HomeMy WebLinkAboutAttachment 8J - Noise Impact Study
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA
Prepared for:
Mr. Steven Schwarz
VWP-OP Nirvana Owner, LLC
2390 E. Camelback Rd. Ste. 305
Phoenix, AZ 85016
Prepared by:
MD Acoustics, LLC
Mike Dickerson, INCE
Robert Pearson
1197 Los Angeles Avenue, Ste 256
Simi Valley, CA 93065
Date: 8/1/2023
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Table of Contents
MD Acoustics, LLC ii
JN: 06232104_Report 8.1.23.docx
TABLE OF CONTENTS
1.0 Introduction .................................................................................................................................... 1
1.1 Purpose of Analysis and Study Objectives 1
1.2 Site Location and Study Area 1
1.3 Proposed Project Description 1
2.0 Fundamentals of Noise ................................................................................................................... 4
2.1 Sound, Noise and Acoustics 4
2.2 Frequency and Hertz 4
2.3 Sound Pressure Levels and Decibels 4
2.4 Addition of Decibels 4
2.5 Human Response to Changes in Noise Levels 5
2.6 Noise Descriptors 5
2.7 Traffic Noise Prediction 6
2.8 Sound Propagation 6
3.0 Ground-Borne Vibration Fundamentals ......................................................................................... 8
3.1 Vibration Descriptors 8
3.2 Vibration Perception 8
3.3 Vibration Propagation 8
4.0 Regulatory Setting ........................................................................................................................... 9
4.1 Federal Regulations 9
4.2 State Regulations 9
4.3 City of Chula Vista Noise Regulations 10
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 Short-Term Noise Measurement Results 18
7.0 Future Noise Environment Impacts and Mitigation ..................................................................... 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 20
7.1.3 Noise Impacts to On/Off-Site Receptors Due to Project
Maintenance Equipment 22
8.0 Construction Noise Impact ........................................................................................................... 24
8.1 Construction Noise 24
8.2 Construction Vibration 25
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8.3 Construction Noise Reduction Policies 26
9.0 References .................................................................................................................................... 27
LIST OF APPENDICES
Appendix A: Photographs and Field Measurement Data ....................................................................... 1
Appendix B: SoundPlan Input/Output .................................................................................................... 2
Appendix C: Construction Input ............................................................................................................. 3
Appendix D: Traffic Noise Calculations ................................................................................................... 4
Appendix E: Cumulative Project Analysis ............................................................................................... 5
LIST OF EXHIBITS
Exhibit A: Location Map ..................................................................................................................... 2
Exhibit B: Site Plan .............................................................................................................................. 3
Exhibit C: Typical A-Weighted Noise Levels ....................................................................................... 4
Exhibit D: Land Use Compatibility Guidelines .................................................................................. 10
Exhibit E: Measurement Locations .................................................................................................. 17
Exhibit F: Operational Noise Levels Leq(h) ...................................................................................... 23
LIST OF TABLES
Table 1: Table III Exterior Noise Limits ...................................................................................................... 11
Table 2: Table IV Maximum permissible dwelling interior sound levels .................................................. 11
Table 3: Reference Sound Level Measurements for SoundPlan Model1 .................................................. 15
Table 4: Roadway Parameters and Vehicle Distribution .......................................................................... 16
Table 5: Short-Term Noise Measurement Data (dBA) .............................................................................. 18
Table 6: Worst-case Predicted Operational Leq Noise Level1 .................................................................. 20
Table 7: Change in Noise Level Characteristics1 ....................................................................................... 20
Table 8: Existing Scenario - Noise Levels Along Roadways (dBA CNEL)1,2 ................................................ 21
Table 9: Typical Construction Equipment Noise Levels1 ........................................................................... 24
Table 10: Guideline Vibration Damage Potential Threshold Criteria ....................................................... 25
Table 11: Vibration Source Levels for Construction Equipment ............................................................... 26
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Introduction
1
1.0 Introduction
1.1 Purpose of Analysis and Study Objectives
This noise assessment was prepared to evaluate the potential noise impacts for the project study area
and to recommend noise mitigation measures, if necessary, to minimize the potential noise impacts. The
assessment was conducted and compared to the noise standards set forth by the Federal , State and
Local agencies. Consistent with the City’s Noise Guidelines, the project must demonstrate compliance to
the applicable noise criterion as outlined within the City’s Noise Element and Municipal Code .
The following is provided in this report:
• A description of the study area and the proposed project
• Information regarding the fundamentals of noise
• A description of the local noise guidelines and standards
• An 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 821 Main Street between Nirvana Avenue and Heritage Road 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 Diagra m and the proposed use
is industrial. Land uses surrounding the site include retention area for Escaya to the east, heavy industrial
uses to the north like LKQ Pick Your Part ,heavy industrial uses to the west like Bradford Powder Coating,
and Main Street to the south with open space further south . The closest existing sensitive receptors (to
the site area) are the single-family residential land uses located approximately 1,425 feet (~435 meters)
northeast and 1,430 feet (~436 meters) southwest of the project site.
1.3 Proposed Project Description
The approximately 13.31-acre project site is proposed to be developed with three new industrial
buildings and one new storage building totaling 299,218 square feet of industrial building. Hours of
operation for the business park are planned to be Monday through Friday 6:00 a.m. to 6:00 p.m. and
Saturday 6:00 a.m. to noon. The self-storage facilities will have 24/7 access. Exhibit B demonstrates the
site plan for the project.
Construction activities within the Project area will consist of on -site grading, building, paving, and
architectural coating.
Chula Vista Self Storage
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Chula Vista, CA
Exhibit A
Location Map
2
Introduction
Exhibit B
Site Plan
3
Introduction
Chula Vista Nirvana Business Park
Noise Impact Study
821 Main Street, City of Chula Vista, CA
Chula Vista Nirvana Business Park
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City of Chula Vista, CA Fundamentals of Noise
4
2.0 Fundamentals of Noise
This section of the report provides basic information about noise and presents some of the ter ms 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 pred ominant sound.
Exhibit C: Typical A-Weighted Noise Levels
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City of Chula Vista, CA Fundamentals of Noise
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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 res ults 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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City of Chula Vista, CA Fundamentals of Noise
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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 noi se 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) rat her 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
8
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 the ir 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: T he
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/in terior 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 ordina nces 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 St ate 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 guidelines rank noise land use compatibility in terms of normally
acceptable, conditionally acceptable, normally unacceptable, and clearly unacceptable as illustrated in
Exhibit D.
Exhibit D: Land Use Compatibility Guidelines
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.
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Table 1: Table III Exterior Noise Limits
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
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
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
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 vicini ty
between the hours of 10:00 p.m. and 7:00 a.m., Monday through Friday, and between the hours of
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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 City’s noise ordinance, the 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 project site’s boundary. Three (3) short-term 10-
minute noise measurements were conducted at the site’s property lines and is 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.
The future worst-case noise level projections were modeled using referenced sound level data for the
various stationary on-site sources (parking spaces and loading docks). The model assumes that the
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building facility has a total of five (5) dock high truck doors and sixteen (16) grade level truck doors for
loading and unloading, and approximately 309 parking spaces.
Trucks idling at the dock high door loading and unloading area were modeled as a point source with a
reference noise level of 74 dBA 10 feet from the source idling continuously for an hour. This is a
conservative measure as the trucks will likely only idle for a few minutes within an hour.
Truck back up beepers at the grade level door loading and unloading areas were modeled as a point
source with a reference noise level of 69 dBA Leq at 5 ft active for 5 minutes in an hour.
MD added two 7.5-ton HVAC units to the corners each building to account for HVAC noise. There are no
parapets in the model as a worst-case. The actual HVAC equipment will likely be much quieter and placed
further from the edges of the building.
The cars idling and coming and going in the parking spots were modeled at 3 cars per hour.
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.
Finally, the model is able to evaluate the noise attenuating effects of any existing or proposed property
line walls. Input and output calculations are provided in Appendix C.
Table 3: Reference Sound Level Measurements for SoundPlan Model 1
Source Source Type Reference Level (dBA) Descriptor
Idling Semi Truck Point Source 74 10ft
Parking Area (SP Parking Tool) - 3 cars per hr
Back Up Beeper Point Source 69 5ft
Carrier 7.5 ton HVAC units Point 83 Sound Power
1. Reference noise levels in Appendix B
5.4 FHWA Traffic Noise Prediction Model
Per the Local Mobility Analysis Local Mobility Analysis, Chula Vista, California existing traffic counts
measured 14,260 ADT. The project is anticipated to create 1,549 ADT. Existing plus Project ADT are
anticipated to create a 2 dB increase in noise level. Therefore, the increase in traffic noise would be
negligible when compared to the existing noise
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
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Study Method and Procedure
16
traffic scoping agreement, The City’s traffic counts, and roadway classification. The traffic data is included
in Appendix D.
Table 4 indicates the roadway parameters and vehicle distribution utilized for this study.
Table 4: Roadway Parameters and Vehicle Distribution
Roadway Segment Existing
ADT1
Existing Plus
Project ADT1
Cumulative
Distribution1
Speed
(MPH) Site Conditions
Main Street Nirvana Ave to Heritage Rd 14,260 15,809 18,117 50 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 Linscott Law & Greenspan. 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, paving, and building phases of construction. The construction noise calculation
output worksheet is located in Appendix E. of the Noise Impact Study (Appendix M). The following
assumptions relevant to short-term construction noise impacts were used:
• It is estimated that construction will be carried out over 24-months. 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, paving, and building phases.
Exhibit E
Measurement Locations
17
Study Method and Procedure
1
Chula Vista Nirvana Business Park
Noise Impact Study
821 Main Street, City of Chula Vista, CA
1
= Short term measurement
SITE
23
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Existing Noise Environment
18
6.0 Existing Noise Environment
Three (3) ten-minute short-term ambient noise measurements were conducted at the property
boundary to the south, northwest, and northeast (See Appendix A). The measurement measured the
Leq, Lmin, Lmax and other statistical data (e.g., L2, L8…). The noise measurement was taken to determine
the existing ambient noise levels. Noise data indicates that traffic along main street and general
industrial noise is the primary source of noise impacting the site and the adjacent uses. This assessment
utilizes the ambient noise data as a basis and compares project operational levels to said data.
6.1 Short-Term Noise Measurement Results
The results of the noise data are presented in Table 5.
Table 5: Short-Term Noise Measurement Data (dBA)
Location Time dB(A)
LEQ LMAX LMIN L2 L8 L25 L50 L90
1 7:29PM-7:39PM 74 89 51 82 79 75 70 56
2 7:40PM-7:50PM 56 69 49 63 60 56 54 52
3 1:23PM-1:33PM 62 74 54 66 64 63 61 90
Notes:
1. Short-term noise monitoring location is illustrated in Exhibit E.
Noise data indicates the ambient noise level ranged between 56 dBA Leq to 74 dBA Leq near project site
and surrounding area. Maximum levels reach 89 dBA as a result of traffic along Main Street. Additional
field notes and photographs are provided in Appendix A.
For this evaluation, MD has utilized the ambient noise level and has compared the project’s projected
noise levels to the said ambient level.
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts and Mitigation
19
7.0 Future Noise Environment Impacts and Mitigation
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 trucks loading and unloading.
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
Adjacent uses that may be affected by project operational noise include general industrial to the north,
south, east, and west. The single-family residential land uses located approximately 1,425 feet northeast
and 1,430 feet southwest of the project site will not be affected by the project. The worst-case stationary
noise was modeled using SoundPLAN acoustical modeling software. Worst-case assumes that all project
activities are always operational when in reality the noise will be intermittent and cycle on/off depending
on usage.
A total of three (3) receptors were modeled to evaluate the proposed project’s operational impact. A
receptor is denoted by a yellow dot. All yellow dots represent a property line or building facade.
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.
Project Operational Noise Levels
Exhibit F shows the “project only” operational noise levels at the property lines and adjacent areas.
Exhibit F shows the noise contours at the project site and illustrates how the noise will propagate at the
site. Project only noise levels range from 46 to 58 dBA.
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 measure 60 to 74 dBA Leq at receptors (R1 – R3).
<Table 6 Next Page>
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts and Mitigation
20
Table 6: Worst-case Predicted Operational Leq Noise Level1
Receptor1
Existing Ambient
Noise Level
(dBA, Leq)2
Project
Noise
Level
(dBA, Leq)
Total Combined
Noise Level
(dBA, Leq(h))
Exterior Noise
Limit Nighttime
10PM to 7AM
(dBA,Leq)3
Change in Noise
Level as Result of
Project
1 62 53 63
70
1
2 56 58 60 4
3 74 46 74 0
Notes:
1. Receptor 1 to Receptor 3 represent the nearest property lines
2. The measured existing ambient condition.
3. Per Chula Vista Municipal Code Sec 19.68.030 Nighttime Industrial noise limit is 70 dBA.
As shown in Table 6, the project only noise levels will not exceed the City’s exterior nighttime noise limit
of 70 dBA. The project plus ambient noise levels will increase the worst-case noise level by approximately
0 to 4 dBA Leq depending on location. It takes a change of 3 dBA to hear a noticeable difference. The
increase in noise level is below the typical noticeable difference in change of noise levels.
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
1https://www.fhwa.dot.gov/environMent/noise/regulations_and_guidance/polguide/polguide02.cfm
The change in noise level would fall within the “Not Perceptible” to “Clearly Noticeable” acoustic
characteristic depending on location. Based on the industrial land use of the receiving property, lack of
sensitive receptors to the location, and that the City of Chula Vista noise limit is not exceeded at the
property line, the change in noise level would be less than significant.
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 furth er 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:
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts and Mitigation
21
Existing Year (without Project): This scenario refers to existing year traffic noise conditions.
Existing Year (Plus Project): This scenario refers to existing year + project traffic noise conditions .
Cumulative (Plus Project): This scenario refers to existing year + cumulative traffic + project traffic noise
conditions.
Table 8 compares the existing, existing with project scenario, and cumulative project 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 1.0 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 p roposed sensitive receptor would be 70 dBA CNEL or
less and the change in noise level is 3 dBA or less.
Table 8: Existing Scenario - Noise Levels Along Roadways (dBA CNEL)1,2
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
Main
Street
Nirvana Ave to
Heritage Rd 69.3 45 97 208 449
Existing With Project Exterior Noise Levels
Segment
CNEL
at 50 Ft (dBA)
Distance to Contour (Ft)
Roadway 70 dBA CNEL 65 dBA CNEL 60 dBA CNEL 55 dBA
CNEL
Main
Street
Nirvana Ave to
Heritage Rd 69.7 48 104 223 481
Cumulative Projects Exterior Noise Levels
Segment
CNEL
at 50 Ft (dBA)
Distance to Contour (Ft)
Roadway 70 dBA CNEL 65 dBA CNEL 60 dBA CNEL 55 dBA
CNEL
Main
Street
Nirvana Ave to
Heritage Rd 70.3 53 113 244 526
Change in Existing Noise Levels as a Result of Project
Segment
CNEL at 50 Feet dBA2
Roadway1 Existing
Without Project
Cumulative
Project
Change in
Noise Level
Potential
Significant Impact
Main
Street
Nirvana Ave to
Heritage Rd 69.3 70.3 1.0 No
Notes:
1 Exterior noise levels calculated at 5 feet above ground level.
2 Noise levels calculated from centerline of subject roadway.
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Future Noise Environment Impacts and Mitigation
22
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).
Exhibit F
Future Operational Noise Levels
23
Future Noise Environment Impacts and Mitigation
Chula Vista Nirvana Business Park
Noise Impact Study
821 Main Street, City of Chula Vista, CA
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
24
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 Levels1
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 is considered a short-term impact and would be considered significant if construction
activities are taken outside the allowable times as described in the City’s Municipal Code 17.24.040(C)(8).
Construction is anticipated to occur during the permissible hours of 7AM to 10PM on weekdays and 8AM
to 10PM Saturday and Sunday according to the City’s Municipal Code. Construction noise will have a
temporary or periodic increase in the ambient noise level above the existing within the project vicinity .
Furthermore, noise reduction measures are provided to further reduce construction noise. The impact
is considered less than significant however construction noise level projections are provided.
Typical operating cycles for these types of construction e quipment may involve one or two minutes of
full power operation followed by three to four minutes at lower power settings. Noise levels will be
loudest during grading phase. A likely worst-case construction noise scenario during grading assumes
the use of 1-grader, 1-dozer, 2-excavators, 2-backhoes, and 2-scrapers operating at the center of the
site, 250 feet from the property boundary.
Assuming a usage factor of 40 percent for each piece of equipment, unmitigated noise levels at 250 feet
have the potential to reach 73 dBA Leq at the property boundary during building construction.
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
25
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.
<Table 11, next page>
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA Construction Noise Impact
26
Table 11: Vibration Source Levels for Construction Equipment1
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.
At a distance of 24 feet (distance of nearest structure from the site’s western boundary), a large
bulldozer would yield a worst-case 0.093 PPV (in/sec) which may be perceptible for short periods of time
during grading along the western property line of the project site but is below any threshold of damage.
The impact is less than significant, 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 shall 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.
3. The contractor shall 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 shall be turned off when not in use.
5. Equipment shall be maintained so that vehicles and their loads are secured from rattling and
banging.
Chula Vista Nirvana Business Park
Noise Impact Study
City of Chula Vista, CA References
27
9.0 References
State of California General Plan Guidelines: 1998. Governor’s Office of Planning and Research
City of Chula Vista: General Plan Noise Element.
City of Chula Vista: Municipal Code
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:Chula Vista Self Storage Site Observations:
Site Address/Location:Between Nirvana ave and Heritage Rd
Date:
Field Tech/Engineer:Jason Schuyler
General Location:
Sound Meter:NTi Audio SN:A2A-05967-E0 Site Topo:
Settings:A-weighted, slow, 1-sec, 10-minute interval Ground Type:
Meteorological Con.:Temps in the hi 70's, minimal wind, west-southwest, 5mphs
Site ID:ST-1 thru ST-3
3- 5' from Northwest property line
Figure 3: ST-2 Photo
Figure 2: ST-1 Photo
10-Minute Continuous Noise Measurement Datasheet
1 - 72' from CL of Main Street
2 - 5' from Northwest property line
Clear sky, measurements were performed on the site and measured the
baseline noise conditions. Winds 3-5MPH. Measurments taken at the
nearest property lines
Noise Source(s) w/ Distance:
Flat
soft site conditions,
Figure 1: Monitoring Locations
6/23/2021
1
23
10Min_Field Sheet Template_Awtg ST1-4.xlsx
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:Chula Vista Self Storage
Site Address/Location:Between Nirvana ave and Heritage Rd
Site ID:ST-1 thru ST-3
Location Start Stop Leq Lmax Lmin L2 L8 L25 L50 L90
1 12:38 PM 12:48 PM 74.3 88.8 51.2 82.3 78.9 75.2 70.1 59.5
2 12:54 PM 1:04 PM 56.2 69.1 49.0 63.1 60.1 56.3 54.0 51.7
3 1:23 PM 1:33 PM 66.8 76.2 50.4 71.9 70.5 68.6 65.7 56.4
10-Minute Continuous Noise Measurement Datasheet - Cont.
Table 1: Morning - Baseline Noise Measurement Summary
Figure 4: ST-3 Photo
10Min_Field Sheet Template_Awtg ST1-4.xlsx
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:Chula Vista Self Storage
Site Address/Location:Between Nirvana ave and Heritage Rd
Site ID:ST-1
10-Minute Continuous Noise Measurement Datasheet - Cont.
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
12:38:59 PM12:39:14 PM12:39:29 PM12:39:44 PM12:39:59 PM12:40:14 PM12:40:29 PM12:40:44 PM12:40:59 PM12:41:14 PM12:41:29 PM12:41:44 PM12:41:59 PM12:42:14 PM12:42:29 PM12:42:44 PM12:42:59 PM12:43:14 PM12:43:29 PM12:43:44 PM12:43:59 PM12:44:14 PM12:44:29 PM12:44:44 PM12:44:59 PM12:45:14 PM12:45:29 PM12:45:44 PM12:45:59 PM12:46:14 PM12:46:29 PM12:46:44 PM12:46:59 PM12:47:14 PM12:47:29 PM12:47:44 PM12:47:59 PM12:48:14 PM12:48:29 PM12:48:44 PMdBATime
ST-1: Ambient Noise Level (1-sec)ST-1
dBA, Leq
10Min_Field Sheet Template_Awtg ST1-4.xlsx
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:Chula Vista Self Storage
Site Address/Location:Between Nirvana ave and Heritage Rd
Site ID:ST-2
10-Minute Continuous Noise Measurement Datasheet - Cont.
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
12:54:59 PM12:55:14 PM12:55:29 PM12:55:44 PM12:55:59 PM12:56:14 PM12:56:29 PM12:56:44 PM12:56:59 PM12:57:14 PM12:57:29 PM12:57:44 PM12:57:59 PM12:58:14 PM12:58:29 PM12:58:44 PM12:58:59 PM12:59:14 PM12:59:29 PM12:59:44 PM12:59:59 PM1:00:14 PM1:00:29 PM1:00:44 PM1:00:59 PM1:01:14 PM1:01:29 PM1:01:44 PM1:01:59 PM1:02:14 PM1:02:29 PM1:02:44 PM1:02:59 PM1:03:14 PM1:03:29 PM1:03:44 PM1:03:59 PM1:04:14 PM1:04:29 PM1:04:44 PMdBATime
ST-2: Ambient Noise Level (1-sec)ST-2
dBA, Leq
10Min_Field Sheet Template_Awtg ST1-4.xlsx
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:Chula Vista Self Storage
Site Address/Location:Between Nirvana ave and Heritage Rd
Site ID:ST-3
10-Minute Continuous Noise Measurement Datasheet - Cont.
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
1:23:11 PM1:23:26 PM1:23:41 PM1:23:56 PM1:24:11 PM1:24:26 PM1:24:41 PM1:24:56 PM1:25:11 PM1:25:26 PM1:25:41 PM1:25:56 PM1:26:11 PM1:26:26 PM1:26:41 PM1:26:56 PM1:27:11 PM1:27:26 PM1:27:41 PM1:27:56 PM1:28:11 PM1:28:26 PM1:28:41 PM1:28:56 PM1:29:11 PM1:29:26 PM1:29:41 PM1:29:56 PM1:30:11 PM1:30:26 PM1:30:41 PM1:30:56 PM1:31:11 PM1:31:26 PM1:31:41 PM1:31:56 PM1:32:11 PM1:32:26 PM1:32:41 PM1:32:56 PMdBATime
ST-3: Ambient Noise Level (1-sec)ST-3
dBA, Leq
10Min_Field Sheet Template_Awtg ST1-4.xlsx
Appendix B:
SoundPlan Input/Output
5
* Minimum electric heat CFM exceptions:
LEGEND NOTES:
1. Outdoor sound data is measure in accordance with AHRI standard
270.
2. Measurements are expressed in terms of sound power. Do not
compare these values to sound pressure values because sound
pressure depends on specific environmental factors which nor-
mally do not match individual applications. Sound power values
are independent of the environment and therefore more accurate.
3. A-weighted sound ratings filter out very high and very low frequen-
cies, to better approximate the response of “average” human ear.
A-weighted measurements for Carrier units are taken in accor-
dance with AHRI standard 270.
MINIMUM - MAXIMUM AIRFLOWS (CFM) COOLING AND ELECTRIC HEAT
UNIT
COOLING ELECTRIC HEATERS
Minimum
CFM
Minimum CFM 2-Speed
Fan Motor (at High Speed)
Minimum CFM
2-Speed Fan Motor (at Low
Speed)
Maximum CFM Minimum CFM
Maximum
CFM
50HCQA04 900 N/A N/A 1500 900 1500
50HCQA05 1200 N/A N/A 2000 1200 2000
50HCQA06 1500 N/A N/A 2500 1500 2500
50HCQA07 1800 N/A N/A 3000 1800 3000
50HCQD07 1800 1800 1200 3000 1800 3000
50HCQD08 2250 2250 1500 3750 2250* 3750
50HCQD09 2550 2873 1915 4250 2252* 4250
50HCQD12 3000 3380 2253 5000 3000* 5000
UNIT UNIT VOLTAGE HEATER kW UNIT CONFIGURATION REQUIRED MINIMUM CFM
50HCQD08
50HCQD09 575 17.0 Horizontal or Vertical 2800
34.0 2350
50HCQD12
230
50.0 Vertical 3550
50.0 Horizontal 3420
43.5 Horizontal or Vertical 3040
575
50.0 Vertical 3150
33.5 Vertical 3520
33.5 Horizontal 3420
26.5 Vertical 3610
SOUND PERFORMANCE
50HCQ
UNIT
OUTDOOR SOUND (dB) AT 60 Hz
A-Weighted 63 125 250 500 1000 2000 4000 8000
A04 76 51.8 69.0 64.6 67.8 70.7 63.8 60.9 59.0
A05 79 56.1 69.6 68.7 72.5 72.8 68.9 65.0 61.2
A06 79 57.7 66.6 68.7 72.9 74.5 71.1 67.6 62.6
A07 81 86.7 82.7 79.1 78.4 75.4 71.2 67.8 62.9
D07 81 86.7 82.7 79.1 78.4 75.4 71.2 67.8 62.9
D08 83 87.3 81.6 79.7 80.6 79.0 73.5 69.2 66.1
D09 87 61.7 74.7 77.4 82.6 84.9 81.9 78.8 75.9
D12 83 61.0 67.3 75.1 77.7 78.1 75.5 71.2 66.7
dB — Decibel
Nirvana Chula Vista Self Storage Noise
Contribution level - 001 - Warehouse Night: Outdoor SP
9
Source Source group Source typeTr. lane Leq,n
dB(A)
A
dB
Receiver R1 Fl G Lr,lim dB(A) Leq,n 53.5 dB(A)
Loading 1 Default industrial noise Point 51.2 0.0
Loading 2 Default industrial noise Point 48.3 0.0
Parking 1 Default parking lot noise PLot 42.9 0.0
HVAC Default industrial noise Point 35.4 0.0
Beeper 1 Default industrial noise Point 26.3 0.0
HVAC Default industrial noise Point 23.9 0.0
Beeper 2 Default industrial noise Point 22.5 0.0
Beeper 3 Default industrial noise Point 18.6 0.0
HVAC Default industrial noise Point 18.2 0.0
Beeper 4 Default industrial noise Point 16.8 0.0
Loading 4 Default industrial noise Point 16.2 0.0
Beeper 5 Default industrial noise Point 15.5 0.0
Parking 22 Default parking lot noise PLot 14.9 0.0
HVAC Default industrial noise Point 14.4 0.0
Parking 2 Default parking lot noise PLot 13.7 0.0
Parking 8 Default parking lot noise PLot 11.8 0.0
Parking 18 Default parking lot noise PLot 11.8 0.0
Parking 17 Default parking lot noise PLot 11.5 0.0
Parking 9 Default parking lot noise PLot 11.3 0.0
Parking 3 Default parking lot noise PLot 11.2 0.0
HVAC Default industrial noise Point 11.0 0.0
HVAC Default industrial noise Point 10.8 0.0
Parking 7 Default parking lot noise PLot 10.8 0.0
Parking 4 Default parking lot noise PLot 9.9 0.0
Parking 10 Default parking lot noise PLot 9.9 0.0
Parking 6 Default parking lot noise PLot 9.7 0.0
Loading 3 Default industrial noise Point 9.6 0.0
Parking 15 Default parking lot noise PLot 9.5 0.0
Parking 5 Default parking lot noise PLot 9.3 0.0
Parking 16 Default parking lot noise PLot 9.2 0.0
Parking 19 Default parking lot noise PLot 9.1 0.0
Parking 11 Default parking lot noise PLot 8.7 0.0
Parking 14 Default parking lot noise PLot 8.2 0.0
Parking 13 Default parking lot noise PLot 7.5 0.0
Parking 24 Default parking lot noise PLot 7.4 0.0
Beeper 7 Default industrial noise Point 7.4 0.0
HVAC Default industrial noise Point 6.7 0.0
Parking 12 Default parking lot noise PLot 4.5 0.0
Beeper 6 Default industrial noise Point 4.2 0.0
Parking 37 Default parking lot noise PLot 4.0 0.0
HVAC Default industrial noise Point 3.9 0.0
Parking 20 Default parking lot noise PLot 3.8 0.0
Parking 34 Default parking lot noise PLot 3.7 0.0
Parking 32 Default parking lot noise PLot 3.6 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 1
Nirvana Chula Vista Self Storage Noise
Contribution level - 001 - Warehouse Night: Outdoor SP
9
Source Source group Source typeTr. lane Leq,n
dB(A)
A
dB
Parking 33 Default parking lot noise PLot 3.2 0.0
Parking 30 Default parking lot noise PLot 2.9 0.0
Beeper 9 Default industrial noise Point 2.7 0.0
Beeper 8 Default industrial noise Point 2.7 0.0
Parking 29 Default parking lot noise PLot 2.5 0.0
Beeper 10 Default industrial noise Point 2.4 0.0
Parking 28 Default parking lot noise PLot 2.4 0.0
Parking 27 Default parking lot noise PLot 2.3 0.0
Parking 23 Default parking lot noise PLot 2.2 0.0
Parking 35 Default parking lot noise PLot 2.0 0.0
Parking 21 Default parking lot noise PLot 1.7 0.0
Parking 26 Default parking lot noise PLot 1.6 0.0
Parking 25 Default parking lot noise PLot 1.6 0.0
Beeper 12 Default industrial noise Point 0.2 0.0
Parking 36 Default parking lot noise PLot -0.2 0.0
Beeper 15 Default industrial noise Point -1.7 0.0
Beeper 16 Default industrial noise Point -1.8 0.0
Beeper 17 Default industrial noise Point -1.9 0.0
Beeper 11 Default industrial noise Point -2.0 0.0
Beeper 14 Default industrial noise Point -2.9 0.0
Beeper 13 Default industrial noise Point -2.9 0.0
Parking 31 Default parking lot noise PLot -3.5 0.0
Beeper 18 Default industrial noise Point -6.6 0.0
Beeper 19 Default industrial noise Point -6.8 0.0
Beeper 20 Default industrial noise Point -13.1 0.0
Beeper 21 Default industrial noise Point -13.5 0.0
Receiver R2 Fl G Lr,lim dB(A) Leq,n 57.6 dB(A)
Loading 4 Default industrial noise Point 54.8 0.0
Loading 3 Default industrial noise Point 54.1 0.0
HVAC Default industrial noise Point 36.9 0.0
Beeper 19 Default industrial noise Point 34.2 0.0
Beeper 18 Default industrial noise Point 33.9 0.0
Beeper 17 Default industrial noise Point 32.3 0.0
Beeper 16 Default industrial noise Point 31.7 0.0
HVAC Default industrial noise Point 31.1 0.0
Beeper 15 Default industrial noise Point 31.0 0.0
Parking 37 Default parking lot noise PLot 29.1 0.0
Parking 24 Default parking lot noise PLot 25.0 0.0
Loading 2 Default industrial noise Point 23.5 0.0
HVAC Default industrial noise Point 22.0 0.0
HVAC Default industrial noise Point 21.7 0.0
Loading 1 Default industrial noise Point 21.6 0.0
Parking 36 Default parking lot noise PLot 20.6 0.0
HVAC Default industrial noise Point 18.4 0.0
Beeper 13 Default industrial noise Point 17.3 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 2
Nirvana Chula Vista Self Storage Noise
Contribution level - 001 - Warehouse Night: Outdoor SP
9
Source Source group Source typeTr. lane Leq,n
dB(A)
A
dB
HVAC Default industrial noise Point 15.9 0.0
HVAC Default industrial noise Point 14.9 0.0
Parking 10 Default parking lot noise PLot 14.6 0.0
Parking 9 Default parking lot noise PLot 14.1 0.0
Parking 18 Default parking lot noise PLot 13.8 0.0
Parking 1 Default parking lot noise PLot 13.7 0.0
Parking 19 Default parking lot noise PLot 13.7 0.0
Parking 11 Default parking lot noise PLot 13.7 0.0
HVAC Default industrial noise Point 13.4 0.0
Parking 8 Default parking lot noise PLot 12.7 0.0
Parking 7 Default parking lot noise PLot 12.4 0.0
Parking 17 Default parking lot noise PLot 12.1 0.0
Parking 6 Default parking lot noise PLot 11.7 0.0
Parking 15 Default parking lot noise PLot 11.5 0.0
Parking 16 Default parking lot noise PLot 11.0 0.0
Parking 25 Default parking lot noise PLot 10.9 0.0
Parking 14 Default parking lot noise PLot 10.2 0.0
Parking 20 Default parking lot noise PLot 10.2 0.0
Parking 32 Default parking lot noise PLot 9.7 0.0
Parking 33 Default parking lot noise PLot 9.7 0.0
Parking 27 Default parking lot noise PLot 9.1 0.0
Parking 4 Default parking lot noise PLot 8.9 0.0
Parking 28 Default parking lot noise PLot 8.9 0.0
Parking 5 Default parking lot noise PLot 8.8 0.0
Parking 22 Default parking lot noise PLot 8.5 0.0
Parking 12 Default parking lot noise PLot 8.4 0.0
Parking 34 Default parking lot noise PLot 8.2 0.0
Parking 26 Default parking lot noise PLot 8.2 0.0
Parking 29 Default parking lot noise PLot 8.2 0.0
Beeper 9 Default industrial noise Point 7.7 0.0
Beeper 8 Default industrial noise Point 7.6 0.0
Beeper 14 Default industrial noise Point 7.5 0.0
Parking 30 Default parking lot noise PLot 7.4 0.0
Beeper 20 Default industrial noise Point 7.3 0.0
Parking 13 Default parking lot noise PLot 7.2 0.0
Beeper 7 Default industrial noise Point 6.6 0.0
Parking 21 Default parking lot noise PLot 6.1 0.0
Parking 23 Default parking lot noise PLot 5.4 0.0
Beeper 21 Default industrial noise Point 5.3 0.0
Parking 35 Default parking lot noise PLot 5.2 0.0
Beeper 5 Default industrial noise Point 4.7 0.0
Beeper 12 Default industrial noise Point 4.5 0.0
Beeper 10 Default industrial noise Point 4.5 0.0
Beeper 4 Default industrial noise Point 4.4 0.0
Beeper 3 Default industrial noise Point 4.1 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 3
Nirvana Chula Vista Self Storage Noise
Contribution level - 001 - Warehouse Night: Outdoor SP
9
Source Source group Source typeTr. lane Leq,n
dB(A)
A
dB
Beeper 2 Default industrial noise Point 3.7 0.0
Parking 31 Default parking lot noise PLot 3.6 0.0
Beeper 1 Default industrial noise Point 3.5 0.0
Beeper 6 Default industrial noise Point 3.0 0.0
Beeper 11 Default industrial noise Point 2.6 0.0
Parking 3 Default parking lot noise PLot -3.2 0.0
Parking 2 Default parking lot noise PLot -3.6 0.0
Receiver R3 Fl G Lr,lim dB(A) Leq,n 46.3 dB(A)
Parking 12 Default parking lot noise PLot 41.3 0.0
Parking 23 Default parking lot noise PLot 40.8 0.0
Parking 11 Default parking lot noise PLot 36.7 0.0
Parking 21 Default parking lot noise PLot 32.9 0.0
Parking 20 Default parking lot noise PLot 31.3 0.0
HVAC Default industrial noise Point 31.2 0.0
Beeper 11 Default industrial noise Point 30.6 0.0
Beeper 12 Default industrial noise Point 30.6 0.0
Parking 10 Default parking lot noise PLot 29.7 0.0
Parking 19 Default parking lot noise PLot 28.8 0.0
Parking 25 Default parking lot noise PLot 26.4 0.0
Parking 9 Default parking lot noise PLot 25.9 0.0
Parking 18 Default parking lot noise PLot 24.4 0.0
Parking 27 Default parking lot noise PLot 24.0 0.0
Parking 26 Default parking lot noise PLot 23.9 0.0
Parking 32 Default parking lot noise PLot 23.8 0.0
HVAC Default industrial noise Point 23.4 0.0
Parking 8 Default parking lot noise PLot 22.4 0.0
HVAC Default industrial noise Point 22.0 0.0
Parking 28 Default parking lot noise PLot 21.1 0.0
HVAC Default industrial noise Point 21.0 0.0
Parking 17 Default parking lot noise PLot 21.0 0.0
Parking 34 Default parking lot noise PLot 20.4 0.0
Parking 30 Default parking lot noise PLot 20.2 0.0
Parking 29 Default parking lot noise PLot 20.1 0.0
Parking 33 Default parking lot noise PLot 20.0 0.0
Parking 7 Default parking lot noise PLot 19.8 0.0
HVAC Default industrial noise Point 19.6 0.0
Parking 31 Default parking lot noise PLot 18.4 0.0
Parking 35 Default parking lot noise PLot 17.7 0.0
Parking 16 Default parking lot noise PLot 17.7 0.0
Parking 6 Default parking lot noise PLot 17.5 0.0
Parking 15 Default parking lot noise PLot 16.9 0.0
HVAC Default industrial noise Point 16.3 0.0
Beeper 13 Default industrial noise Point 15.6 0.0
Beeper 14 Default industrial noise Point 14.7 0.0
Parking 1 Default parking lot noise PLot 14.7 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 4
Nirvana Chula Vista Self Storage Noise
Contribution level - 001 - Warehouse Night: Outdoor SP
9
Source Source group Source typeTr. lane Leq,n
dB(A)
A
dB
Parking 14 Default parking lot noise PLot 14.7 0.0
Parking 5 Default parking lot noise PLot 14.5 0.0
Loading 1 Default industrial noise Point 14.1 0.0
Parking 24 Default parking lot noise PLot 13.4 0.0
Loading 4 Default industrial noise Point 13.4 0.0
Loading 2 Default industrial noise Point 13.1 0.0
Parking 4 Default parking lot noise PLot 12.3 0.0
Parking 22 Default parking lot noise PLot 11.1 0.0
Loading 3 Default industrial noise Point 11.1 0.0
Parking 13 Default parking lot noise PLot 10.1 0.0
HVAC Default industrial noise Point 9.0 0.0
HVAC Default industrial noise Point 8.4 0.0
Beeper 8 Default industrial noise Point 6.6 0.0
Beeper 7 Default industrial noise Point 6.5 0.0
Parking 37 Default parking lot noise PLot 4.4 0.0
Parking 36 Default parking lot noise PLot 4.0 0.0
Beeper 5 Default industrial noise Point 3.9 0.0
Beeper 4 Default industrial noise Point 3.7 0.0
Beeper 3 Default industrial noise Point 3.4 0.0
Beeper 9 Default industrial noise Point 3.2 0.0
Beeper 2 Default industrial noise Point 3.0 0.0
Beeper 10 Default industrial noise Point 2.7 0.0
Beeper 6 Default industrial noise Point 2.6 0.0
Beeper 1 Default industrial noise Point -0.7 0.0
Parking 3 Default parking lot noise PLot -0.8 0.0
Beeper 15 Default industrial noise Point -3.4 0.0
Parking 2 Default parking lot noise PLot -3.4 0.0
Beeper 16 Default industrial noise Point -3.7 0.0
Beeper 17 Default industrial noise Point -3.9 0.0
Beeper 18 Default industrial noise Point -4.3 0.0
Beeper 19 Default industrial noise Point -4.4 0.0
Beeper 20 Default industrial noise Point -7.7 0.0
Beeper 21 Default industrial noise Point -7.9 0.0
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 5
Nirvana Chula Vista Self Storage Noise
Octave spectra of the sources in dB(A) - 001 - Warehouse Night: 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)
Beeper 1 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
Beeper 2 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
Beeper 3 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
Beeper 4 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
Beeper 5 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
Beeper 6 Point 80.2 80.2 0.0 0.0 0 Back up Alarm Beeper 61.1 63.0 63.6 70.3 70.3 78.4 68.3 59.9 41.3
Beeper 7 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
Beeper 8 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
Beeper 9 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
Beeper 10 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
Beeper 11 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
Beeper 12 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
Beeper 13 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
Beeper 14 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
Beeper 15 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
Beeper 16 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
Beeper 17 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
Beeper 18 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
Beeper 19 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
Beeper 20 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
Beeper 21 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 Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
HVAC Point 82.9 82.9 0.0 0.0 0 100%/24h Carrier 7.5 ton rooftop unit 61.1 65.5 71.1 77.4 79.0 74.7 70.2 65.0
Loading 1 Point 93.0 93.0 0.0 0.0 0 100%/24h Idiling Semi-Truck 46.1 57.4 80.5 76.7 83.7 89.3 87.1 83.1 76.1
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 1
Nirvana Chula Vista Self Storage Noise
Octave spectra of the sources in dB(A) - 001 - Warehouse Night: 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)
Loading 2 Point 93.0 93.0 0.0 0.0 0 100%/24h Idiling Semi-Truck 46.1 57.4 80.5 76.7 83.7 89.3 87.1 83.1 76.1
Loading 3 Point 93.0 93.0 0.0 0.0 0 100%/24h Idiling Semi-Truck 46.1 57.4 80.5 76.7 83.7 89.3 87.1 83.1 76.1
Loading 4 Point 93.0 93.0 0.0 0.0 0 100%/24h Idiling Semi-Truck 46.1 57.4 80.5 76.7 83.7 89.3 87.1 83.1 76.1
Parking 1 PLot 616.30 57.7 85.6 0.0 0.0 0 Convenience Store Typical spectrum 69.0 80.6 73.1 77.6 77.7 78.1 75.4 69.2 56.4
Parking 2 PLot 94.50 56.3 76.0 0.0 0.0 0 Convenience Store Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 3 PLot 104.63 55.8 76.0 0.0 0.0 0 Convenience Store Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 4 PLot 121.31 56.2 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 5 PLot 134.29 55.7 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 6 PLot 123.46 56.1 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 7 PLot 113.88 56.4 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 8 PLot 138.83 55.6 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 9 PLot 131.93 55.8 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 10 PLot 117.79 56.3 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 11 PLot 132.97 55.8 77.0 0.0 0.0 0 Convenience Store Typical spectrum 60.3 71.9 64.4 68.9 69.0 69.4 66.7 60.5 47.7
Parking 12 PLot 89.39 55.3 74.8 0.0 0.0 0 Convenience Store Typical spectrum 58.1 69.7 62.2 66.7 66.8 67.2 64.5 58.3 45.5
Parking 13 PLot 130.38 54.9 76.0 0.0 0.0 0 Convenience Store Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 14 PLot 113.01 55.5 76.0 0.0 0.0 0 Convenience Store Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 15 PLot 134.55 55.3 76.5 0.0 0.0 0 Convenience Store Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
Parking 16 PLot 93.71 55.7 75.5 0.0 0.0 0 Convenience Store Typical spectrum 58.8 70.4 62.9 67.4 67.5 67.9 65.2 59.0 46.2
Parking 17 PLot 117.58 54.7 75.5 0.0 0.0 0 Convenience Store Typical spectrum 58.8 70.4 62.9 67.4 67.5 67.9 65.2 59.0 46.2
Parking 18 PLot 141.98 55.0 76.5 0.0 0.0 0 Convenience Store Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
Parking 19 PLot 75.79 57.2 76.0 0.0 0.0 0 Convenience Store Typical spectrum 59.4 71.0 63.5 68.0 68.1 68.5 65.8 59.6 46.8
Parking 20 PLot 66.34 56.6 74.8 0.0 0.0 0 Convenience Store Typical spectrum 58.1 69.7 62.2 66.7 66.8 67.2 64.5 58.3 45.5
Parking 21 PLot 80.30 54.9 74.0 0.0 0.0 0 Convenience Store Typical spectrum 57.3 68.9 61.4 65.9 66.0 66.4 63.7 57.5 44.7
Parking 22 PLot 45.12 55.2 71.8 0.0 0.0 0 Convenience Store Typical spectrum 55.1 66.7 59.2 63.7 63.8 64.2 61.5 55.3 42.5
Parking 23 PLot 102.97 54.7 74.8 0.0 0.0 0 Convenience Store Typical spectrum 58.1 69.7 62.2 66.7 66.8 67.2 64.5 58.3 45.5
Parking 24 PLot 90.58 54.4 74.0 0.0 0.0 0 Convenience Store Typical spectrum 57.3 68.9 61.4 65.9 66.0 66.4 63.7 57.5 44.7
Parking 25 PLot 136.91 55.2 76.5 0.0 0.0 0 Convenience Store Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
Parking 26 PLot 153.82 54.7 76.5 0.0 0.0 0 Convenience Store Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
Parking 27 PLot 130.52 55.4 76.5 0.0 0.0 0 Convenience Store Typical spectrum 59.9 71.5 64.0 68.5 68.6 69.0 66.3 60.1 47.3
SoundPLAN 8.2
MD Acoustics 1197 E Los Angeles Ave,Unit C 256 Simi Valley, CA 93065 USA 2
Appendix C:
Construction Input
Activity
Leq at 250 feet
dBA
LMax at 250 feet
dBA
Grading 73 71
Building Construction 70 72
Paving 69 73
Equipment Summary
Reference (dBA)
50 ft Lmax
Rock Drills 96
Jack Hammers 82
Pneumatic Tools 85
Pavers 80
Dozers 85
Scrapers 87
Haul Trucks 88
Cranes 82
Portable Generators 80
Rollers 80
Tractors 80
Front-End Loaders 86
Hydraulic Excavators 86
Graders 86
Air Compressors 86
Trucks 86
Grading
Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements
Lmax Leq
1 Grader 86 1 40 250 0.5 0 68.5 64.5 2848623.03
2 Dozer 85 1 40 250 0.5 0 67.5 63.5 2262741.7
3 Excavator 86 2 40 250 0.5 0 71.5 67.6 5697246.05
4 Tractor/Backhoe 80 2 40 250 0.5 0 65.5 61.6 1431083.51
5 Scrapers 87 2 40 250 0.5 0 72.5 68.6 7172407.83
Source: MD Acoustics, August 2021.Lmax*71 Leq 73
1- Percentage of time that a piece of equipment is operating at full power.Lw 107 Lw 105
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 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58
60 18.3 0.5 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56
70 21.3 0.5 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54
80 24.4 0.5 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53
90 27.4 0.5 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
100 30.5 0.5 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
110 33.5 0.5 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
120 36.6 0.5 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
130 39.6 0.5 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
140 42.7 0.5 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47
150 45.7 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
160 48.8 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
170 51.8 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
180 54.9 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
190 57.9 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
200 61.0 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
210 64.0 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
220 67.1 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
230 70.1 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
240 73.1 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
250 76.2 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
260 79.2 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
270 82.3 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
280 85.3 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
290 88.4 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
300 91.4 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
310 94.5 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
320 97.5 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
330 100.6 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
340 103.6 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
350 106.7 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
360 109.7 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
370 112.8 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
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 Cranes 82 2 40 250 0.5 0 67.5 63.6 2268114.51
2 Forklift/Tractor 80 5 40 250 0.5 0 69.5 65.5 3577708.76
3 Generator 80 2 40 250 0.5 0 65.5 61.6 1431083.51
4 Tractor/Backhoe 80 5 40 250 0.5 0 69.5 65.5 3577708.76
Source: MD Acoustics, August 2021.Lmax*72 Leq 70
1- Percentage of time that a piece of equipment is operating at full power.Lw 103 Lw 102
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 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
80 24.4 0.5 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
90 27.4 0.5 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
100 30.5 0.5 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48
110 33.5 0.5 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47
120 36.6 0.5 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46
130 39.6 0.5 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45
140 42.7 0.5 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
150 45.7 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
160 48.8 0.5 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
170 51.8 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
180 54.9 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
190 57.9 0.5 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
200 61.0 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
210 64.0 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
220 67.1 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
230 70.1 0.5 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
240 73.1 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
250 76.2 0.5 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
260 79.2 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
270 82.3 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
280 85.3 0.5 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
290 88.4 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
300 91.4 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
310 94.5 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
320 97.5 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
330 100.6 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
340 103.6 0.5 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
350 106.7 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
360 109.7 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
370 112.8 0.5 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
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 40 250 0.5 0 71.5 67.6 5697246.05
2 Rollers 80 2 40 250 0.5 0 65.5 61.6 1431083.51
3 Paving Equipment 80 2 40 250 0.5 0 65.5 61.6 1431083.51
Source: MD Acoustics, August 2021.Lmax*73 Leq 69
1- Percentage of time that a piece of equipment is operating at full power.Lw 104 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 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54
60 18.3 0.5 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
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 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
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 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
150 45.7 0.5 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42
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 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
180 54.9 0.5 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
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 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39
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 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38
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 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
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 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
270 82.3 0.5 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36
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 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
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 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
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 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
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
Ground
Effect
Shielding
(dBA)
Calculated (dBA)
EnergyNo.Equipment Description
Reference (dBA)
50 ft Lmax Quantity
Usage
Factor1
Distance to
Receptor
(ft)
Project: Chula Vista Self Storage Date:8/10/21
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 =24.00 Distance from Equipment to Receiver (ft)
n = 1.10 Vibration attenuation rate through the ground
PPV =0.093 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 D:
Traffic Noise Calculations
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Nirvana Self Storage JOB #:0623-2021-04
ROADWAY:Nirvana to Heritage Rd DATE:1-Aug-23
LOCATION:Existing ENGINEER:R.Pearson
ADT =14,260 RECEIVER DISTANCE = 50
SPEED =50 DIST C/L TO WALL =0
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =50
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,426 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 15 HTH WALL=0.0
MEDIUM TRUCKS =15 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =15 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 68.9 67.0 65.3 59.2 67.8 68.4
MEDIUM TRUCKS 59.4 57.9 51.5 50.0 58.4 58.7
HEAVY TRUCKS 59.6 58.2 49.2 50.4 58.8 58.9
NOISE LEVELS (dBA)69.8 68.0 65.5 60.2 68.8 69.3
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 68.9 67.0 65.3 59.2 67.8 68.4
MEDIUM TRUCKS 59.4 57.9 51.5 50.0 58.4 58.7
HEAVY TRUCKS 59.6 58.2 49.2 50.4 58.8 58.9
NOISE LEVELS (dBA)69.8 68.0 65.5 60.2 68.8 69.3
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 45 97 208 449
LDN 41 89 192 414
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
ROADWAY CONDITIONS RECEIVER INPUT DATA
SITE CONDITIONS WALL INFORMATION
FHWA-RD-77-108 HIGHWAY NOISE PREDICTION MODEL
PROJECT:Nirvana Self Storage JOB #:0623-2021-04
ROADWAY:Nirvana to Heritage Rd DATE:1-Aug-23
LOCATION:E+P ENGINEER:R.Pearson
ADT =15,809 RECEIVER DISTANCE = 50
SPEED =50 DIST C/L TO WALL =0
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =50
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,581 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 15 HTH WALL=0.0
MEDIUM TRUCKS =15 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =15 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 69.4 67.5 65.7 59.7 68.3 68.9
MEDIUM TRUCKS 59.8 58.3 52.0 50.4 58.9 59.1
HEAVY TRUCKS 60.1 58.7 49.6 50.9 59.2 59.4
NOISE LEVELS (dBA)70.3 68.5 66.0 60.6 69.2 69.7
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 69.4 67.5 65.7 59.7 68.3 68.9
MEDIUM TRUCKS 59.8 58.3 52.0 50.4 58.9 59.1
HEAVY TRUCKS 60.1 58.7 49.6 50.9 59.2 59.4
NOISE LEVELS (dBA)70.3 68.5 66.0 60.6 69.2 69.7
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 48 104 223 481
LDN 44 95 206 443
VEHICLE MIX DATA MISC. VEHICLE INFO
NOISE INPUT DATA
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:Nirvana Self Storage JOB #:0623-2021-04
ROADWAY:Nirvana to Heritage Rd DATE:1-Aug-23
LOCATION:E+P+Cumulative ENGINEER:R.Pearson
ADT =18,117 RECEIVER DISTANCE = 50
SPEED =50 DIST C/L TO WALL =0
PK HR % =10 RECEIVER HEIGHT =5.0
NEAR LANE/FAR LANE DIST =0 WALL DISTANCE FROM RECEIVER =50
ROAD ELEVATION =0.0 PAD ELEVATION =0.5
GRADE =1.0 %ROADWAY VIEW:LF ANGLE=-90
PK HR VOL =1,812 RT ANGLE=90
DF ANGLE=180
AUTOMOBILES = 15 HTH WALL=0.0
MEDIUM TRUCKS =15 (10 = HARD SITE, 15 = SOFT SITE)AMBIENT=0.0
HEAVY TRUCKS =15 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 70.0 68.1 66.3 60.3 68.9 69.5
MEDIUM TRUCKS 60.4 58.9 52.6 51.0 59.5 59.7
HEAVY TRUCKS 60.7 59.3 50.2 51.5 59.8 60.0
NOISE LEVELS (dBA)70.9 69.1 66.6 61.2 69.8 70.3
VEHICLE TYPE PK HR LEQ DAY LEQ EVEN LEQ NIGHT LEQ LDN CNEL
AUTOMOBILES 70.0 68.1 66.3 60.3 68.9 69.5
MEDIUM TRUCKS 60.4 58.9 52.6 51.0 59.5 59.7
HEAVY TRUCKS 60.7 59.3 50.2 51.5 59.8 60.0
NOISE LEVELS (dBA)70.9 69.1 66.6 61.2 69.8 70.3
NOISE LEVELS 70 dBA 65 dBA 60 dBA 55 dBA
CNEL 53 113 244 526
LDN 49 105 225 485
VEHICLE MIX DATA MISC. VEHICLE INFO
NOISE INPUT DATA
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)
Appendix E:
Cumulative Project Analysis
Nirvana Cumulative Project List
1. Project Site – 821 Main Street – Nirvana Business Park – located 5,000 feet to
the east – Design Review – 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.
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. 517 Shinohara – Shinohara Business Center – 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.
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.