL Traffic Flow Distance
-4.63
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-4.54
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-21.87 -4.52 -1.20 0.000 0.000
-25.82 -4.49 -1.20 0.000 0.000
-12.72
-13.04
-13.84
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
98.813
98.514
98.000
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
49.1 47.2 45.4 39.4 48.648.0
43.5
45.7
42.0 35.6 34.1 42.842.5
44.3 35.3 36.5 45.044.9
Vehicle Noise:51.5 49.8 46.2 42.0 50.950.5
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
49.1 47.2 45.4 39.4 48.648.0
43.5
45.7
42.0 35.6 34.1 42.842.5
44.3 35.3 36.5 45.044.9
Vehicle Noise:51.5 49.8 46.2 42.0 50.950.5
71.09
77.24
59.44
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Residential
Road Name:W. Coast Hwy.
Scenario:Second Floor With Wall
51,000
10%
183.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:5,100 vehicles
Centerline Dist. to Barrier:
183.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):14.0 feet
feet
40 mphVehicle Speed:
Near/Far Lane Distance:60 feet
REMEL Traffic Flow Distance
5.64
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-8.49
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-11.60 -8.48 -1.20 0.000 0.000
-15.56 -8.47 -1.20 0.000 0.000
-13.17
-13.35
-13.77
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
181.066
180.903
180.624
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
63.3 61.4 59.6 53.6 62.862.2
55.0
55.9
53.5 47.2 45.6 54.354.1
54.5 45.5 46.7 55.255.1
Vehicle Noise:64.6 62.8 60.0 54.9 64.063.5
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
63.3 61.4 59.6 53.6 62.862.2
55.0
55.9
53.5 47.2 45.6 54.354.1
54.5 45.5 46.7 55.255.1
Vehicle Noise:64.6 62.8 60.0 54.9 64.063.5
76.31
81.16
67.36
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Residential
Road Name:Tustin Ave.
Scenario:Second Floor With Wall
3,000
10%
110.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:300 vehicles
Centerline Dist. to Barrier:
110.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):14.0 feet
feet
25 mphVehicle Speed:
Near/Far Lane Distance:12 feet
REMEL Traffic Flow Distance
-4.63
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-5.28
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-21.87 -5.27 -1.20 0.000 0.000
-25.82 -5.24 -1.20 0.000 0.000
-12.83
-13.11
-13.82
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
110.725
110.458
110.000
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
48.3 46.4 44.7 38.6 47.847.2
42.8
45.0
41.2 34.9 33.3 42.041.8
43.6 34.5 35.8 44.344.1
Vehicle Noise:50.7 49.0 45.5 41.2 50.149.7
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
48.3 46.4 44.7 38.6 47.847.2
42.8
45.0
41.2 34.9 33.3 42.041.8
43.6 34.5 35.8 44.344.1
Vehicle Noise:50.7 49.0 45.5 41.2 50.149.7
71.09
77.24
59.44
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Residential
Road Name:W. Coast Hwy.
Scenario:Third Floor With Wall
51,000
10%
183.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:5,100 vehicles
Centerline Dist. to Barrier:
183.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):23.0 feet
feet
40 mphVehicle Speed:
Near/Far Lane Distance:60 feet
REMEL Traffic Flow Distance
5.64
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-8.52
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-11.60 -8.51 -1.20 0.000 0.000
-15.56 -8.49 -1.20 0.000 0.000
-21.09
-21.38
-22.07
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
181.984
181.707
181.146
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
63.3 61.4 59.6 53.6 62.862.2
55.0
55.9
53.5 47.1 45.6 54.354.0
54.5 45.5 46.7 55.255.1
Vehicle Noise:64.5 62.7 60.0 54.9 64.063.5
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
63.3 61.4 59.6 53.6 62.862.2
55.0
55.9
53.5 47.1 45.6 54.354.0
54.5 45.5 46.7 55.255.1
Vehicle Noise:64.5 62.7 60.0 54.9 64.063.5
76.31
81.16
67.36
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL (CALVENO) - 10/1/2012
SITE SPECIFIC INPUT DATA
Project Name:2510 PCH
Job Number:12954
Analyst:B. LawsonLot No:Residential
Road Name:Tustin Ave.
Scenario:Third Floor With Wall
3,000
10%
110.0
NOISE MODEL INPUTS
Average Daily Traffic (Adt):
Peak Hour Percentage:
Peak Hour Volume:300 vehicles
Centerline Dist. to Barrier:
110.0Centerline Dist. to Observer:
Highway Data
feet
feet
vehicles
Road Elevation:0.0
Barrier Elevation:0.0
Pad Elevation:0.0
Site Data
Site Conditions (Hard = 10, Soft = 15)
Medium Trucks (2 Axles):15
Heavy Trucks (3+ Axles):15
Autos:15
Vehicle Mix
feet
feet Lane Equivalent Distance (in feet)
Barrier Height:0.0
Observer Height (Above Pad):23.0 feet
feet
25 mphVehicle Speed:
Near/Far Lane Distance:12 feet
REMEL Traffic Flow Distance
-4.63
VehicleType Day Evening Night Daily
Medium Trucks:
Heavy Trucks:
Autos:77.5%12.9%9.6%97.42%
84.8%4.9%10.3%1.84%
86.5%2.7%10.8%0.74%
-5.37
Finite Road
-1.20
Barrier Atten
FHWA Noise Model Calculations
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0.0
0.000 0.000
Fresnel Berm Atten
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType
-21.87 -5.34 -1.20 0.000 0.000
-25.82 -5.29 -1.20 0.000 0.000
-20.18
-20.64
-21.79
Medium Trucks:
Heavy Trucks:
Autos:
Noise Source Elevations (in feet)
Medium Trucks:
Heavy Trucks:
Autos:0.000
2.297
8.006
112.219
111.770
110.855
Grade Adjustment:0.0
Unmitigated Noise Levels (without Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
48.2 46.3 44.6 38.5 47.847.1
42.7
44.9
41.2 34.8 33.3 42.041.7
43.5 34.5 35.7 44.244.1
Vehicle Noise:50.7 49.0 45.4 41.1 50.149.7
Mitigated Noise Levels (with Topo and barrier attenuation)
Medium Trucks:
Heavy Trucks:
Autos:
VehicleType Leq Peak Hour Leq Day Leq Evening Leq Night CNELLdn
48.2 46.3 44.6 38.5 47.847.1
42.7
44.9
41.2 34.8 33.3 42.041.7
43.5 34.5 35.7 44.244.1
Vehicle Noise:50.7 49.0 45.4 41.1 50.149.7
71.09
77.24
59.44
Road Grade:0.0%
feet
Saturday, October 12, 2019
PA2019-249
APPENDIX 9.1:
OPERATIONAL NOISE LEVEL CALCULATIONS
PA2019-249
This page intentionally left blank
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Air Conditioning Unit (Roof-Top)
5.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
101.0Noise Distance to Observer
feet
feet
Noise Source Elevation:50.0
Observer Elevation:25.0 feet
feet
Barrier Height:5.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
96.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
78.274.4
L25
76.1
L2
77.7
L8
77.477.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-26.1-26.1 -26.1 -26.1-26.1-26.1101.0Distance Attenuation
45.741.9 43.6 45.244.944.7
5.0Shielding (Barrier Attenuation)-6.4-6.4 -6.4 -6.4-6.4-6.4
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R1
43.840.0 41.7 43.343.042.839
Condition:Operational
Barrier Elevation:50.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Trash Enclosure Activity
57.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
185.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:25.0 feet
feet
Barrier Height:35.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
128.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
88.569.0
L25
75.0
L2
87.0
L8
82.077.3
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-31.4-31.4 -31.4 -31.4-31.4-31.4185.0Distance Attenuation
40.120.6 26.6 38.633.628.9
57.0Shielding (Barrier Attenuation)-17.0-17.0 -17.0 -17.0-17.0-17.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R1
35.315.8 21.8 33.828.824.120
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Parking Lot Veh. Movements
145.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
145.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:25.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:15.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
71.949.0
L25
50.0
L2
61.0
L8
55.052.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
10.0Reference (Sample)
-17.4-17.4 -17.4 -17.4-17.4-17.4145.0Distance Attenuation
54.531.6 32.6 43.637.634.8
145.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R1
54.531.6 32.6 43.637.634.860
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Air Conditioning Unit (Roof-Top)
5.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
146.0Noise Distance to Observer
feet
feet
Noise Source Elevation:50.0
Observer Elevation:38.0 feet
feet
Barrier Height:5.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
141.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
78.274.4
L25
76.1
L2
77.7
L8
77.477.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-29.3-29.3 -29.3 -29.3-29.3-29.3146.0Distance Attenuation
43.739.9 41.6 43.242.942.7
5.0Shielding (Barrier Attenuation)-5.2-5.2 -5.2 -5.2-5.2-5.2
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R2
41.838.0 39.7 41.341.040.839
Condition:Operational
Barrier Elevation:50.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Trash Enclosure Activity
133.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
133.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:38.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
88.569.0
L25
75.0
L2
87.0
L8
82.077.3
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-28.5-28.5 -28.5 -28.5-28.5-28.5133.0Distance Attenuation
60.040.5 46.5 58.553.548.8
133.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R2
55.235.7 41.7 53.748.744.020
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Parking Lot Veh. Movements
63.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
63.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:38.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:15.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
71.949.0
L25
50.0
L2
61.0
L8
55.052.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
10.0Reference (Sample)
-12.0-12.0 -12.0 -12.0-12.0-12.063.0Distance Attenuation
59.937.0 38.0 49.043.040.2
63.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R2
59.937.0 38.0 49.043.040.260
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Air Conditioning Unit (Roof-Top)
5.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
291.0Noise Distance to Observer
feet
feet
Noise Source Elevation:50.0
Observer Elevation:67.0 feet
feet
Barrier Height:5.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
286.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
78.274.4
L25
76.1
L2
77.7
L8
77.477.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-35.3-35.3 -35.3 -35.3-35.3-35.3291.0Distance Attenuation
37.834.0 35.7 37.337.036.8
5.0Shielding (Barrier Attenuation)-5.1-5.1 -5.1 -5.1-5.1-5.1
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R3
35.932.1 33.8 35.435.134.939
Condition:Operational
Barrier Elevation:50.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Trash Enclosure Activity
277.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
277.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:67.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
88.569.0
L25
75.0
L2
87.0
L8
82.077.3
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-34.9-34.9 -34.9 -34.9-34.9-34.9277.0Distance Attenuation
53.634.1 40.1 52.147.142.4
277.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R3
48.829.3 35.3 47.342.337.620
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Parking Lot Veh. Movements
205.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
205.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:67.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:15.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
71.949.0
L25
50.0
L2
61.0
L8
55.052.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
10.0Reference (Sample)
-19.7-19.7 -19.7 -19.7-19.7-19.7205.0Distance Attenuation
52.229.3 30.3 41.335.332.5
205.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R3
52.229.3 30.3 41.335.332.560
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Air Conditioning Unit (Roof-Top)
5.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
58.0Noise Distance to Observer
feet
feet
Noise Source Elevation:50.0
Observer Elevation:18.0 feet
feet
Barrier Height:5.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
53.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
78.274.4
L25
76.1
L2
77.7
L8
77.477.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-21.3-21.3 -21.3 -21.3-21.3-21.358.0Distance Attenuation
47.844.0 45.7 47.347.046.8
5.0Shielding (Barrier Attenuation)-9.1-9.1 -9.1 -9.1-9.1-9.1
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R4
45.942.1 43.8 45.445.144.939
Condition:Operational
Barrier Elevation:50.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Trash Enclosure Activity
17.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
73.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:18.0 feet
feet
Barrier Height:35.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
56.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
88.569.0
L25
75.0
L2
87.0
L8
82.077.3
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-23.3-23.3 -23.3 -23.3-23.3-23.373.0Distance Attenuation
46.627.1 33.1 45.140.135.4
17.0Shielding (Barrier Attenuation)-18.6-18.6 -18.6 -18.6-18.6-18.6
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R4
41.822.3 28.3 40.335.330.620
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Parking Lot Veh. Movements
90.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
90.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:18.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:15.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
71.949.0
L25
50.0
L2
61.0
L8
55.052.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
10.0Reference (Sample)
-14.3-14.3 -14.3 -14.3-14.3-14.390.0Distance Attenuation
57.634.7 35.7 46.740.737.9
90.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R4
57.634.7 35.7 46.740.737.960
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Air Conditioning Unit (Roof-Top)
5.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
61.0Noise Distance to Observer
feet
feet
Noise Source Elevation:50.0
Observer Elevation:20.0 feet
feet
Barrier Height:5.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
56.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
78.274.4
L25
76.1
L2
77.7
L8
77.477.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-21.7-21.7 -21.7 -21.7-21.7-21.761.0Distance Attenuation
47.844.0 45.7 47.347.046.8
5.0Shielding (Barrier Attenuation)-8.7-8.7 -8.7 -8.7-8.7-8.7
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R5
45.942.1 43.8 45.445.144.939
Condition:Operational
Barrier Elevation:50.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Trash Enclosure Activity
41.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
166.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:20.0 feet
feet
Barrier Height:35.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
125.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
88.569.0
L25
75.0
L2
87.0
L8
82.077.3
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
5.0Reference (Sample)
-30.4-30.4 -30.4 -30.4-30.4-30.4166.0Distance Attenuation
40.621.1 27.1 39.134.129.4
41.0Shielding (Barrier Attenuation)-17.5-17.5 -17.5 -17.5-17.5-17.5
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R5
35.816.3 22.3 34.329.324.620
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH
Job Number:12954
Analyst:B. Lawson
Source:Parking Lot Veh. Movements
143.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
143.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:20.0 feet
feet
Barrier Height:0.0
Noise Source Height:5.0 feet
feet
Drop Off Coefficient:15.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
0.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
71.949.0
L25
50.0
L2
61.0
L8
55.052.2
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
10.0Reference (Sample)
-17.3-17.3 -17.3 -17.3-17.3-17.3143.0Distance Attenuation
54.631.7 32.7 43.737.734.9
143.0Shielding (Barrier Attenuation)0.00.0 0.0 0.00.00.0
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R5
54.631.7 32.7 43.737.734.960
Condition:Operational
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
APPENDIX 10.1:
CONSTRUCTION NOISE LEVEL CALCULATIONS
PA2019-249
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PA2019-249
Project Name:2510 PCH Mixed-Use
Job Number:12954
Analyst:B. Lawson
Source:Grading Activities
10.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
97.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:25.0 feet
feet
Barrier Height:16.0
Noise Source Height:8.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
87.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
84.875.7
L25
78.5
L2
83.7
L8
82.077.9
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
50.0Reference (Sample)
-5.8-5.8 -5.8 -5.8-5.8-5.897.0Distance Attenuation
65.556.4 59.2 64.462.758.6
10.0Shielding (Barrier Attenuation)-13.5-13.5 -13.5 -13.5-13.5-13.5
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R1
65.556.4 59.2 64.462.758.660
Condition:Construction
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH Mixed-Use
Job Number:12954
Analyst:B. Lawson
Source:Grading Activities
10.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
69.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:38.0 feet
feet
Barrier Height:16.0
Noise Source Height:8.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
59.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
84.875.7
L25
78.5
L2
83.7
L8
82.077.9
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
50.0Reference (Sample)
-2.8-2.8 -2.8 -2.8-2.8-2.869.0Distance Attenuation
70.661.5 64.3 69.567.863.7
10.0Shielding (Barrier Attenuation)-11.4-11.4 -11.4 -11.4-11.4-11.4
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R2
70.661.5 64.3 69.567.863.760
Condition:Construction
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH Mixed-Use
Job Number:12954
Analyst:B. Lawson
Source:Grading Activities
10.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
217.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:67.0 feet
feet
Barrier Height:16.0
Noise Source Height:8.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
207.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
84.875.7
L25
78.5
L2
83.7
L8
82.077.9
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
50.0Reference (Sample)
-12.7-12.7 -12.7 -12.7-12.7-12.7217.0Distance Attenuation
60.951.8 54.6 59.858.154.0
10.0Shielding (Barrier Attenuation)-11.2-11.2 -11.2 -11.2-11.2-11.2
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R3
60.951.8 54.6 59.858.154.060
Condition:Construction
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
Project Name:2510 PCH Mixed-Use
Job Number:12954
Analyst:B. Lawson
Source:Grading Activities
10.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
37.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:18.0 feet
feet
Barrier Height:16.0
Noise Source Height:8.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
27.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
84.875.7
L25
78.5
L2
83.7
L8
82.077.9
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
50.0Reference (Sample)
2.62.6 2.6 2.62.62.637.0Distance Attenuation
71.962.8 65.6 70.869.165.0
10.0Shielding (Barrier Attenuation)-15.5-15.5 -15.5 -15.5-15.5-15.5
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R4
71.962.8 65.6 70.869.165.060
Condition:Construction
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
Project Name:2510 PCH Mixed-Use
Job Number:12954
Analyst:B. Lawson
Source:Grading Activities
10.0
NOISE MODEL INPUTS
Noise Distance to Barrier:
67.0Noise Distance to Observer
feet
feet
Noise Source Elevation:20.0
Observer Elevation:20.0 feet
feet
Barrier Height:16.0
Noise Source Height:8.0 feet
feet
Drop Off Coefficient:20.0
20 = 6 dBA per doubling of distance
15 = 4.5 dBA per doubling of distance
57.0Barrier Distance to Observer:feet
Barrier Type (0-Wall, 1-Berm):0
Leq LmaxL50
84.875.7
L25
78.5
L2
83.7
L8
82.077.9
Noise Level
NOISE MODEL PROJECTIONS
Distance (feet)
50.0Reference (Sample)
-2.5-2.5 -2.5 -2.5-2.5-2.567.0Distance Attenuation
68.058.9 61.7 66.965.261.1
10.0Shielding (Barrier Attenuation)-14.3-14.3 -14.3 -14.3-14.3-14.3
Raw (Distance + Barrier)
Observer Height:5.0 feet
Observer Location:R5
68.058.9 61.7 66.965.261.160
Condition:Construction
Barrier Elevation:20.0 feet
Minute Hourly Adjustment
STATIONARY SOURCE NOISE PREDICTION MODEL 10/13/2019
PA2019-249
This page intentionally left blank
PA2019-249