HomeMy WebLinkAboutAttachment 3a-14 - Noise Impact StudyShinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA
517 Shinohara Lane
Prepared for:
VWP-OP Nirvana Owner, LLC
Mr. Steven Schawtz
2390 E Camelback Road, Suite 305
Phoenix, AZ 85016
Prepared by:
MD Acoustics, LLC
Robert Pearson
Francisco Irarrazabal
Claire Pincock
1197 Los Angeles Avenue, Ste 256
Simi Valley, CA 93065
Date: 12/6/2022
APPENDIX M
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Table of Contents
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TABLE OF CONTENTS
1.0 Introduction .................................................................................................................................... 1
1.1 Purpose of Analysis and Study Objectives 1
1.2 Site Location and Study Area 1
1.3 Proposed Project Description 1
2.0 Fundamentals of Noise ................................................................................................................... 5
2.1 Sound, Noise and Acoustics 5
2.2 Frequency and Hertz 5
2.3 Sound Pressure Levels and Decibels 5
2.4 Addition of Decibels 5
2.5 Human Response to Changes in Noise Levels 6
2.6 Noise Descriptors 6
2.7 Traffic Noise Prediction 7
2.8 Sound Propagation 7
3.0 Ground-Borne Vibration Fundamentals ......................................................................................... 9
3.1 Vibration Descriptors 9
3.2 Vibration Perception 9
3.3 Vibration Propagation 9
4.0 Regulatory Setting ......................................................................................................................... 10
4.1 Federal Regulations 10
4.2 State Regulations 10
4.3 City of Chula Vista Noise Regulations 11
5.0 Study Method and Procedure ....................................................................................................... 14
5.1 Noise Measurement Procedure and Criteria 14
5.2 Noise Measurement Locations 14
5.3 Stationary Noise Modeling 14
5.4 FHWA Traffic Noise Prediction Model 15
5.5 FHWA Roadway Construction Noise Model 16
6.0 Existing Noise Environment .......................................................................................................... 18
6.1 Long-Term Noise Measurement Results 18
7.0 Future Noise Environment Impacts .............................................................................................. 19
7.1 Future Exterior Noise 19
7.1.1 Noise Impacts to Off-Site Receptors Due to Stationary Sources 19
7.1.2 Noise Impacts to On/Off-Site Receptors Due to Project Generated
Traffic 22
7.1.3 Noise Impacts to On/Off-Site Receptors Due to Project
Maintenance Equipment 24
8.0 Construction Noise Impact ........................................................................................................... 25
8.1 Construction Noise 25
8.2 Construction Vibration 26
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8.3 Construction Noise Reduction Policies 27
9.0 References .................................................................................................................................... 28
LIST OF APPENDICES
Appendix A: Photographs and Field Measurement Data ....................................................................... 1
Appendix B: Reference Sound Level ...................................................................................................... 2
Appendix C: SoundPlan Input/Output .................................................................................................... 3
Appendix D: Traffic Noise Modeling Output .......................................................................................... 4
Appendix E: Construction Noise Modeling Output ................................................................................ 5
Appendix F: Concept Grading ................................................................................................................ 6
Appendix G: Cumulative Project Analysis ............................................................................................... 7
LIST OF EXHIBITS
Exhibit A: Location Map ..................................................................................................................... 3
Exhibit B: Site Plan .............................................................................................................................. 4
Exhibit C: Typical A-Weighted Noise Levels ....................................................................................... 5
Exhibit D: Land Use Compatibility Guidelines .................................................................................. 12
Exhibit E: Measurement Locations .................................................................................................. 17
Exhibit F: Operational Noise Levels Leq(h) ...................................................................................... 20
Exhibit G: Operational Noise Levels Leq(h) 3D Rendering ............................................................... 21
LIST OF TABLES
Table 1: Table III Exterior Noise Limits1,2 .................................................................................................. 11
Table 2: Table IV Maximum permissible dwelling interior sound levels .................................................. 11
Table 3: Reference Sound Level Measurements for SoundPlan Model ................................................... 15
Table 4: Roadway Parameters and Vehicle Distribution .......................................................................... 16
Table 5: Long-Term 24-Hrs Noise Measurement Data1 ............................................................................ 18
Table 6: Worst-case Predicted Operational Leq ....................................................................................... 22
Table 7: Change in Noise Level Characteristics1 ....................................................................................... 22
Table 8: Existing Scenario - Noise Levels Along Roadways (dBA CNEL) .................................................... 24
Table 9: Typical Construction Equipment Noise Levels1 ........................................................................... 25
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Table 10: Guideline Vibration Damage Potential Threshold Criteria ....................................................... 26
Table 11: Vibration Source Levels for Construction Equipment ............................................................... 27
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Introduction
1
1.0 Introduction
1.1 Purpose of Analysis and Study Objectives
The purpose of this noise impact study is to evaluate the potential noise impacts for the project study
area and compare results to City and CEQA thresholds. The assessment was conducted and compared
to the noise standards set forth by the Federal, State and Local agencies. Consistent with the California
Environmental Quality Act (CEQA) and CEQA Guidelines, a significant impact related to noise would occur
if a proposed project is determined to result in:
Exposure of persons to or generation of noise levels in excess of standards established in the local
General Plan or noise ordinance, or applicable agencies.
Exposure of persons to or generation of excessive ground-borne vibration or ground-borne noise
levels.
A substantial permanent increase in ambient noise levels in the project vicinity above levels
existing without the project.
A substantial temporary or periodic increase in ambient noise levels in the project vicinity above
levels existing without the project.
The following is provided in this report:
A description of the study area and the proposed project
Information regarding the fundamentals of noise
A description of the local noise guidelines and standards
An evaluation of the existing ambient noise environment
An analysis of stationary noise impacts from the project site to adjacent land uses
Construction noise and vibration evaluation
1.2 Site Location and Study Area
The project site is located at 517 Shinohara Lane near Main Street between Oleander Avenue and
Brandywine Avenue in the City of Chula Vista, San Diego County, California as shown in Exhibit A. The
site is currently designated Limited Industrial (IL) according to the City of Chula Vista General Plan Land
Use Diagram and the proposed use is industrial. Land uses surrounding the site include Residential to
the north and west, and Industrial to the south and east.
1.3 Proposed Project Description
The approximately 9.72-acre project site is proposed to be develop with a 168,926 square foot
warehouse and distribution center with 4,506 square feet of office space and 4,724 square feet of
mezzanine space. The parking lot proposed considers 221 total spaces, between regular, accessible, and
electric cars spaces. Finally, the project proposes 25 loading docks on the east side. Exhibit B
demonstrates the site plan for the project.
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City of Chula Vista, CA Introduction
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The closest existing sensitive receptors (to the site area) are the residential condominiums (multi-family)
located approximately 40 feet to the north and the single-family residential uses located approximately
30 feet to the west of property line. These receivers are considered regarding the noise propagation.
Shinohara Industrial Project
Noise Impact Study
City of Chula Vista, CA
Exhibit A
Location Map
SITE
Introduction
Tecnico
Corp
TransAmerican
Juiced
Bikes
Jump Around
now trampoline
Surgical
Specialties
Corp.
Crash
Champions
Collision
Repair
Jabil
3
Exhibit B
Site Plan
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Shinohara Industrial Center Project
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City of Chula Vista, CA Fundamentals of Noise
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2.0 Fundamentals of Noise
This section of the report provides basic information about noise and presents some of the terms used
in the report.
2.1 Sound, Noise and Acoustics
Sound is a disturbance created by a moving or vibrating source and is capable of being detected by the
hearing organs. Sound may be thought of as mechanical energy of a moving object transmitted by
pressure waves through a medium to a human ear. For traffic or stationary noise, the medium of concern
is air. Noise is defined as sound that is loud, unpleasant, unexpected, or unwanted.
2.2 Frequency and Hertz
A continuous sound is described by its frequency
(pitch) and its amplitude (loudness). Frequency
relates to the number of pressure oscillations per
second. Low-frequency sounds are low in pitch (bass
sounding) and high-frequency sounds are high in
pitch (squeak). These oscillations per second (cycles)
are commonly referred to as Hertz (Hz). The human
ear can hear from the bass pitch starting out at 20 Hz
all the way to the high pitch of 20,000 Hz.
2.3 Sound Pressure Levels and Decibels
The amplitude of a sound determines its loudness.
The loudness of sound increases or decreases as the
amplitude increases or decreases. Sound pressure
amplitude is measured in units of micro-Newton per
square inch meter (µN/m2), also called micro-Pascal
(µPa). One µPa is approximately one hundred
billionths (0.00000000001) of normal atmospheric
pressure. Sound pressure level (SPL or Lp) is used to
describe in logarithmic units the ratio of actual
sound pressures to a reference pressure squared.
These units are called decibels, abbreviated dB.
Exhibit C illustrates references sound levels for different noise sources.
2.4 Addition of Decibels
Because decibels are on a logarithmic scale, sound pressure levels cannot be added or subtracted by
simple plus or minus addition. When two sounds or equal SPL are combined, they will produce an SPL 3
dB greater than the original single SPL. In other words, sound energy must be doubled to produce a 3 dB
increase. If two sounds differ by approximately 10 dB, the higher sound level is the predominant sound.
Exhibit C: Typical A-Weighted Noise Levels
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2.5 Human Response to Changes in Noise Levels
In general, the healthy human ear is most sensitive to sounds between 1,000 Hz and 5,000 Hz, and it
perceives a sound within that range as being more intense than a sound with a higher or lower frequency
with the same magnitude. For purposes of this report as well as with most environmental documents,
the A-scale weighting is typically reported in terms of A-weighted decibel (dBA), a scale designed to
account for the frequency-dependent sensitivity of the ear. Typically, the human ear can barely perceive
a change in noise level of 3 dB. A change in 5 dB is readily perceptible, and a change in 10 dB is perceived
as being twice or half as loud. As previously discussed, a doubling of sound energy results in a 3 dB
increase in sound, which means that a doubling of sound energy (e.g. doubling the volume of traffic on
a highway) would result in a barely perceptible change in sound level.
2.6 Noise Descriptors
Noise in our daily environment fluctuates over time. Some noise levels occur in regular patterns, others
are random. Some noise levels are constant while others are sporadic. Noise descriptors were created
to describe the different time-varying noise levels.
A-Weighted Sound Level: The sound pressure level in decibels as measured on a sound level meter using
the A-weighted filter network. The A-weighting filter de-emphasizes the very low and very high-frequency
components of the sound in a manner similar to the response of the human ear. A numerical method of
rating human judgment of loudness.
Ambient Noise Level: The composite of noise from all sources, near and far. In this context, the ambient
noise level constitutes the normal or existing level of environmental noise at a given location.
Community Noise Equivalent Level (CNEL): The average equivalent A-weighted sound level during a 24-
hour day, obtained after addition of five (5) decibels to sound levels in the evening from 7:00 to 10:00 PM
and after addition of ten (10) decibels to sound levels in the night before 7:00 AM and after 10:00 PM.
Decibel (dB): A unit for measuring the amplitude of a sound, equal to 20 times the logarithm to the base
10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micro-pascals.
dB(A): A-weighted sound level (see definition above).
Equivalent Sound Level (LEQ): The sound level corresponding to a steady noise level over a given sample
period with the same amount of acoustic energy as the actual time-varying noise level. The energy average
noise level during the sample period.
Habitable Room: Any room meeting the requirements of the Uniform Building Code, or other applicable
regulations, which is intended to be used for sleeping, living, cooking or dining purposes, excluding such
enclosed spaces as closets, pantries, bath or toilet rooms, service rooms, connecting corridors, laundries,
unfinished attics, foyers, storage spaces, cellars, utility rooms and similar spaces.
L(n): The A-weighted sound level exceeded during a certain percentage of the sample time. For example,
L10 in the sound level exceeded 10 percent of the sample time. Similarly L50, L90, and L99, etc.
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Noise: Any unwanted sound or sound which is undesirable because it interferes with speech and hearing,
or is intense enough to damage hearing, or is otherwise annoying. The State Noise Control Act defines
noise as "...excessive undesirable sound...".
Outdoor Living Area: Outdoor spaces that are associated with residential land uses typically used for
passive recreational activities or other noise-sensitive uses. Such spaces include patio areas, barbecue
areas, jacuzzi areas, etc. associated with residential uses; outdoor patient recovery or resting areas
associated with hospitals, convalescent hospitals, or rest homes; outdoor areas associated with places of
worship which have a significant role in services or other noise-sensitive activities; and outdoor school
facilities routinely used for educational purposes which may be adversely impacted by noise. Outdoor
areas usually not included in this definition are: front yard areas, driveways, greenbelts, maintenance
areas and storage areas associated with residential land uses; exterior areas at hospitals that are not used
for patient activities; outdoor areas associated with places of worship and principally used for short-term
social gatherings; and, outdoor areas associated with school facilities that are not typically associated with
educational uses prone to adverse noise impacts (for example, school play yard areas).
Percent Noise Levels: See L(n).
Sound Level (Noise Level): The weighted sound pressure level obtained by use of a sound level meter
having a standard frequency filter for attenuating part of the sound spectrum.
Sound Level Meter: An instrument, including a microphone, an amplifier, an output meter, and frequency
weighting networks for the measurement and determination of noise and sound levels.
Single Event Noise Exposure Level (SENEL): The dB(A) level which, if it lasted for one second, would
produce the same A-weighted sound energy as the actual event.
2.7 Traffic Noise Prediction
Noise levels associated with traffic depends on a variety of factors: (1) volume of traffic, (2) speed of
traffic, (3) auto, medium truck (2–3 axle) and heavy truck percentage (4 axle and greater), and sound
propagation. The greater the volume of traffic, higher speeds and truck percentages equate to a louder
volume in noise. A doubling of the Average Daily Traffic (ADT) along a roadway will increase noise levels
by approximately 3 dB; reasons for this are discussed in the sections above.
2.8 Sound Propagation
As sound propagates from a source it spreads geometrically. Sound from a small, localized source (i.e., a
point source) radiates uniformly outward as it travels away from the source in a spherical pattern. The
sound level attenuates at a rate of 6 dB per doubling of distance. The movement of vehicles down a
roadway makes the source of the sound appear to propagate from a line (i.e., line source) rather than a
point source. This line source results in the noise propagating from a roadway in a cylindrical spreading
versus a spherical spreading that results from a point source. The sound level attenuates for a line source
at a rate of 3 dB per doubling of distance.
As noise propagates from the source, it is affected by the ground and atmosphere. Noise models use
hard site (reflective surfaces) and soft site (absorptive surfaces) to help calculate predicted noise levels.
Hard site conditions assume no excessive ground absorption between the noise source and the receiver.
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Soft site conditions such as grass, soft dirt or landscaping attenuate noise at a rate of 1.5 dB per doubling
of distance. When added to the geometric spreading, the excess ground attenuation results in an overall
noise attenuation of 4.5 dB per doubling of distance for a line source and 7.5 dB per doubling of distance
for a point source.
Research has demonstrated that atmospheric conditions can have a significant effect on noise levels
when noise receivers are located 200 feet from a noise source. Wind, temperature, air humidity, and
turbulence can further impact have far sound can travel.
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City of Chula Vista, CA Ground-Borne Vibration Fundamentals
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3.0 Ground-Borne Vibration Fundamentals
3.1 Vibration Descriptors
Ground-borne vibrations consist of rapidly fluctuating motions within the ground that have an average
motion of zero. The effects of ground-borne vibrations typically only cause a nuisance to people, but at
extreme vibration levels, damage to buildings may occur. Although ground-borne vibration can be felt
outdoors, it is typically only an annoyance to people indoors where the associated effects of the shaking
of a building can be notable. Ground-borne noise is an effect of ground-borne vibration and only exists
indoors since it is produced from noise radiated from the motion of the walls and floors of a room and
may also consist of the rattling of windows or dishes on shelves.
Several different methods are used to quantify vibration amplitude.
PPV – Known as the peak particle velocity (PPV) which is the maximum instantaneous peak in vibration
velocity, typically given in inches per second.
RMS – Known as root mean squared (RMS) can be used to denote vibration amplitude
VdB – A commonly used abbreviation to describe the vibration level (VdB) for a vibration source.
3.2 Vibration Perception
Typically, developed areas are continuously affected by vibration velocities of 50 VdB or lower. These
continuous vibrations are not noticeable to humans whose threshold of perception is around 65 VdB.
Outdoor sources that may produce perceptible vibrations are usually caused by construction equipment,
steel-wheeled trains, and traffic on rough roads, while smooth roads rarely produce perceptible ground-
borne noise or vibration. To counter the effects of ground-borne vibration, the Federal Transit
Administration (FTA) has published guidance relative to vibration impacts. According to the FTA, fragile
buildings can be exposed to ground-borne vibration levels of 0.3 inches per second without experiencing
structural damage.
3.3 Vibration Propagation
There are three main types of vibration propagation: surface, compression, and shear waves. Surface
waves, or Rayleigh waves, travel along the ground’s surface. These waves carry most of their energy
along an expanding circular wavefront, similar to ripples produced by throwing a rock into a pool of
water. P-waves, or compression waves, are body waves that carry their energy along an expanding
spherical wavefront. The particle motion in these waves is longitudinal (i.e., in a “push-pull” fashion). P-
waves are analogous to airborne sound waves. S-waves, or shear waves, are also body waves that carry
energy along an expanding spherical wavefront. However, unlike P-waves, the particle motion is
transverse, or side-to-side and perpendicular to the direction of propagation.
As vibration waves propagate from a source, the vibration energy decreases in a logarithmic nature and
the vibration levels typically decrease by 6 VdB per doubling of the distance from the vibration source.
As stated above, this drop-off rate can vary greatly depending on the soil but has been shown to be
effective enough for screening purposes, in order to identify potential vibration impacts that may need
to be studied through actual field tests.
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4.0 Regulatory Setting
The proposed project is located in the City of Chula Vista, California and noise regulations are addressed
through the efforts of various federal, state and local government agencies. The agencies responsible
for regulating noise are discussed below.
4.1 Federal Regulations
The adverse impact of noise was officially recognized by the federal government in the Noise Control Act
of 1972, which serves three purposes:
Publicize noise emission standards for interstate commerce
Assist state and local abatement efforts
Promote noise education and research
The Federal Office of Noise Abatement and Control (ONAC) originally was tasked with implementing the
Noise Control Act. However, it was eventually eliminated leaving other federal agencies and committees
to develop noise policies and programs. Some examples of these agencies are as follows: The
Department of Transportation (DOT) assumed a significant role in noise control through its various
agencies. The Federal Aviation Agency (FAA) is responsible for regulating noise from aircraft and airports.
The Federal Highway Administration (FHWA) is responsible for regulating noise from the interstate
highway system. The Occupational Safety and Health Administration (OSHA) is responsible for the
prohibition of excessive noise exposure to workers. The Housing and Urban Development (HUD) is
responsible for establishing noise regulations as it relates to exterior/interior noise levels for new HUD-
assisted housing developments near high noise areas.
The federal government advocates that local jurisdictions use their land use regulatory authority to
arrange new development in such a way that “noise sensitive” uses are either prohibited from being
constructed adjacent to a highway or, or alternatively that the developments are planned and
constructed in such a manner that potential noise impacts are minimized.
Since the federal government has preempted the setting of standards for noise levels that can be emitted
by the transportation source, the City is restricted to regulating the noise generated by the
transportation system through nuisance abatement ordinances and land use planning.
4.2 State Regulations
Established in 1973, the California Department of Health Services Office of Noise Control (ONC) was
instrumental in developing regularity tools to control and abate noise for use by local agencies. One
significant model is the “Land Use Compatibility for Community Noise Environments Matrix.” The matrix
allows the local jurisdiction to clearly delineate compatibility of sensitive uses with various incremental
levels of noise.
The State of California has established noise insulation standards as outlined in Title 24 and the Uniform
Building Code (UBC) which in some cases requires acoustical analyses to outline exterior noise levels and
to ensure interior noise levels do not exceed the interior threshold. The State mandates that the
legislative body of each county and city adopt a noise element as part of its comprehensive general plan.
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The local noise element must recognize the land use compatibility guidelines published by the State
Department of Health Services. The City’s guidelines rank noise land use compatibility as illustrated in
Exhibit D.
4.3 City of Chula Vista Noise Regulations
The City of Chula Vista outlines their noise regulations and standards within the Municipal Code Chapter
19.68 and Chapter 9 of the Environmental Element of the City of Chula Vista General Plan.
City of Chula Vista Municipal Code
SEC. 19.68.030 – Exterior noise limits
19.68.030(A)(4) No person shall operate, or cause to be operated, any source of sound at any location
within the City or allow the creation of any noise on property owned, leased occupied or otherwise
controlled by such person which causes the noise level to exceed the environmental and/or nuisance
interpretation of the applicable limits given in Table III.
Table 1: Table III Exterior Noise Limits1,2
Sound Level Standards (dBA Leq*)
Receiving Land Use Category
Noise Level [dB(A)]
10 p.m. to 7 a.m. (Weekdays) 7 a.m. to 10 p.m. (Weekdays)
10 p.m. to 8 a.m. (Weekends) 8 a.m. to 10 p.m. (Weekends)
All residential (except multiple dwelling) 45 55
Multiple dwelling residential 50 60
Commercial 60 65
Light industry - I-R and I-L zone 70 70
Heavy industry – I zone 80 80
1 Environmental Noise – Leq in any hour
2 Nuisance Noise – Not to be exceeded any time. (Ord. 2790, 1999; Ord. 2276 § 2, 1988; Ord. 2101 § 3, 1985)
SEC. 19.68.040 – Interior noise limits.
No person shall operate, or cause to be operated, any source of sound within a residential dwelling unit
or allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such
person which causes the noise level when measured inside a neighboring receiving dwelling unit to
exceed the environmental and/or nuisance interpretation of the applicable limits given in Table IV.
Table 2: Table IV Maximum permissible dwelling interior sound levels
Noise Level [dB(A)]
Type of Land Use Time Interval Any time 1 min in 1 hr 5 min in 1 hr
Multifamily 10 pm – 7 am 45 40 35
Residential 7 am – 10 pm 55 50 45
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Sec. 19.68.060(C) - Exemptions.
Exemption from Exterior Noise Standards. The provisions of CVMC 19.68.030 shall not apply to
activities covered by the following sections:
(2) Construction/demolition.
City of Chula Vista General Plan
Chapter 9. Environmental from the City’s General Plan includes Section 3.5 Noise. Section 3.5.1 describes
noise planning and standards, and the exterior land use/noise compatibility guidelines. The City’s
guidelines rank noise land use compatibility as illustrated in Exhibit D.
Exhibit D: Land Use Compatibility Guidelines
The General Plan includes objectives and policies with the goal of protecting the community from noise
impacts.
Objective – E 21: Protect people from excessive noise through careful land use planning and the
incorporation of appropriate mitigation techniques
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E 21.1 Apply the exterior land use-noise compatibility guidelines listed in Table 9-2 of this
Environmental Element to new development, where applicable, and in light of project-specific
considerations
E 21.1 Where applicable, the assessment and mitigation of interior noise levels shall adhere to
the applicable requirements of the California Building Code with local amendments and other
applicable established City standards.
E 21.3 Promote the use of available technologies in building construction to improve noise
attenuation capacities.
E 21.4 Continue to implement and enforce the City's noise control ordinance.
Objective – E 22 Protect the community from the effects of transportation noise.
E 22.1 Work to stabilize traffic volumes in residential neighborhoods by limiting throughways and
by facilitating the use of alternative routes around, rather than through, Neighborhoods.
E 22.2 Explore the feasibility of using new technologies to minimize traffic noise, such as use of
rubberized asphalt in road surface materials.
E 22.3 Employ traffic calming measures, where appropriate, such as narrow roadways and on-
street parking, in commercial and mixed use districts.
E 22.4 Encourage walking; biking; carpooling; use of public transit; and other alternative modes
of transportation to minimize vehicular use and associated traffic noise.
E 22.5 Require projects to construct appropriate mitigation measures in order to attenuate
existing and projected traffic noise levels, in accordance with applicable standards, including the
exterior land use/noise compatibility guidelines listed in Table 9-2 of this Environmental Element.
Brown Field Airport
The project is located in Area 2 of the Brown Field Airport Land Use Compatibility. However, the project
is outside the noise contours of the Brown Field Airport and will not be impacted by the airport.
Construction
Section 17.24.040 (C)(8) states that the use of any tools, power machinery, or equipment or the conduct
of construction and building work in residential zones so as to cause noises disturbing to the peace,
comfort, and quiet enjoyment of property of any person residing or working in the vicinity between the
hours of 10:00 p.m. and 7:00 a.m., Monday through Friday, and between the hours of 10:00 p.m. and
8:00 a.m., Saturday and Sunday, except when the work is necessary for emergency repairs required for
the health and safety of any member of the community;
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5.0 Study Method and Procedure
The following section describes the noise modeling procedures and assumptions used for this
assessment.
5.1 Noise Measurement Procedure and Criteria
Noise measurements are taken to determine the existing noise levels. A noise receiver or receptor is any
location in the noise analysis in which noise might produce an impact. The following criteria are used to
select measurement locations and receptors:
Locations expected to receive the highest noise impacts, such as the first row of houses
Locations that are acoustically representative and equivalent of the area of concern
Human land usage
Sites clear of major obstruction and contamination
MD conducted the sound level measurements in accordance to Federal Highway Transportation (FHWA)
and Caltrans (TeNS) technical noise specifications. All measurement equipment meets American National
Standards Institute (ANSI) specifications for sound level meters (S1.4-1983 identified in Chapter
19.68.020.AA). The following gives a brief description of the Caltrans Technical Noise Supplement
procedures for sound level measurements:
Microphones for sound level meters were placed 5-feet above the ground for all measurements
Sound level meters were calibrated (Larson Davis CAL 200) before and after each measurement
Following the calibration of equipment, a windscreen was placed over the microphone
Frequency weighting was set on “A” and slow response
Results of the long-term noise measurements were recorded on field data sheets
During any short-term noise measurements, any noise contaminations such as barking dogs, local
traffic, lawn mowers, or aircraft fly-overs were noted
Temperature and sky conditions were observed and documented
5.2 Noise Measurement Locations
Noise monitoring locations were selected based on the nearest sensitive receptors relative to the proposed
onsite noise sources. Three (3) long-term 24-hours noise measurements were conducted at or near the
project site and are illustrated in Exhibit E. Appendix A includes photos, field sheet, and measured noise
data.
5.3 Stationary Noise Modeling
SoundPLAN (SP) acoustical modeling software was utilized to model future worst-case stationary noise
impacts to the adjacent land uses. SP is capable of evaluating multiple stationary noise source impacts at
various receiver locations. SP’s software utilizes algorithms (based on the inverse square law and reference
equipment noise level data) to calculate noise level projections. The software allows the user to input
specific noise sources, spectral content, sound barriers, building placement, topography, and sensitive
receptor locations.
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The future worst-case noise level projections were modeled using referenced sound level data for the
various stationary on-site sources (parking spaces, truck loading dock with an idling semi-truck, and truck
climbing over the entrance ramp). The model assumes approximately 221 parking spaces and 25 loading
docks on the east side of the building. Additionally, the topography of the site is included, which involves
the elevations for noise sources and receivers and the project retaining and screening walls. The project
retaining and screening walls include a six (6) foot tall wall on the northwest corner of the site as shown
in detail in Appendix F Concept Grading for the project.
Each idling truck was located at the loading docks 10 feet over the ground and calibrated to 74 dBA
sound power level. The idling time was set to 5 minutes every hour. Also, each idling truck includes a
reverse siren running for 5 minutes every hour. The access ramp was modeled with 20 heavy trucks
passing by every hour. In addition, the parking lot was modeled with 1 car movement per parking space
per hour. Finally, typical HVAC equipment was included as a point source over the roof of the office
areas. Although the HVAC equipment has not been defined at this point, it was included as an example.
The reference sound level data is provided in Appendix B and the model sources summary is in Table 3.
Table 3: Reference Sound Level Measurements for SoundPlan Model
Source Source Type Reference Level (Lw
dBA)
Descriptor
Idling Trucks Point Source 74 10 ft
Reverse Sirens Point Source 100 3 ft
Truck driving up the ramp Line Source 91 20 trucks per hr
Parking Area (SP Parking Tool) 77 1 car per hr
HVAC equipment Point 80 2 rooftop units
The SP model assumes that all noise sources are operating simultaneously (worst-case scenario), when
in actuality the noise will be intermittent and lower in noise level. SP modeling inputs and outputs are
provided in Appendix C.
5.4 FHWA Traffic Noise Prediction Model
Traffic noise from vehicular traffic was projected using a computer program that replicates the FHWA
Traffic Noise Prediction Model (FHWA-RD-77-108). The FHWA model predicts a noise level increment of
3 dB per doubling the traffic volume. Roadway volumes and percentages correspond to the project’s
traffic scoping agreement as prepared by Linscott, Law & Greenspan, Engineers, The City’s traffic counts,
and roadway classification.
The traffic study approach considers two scenarios; a warehouse use, and a distribution facility use.
Therefore, both noise impacts are presented. The warehouse use would generate 1,088 daily trips and
the distribution use would generate 4,881 daily trips. The referenced traffic data was screened out of
VMT analysis, and no further analysis is required. The traffic data is included in Appendix D.
Table 4 indicates the roadway parameters and vehicle distribution utilized for this study.
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Study Method and Procedure
16
Table 4: Roadway Parameters and Vehicle Distribution
Roadway Segment Existing ADT1
Existing Plus
Project ADT
Warehouse1
Existing Plus
Project ADT
Distribution1
Cumulative
Warehouse
Cumulative
Distribution
Speed
(MPH)
Site
Conditions
Brandywine
Ave
Shinohara Ln
to Main St 7,500 8,500 12,500 15,200 18,235 35 Hard
Vehicle Distribution (Truck Mix)2
Motor-Vehicle Type Daytime %
(7AM to 7 PM)
Evening %
(7 PM to 10 PM)
Night %
(10 PM to 7 AM)
Total % of
Traffic Flow
Automobiles 77.5 12.9 9.6 97.42
Medium Trucks 84.8 4.9 10.3 1.84
Heavy Trucks 86.5 2.7 10.8 0.74
Notes:
1 Traffic counts provided by LL&G Engineers. This model takes the total ADT and uses the vehicle distribution mix for the calculations.
2 Vehicle mix distribution per SANDAG.
5.5 FHWA Roadway Construction Noise Model
The construction noise analysis utilizes the Federal Highway Administration (FHWA) Roadway Construction
Noise Model (RNCM), together with several key construction parameters. Key inputs include distance to the
sensitive receiver, equipment usage, % usage factor, and baseline parameters for the project site.
The project was analyzed based on the different construction phases. Construction noise is expected to be
loudest during the grading, concrete and building phases of construction. The construction noise calculation
output worksheet is located in Appendix E. The following assumptions relevant to
short-term construction noise impacts were used:
It is estimated that construction will be carried out over an 18-month time period. Daily construction
hours are expected to be during allowable daytime hours per the City’s Municipal Code. The model
includes key inputs like distance to the sensitive receiver, equipment type and 40% usage factor.
Construction noise is expected to be the loudest during the grading, concrete, and building phases.
Exhibit E
Measurement Locations
Study Method and Procedure
#= long-term
Monitoring Location
Shinohara Industrial Project
Noise Impact Study
City of Chula Vista, CA
1
2
3
17
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Existing Noise Environment
18
6.0 Existing Noise Environment
Three (3) 24-hour ambient noise measurement were conducted at the project site. Noise measurements
were taken to determine the existing ambient noise levels. Noise data indicates that the industrial facility
along south property line and traffic from surrounding street and highways are the primary sources of
noise impacting the site and the surrounding area.
6.1 Long-Term Noise Measurement Results
To compare the equivalent ambient levels with the operational noise levels, the quietest hour of the day
was selected assuming the project will run 24-hours as a worst-case scenario. The quietest levels from the
long-term noise data for each location are presented in Table 5.
Table 5: Long-Term 24-Hrs Noise Measurement Data1
Noise data indicates that the equivalent noise level Leq for the quietest ambient noise levels (worst-case)
measured ranges from 43 to 59 dBA at the project site. Measurement location LT-1 represents an
industrial land use, and LT-2 & LT-3 represents residential uses. Additional field notes and photographs are
provided in Appendix A.
For this evaluation, MD has utilized the quietest level measured Leq and has compared the project’s
projected noise levels to this level.
Date Location Adjacent
Land use Label1 (See Exhibit E above) Leq (dBA)
7/2/2021 South Industrial LT-1 59
7/2/2021 West Residential LT-2 44
7/2/2021 North Residential LT-3 43
Notes:
1. Long-term noise monitoring locations (LT1, LT2, & LT3) are illustrated in Exhibit E. The quietest hourly night time noise interval is highlighted in
Orange when proje
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts
19
7.0 Future Noise Environment Impacts
This assessment analyzes future noise impacts as a result of the project. The analysis details the
estimated exterior noise levels. Stationary noise impacts are analyzed from the on-site noise sources
such as truck movement and parking lot.
7.1 Future Exterior Noise
The following outlines the exterior noise levels associated with the proposed project.
7.1.1 Noise Impacts to Off-Site Receptors Due to Stationary Sources
Sensitive receptors that may be affected by project operational noise includes residential uses to the
north and west. The worst-case stationary noise was modeled using SoundPLAN acoustical modeling
software.
For this study, project activities are assumed to be continuously operational when the noise is
intermittent in reality. As a worst-case scenario, the project evaluates the loading dock noise for a total
of twenty (25) trucks distributed over loading docks at the east side of the building. Besides, the entrance
ramp assumes 20 heavy trucks passing by every hour. Exhibit B shows the site plan with the layout. The
project assumes that the industrial facilities will be running 24-hours.
A total of four (4) receptors were modeled to evaluate the proposed project’s operational impact. A
receptor is denoted by a yellow dot. All yellow dots represent either a property line or a sensitive
receptor such as an outdoor sensitive area (courtyard, patio, backyard, etc).
This study compares the Project’s operational noise levels to two (2) different noise assessment
scenarios: 1) Project Only operational noise level projections, 2) Project plus ambient noise level
projections for the quietest hour of the day.
Project Operational Noise Levels
Exhibit F shows the “project only” operational noise levels at the site and illustrates how the noise will
propagate at the property lines and/or sensitive receptor area. Operational noise levels at the adjacent
uses are anticipated to range between 30 dBA to 41 dBA Leq (depending on the location). The model
also considered the elevations differences between the project site and the adjacent residential land
uses. Exhibit G shows the 3D rendering of the project site situation relative to the surrounding land uses.
Project Plus Ambient Operational Noise Levels
Table 6 demonstrates the project plus the ambient noise levels. Project plus ambient noise level
projections are anticipated to range between 44 to 59 dBA Leq depending on location.
Exhibit F
Operational Noise Levels Leq(h)
Future Noise Environment Impacts
Shinohara Industrial Project
Noise Impact Study
City of Chula Vista, CA
20
Exhibit G
Operational Noise Levels Leq(h) 3D Rendering
Future Noise Environment Impacts
Shinohara Industrial Project
Noise Impact Study
City of Chula Vista, CA
21
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts
22
Table 6: Worst-case Predicted Operational Leq
Receptor1 Floor
Existing
Ambient Noise
Level
(dBA, Leq)2
Project
Noise Level
(dBA, Leq)3
Total
Combined
Noise
Level
(dBA, Leq)
Daytime
(7AM – 10
PM)
Stationary
Noise Limit
(dBA,Leq)4
Nighttime
(10PM –
7AM)
Stationary
Noise Limit
(dBA, Leq)4
Change in
Noise Level
as Result
of Project
1 1 59 30 59 70 70 0
2 1 44 33 44 55 45 0
3 1 43 41 45 55 45 2
4 1 43 38 44 55 45 1
Notes:
1. Receptors 1 & 5 represents industrial, and receptor 2 thru 4 represents single family residential.
2.Existing ambient taken as 24-hour measurement.
3. See Exhibit F for the operational noise level projections at said receptors.
4. Per the city of Chula Vista municipal code 19.68.030(B)(4), if the Ambient level exceeds the limit the ambient becomes the limit.
As shown in Table 6, the project will meet the City’s standard of 45 dBA Leq for residential nighttime
operation and 70 dBA for industrial limit.
Table 7 provides the characteristics associated with changes in noise levels.
Table 7: Change in Noise Level Characteristics1
Changes in Intensity Level,
dBA
Changes in Apparent
Loudness
1 Not perceptible
3 Just perceptible
5 Clearly noticeable
10 Twice (or half) as loud
https://www.fhwa.dot.gov/environMent/noise/regulations_and_guidance/polguide/polguide02.cfm
The change in noise level at receivers would fall within the “Not Perceptible” to “Just perceptible”
acoustic characteristic for all receiver’s location in a worst-case scenario.
7.1.2 Noise Impacts to On/Off-Site Receptors Due to Project Generated Traffic
A worst-case project generated traffic noise level was modeled utilizing the FHWA Traffic Noise
Prediction Model - FHWA-RD-77-108. Traffic noise levels were calculated 50 feet from the centerline of
the analyzed roadway. The modeling is theoretical and does not take into account any existing barriers,
structures, and/or topographical features that may further reduce noise levels. Therefore, the levels are
shown for comparative purposes only to show the difference in with and without project conditions. In
addition, the noise contours for 60, 65 and 70 dBA CNEL were calculated. The potential off-site noise
impacts caused by an increase of traffic from operation of the proposed project on the nearby roadways
were calculated for the following scenarios:
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts
23
Existing Year (without Project): This scenario refers to existing year traffic noise conditions.
Existing Year (Plus Project Warehouse use): This scenario refers to existing year + project traffic noise
conditions for a warehouse building use.
Existing Year (Plus Project Distribution use): This scenario refers to existing year + project traffic noise
conditions for a distribution facility use.
Cumulative (Plus Project Warehouse use): This scenario refers to existing year + cumulative traffic +
project traffic noise conditions for a warehouse building use.
Cumulative (Plus Project Distribution use): This scenario refers to existing year + cumulative traffic +
project traffic noise conditions for a distribution facility use.
Table 8 compares the without and with project scenario and shows the change in traffic noise levels as
a result of the proposed project. It takes a change of 3 dB or more to hear a perceptible difference. As
demonstrated in Table 8, the project is anticipated to change the noise by 4 dBA CNEL in the worst-case
scenario.
Although there is an increase in traffic noise levels the impact is considered to have less than significant
impact as the noise levels at or near any existing proposed sensitive receptor would be 67.7 dBA CNEL
or less and the change in noise level is 4 dBA or less.
<Table 8, next page>
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts
24
Table 8: Existing Scenario - Noise Levels Along Roadways (dBA CNEL)
Existing Without Project Exterior Noise Levels
CNEL
at 50 Ft
(dBA)
Distance to Contour (Ft)
Roadway Segment 70 dBA
CNEL
65 dBA
CNEL
60 dBA
CNEL
55
dBA
CNEL
Brandywine Ave Shinohara Ln to Main St 63.9 12 39 122 385
Existing With Project Exterior Noise Levels
CNEL
at 50 Ft
(dBA)
Distance to Contour (Ft)
Roadway Segment Project Use 70 dBA
CNEL
65 dBA
CNEL
60 dBA
CNEL
55
dBA
CNEL
Brandywine Ave Shinohara Ln to Main St Warehouse 64.4 14 44 138 437
Brandywine Ave Shinohara Ln to Main St Distribution 66.1 20 64 203 642
Cumulative Projects Exterior Noise Levels
CNEL
at 50 Ft
(dBA)
Distance to Contour (Ft)
Roadway Segment Project Use 70 dBA
CNEL
65 dBA
CNEL
60 dBA
CNEL
55
dBA
CNEL
Brandywine Ave Shinohara Ln to Main St Warehouse 66.9 25 78 247 781
Brandywine Ave Shinohara Ln to Main St Distribution 67.7 30 94 296 937
Change in Existing Noise Levels as a Result of Project
CNEL at 50 Feet dBA2
Roadway1 Segment Project Use
Existing
Without
Project
Cumulative
Project
Change
in
Noise
Level
Potential
Significant
Impact
Brandywine Ave Shinohara Ln to Main St Warehouse 63.9 66.9 3.0 No
Brandywine Ave Shinohara Ln to Main St Distribution 63.9 67.7 3.8 No
Notes: 1 Exterior noise levels calculated at 5 feet above ground level. 2 Noise levels calculated from centerline of subject roadway. No sensitive receptors are located within 50 ft from the roadway centerline.
7.1.3 Noise Impacts to On/Off-Site Receptors Due to Project Maintenance
Equipment
Project maintenance activities such as parking lot sweeper machines and/or landscaping machinery
should not be used before 7 a.m. or after 10 p.m. or according to Section 17.24.040(C)(8).
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
25
8.0 Construction Noise Impact
The degree of construction noise may vary for different areas of the project site and also vary depending
on the construction activities. Noise levels associated with the construction will vary with the different
phases of construction.
8.1 Construction Noise
The Environmental Protection Agency (EPA) has compiled data regarding the noise generated
characteristics of typical construction activities. The data is presented in Table 9.
Table 9: Typical Construction Equipment Noise Levels 1
Type Lmax (dBA) at 50 Feet
Backhoe 80
Truck 88
Concrete Mixer 85
Pneumatic Tool 85
Pump 76
Saw, Electric 76
Air Compressor 81
Generator 81
Paver 89
Roller 74
Notes: 1 Referenced Noise Levels from FTA noise and vibration manual.
Construction noise is considered a short-term impact and it is considered exempt from the exterior noise
standard per City’s code 19.68.060(C)(2). Construction is anticipated to occur during the daytime hours
(7AM to 10PM on weekdays and 8AM to 10PM Saturday and Sunday) as defined in Section
17.24.040(C)(8) of the City’s Municipal Code. Construction noise will have a temporary or periodic
increase in the ambient noise level above the existing within the project vicinity. Furthermore, noise
reduction measures are provided to further reduce construction noise. The impact is considered to have
no impact however construction noise level projections are provided.
Typical operating cycles for these types of construction equipment may involve one or two minutes of
full power operation followed by three to four minutes at lower power settings. Noise levels will be
loudest during the grading phase. A likely worst-case construction noise scenario during grading assumes
the use of 2-earthmovers, 1-grader, 1-dozer, 1-excavators, and 1-backhoes operating at 293 feet from
the nearest sensitive receptor, located adjacent to the west property line. The distance to the nearest
sensitive receptor is taken from the center of the project site in order to average the work area where
the noise will be produced.
Assuming a usage factor of 40 percent for each piece of equipment, unmitigated noise levels at 293 feet
have the potential to reach 70 dBA Leq at the nearest sensitive receptors during grading. Noise levels for
the other construction phases would be lower, approximately 65 dBA. It shall be noted that the
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
26
construction activities will take place over the allowable hours (7AM to 10PM on weekdays and 8AM to
10PM Saturday and Sunday) and might have the potential to reach higher noise level at the property
lines. The louder level at property lines due to construction activities is to be exempt from the noise
ordinance limits per 19.68.060(C)(2) of the Municipal Code.
8.2 Construction Vibration
Construction activities can produce vibration that may be felt by adjacent land uses. The construction of
the proposed project would not require the use of equipment such as pile drivers, which are known to
generate substantial construction vibration levels. The primary vibration source during construction may
be from a bulldozer. A large bulldozer has a vibration impact of 0.089 inches per second peak particle
velocity (PPV) at 25 feet which is perceptible but below any risk to architectural damage.
The fundamental equation used to calculate vibration propagation through average soil conditions and
distance is as follows:
PPVequipment = PPVref (100/Drec)n
Where: PPVref = reference PPV at 100ft.
Drec = distance from equipment to receiver in ft.
n = 1.1 (the value related to the attenuation rate through ground)
The thresholds from the Caltrans Transportation and Construction Induced Vibration Guidance Manual
in Table 10 (below) provides general thresholds and guidelines as to the vibration damage potential from
vibratory impacts.
Table 10: Guideline Vibration Damage Potential Threshold Criteria
Structure and Condition
Maximum PPV (in/sec)
Transient Sources Continuous/Frequent
Intermittent Sources
Extremely fragile historic buildings, ruins, ancient monuments 0.12 0.08
Fragile buildings 0.2 0.1
Historic and some old buildings 0.5 0.25
Older residential structures 0.5 0.3
New residential structures 1.0 0.5
Modern industrial/commercial buildings 2.0 0.5
Source: Table 19, Transportation and Construction Vibration Guidance Manual, Caltrans, Sept. 2013.
Note: Transient sources create a single isolated vibration event, such as blasting or drop balls. Continuous/frequent intermittent sources include
impact pile drivers, pogo-stick compactors, crack-and-seat equipment, vibratory pile drivers, and vibratory compaction equipment.
Table 11 gives approximate vibration levels for particular construction activities. This data provides a
reasonable estimate for a wide range of soil conditions.
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
27
Table 11: Vibration Source Levels for Construction Equipment 1
Equipment
Peak Particle Velocity Approximate Vibration Level
(inches/second) at 25 feet LV (dVB) at 25 feet
Pile driver (impact) 1.518 (upper range) 112
0.644 (typical) 104
Pile driver (sonic) 0.734 upper range 105
0.170 typical 93
Clam shovel drop (slurry wall) 0.202 94
Hydromill 0.008 in soil 66
(slurry wall) 0.017 in rock 75
Vibratory Roller 0.21 94
Hoe Ram 0.089 87
Large bulldozer 0.089 87
Caisson drill 0.089 87
Loaded trucks 0.076 86
Jackhammer 0.035 79
Small bulldozer 0.003 58
1 Source: Transit Noise and Vibration Impact Assessment, Federal Transit Administration, September 2018.
Considering the adjacent residential to the west, at a distance of 293 feet from the project site’s center,
a large bulldozer would yield a worst-case 0.006 PPV (in/sec). Additionally, during grading along property
lines of the project site, and at 30 feet from the property line, the vibration level is about 0.073 in/sec
PPV. This vibration level may be perceptible for short periods of time but is below any threshold of
damage. The project will have no impact and no mitigation is required.
8.3 Construction Noise Reduction Policies
Construction operations must follow the City’s General Plan and the Noise Ordinance, which states that
construction, repair, or excavation work performed must occur within the permissible hours. To further
ensure that construction activities do not disrupt the adjacent land uses, the following policies shall be
taken and will be applied as conditions of approval:
1. Construction should occur during the permissible hours (7AM to 10PM on weekdays and 8AM to
10PM Saturday and Sunday) as defined in Section 17.24.040(C)(8) of the City’s Municipal Code.
2. During construction, the contractor shall ensure all construction equipment is equipped with
appropriate noise attenuating devices such as mufflers, silencers, and other original equipment
devices.
3. The contractor should locate equipment staging areas that will create the greatest distance
between construction-related noise/vibration sources and sensitive receptors nearest the
project site during all project construction.
4. Idling equipment should be turned off when not in use.
5. Equipment shall be maintained so that vehicles and their loads are secured from rattling and
banging.
Shinohara Industrial Center Project
Noise Impact Study
City of Chula Vista, CA References
28
9.0 References
State of California General Plan Guidelines: 1998. Governor’s Office of Planning and Research
City of Chula Vista: General Plan Environmental Element. Chapter 9.
City of Chula Vista: Municipal Code. Chapter 19.68 Performance Standards and Noise Control
Federal Highway Administration. Noise Barrier Design Handbook. June 2017.
Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual. September
2018.
Appendix A:
Photographs and Field Measurement Data
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Site Observations:
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Date:7/1/2021 to 7/2/2021
Field Tech/Engineer:Jason Schuyler
General Location:
Sound Meter:NTi XL2 SN:A2A-05967-E0 Site Topo:
Settings:A-weighted, slow, 1-min, 24-hour duration Ground Type:
Meteorological Con.:Temps in the hi 70's, minimal wind, west-southwest, 5mphs
Site ID:LT-1
24-Hour Continuous Noise Measurement Datasheet
1 - 9' from South limit property line
Clear sky, measurements were performed on the site and
measured the baseline noise conditions. Winds 3-5MPH, from S.W.
A police Helicopter flew overhead during ST1, the effect was
minimal.
Noise Source(s) w/ Distance:
Slopes hill
tall grasses & scrub brush
Figure 1: LT Monitoring Locations
Figure 2: LT-1 Photo
1
06232109_24Hr Field Sheet _1Hr_Awtg_LT1
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-1
Date Start Stop Leq Lmax Lmin L2 L8 L25 L50 L90
7/2/2021 12:00 AM 1:00 AM 64.6 76.9 61.4 72.0 66.2 63.5 63.0 62.3
7/2/2021 1:00 AM 2:00 AM 62.1 74.4 58.9 69.5 63.7 61.0 60.5 59.8
7/2/2021 2:00 AM 3:00 AM 60.9 73.2 57.7 68.3 62.5 59.8 59.3 58.6
7/2/2021 3:00 AM 4:00 AM 59.1 71.4 55.9 66.5 60.7 58.0 57.5 56.8
7/2/2021 4:00 AM 5:00 AM 60.1 72.4 56.9 67.5 61.7 59.0 58.5 57.8
7/2/2021 5:00 AM 6:00 AM 63.9 76.2 60.7 71.3 65.5 62.8 62.3 61.6
7/2/2021 6:00 AM 7:00 AM 70.3 82.6 67.1 77.7 71.9 69.2 68.7 68.0
7/2/2021 7:00 AM 8:00 AM 72.6 84.9 69.4 80.0 74.2 71.5 71.0 70.3
7/2/2021 8:00 AM 9:00 AM 70.7 83.0 67.5 78.1 72.3 69.6 69.1 68.4
7/2/2021 9:00 AM 10:00 AM 69.7 82.0 66.5 77.1 71.3 68.6 68.1 67.4
7/2/2021 10:00 AM 11:00 AM 69.6 81.9 66.4 77.0 71.2 68.5 68.0 67.3
7/2/2021 11:00 AM 12:00 PM 69.8 82.1 66.6 77.2 71.4 68.7 68.2 67.5
7/2/2021 12:00 PM 1:00 PM 69.9 82.2 66.7 77.3 71.5 68.8 68.3 67.6
7/2/2021 1:00 PM 2:00 PM 70.0 82.3 66.8 77.4 71.6 68.9 68.4 67.7
7/2/2021 2:00 PM 3:00 PM 70.3 82.6 67.1 77.7 71.9 69.2 68.7 68.0
7/2/2021 3:00 PM 4:00 PM 71.4 83.7 68.2 78.8 73.0 70.3 69.8 69.1
7/2/2021 4:00 PM 5:00 PM 73.0 85.3 69.8 80.4 74.6 71.9 71.4 70.7
7/2/2021 5:00 PM 6:00 PM 72.6 84.9 69.4 80.0 74.2 71.5 71.0 70.3
7/2/2021 6:00 PM 7:00 PM 70.9 83.2 67.7 78.3 72.5 69.8 69.3 68.6
7/2/2021 7:00 PM 8:00 PM 69.5 81.8 66.3 76.9 71.1 68.4 67.9 67.2
7/2/2021 8:00 PM 9:00 PM 68.4 80.7 65.2 75.8 70.0 67.3 66.8 66.1
7/2/2021 9:00 PM 10:00 PM 67.7 80.0 64.5 75.1 69.3 66.6 66.1 65.4
7/2/2021 10:00 PM 11:00 PM 66.7 79.0 63.5 74.1 68.3 65.6 65.1 64.4
7/2/2021 11:00 PM 12:00 AM 66.1 78.4 62.9 73.5 67.7 65.0 64.5 63.8
CNEL 73.3
24-Hour Noise Measurement Datasheet - Cont.
24-Hour Continuous Noise Measurement Datasheet - Cont.
06232109_24Hr Field Sheet _1Hr_Awtg_LT1
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-1
64.6
62.1 60.9 59.1 60.1
63.9
70.3
72.6 70.7 69.7 69.6 69.8 69.9 70.0 70.3 71.4 73.0 72.6 70.9 69.5 68.4 67.7 66.7 66.1
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
12:00 AM1:00 AM2:00 AM3:00 AM4:00 AM5:00 AM6:00 AM7:00 AM8:00 AM9:00 AM10:00 AM11:00 AM12:00 PM1:00 PM2:00 PM3:00 PM4:00 PM5:00 PM6:00 PM7:00 PM8:00 PM9:00 PM10:00 PM11:00 PMLeq(h), dBATime
24Hr -1Hr Leq & L90 Leq
L(90)
06232109_24Hr Field Sheet _1Hr_Awtg_LT1
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Site Observations:
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Date:7/1/2021 to 7/2/2021
Field Tech/Engineer:Jason Schuyler
General Location:
Sound Meter:NTi XL2 SN:A2A-05967-E0 Site Topo:
Settings:A-weighted, slow, 1-min, 24-hour duration Ground Type:
Meteorological Con.:Temps in the hi 70's, minimal wind, west-southwest, 5mphs
Site ID:LT-2
24-Hour Continuous Noise Measurement Datasheet
2 - 5' from Southwest limit property line
Clear sky, measurements were performed on the site and
measured the baseline noise conditions. Winds 3-5MPH, from S.W.
Noise Source(s) w/ Distance:
Slopes hill
tall grasses & scrub brush
Figure 1: LT Monitoring Locations
Figure 2: LT-2 Photo
2
06232109_24Hr Field Sheet _1Hr_Awtg_LT2
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-2
Date Start Stop Leq Lmax Lmin L2 L8 L25 L50 L90
7/2/2021 12:00 AM 1:00 AM 49.7 66.8 43.6 57.4 49.1 47.5 46.7 45.4
7/2/2021 1:00 AM 2:00 AM 47.3 64.4 41.2 55.0 46.7 45.1 44.3 43.0
7/2/2021 2:00 AM 3:00 AM 46.0 63.1 39.9 53.7 45.4 43.8 43.0 41.7
7/2/2021 3:00 AM 4:00 AM 44.3 61.4 38.2 52.0 43.7 42.1 41.3 40.0
7/2/2021 4:00 AM 5:00 AM 45.2 62.3 39.1 52.9 44.6 43.0 42.2 40.9
7/2/2021 5:00 AM 6:00 AM 49.0 66.1 42.9 56.7 48.4 46.8 46.0 44.7
7/2/2021 6:00 AM 7:00 AM 55.5 72.6 49.4 63.2 54.9 53.3 52.5 51.2
7/2/2021 7:00 AM 8:00 AM 57.7 74.8 51.6 65.4 57.1 55.5 54.7 53.4
7/2/2021 8:00 AM 9:00 AM 55.9 73.0 49.8 63.6 55.3 53.7 52.9 51.6
7/2/2021 9:00 AM 10:00 AM 54.9 72.0 48.8 62.6 54.3 52.7 51.9 50.6
7/2/2021 10:00 AM 11:00 AM 54.8 71.9 48.7 62.5 54.2 52.6 51.8 50.5
7/2/2021 11:00 AM 12:00 PM 55.0 72.1 48.9 62.7 54.4 52.8 52.0 50.7
7/2/2021 12:00 PM 1:00 PM 55.1 72.2 49.0 62.8 54.5 52.9 52.1 50.8
7/2/2021 1:00 PM 2:00 PM 55.1 72.2 49.0 62.8 54.5 52.9 52.1 50.8
7/2/2021 2:00 PM 3:00 PM 55.4 72.5 49.3 63.1 54.8 53.2 52.4 51.1
7/2/2021 3:00 PM 4:00 PM 56.6 73.7 50.5 64.3 56.0 54.4 53.6 52.3
7/2/2021 4:00 PM 5:00 PM 58.1 75.2 52.0 65.8 57.5 55.9 55.1 53.8
7/2/2021 5:00 PM 6:00 PM 57.7 74.8 51.6 65.4 57.1 55.5 54.7 53.4
7/2/2021 6:00 PM 7:00 PM 56.0 73.1 49.9 63.7 55.4 53.8 53.0 51.7
7/2/2021 7:00 PM 8:00 PM 54.7 71.8 48.6 62.4 54.1 52.5 51.7 50.4
7/2/2021 8:00 PM 9:00 PM 53.6 70.7 47.5 61.3 53.0 51.4 50.6 49.3
7/2/2021 9:00 PM 10:00 PM 52.9 70.0 46.8 60.6 52.3 50.7 49.9 48.6
7/2/2021 10:00 PM 11:00 PM 51.9 69.0 45.8 59.6 51.3 49.7 48.9 47.6
7/2/2021 11:00 PM 12:00 AM 51.3 68.4 45.2 59.0 50.7 49.1 48.3 47.0
CNEL 58.5
24-Hour Noise Measurement Datasheet - Cont.
24-Hour Continuous Noise Measurement Datasheet - Cont.
06232109_24Hr Field Sheet _1Hr_Awtg_LT2
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-2
49.7
47.3 46.0
44.3 45.2
49.0
55.5
57.7
55.9 54.9 54.8 55.0 55.1 55.1 55.4 56.6 58.1 57.7 56.0 54.7 53.6 52.9 51.9 51.3
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
12:00 AM1:00 AM2:00 AM3:00 AM4:00 AM5:00 AM6:00 AM7:00 AM8:00 AM9:00 AM10:00 AM11:00 AM12:00 PM1:00 PM2:00 PM3:00 PM4:00 PM5:00 PM6:00 PM7:00 PM8:00 PM9:00 PM10:00 PM11:00 PMLeq(h), dBATime
24Hr -1Hr Leq & L90 Leq
L(90)
06232109_24Hr Field Sheet _1Hr_Awtg_LT2
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Site Observations:
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Date:7/1/2021 to 7/2/2021
Field Tech/Engineer:Jason Schuyler
General Location:
Sound Meter:NTi XL2 SN:A2A-05967-E0 Site Topo:
Settings:A-weighted, slow, 1-min, 24-hour duration Ground Type:
Meteorological Con.:Temps in the hi 70's, minimal wind, west-southwest, 5mphs
Site ID:LT-3
24-Hour Continuous Noise Measurement Datasheet
3- 3' from North limit property line
Clear sky, measurements were performed on the site and
measured the baseline noise conditions. Winds 3-5MPH, from S.W.
Noise Source(s) w/ Distance:
Slopes hill
tall grasses & scrub brush
Figure 1: LT Monitoring Locations
Figure 2: LT-3 Photo
3
06232109_24Hr Field Sheet _1Hr_Awtg_LT3
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-3
Date Start Stop Leq Lmax Lmin L2 L8 L25 L50 L90
7/2/2021 12:00 AM 1:00 AM 48.4 63.7 44.3 53.9 49.7 48.2 47.3 45.7
7/2/2021 1:00 AM 2:00 AM 46.0 61.3 41.9 51.5 47.3 45.8 44.9 43.3
7/2/2021 2:00 AM 3:00 AM 44.8 60.1 40.7 50.3 46.1 44.6 43.7 42.1
7/2/2021 3:00 AM 4:00 AM 43.0 58.3 38.9 48.5 44.3 42.8 41.9 40.3
7/2/2021 4:00 AM 5:00 AM 44.0 59.3 39.9 49.5 45.3 43.8 42.9 41.3
7/2/2021 5:00 AM 6:00 AM 47.8 63.1 43.7 53.3 49.1 47.6 46.7 45.1
7/2/2021 6:00 AM 7:00 AM 54.2 69.5 50.1 59.7 55.5 54.0 53.1 51.5
7/2/2021 7:00 AM 8:00 AM 56.5 71.8 52.4 62.0 57.8 56.3 55.4 53.8
7/2/2021 8:00 AM 9:00 AM 54.6 69.9 50.5 60.1 55.9 54.4 53.5 51.9
7/2/2021 9:00 AM 10:00 AM 53.6 68.9 49.5 59.1 54.9 53.4 52.5 50.9
7/2/2021 10:00 AM 11:00 AM 53.5 68.8 49.4 59.0 54.8 53.3 52.4 50.8
7/2/2021 11:00 AM 12:00 PM 53.7 69.0 49.6 59.2 55.0 53.5 52.6 51.0
7/2/2021 12:00 PM 1:00 PM 53.8 69.1 49.7 59.3 55.1 53.6 52.7 51.1
7/2/2021 1:00 PM 2:00 PM 53.9 69.2 49.8 59.4 55.2 53.7 52.8 51.2
7/2/2021 2:00 PM 3:00 PM 54.1 69.4 50.0 59.6 55.4 53.9 53.0 51.4
7/2/2021 3:00 PM 4:00 PM 55.3 70.6 51.2 60.8 56.6 55.1 54.2 52.6
7/2/2021 4:00 PM 5:00 PM 56.8 72.1 52.7 62.3 58.1 56.6 55.7 54.1
7/2/2021 5:00 PM 6:00 PM 56.5 71.8 52.4 62.0 57.8 56.3 55.4 53.8
7/2/2021 6:00 PM 7:00 PM 54.8 70.1 50.7 60.3 56.1 54.6 53.7 52.1
7/2/2021 7:00 PM 8:00 PM 53.4 68.7 49.3 58.9 54.7 53.2 52.3 50.7
7/2/2021 8:00 PM 9:00 PM 52.3 67.6 48.2 57.8 53.6 52.1 51.2 49.6
7/2/2021 9:00 PM 10:00 PM 51.6 66.9 47.5 57.1 52.9 51.4 50.5 48.9
7/2/2021 10:00 PM 11:00 PM 50.6 65.9 46.5 56.1 51.9 50.4 49.5 47.9
7/2/2021 11:00 PM 12:00 AM 50.0 65.3 45.9 55.5 51.3 49.8 48.9 47.3
CNEL:57.2
24-Hour Noise Measurement Datasheet - Cont.
24-Hour Continuous Noise Measurement Datasheet - Cont.
06232109_24Hr Field Sheet _1Hr_Awtg_LT3
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
CA Office
1197 E Los Angeles Ave, C-256
Simi Valley, CA 93065
Project:Shinohara Industrial Project Day:1 of 1
Site Address/Location:517 Shinohara Lane, Chula Vista, CA 91911
Site ID:LT-3
48.4
46.0 44.8
43.0 44.0
47.8
54.2
56.5
54.6 53.6 53.5 53.7 53.8 53.9 54.1 55.3
56.8 56.5
54.8 53.4 52.3 51.6 50.6 50.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
12:00 AM1:00 AM2:00 AM3:00 AM4:00 AM5:00 AM6:00 AM7:00 AM8:00 AM9:00 AM10:00 AM11:00 AM12:00 PM1:00 PM2:00 PM3:00 PM4:00 PM5:00 PM6:00 PM7:00 PM8:00 PM9:00 PM10:00 PM11:00 PMLeq(h), dBATime
24Hr -1Hr Leq & L90 Leq
L(90)
06232109_24Hr Field Sheet _1Hr_Awtg_LT3
Appendix B:
Reference Sound Level
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
p. (602) 774-1950
CA Office
1197 Los Angeles Ave, Ste C-256
Simi Valley, CA 93065
p. (805) 426-4477
Project:N/A Site Observations:
Site Location:MD Acoustics and Labs 170 S. William Dillard Dr. Suite 103
Date:8/11/2020
Field Tech/Engineer:Shon Baldwin
Source/System:Semi Truck
Location:Loading dock
Sound Meter:NTi XL2 SN:A2A-05967-E0
Settings:A-weighted, fast, 1-sec, 30-sec duration
Meteorological Cond.:N/A
20 25 32 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K3.15K 4K 5K 6.3K 8K 10K 12.5K 16K 20K
Semi-Truck Idle Semi-Truck 73.8 16 21 25 30 32 36 41 46 61 50 53 54 57 60 61 62 63 68 63.1 63 63 61 58 57 55 52 48 44 41 36 32
Clear sky, 95 degrees, F
Table 1: Summary Measurement Data
Figure 1: Semi Truck
3rd Octave Band Data (dBA)Overall
dB(A)SystemSource
0
10
20
30
40
50
60
70
80
dBAFreq (Hz)
Idling Semi-Truck @ 10ft
SemiTruck_3rdOct_Template_Awtg
www.mdacoustics.com
AZ Office
4960 S. Gilbert Rd, Ste 1-461
Chandler, AZ 85249
p. (602) 774-1950
CA Office
1197 Los Angeles Ave, Ste C-256
Simi Valley, CA 93065
p. (805) 426-4477
20 25 32 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K3.15K 4K 5K 6.3K 8K 10K 12.5K 16K 20K
1 73.8 16 21 25 30 32 36 41 46 61 50 53 54 57 60 61 62 63 68 63.1 63 63 61 58 57 55 52 48 44 41 36 32
3rd Octave Band Data (dBA)
Table 2: SPL Measurements
Location Overall
dB(A)Position
SemiTruck_3rdOct_Template_Awtg
Appendix C:
SoundPlan Input/Output
Shinohara Chula Vista Noise
Octave spectra of the sources in dB(A) - 002 - Outdoor SP
3
Name Source type l or A
m,m²
Li
dB(A)
R'w
dB
L'w
dB(A)
Lw
dB(A)
KI
dB
KT
dB
LwMax
dB(A)
DO-Wall
dB
Time histogram Emission spectrum 63Hz
dB(A)
125Hz
dB(A)
250Hz
dB(A)
500Hz
dB(A)
1kHz
dB(A)
2kHz
dB(A)
4kHz
dB(A)
8kHz
dB(A)
16kHz
dB(A)
Line 83.05 40.3 59.5 0.0 0.0 0 20 events per hr Idiling Semi-Truck 2 12.6 24.0 47.0 43.2 50.2 55.8 53.6 49.6 42.6
Line 67.36 40.3 58.6 0.0 0.0 0 20 events per hr Idiling Semi-Truck 2 11.7 23.0 46.1 42.3 49.3 54.9 52.7 48.7 41.7
Line 68.17 40.3 58.7 0.0 0.0 0 20 events per hr Idiling Semi-Truck 2 11.8 23.1 46.2 42.4 49.4 54.9 52.7 48.7 41.7
Line 276.95 40.3 64.7 0.0 0.0 0 20 events per hr Idiling Semi-Truck 2 17.9 29.2 52.3 48.5 55.5 61.0 58.8 54.8 47.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
Back Up Alarm Point 83.4 83.4 0.0 0.0 0 Back up Alarm Back up Beeper 68.6 63.0 65.0 72.1 70.8 82.4 66.4 59.1 45.8
HVAC North Point 80.0 80.0 0.0 0.0 0 100%/24h Carrier 50TFQ0006 - 5 Ton 56.3 62.9 67.9 72.7 74.4 74.2 71.2 66.9 55.1
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 1
Shinohara Chula Vista Noise
Octave spectra of the sources in dB(A) - 002 - Outdoor SP
3
Name Source type l or A
m,m²
Li
dB(A)
R'w
dB
L'w
dB(A)
Lw
dB(A)
KI
dB
KT
dB
LwMax
dB(A)
DO-Wall
dB
Time histogram Emission spectrum 63Hz
dB(A)
125Hz
dB(A)
250Hz
dB(A)
500Hz
dB(A)
1kHz
dB(A)
2kHz
dB(A)
4kHz
dB(A)
8kHz
dB(A)
16kHz
dB(A)
HVAC South Point 80.0 80.0 0.0 0.0 0 100%/24h Carrier 50TFQ0006 - 5 Ton 56.3 62.9 67.9 72.7 74.4 74.2 71.2 66.9 55.1
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 1 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 5 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 5 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 15 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 16 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 19 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Loading Dock 20 Point 91.4 91.4 0.0 0.0 0 Back up Alarm Idiling Heavy Diesel Truck 60.6 78.3 77.1 83.5 88.1 84.8 79.8 71.8 59.6
Parking 1 PLot 113.77 55.5 76.0 0.0 0.0 0 1 event per hr Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 2 PLot 160.77 54.9 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 3 PLot 158.63 55.0 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 2
Shinohara Chula Vista Noise
Octave spectra of the sources in dB(A) - 002 - Outdoor SP
3
Name Source type l or A
m,m²
Li
dB(A)
R'w
dB
L'w
dB(A)
Lw
dB(A)
KI
dB
KT
dB
LwMax
dB(A)
DO-Wall
dB
Time histogram Emission spectrum 63Hz
dB(A)
125Hz
dB(A)
250Hz
dB(A)
500Hz
dB(A)
1kHz
dB(A)
2kHz
dB(A)
4kHz
dB(A)
8kHz
dB(A)
16kHz
dB(A)
Parking 4 PLot 152.52 55.2 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 5 PLot 147.32 55.3 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 5 PLot 91.07 53.4 73.0 0.0 0.0 0 1 event per hr Typical spectrum 56.4 68.0 60.5 65.0 65.1 65.5 62.8 56.6 43.8
Parking 6 PLot 179.11 54.5 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 7 PLot 176.10 54.5 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 8 PLot 114.41 55.4 76.0 0.0 0.0 0 1 event per hr Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 9 PLot 165.93 54.8 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 10 PLot 165.29 54.8 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 11 PLot 161.72 54.9 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 12 PLot 156.60 55.1 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 13 PLot 167.14 54.8 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 14 PLot 163.99 54.9 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 15 PLot 168.77 54.3 76.5 0.0 0.0 0 1 event per hr Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
Parking 15 PLot 59.12 55.3 73.0 0.0 0.0 0 1 event per hr Typical spectrum 56.4 68.0 60.5 65.0 65.1 65.5 62.8 56.6 43.8
Parking 19 PLot 107.99 55.1 75.5 0.0 0.0 0 1 event per hr Typical spectrum 58.8 70.4 62.9 67.4 67.5 67.9 65.2 59.0 46.2
Parking 20 PLot 154.65 55.1 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 21 PLot 154.59 55.1 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 22 PLot 151.56 55.2 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 23 PLot 146.58 55.3 77.0 0.0 0.0 0 1 event per hr Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 3
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Receiver Receiver 1 Fl G dB(A) Leq,d 30.4 dB(A)
Parking 3 Default parking lot noise PLot 25.2 0.0
Parking 2 Default parking lot noise PLot 24.8 0.0
Parking 7 Default parking lot noise PLot 19.9 0.0
Parking 1 Default parking lot noise PLot 19.2 0.0
Parking 4 Default parking lot noise PLot 18.8 0.0
Parking 6 Default parking lot noise PLot 17.7 0.0
Parking 8 Default parking lot noise PLot 16.4 0.0
Parking 5 Default parking lot noise PLot 10.2 0.0
Parking 9 Default parking lot noise PLot 9.3 0.0
HVAC South Default industrial noise Point 8.1 0.0
Parking 5 Default parking lot noise PLot 7.5 0.0
Loading Dock 5 Default industrial noise Point 5.7 0.0
Loading Dock 5 Default industrial noise Point 5.7 0.0
Loading Dock Default industrial noise Point 5.4 0.0
Loading Dock Default industrial noise Point 5.0 0.0
Loading Dock Default industrial noise Point 4.7 0.0
Loading Dock 20 Default industrial noise Point 4.2 0.0
Parking 10 Default parking lot noise PLot 4.2 0.0
Loading Dock Default industrial noise Point 3.9 0.0
Loading Dock Default industrial noise Point 3.7 0.0
Loading Dock Default industrial noise Point 3.4 0.0
Loading Dock Default industrial noise Point 3.1 0.0
Loading Dock Default industrial noise Point 2.8 0.0
Loading Dock 16 Default industrial noise Point 2.7 0.0
Loading Dock Default industrial noise Point 2.3 0.0
Loading Dock Default industrial noise Point 1.8 0.0
Loading Dock 19 Default industrial noise Point 1.6 0.0
Loading Dock Default industrial noise Point 1.3 0.0
Loading Dock Default industrial noise Point 1.1 0.0
Parking 11 Default parking lot noise PLot 1.0 0.0
Loading Dock Default industrial noise Point 0.9 0.0
Loading Dock Default industrial noise Point 0.7 0.0
Loading Dock Default industrial noise Point 0.4 0.0
Loading Dock 15 Default industrial noise Point 0.2 0.0
Parking 12 Default parking lot noise PLot -0.4 0.0
Loading Dock Default industrial noise Point -0.4 0.0
Loading Dock Default industrial noise Point -0.6 0.0
Loading Dock Default industrial noise Point -0.8 0.0
Loading Dock Default industrial noise Point -1.0 0.0
Loading Dock 1 Default industrial noise Point -1.2 0.0
Back Up Alarm Default industrial noise Point -1.7 0.0
Parking 13 Default parking lot noise PLot -2.0 0.0
Back Up Alarm Default industrial noise Point -2.0 0.0
25 Default industrial noise Line -2.3 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 1
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Back Up Alarm Default industrial noise Point -2.3 0.0
Back Up Alarm Default industrial noise Point -2.6 0.0
Back Up Alarm Default industrial noise Point -3.0 0.0
Parking 14 Default parking lot noise PLot -3.0 0.0
Back Up Alarm Default industrial noise Point -3.3 0.0
Back Up Alarm Default industrial noise Point -3.5 0.0
HVAC North Default industrial noise Point -3.6 0.0
Back Up Alarm Default industrial noise Point -3.7 0.0
Back Up Alarm Default industrial noise Point -4.1 0.0
Back Up Alarm Default industrial noise Point -4.3 0.0
Back Up Alarm Default industrial noise Point -4.5 0.0
Back Up Alarm Default industrial noise Point -4.8 0.0
Parking 15 Default parking lot noise PLot -5.2 0.0
Back Up Alarm Default industrial noise Point -5.3 0.0
Back Up Alarm Default industrial noise Point -5.5 0.0
Parking 22 Default parking lot noise PLot -5.7 0.0
Parking 23 Default parking lot noise PLot -5.8 0.0
Back Up Alarm Default industrial noise Point -5.8 0.0
Parking 20 Default parking lot noise PLot -5.9 0.0
Parking 21 Default parking lot noise PLot -6.0 0.0
Back Up Alarm Default industrial noise Point -6.0 0.0
Back Up Alarm Default industrial noise Point -6.2 0.0
Back Up Alarm Default industrial noise Point -6.4 0.0
Back Up Alarm Default industrial noise Point -6.7 0.0
Back Up Alarm Default industrial noise Point -6.9 0.0
28 Default industrial noise Line -7.3 0.0
Parking 19 Default parking lot noise PLot -7.5 0.0
Back Up Alarm Default industrial noise Point -7.5 0.0
Back Up Alarm Default industrial noise Point -7.7 0.0
Back Up Alarm Default industrial noise Point -7.9 0.0
Back Up Alarm Default industrial noise Point -8.1 0.0
Back Up Alarm Default industrial noise Point -8.3 0.0
Parking 15 Default parking lot noise PLot -9.0 0.0
27 Default industrial noise Line -9.4 0.0
26 Default industrial noise Line -10.7 0.0
Receiver Receiver 2 Fl G dB(A) Leq,d 33.0 dB(A)
Parking 9 Default parking lot noise PLot 28.0 0.0
Parking 10 Default parking lot noise PLot 27.8 0.0
Parking 11 Default parking lot noise PLot 23.6 0.0
Parking 1 Default parking lot noise PLot 20.3 0.0
Parking 12 Default parking lot noise PLot 19.2 0.0
Parking 6 Default parking lot noise PLot 18.9 0.0
Parking 2 Default parking lot noise PLot 16.6 0.0
Parking 13 Default parking lot noise PLot 15.0 0.0
Parking 14 Default parking lot noise PLot 11.5 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 2
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Parking 7 Default parking lot noise PLot 10.8 0.0
Parking 3 Default parking lot noise PLot 10.1 0.0
Parking 4 Default parking lot noise PLot 7.6 0.0
Parking 8 Default parking lot noise PLot 7.3 0.0
Parking 19 Default parking lot noise PLot 6.4 0.0
HVAC South Default industrial noise Point 6.3 0.0
Parking 15 Default parking lot noise PLot 6.0 0.0
Loading Dock 5 Default industrial noise Point 5.6 0.0
Loading Dock 5 Default industrial noise Point 5.6 0.0
Loading Dock Default industrial noise Point 5.6 0.0
Loading Dock Default industrial noise Point 5.5 0.0
Loading Dock Default industrial noise Point 5.5 0.0
Loading Dock 20 Default industrial noise Point 5.5 0.0
Loading Dock Default industrial noise Point 5.4 0.0
Loading Dock Default industrial noise Point 5.4 0.0
Loading Dock Default industrial noise Point 5.3 0.0
Loading Dock Default industrial noise Point 5.1 0.0
Loading Dock Default industrial noise Point 5.0 0.0
Loading Dock 16 Default industrial noise Point 4.9 0.0
Loading Dock Default industrial noise Point 4.8 0.0
Loading Dock Default industrial noise Point 4.7 0.0
Loading Dock 19 Default industrial noise Point 4.6 0.0
Parking 5 Default parking lot noise PLot 4.5 0.0
Loading Dock Default industrial noise Point 4.5 0.0
Loading Dock Default industrial noise Point 4.4 0.0
HVAC North Default industrial noise Point 4.3 0.0
Loading Dock Default industrial noise Point 4.3 0.0
Loading Dock 15 Default industrial noise Point 4.2 0.0
Loading Dock Default industrial noise Point 4.2 0.0
Loading Dock Default industrial noise Point 4.1 0.0
Loading Dock Default industrial noise Point 4.0 0.0
Loading Dock Default industrial noise Point 3.9 0.0
Loading Dock Default industrial noise Point 3.8 0.0
Loading Dock 1 Default industrial noise Point 3.7 0.0
Loading Dock Default industrial noise Point 3.4 0.0
Parking 20 Default parking lot noise PLot 3.3 0.0
Parking 5 Default parking lot noise PLot 2.7 0.0
Parking 23 Default parking lot noise PLot 2.4 0.0
Parking 15 Default parking lot noise PLot 2.1 0.0
Parking 21 Default parking lot noise PLot 2.0 0.0
Parking 22 Default parking lot noise PLot 1.3 0.0
Back Up Alarm Default industrial noise Point -0.8 0.0
Back Up Alarm Default industrial noise Point -0.9 0.0
Back Up Alarm Default industrial noise Point -0.9 0.0
Back Up Alarm Default industrial noise Point -0.9 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 3
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Back Up Alarm Default industrial noise Point -0.9 0.0
Back Up Alarm Default industrial noise Point -1.0 0.0
Back Up Alarm Default industrial noise Point -1.0 0.0
Back Up Alarm Default industrial noise Point -1.2 0.0
Back Up Alarm Default industrial noise Point -1.3 0.0
Back Up Alarm Default industrial noise Point -1.4 0.0
Back Up Alarm Default industrial noise Point -1.5 0.0
Back Up Alarm Default industrial noise Point -1.6 0.0
Back Up Alarm Default industrial noise Point -1.7 0.0
Back Up Alarm Default industrial noise Point -1.8 0.0
Back Up Alarm Default industrial noise Point -1.9 0.0
Back Up Alarm Default industrial noise Point -1.9 0.0
25 Default industrial noise Line -1.9 0.0
Back Up Alarm Default industrial noise Point -2.0 0.0
Back Up Alarm Default industrial noise Point -2.6 0.0
Back Up Alarm Default industrial noise Point -2.7 0.0
Back Up Alarm Default industrial noise Point -2.7 0.0
Back Up Alarm Default industrial noise Point -2.7 0.0
Back Up Alarm Default industrial noise Point -2.8 0.0
Back Up Alarm Default industrial noise Point -2.8 0.0
Back Up Alarm Default industrial noise Point -2.9 0.0
Back Up Alarm Default industrial noise Point -3.4 0.0
28 Default industrial noise Line -6.9 0.0
26 Default industrial noise Line -7.5 0.0
27 Default industrial noise Line -7.7 0.0
Receiver Receiver 3 Fl G dB(A) Leq,d 40.8 dB(A)
Loading Dock 1 Default industrial noise Point 26.9 0.0
Loading Dock Default industrial noise Point 26.8 0.0
Loading Dock Default industrial noise Point 26.8 0.0
Loading Dock Default industrial noise Point 26.5 0.0
HVAC North Default industrial noise Point 26.4 0.0
Loading Dock Default industrial noise Point 26.2 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock 20 Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock 5 Default industrial noise Point 25.5 0.0
Loading Dock 5 Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock Default industrial noise Point 25.5 0.0
Loading Dock 15 Default industrial noise Point 25.4 0.0
Loading Dock Default industrial noise Point 25.2 0.0
Loading Dock Default industrial noise Point 25.0 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 4
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Loading Dock Default industrial noise Point 24.8 0.0
Loading Dock Default industrial noise Point 24.7 0.0
Loading Dock Default industrial noise Point 24.6 0.0
Loading Dock 19 Default industrial noise Point 24.5 0.0
Loading Dock Default industrial noise Point 24.4 0.0
Loading Dock Default industrial noise Point 24.3 0.0
Loading Dock 16 Default industrial noise Point 24.2 0.0
Loading Dock Default industrial noise Point 24.2 0.0
HVAC South Default industrial noise Point 21.9 0.0
Parking 15 Default parking lot noise PLot 21.7 0.0
Back Up Alarm Default industrial noise Point 19.6 0.0
Back Up Alarm Default industrial noise Point 19.3 0.0
Back Up Alarm Default industrial noise Point 19.1 0.0
Back Up Alarm Default industrial noise Point 19.1 0.0
Back Up Alarm Default industrial noise Point 18.8 0.0
Parking 5 Default parking lot noise PLot 18.2 0.0
Back Up Alarm Default industrial noise Point 18.2 0.0
Back Up Alarm Default industrial noise Point 18.1 0.0
Back Up Alarm Default industrial noise Point 18.0 0.0
Back Up Alarm Default industrial noise Point 18.0 0.0
Back Up Alarm Default industrial noise Point 17.9 0.0
Back Up Alarm Default industrial noise Point 17.9 0.0
Parking 22 Default parking lot noise PLot 17.9 0.0
Back Up Alarm Default industrial noise Point 17.8 0.0
Back Up Alarm Default industrial noise Point 17.8 0.0
Back Up Alarm Default industrial noise Point 17.8 0.0
Back Up Alarm Default industrial noise Point 17.7 0.0
Back Up Alarm Default industrial noise Point 17.7 0.0
Back Up Alarm Default industrial noise Point 17.7 0.0
Back Up Alarm Default industrial noise Point 17.5 0.0
Parking 21 Default parking lot noise PLot 17.5 0.0
Back Up Alarm Default industrial noise Point 17.4 0.0
Back Up Alarm Default industrial noise Point 17.3 0.0
Back Up Alarm Default industrial noise Point 17.1 0.0
Back Up Alarm Default industrial noise Point 17.0 0.0
Back Up Alarm Default industrial noise Point 16.9 0.0
Back Up Alarm Default industrial noise Point 16.8 0.0
Back Up Alarm Default industrial noise Point 16.6 0.0
Parking 20 Default parking lot noise PLot 15.5 0.0
26 Default industrial noise Line 15.5 0.0
Parking 13 Default parking lot noise PLot 15.4 0.0
Parking 14 Default parking lot noise PLot 15.3 0.0
25 Default industrial noise Line 14.9 0.0
27 Default industrial noise Line 14.9 0.0
28 Default industrial noise Line 14.7 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 5
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Parking 12 Default parking lot noise PLot 14.5 0.0
Parking 23 Default parking lot noise PLot 14.4 0.0
Parking 11 Default parking lot noise PLot 13.8 0.0
Parking 10 Default parking lot noise PLot 13.3 0.0
Parking 9 Default parking lot noise PLot 12.5 0.0
Parking 4 Default parking lot noise PLot 12.0 0.0
Parking 19 Default parking lot noise PLot 11.7 0.0
Parking 3 Default parking lot noise PLot 11.7 0.0
Parking 2 Default parking lot noise PLot 11.6 0.0
Parking 1 Default parking lot noise PLot 11.0 0.0
Parking 15 Default parking lot noise PLot 9.6 0.0
Parking 7 Default parking lot noise PLot 7.7 0.0
Parking 6 Default parking lot noise PLot 7.6 0.0
Parking 8 Default parking lot noise PLot 6.8 0.0
Parking 5 Default parking lot noise PLot 4.6 0.0
Receiver Receiver 4 Fl G dB(A) Leq,d 37.7 dB(A)
Loading Dock Default industrial noise Point 24.4 0.0
Loading Dock 15 Default industrial noise Point 24.1 0.0
Loading Dock Default industrial noise Point 24.0 0.0
Loading Dock Default industrial noise Point 23.8 0.0
Loading Dock Default industrial noise Point 23.6 0.0
Loading Dock Default industrial noise Point 23.4 0.0
Loading Dock Default industrial noise Point 23.3 0.0
Loading Dock Default industrial noise Point 23.2 0.0
Loading Dock Default industrial noise Point 23.2 0.0
Loading Dock Default industrial noise Point 23.1 0.0
Loading Dock 19 Default industrial noise Point 23.0 0.0
Loading Dock Default industrial noise Point 22.8 0.0
Loading Dock Default industrial noise Point 22.3 0.0
Loading Dock 16 Default industrial noise Point 22.0 0.0
Loading Dock 1 Default industrial noise Point 22.0 0.0
Loading Dock Default industrial noise Point 21.9 0.0
Loading Dock Default industrial noise Point 21.6 0.0
HVAC North Default industrial noise Point 21.4 0.0
Loading Dock Default industrial noise Point 21.3 0.0
Loading Dock Default industrial noise Point 21.2 0.0
Loading Dock Default industrial noise Point 21.0 0.0
Loading Dock 20 Default industrial noise Point 20.8 0.0
HVAC South Default industrial noise Point 20.7 0.0
Loading Dock Default industrial noise Point 20.5 0.0
Loading Dock Default industrial noise Point 20.3 0.0
Loading Dock Default industrial noise Point 20.1 0.0
Loading Dock 5 Default industrial noise Point 20.0 0.0
Loading Dock 5 Default industrial noise Point 20.0 0.0
Parking 15 Default parking lot noise PLot 18.9 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 6
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Back Up Alarm Default industrial noise Point 16.5 0.0
Back Up Alarm Default industrial noise Point 16.5 0.0
Back Up Alarm Default industrial noise Point 16.4 0.0
Back Up Alarm Default industrial noise Point 16.3 0.0
Parking 5 Default parking lot noise PLot 16.2 0.0
Back Up Alarm Default industrial noise Point 16.2 0.0
Back Up Alarm Default industrial noise Point 16.0 0.0
Back Up Alarm Default industrial noise Point 15.8 0.0
Back Up Alarm Default industrial noise Point 15.6 0.0
Back Up Alarm Default industrial noise Point 15.4 0.0
Back Up Alarm Default industrial noise Point 14.9 0.0
Back Up Alarm Default industrial noise Point 14.6 0.0
Back Up Alarm Default industrial noise Point 14.5 0.0
Back Up Alarm Default industrial noise Point 14.4 0.0
Back Up Alarm Default industrial noise Point 14.4 0.0
Parking 23 Default parking lot noise PLot 14.3 0.0
Back Up Alarm Default industrial noise Point 14.2 0.0
Back Up Alarm Default industrial noise Point 14.1 0.0
Back Up Alarm Default industrial noise Point 13.9 0.0
Back Up Alarm Default industrial noise Point 13.7 0.0
Parking 22 Default parking lot noise PLot 13.6 0.0
Back Up Alarm Default industrial noise Point 13.6 0.0
Back Up Alarm Default industrial noise Point 13.4 0.0
Back Up Alarm Default industrial noise Point 13.3 0.0
Back Up Alarm Default industrial noise Point 13.1 0.0
Back Up Alarm Default industrial noise Point 12.9 0.0
25 Default industrial noise Line 12.9 0.0
Parking 21 Default parking lot noise PLot 12.8 0.0
Back Up Alarm Default industrial noise Point 12.7 0.0
Back Up Alarm Default industrial noise Point 12.6 0.0
26 Default industrial noise Line 12.5 0.0
Parking 4 Default parking lot noise PLot 12.4 0.0
27 Default industrial noise Line 12.4 0.0
Parking 11 Default parking lot noise PLot 11.8 0.0
Parking 12 Default parking lot noise PLot 11.7 0.0
Parking 3 Default parking lot noise PLot 11.3 0.0
Parking 14 Default parking lot noise PLot 11.3 0.0
Parking 10 Default parking lot noise PLot 11.2 0.0
Parking 2 Default parking lot noise PLot 11.1 0.0
28 Default industrial noise Line 11.1 0.0
Parking 20 Default parking lot noise PLot 11.0 0.0
Parking 9 Default parking lot noise PLot 10.7 0.0
Parking 1 Default parking lot noise PLot 10.2 0.0
Parking 13 Default parking lot noise PLot 9.4 0.0
Parking 7 Default parking lot noise PLot 7.2 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 7
Shinohara Chula Vista Noise
Contribution level - 002 - Outdoor SP
9
Source Source group Source typeTr. lane Leq,d
dB(A)
A
dB
Parking 6 Default parking lot noise PLot 7.1 0.0
Parking 8 Default parking lot noise PLot 6.4 0.0
Parking 15 Default parking lot noise PLot 6.1 0.0
Parking 5 Default parking lot noise PLot 5.4 0.0
Parking 19 Default parking lot noise PLot 4.9 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 8
Appendix D:
Traffic Noise Modeling Output
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Shinohara Industrial Project, Warehousing Model JOB #:0623-2021-09
ROADWAY:Shinohara to Main DATE:3-Nov-22
LOCATION:FACADE ENGINEER:F. Irarrazabal
ADT =15,200 RECEIVER DISTANCE = 50
SPEED =35 DIST C/L TO WALL =40
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =10
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,520 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 10 HTH WALL=0.0
MEDIUM TRUCKS =10 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =10 BARRIER =0 (0 = WALL, 1 = BERM)
VEHICLE TYPE EVENING NIGHT DAILY VEHICLE TYPE HEIGHT SLE DISTANCE
AUTOMOBILES 0.129 0.096 0.9742 AUTOMOBILES 2.0 50.12
MEDIUM TRUCKS 0.049 0.103 0.0184 MEDIUM TRUCKS 4.0 50.02
HEAVY TRUCKS 0.027 0.108 0.0074 HEAVY TRUCKS 8.0 50.06
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 66.0 64.1 62.3 56.3 64.9 65.5
MEDIUM TRUCKS 58.5 57.0 50.6 49.1 57.5 57.8
HEAVY TRUCKS 59.7 58.3 49.3 50.5 58.9 59.0
NOISE LEVELS (dBA)67.5 65.7 62.8 57.9 66.5 66.9
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 66.0 64.1 62.3 56.3 64.9 65.5
MEDIUM TRUCKS 58.5 57.0 50.6 49.1 57.5 57.8
HEAVY TRUCKS 59.7 58.3 49.3 50.5 58.9 59.0
NOISE LEVELS (dBA)67.5 65.7 62.8 57.9 66.5 66.9
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 25 78 247 781
LDN 22 70 221 699
VEHICLE MIX DATA MISC. VEHICLE INFO
NOISE INPUT DATA Cumulative Warehouse
ROADWAY CONDITIONS RECEIVER INPUT DATA
SITE CONDITIONS WALL INFORMATION
NOISE CONTOUR (FT)
DAY GRADE ADJUSTMENT
0.775 - -
0.848 - -
0.865 0.00
NOISE OUTPUT DATA
NOISE IMPACTS (WITHOUT TOPO OR BARRIER SHIELDING)
NOISE IMPACTS (WITH TOPO AND BARRIER SHIELDING)
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Shinohara Industrial Project, Distribution Model JOB #:0623-2021-09
ROADWAY:Shinohara to Main DATE:3-Nov-22
LOCATION:FACADE ENGINEER:F. Irarrazabal
ADT =18,235 RECEIVER DISTANCE = 50
SPEED =35 DIST C/L TO WALL =40
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =10
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,824 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 10 HTH WALL=0.0
MEDIUM TRUCKS =10 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =10 BARRIER =0 (0 = WALL, 1 = BERM)
VEHICLE TYPE EVENING NIGHT DAILY VEHICLE TYPE HEIGHT SLE DISTANCE
AUTOMOBILES 0.129 0.096 0.9742 AUTOMOBILES 2.0 50.12
MEDIUM TRUCKS 0.049 0.103 0.0184 MEDIUM TRUCKS 4.0 50.02
HEAVY TRUCKS 0.027 0.108 0.0074 HEAVY TRUCKS 8.0 50.06
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 66.8 64.9 63.1 57.1 65.7 66.3
MEDIUM TRUCKS 59.3 57.8 51.4 49.9 58.3 58.5
HEAVY TRUCKS 60.5 59.1 50.1 51.3 59.7 59.8
NOISE LEVELS (dBA)68.3 66.5 63.6 58.7 67.2 67.7
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 66.8 64.9 63.1 57.1 65.7 66.3
MEDIUM TRUCKS 59.3 57.8 51.4 49.9 58.3 58.5
HEAVY TRUCKS 60.5 59.1 50.1 51.3 59.7 59.8
NOISE LEVELS (dBA)68.3 66.5 63.6 58.7 67.2 67.7
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 30 94 296 937
LDN 27 84 265 839
VEHICLE MIX DATA MISC. VEHICLE INFO
NOISE INPUT DATA Cumulative Distribution
ROADWAY CONDITIONS RECEIVER INPUT DATA
SITE CONDITIONS WALL INFORMATION
NOISE CONTOUR (FT)
DAY GRADE ADJUSTMENT
0.775 - -
0.848 - -
0.865 0.00
NOISE OUTPUT DATA
NOISE IMPACTS (WITHOUT TOPO OR BARRIER SHIELDING)
NOISE IMPACTS (WITH TOPO AND BARRIER SHIELDING)
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Shinohara Industrial Project, Warehousing Model JOB #:0623-2021-09
ROADWAY:Shinohara to Main DATE:21-Oct-22
LOCATION:FACADE ENGINEER:F. Irarrazabal
ADT =8,500 RECEIVER DISTANCE = 50
SPEED =35 DIST C/L TO WALL =40
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =10
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =850 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 10 HTH WALL=0.0
MEDIUM TRUCKS =10 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =10 BARRIER =0 (0 = WALL, 1 = BERM)
VEHICLE TYPE EVENING NIGHT DAILY VEHICLE TYPE HEIGHT SLE DISTANCE
AUTOMOBILES 0.129 0.096 0.9742 AUTOMOBILES 2.0 50.12
MEDIUM TRUCKS 0.049 0.103 0.0184 MEDIUM TRUCKS 4.0 50.02
HEAVY TRUCKS 0.027 0.108 0.0074 HEAVY TRUCKS 8.0 50.06
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 63.5 61.6 59.8 53.7 62.4 63.0
MEDIUM TRUCKS 56.0 54.4 48.1 46.5 55.0 55.2
HEAVY TRUCKS 57.2 55.8 46.8 48.0 56.4 56.5
NOISE LEVELS (dBA)65.0 63.2 60.3 55.4 63.9 64.4
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 63.5 61.6 59.8 53.7 62.4 63.0
MEDIUM TRUCKS 56.0 54.4 48.1 46.5 55.0 55.2
HEAVY TRUCKS 57.2 55.8 46.8 48.0 56.4 56.5
NOISE LEVELS (dBA)65.0 63.2 60.3 55.4 63.9 64.4
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 14 44 138 437
LDN 12 39 124 391
NOISE CONTOUR (FT)
DAY GRADE ADJUSTMENT
0.775 - -
0.848 - -
0.865 0.00
NOISE OUTPUT DATA
NOISE IMPACTS (WITHOUT TOPO OR BARRIER SHIELDING)
NOISE IMPACTS (WITH TOPO AND BARRIER SHIELDING)
VEHICLE MIX DATA MISC. VEHICLE INFO
NOISE INPUT DATA Existing + Project Warehousing
ROADWAY CONDITIONS RECEIVER INPUT DATA
SITE CONDITIONS WALL INFORMATION
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Shinohara Industrial Project, Distribution Model JOB #:0623-2021-09
ROADWAY:Shinohara to Main DATE:21-Oct-22
LOCATION:FACADE ENGINEER:F. Irarrazabal
ADT =12,500 RECEIVER DISTANCE = 50
SPEED =35 DIST C/L TO WALL =40
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =10
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,250 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 10 HTH WALL=0.0
MEDIUM TRUCKS =10 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =10 BARRIER =0 (0 = WALL, 1 = BERM)
VEHICLE TYPE EVENING NIGHT DAILY VEHICLE TYPE HEIGHT SLE DISTANCE
AUTOMOBILES 0.129 0.096 0.9742 AUTOMOBILES 2.0 50.12
MEDIUM TRUCKS 0.049 0.103 0.0184 MEDIUM TRUCKS 4.0 50.02
HEAVY TRUCKS 0.027 0.108 0.0074 HEAVY TRUCKS 8.0 50.06
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 65.1 63.2 61.5 55.4 64.0 64.6
MEDIUM TRUCKS 57.6 56.1 49.8 48.2 56.7 56.9
HEAVY TRUCKS 58.9 57.5 48.4 49.7 58.0 58.2
NOISE LEVELS (dBA)66.6 64.9 62.0 57.1 65.6 66.1
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 65.1 63.2 61.5 55.4 64.0 64.6
MEDIUM TRUCKS 57.6 56.1 49.8 48.2 56.7 56.9
HEAVY TRUCKS 58.9 57.5 48.4 49.7 58.0 58.2
NOISE LEVELS (dBA)66.6 64.9 62.0 57.1 65.6 66.1
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 20 64 203 642
LDN 18 58 182 575
NOISE CONTOUR (FT)
- -
0.00
0.848
0.865
NOISE OUTPUT DATA
NOISE IMPACTS (WITHOUT TOPO OR BARRIER SHIELDING)
NOISE IMPACTS (WITH TOPO AND BARRIER SHIELDING)
VEHICLE MIX DATA MISC. VEHICLE INFO
0.775 - -
GRADE ADJUSTMENTDAY
NOISE INPUT DATA Existing+Project Distribution Center
ROADWAY CONDITIONS RECEIVER INPUT DATA
SITE CONDITIONS WALL INFORMATION
Appendix E:
Construction Noise Modeling Output
Activity
Leq at 293 feet
dBA
LMax at 293 feet
dBA
Grading 70 74
Building Construction 66 70
Paving 68 72
Architectural Coating 63 67
Equipment Summary
Reference (dBA)
50 ft Lmax
Rock Drills 96
Jack Hammers 82
Pneumatic Tools 85
Pavers 80
Dozers 85
Scrappers 87
Haul Trucks 88
Cranes 82
Portable Generators 80
Rollers 80
Tractors 80
Front-End Loaders 86
Hydraulic Excavators 86
Graders 86
Air Compressors 86
Trucks 86
Grading
Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements
Lmax Leq
1 Earthmover 86 2 40 293 0.5 0 69.8 65.8 3831298.12
2 Grader 86 1 40 293 0.5 0 66.8 62.8 1915649.06
3 Excavator 86 1 40 293 0.5 0 66.8 62.8 1915649.06
4 Rubber Tired Dozer 85 1 40 293 0.5 0 65.8 61.8 1521654.14
5 Tractor/Backhoe/Loader 80 1 40 293 0.5 0 60.8 56.8 481189.289
Source: MD Acoustics, July 2022.Lmax*74 Leq 70
1- Percentage of time that a piece of equipment is operating at full power.Lw 105 Lw 101
dBA – A-weighted Decibels
Lmax- Maximum Level
Leq- Equivalent Level
Feet Meters Ground Effect
No
Shielding
Leq dBA
1 dBA
Shielding
Leq dBA
2 dBA
Shielding
Leq dBA
3 dBA
Shielding
Leq dBA
4 dBA
Shielding
Leq dBA
5 dBA
Shielding
Leq dBA
6 dBA
Shielding
Leq dBA
7 dBA
Shielding
Leq dBA
8 dBA
Shielding
Leq dBA
9 dBA
Shielding
Leq dBA
10 dBA
Shielding
Leq dBA
11 dBA
Shielding
LeqdBA
12 dBA
Shielding
Leq dBA
13 dBA
Shielding
Leq dBA
14 dBA
Shielding
Leq dBA
15 dBA
Shielding
Leq dBA
50 15.2 0.5 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55
60 18.3 0.5 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53
70 21.3 0.5 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
80 24.4 0.5 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
90 27.4 0.5 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
100 30.5 0.5 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47
110 33.5 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
120 36.6 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
130 39.6 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
140 42.7 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
150 45.7 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
160 48.8 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
170 51.8 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
180 54.9 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
190 57.9 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
200 61.0 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
210 64.0 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
220 67.1 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
230 70.1 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
240 73.1 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
250 76.2 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
260 79.2 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
270 82.3 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
280 85.3 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
290 88.4 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
300 91.4 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
310 94.5 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
320 97.5 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
330 100.6 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
340 103.6 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
350 106.7 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
360 109.7 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
370 112.8 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
Shielding
(dBA)
Calculated (dBA)
EnergyNo.Equipment Description
Reference (dBA)
50 ft Lmax
Ground
EffectQuantity
Usage
Factor1
Distance to
Receptor
(ft)
Building Construction
Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements
Lmax Leq
1 Tractor/Backhoe/Loader 80 1 40 293 0.5 0 60.8 56.8 481189.289
2 Cranes 82 1 40 293 0.5 0 62.8 58.8 762633.628
3 Forklift/Tractor 80 3 40 293 0.5 0 65.6 61.6 1443567.87
4 Generator 80 1 50 293 0.5 0 60.8 57.8 601486.611
5 Welder 81 1 40 293 0.5 0 61.8 57.8 605781.423
Source: MD Acoustics, July 2022.Lmax*70 Leq 66
1- Percentage of time that a piece of equipment is operating at full power.Lw 101 Lw 98
dBA – A-weighted Decibels
Lmax- Maximum Level
Leq- Equivalent Level
Feet Meters Ground Effect
No
Shielding
Leq dBA
1 dBA
Shielding
Leq dBA
2 dBA
Shielding
Leq dBA
3 dBA
Shielding
Leq dBA
4 dBA
Shielding
Leq dBA
5 dBA
Shielding
Leq dBA
6 dBA
Shielding
Leq dBA
7 dBA
Shielding
Leq dBA
8 dBA
Shielding
Leq dBA
9 dBA
Shielding
Leq dBA
10 dBA
Shielding
Leq dBA
11 dBA
Shielding
LeqdBA
12 dBA
Shielding
Leq dBA
13 dBA
Shielding
Leq dBA
14 dBA
Shielding
Leq dBA
15 dBA
Shielding
Leq dBA
50 15.2 0.5 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
60 18.3 0.5 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
70 21.3 0.5 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47
80 24.4 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
90 27.4 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
100 30.5 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
110 33.5 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
120 36.6 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
130 39.6 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
140 42.7 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
150 45.7 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
160 48.8 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
170 51.8 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
180 54.9 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
190 57.9 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
200 61.0 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
210 64.0 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
220 67.1 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
230 70.1 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
240 73.1 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
250 76.2 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
260 79.2 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
270 82.3 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
280 85.3 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
290 88.4 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
300 91.4 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
310 94.5 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
320 97.5 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
330 100.6 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
340 103.6 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
350 106.7 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
360 109.7 0.5 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
370 112.8 0.5 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
Ground
Effect
Shielding
(dBA)
Calculated (dBA)
EnergyNo.Equipment Description
Reference (dBA)
50 ft Lmax Quantity
Usage
Factor1
Distance to
Receptor
(ft)
Paving
Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements
Lmax Leq
1 Pavers 86 2 40 293 0.5 0 69.8 65.8 3831298.12
2 Rollers 80 2 40 293 0.5 0 63.8 59.8 962378.577
3 Paving Equipment 80 2 40 293 0.5 0 63.8 59.8 962378.577
Source: MD Acoustics, July 2018.Lmax*72 Leq 68
1- Percentage of time that a piece of equipment is operating at full power.Lw 103 Lw 99
dBA – A-weighted Decibels
Lmax- Maximum Level
Leq- Equivalent Level
Feet Meters Ground Effect
No
Shielding
Leq dBA
1 dBA
Shielding
Leq dBA
2 dBA
Shielding
Leq dBA
3 dBA
Shielding
Leq dBA
4 dBA
Shielding
Leq dBA
5 dBA
Shielding
Leq dBA
6 dBA
Shielding
Leq dBA
7 dBA
Shielding
Leq dBA
8 dBA
Shielding
Leq dBA
9 dBA
Shielding
Leq dBA
10 dBA
Shielding
Leq dBA
11 dBA
Shielding
LeqdBA
12 dBA
Shielding
Leq dBA
13 dBA
Shielding
Leq dBA
14 dBA
Shielding
Leq dBA
15 dBA
Shielding
Leq dBA
50 15.2 0.5 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53
60 18.3 0.5 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
70 21.3 0.5 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
80 24.4 0.5 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47
90 27.4 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
100 30.5 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
110 33.5 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
120 36.6 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
130 39.6 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
140 42.7 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
150 45.7 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
160 48.8 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
170 51.8 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
180 54.9 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
190 57.9 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
200 61.0 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
210 64.0 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
220 67.1 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
230 70.1 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
240 73.1 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
250 76.2 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
260 79.2 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
270 82.3 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
280 85.3 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
290 88.4 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
300 91.4 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
310 94.5 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
320 97.5 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
330 100.6 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
340 103.6 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
350 106.7 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
360 109.7 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
370 112.8 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
Ground
Effect
Shielding
(dBA)
Calculated (dBA)
EnergyNo.Equipment Description
Reference (dBA)
50 ft Lmax Quantity
Usage
Factor1
Distance to
Receptor
(ft)
Architectural Coating
Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements
Lmax Leq
1 Air Compressor 86 1 40 290 0.5 0 66.9 62.9 1965576.75
Source: MD Acoustics, LLC - Sept. 2021.Lmax*67 Leq 63
1- Percentage of time that a piece of equipment is operating at full power.Lw 99 Lw 95
dBA – A-weighted Decibels
Lmax- Maximum Level
Leq- Equivalent Level
Feet Meters Ground Effect
No
Shielding
Leq dBA
1 dBA
Shielding
Leq dBA
2 dBA
Shielding
Leq dBA
3 dBA
Shielding
Leq dBA
4 dBA
Shielding
Leq dBA
5 dBA
Shielding
Leq dBA
6 dBA
Shielding
Leq dBA
7 dBA
Shielding
Leq dBA
8 dBA
Shielding
Leq dBA
9 dBA
Shielding
Leq dBA
10 dBA
Shielding
Leq dBA
11 dBA
Shielding
LeqdBA
12 dBA
Shielding
Leq dBA
13 dBA
Shielding
Leq dBA
14 dBA
Shielding
Leq dBA
15 dBA
Shielding
Leq dBA
50 15.2 0.5 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
60 18.3 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
70 21.3 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
80 24.4 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
90 27.4 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
100 30.5 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
110 33.5 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
120 36.6 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
130 39.6 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
140 42.7 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
150 45.7 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
160 48.8 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
170 51.8 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
180 54.9 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
190 57.9 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
200 61.0 0.5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
210 64.0 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
220 67.1 0.5 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
230 70.1 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
240 73.1 0.5 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
250 76.2 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
260 79.2 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
270 82.3 0.5 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
280 85.3 0.5 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
290 88.4 0.5 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
300 91.4 0.5 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
310 94.5 0.5 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
320 97.5 0.5 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
330 100.6 0.5 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
340 103.6 0.5 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
350 106.7 0.5 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
360 109.7 0.5 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
370 112.8 0.5 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
No.Equipment Description
Reference (dBA)
50 ft Lmax Quantity
Usage
Factor1
Distance to
Receptor
(ft)
Ground
Effect
Shielding
(dBA)
Calculated (dBA)
Energy
Project: 517 Shinohara Lane Chula Vista Date:5/17/22
Source:Large Bulldozer
Scenario:Unmitigated
Location:
Address:
PPV = PPVref(25/D)^n (in/sec)
Equipment =INPUT SECTION IN BLUE
Type
PPVref =0.089 Reference PPV (in/sec) at 25 ft.
D =30.00 Distance from Equipment to Receiver (ft)
n = 1.10 Vibration attenuation rate through the ground
PPV =0.073 IN/SEC OUTPUT IN RED
DATA OUT RESULTS
2 Large Bulldozer
Note: Based on reference equations from Vibration Guidance Manual, California Department of Transportation, 2006, pgs 38-43.
VIBRATION LEVEL IMPACT
Project Site
DATA INPUT
Project: 517 Shinohara Lane Chula Vista Date:7/30/21
Source:Large Bulldozer
Scenario:Unmitigated
Location:
Address:
PPV = PPVref(25/D)^n (in/sec)
Equipment =INPUT SECTION IN BLUE
Type
PPVref =0.089 Reference PPV (in/sec) at 25 ft.
D =293.00 Distance from Equipment to Receiver (ft)
n = 1.10 Vibration attenuation rate through the ground
PPV =0.006 IN/SEC OUTPUT IN RED
DATA OUT RESULTS
2 Large Bulldozer
Note: Based on reference equations from Vibration Guidance Manual, California Department of Transportation, 2006, pgs 38-43.
VIBRATION LEVEL IMPACT
Project Site
DATA INPUT
Appendix F:
Concept Grading
Appendix G:
Cumulative Project Analysis
Shinohara Cumulative Project List
1. Project Site – DR21-0032 – To develop a 178,156 square-foot single-story industrial
building for warehousing and office uses on a vacant 9.72-acre parcel. Hours of operation are
proposed as a 24-hour operation, seven days a week, with 3 varying shifts. The subject site is
zoned ILP (Limited Industrial Precise Plan) and a General Plan designation of IL (Limited
Industrial). The project will include one entitlement for a Design Review DR21-0032 and a
Mitigated Negative Declaration with Mitigation Measures and Reporting Program IS21-0006,
subject to review and approval by the Planning Commission of the City of Chula Vista.
2. 1810 Main Court – In-N-Out Restaurant.
3. 1891 Nirvana Avenue – Cannabis Dispensary – Conditional Use Permit to allow the
operation of a storefront retail cannabis business within an existing 3,221 sq. ft. industrial
building on a 1.05-acre site located within the General Industrial (I) zone.
4. NWC Heritage/Santa Maya – Escaya Industrial – Design Review Permit to allow the
construction of three industrial shell buildings. The site is in the Otay Ranch Village 3 Sectional
Planning Area (SPA) and has a zoning designation of Industrial (I) and a General Plan designation
of Limited Industrial (IL).
5. 1855 Maxwell Road – CV School district Vehicle Repair Shop – Design Review to construct
a proposed one-story, 15,500 sq. ft. building for vehicle repair of school buses and office space
for the Chula Vista Elementary School District.
6. 821 Main Street – Nirvana Business Park – DR21-0024 for the review of the site plan and
the three proposed warehouse buildings, and the self-storage building. Building 1 is proposed as
59,044 square feet, Building 2 is proposed as 44,592 square feet, Building 3 is proposed as three-
stories 140,802 square feet for self-storage, and building 4 is proposed as 50,030 square feet. A
Tentative Parcel Map – TPM21-0003 is also proposed to subdivide the 13.31-acre property into
four (4) parcels, one for each of the buildings. The four parcels' public right-of-way is provided
via a private access easement to Nirvana Avenue.
7. 750 Main Street – Maxwell @ Main – Development of 8.21 gross-acre site within the Auto
Park East Specific Plan. The project includes a Design Review, a Tentative Tract Map (seven lots),
and a Notice of Exemption (under the Auto Park East Specific Plan Mitigated Negative
Declaration. The site is General Plan designated IL – Limited Industrial and Zoned (ILP) Limited
Industrial and is located within the Auto Park East Specific Plan. The seven commercial buildings
proposed are as follows:
• Building A – a 2,551-square-foot drive-through restaurant
• Building B – a 2,164-square-foot drive-through restaurant
• Building C – a 4,446-square-foot retail car wash
• Building D – a 2,400-square-foot drive-through restaurant
• Building E – a gasoline station with a 4,620-square-foot convenience store (with a type 20
off-site beer and wine license) and a 4,596-square-foot canopy covering eight dispensers,
• Building F– a 2,221-square-foot drive-through restaurant
• Building G – a 16,89- square-foot collision (auto-repair) facility
8. 1875 Auto Park Avenue – Mossy Chrysler Dodge Ram & Jeep Chula Vista Showroom &
Sales Office – DR20-0025 – Design Review for a two-story, 54,400 square foot building and a
detached 1,200 square foot carwash for a Mossy automobile dealership with automotive repair
services and associated carwash on approximately 6.51 acres within the Auto Park North Specific
Plan.
9. 670 Main Street – BMW – DR17-0031 – Design Review consideration of a two-story,
37,600 sq. ft. building for a BMW auto dealership with auto repair/service and associated
carwash on approximately 4.2 acres.
10. 1880 Auto Park Place – Automotive Repair – DR19- 0025 – Design Review consideration
of a 27, 821 square-foot building with a 4, 185 square-foot covered entryway for supportive uses
to include a vehicle collision and automotive repair facility.