HomeMy WebLinkAboutSDP 2023-0014; CARLSBAD VILLAGE MIXED-USE - SB 330; NOISE STUDY - DECEMBER 2023; 2023-12-01
Noise Technical Report
Carlsbad Village Drive
Mixed Use Project
DECEMBER 2023
Prepared for:
GRT Carlsbad Village, LLC
c/o Tooley Interests, LLC
2001 Wilshire Blvd Suite 420
Santa Monica, CA 90403
Prepared by:
605 Third Street
Encinitas, California 92024
Contact: Mark Storm, INCE Bd. Cert.
Printed on 30% post-consumer recycled material.
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
14814 i DECEMBER 2023
Table of Contents
SECTION PAGE NO.
Acronyms and Abbreviations ............................................................................................................................................ iii
1 Introduction .......................................................................................................................................................... 1
1.1 Report Purpose and Scope .................................................................................................................... 1
1.2 Regional and Local Setting .................................................................................................................... 1
1.3 Project Description ................................................................................................................................. 1
1.4 Fundamentals of Noise and Vibration ................................................................................................... 1
1.4.1 Sound, Noise, and Acoustics .................................................................................................... 1
1.4.2 Sound Pressure Levels and Decibels ...................................................................................... 2
1.4.3 A-Weighted Sound Level ........................................................................................................... 7
1.4.4 Human Response to Changes in Noise Levels ....................................................................... 8
1.4.5 Noise Descriptors...................................................................................................................... 8
1.4.6 Sound Propagation ................................................................................................................... 8
2 Regulatory Setting ............................................................................................................................................. 10
2.1 Federal ................................................................................................................................................. 10
2.2 State ..................................................................................................................................................... 10
2.3 Local ..................................................................................................................................................... 10
2.3.1 Noise Ordinance .................................................................................................................... 10
2.3.2 General Plan Noise Element ................................................................................................. 10
3 Existing Conditions ............................................................................................................................................ 12
4 Thresholds of Significance ............................................................................................................................... 15
5 Impact Discussion ............................................................................................................................................. 16
5.1 Project Impact Assessment ................................................................................................................ 16
5.2 Cumulative Impact Assessment ......................................................................................................... 20
6 Summary of Findings ........................................................................................................................................ 24
7 References Cited ............................................................................................................................................... 26
TABLES
Table 1. Typical Sound Levels in the Environment and Industry .................................................................................... 7
Table 2. Performance Standards for Non-Transportation Sources ............................................................................. 11
Table 3. Measured Baseline Outdoor Ambient Noise Levels ....................................................................................... 12
Table 4. Typical Construction Equipment Maximum Noise Levels .............................................................................. 16
Table 5. Estimated Distances between Construction Activities and the Nearest Noise-sensitive Receptors .......... 17
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Table 6. Predicted Construction Noise at Indicated Receptors per Activity Phase .................................................... 18
Table 7. Predicted Project Rooftop HVAC Noise Levels ................................................................................................ 19
FIGURES
Figure 1 Project Location ...................................................................................................................................... 3
Figure 2 Site Plan .................................................................................................................................................. 5
Figure 3 Noise Measurement Locations ........................................................................................................... 13
APPENDICES
A Baseline Noise Measurement Field Data
B Construction Noise Modeling Input and Output
C Traffic Noise Modeling Input and Output
D Project HVAC Noise Prediction
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
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Acronyms and Abbreviations
Acronym/Abbreviation Definition
Caltrans California Department of Transportation
CEQA California Environmental Quality Act
City City of Carlsbad
CNEL Community Noise Equivalent Level
dB decibel
dBA A-weighted decibel
FTA Federal Transit Administration
Ldn day–night average noise level
Leq equivalent noise level
Lmax maximum sound level
Lmin minimum sound level
Carlsbad Village Mixed Use proposed project
RCNM Roadway Construction Noise Model
SF square feet
SLM sound level meter
SPL sound pressure level
ST short-term
VLI very low income
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1 Introduction
1.1 Report Purpose and Scope
This technical noise report evaluates the potential noise impacts during construction and operation of the
proposed Carlsbad Village Drive Mixed Use project (proposed project). This assessment utilizes the significance
thresholds in Appendix G of the California Environmental Quality Act Guidelines (14 CCR 15000 et seq.) adopted
January 2019.
1.2 Regional and Local Setting
The project site is located in the City of Carlsbad (City), south of Carlsbad Village Drive and west of Interstate 5 (San
Diego Freeway). The project site is bound by Carlsbad Village Drive to the north, Interstate 5 (San Diego Freeway)
to the east, commercial residential development to the west, and Oak Avenue to the south (Figure 1, Project
Location). The land is currently occupied by approximately 58,750 square feet (SF) of commercial businesses. The
Project site includes Assessor’s Parcel Numbers designated as Village (V) in the City’s General Plan and zoned
Village-Barrio (V-B) (APNs 203-320-53-00, 203-320-55-00, and 203-320-56-00).
1.3 Project Description
The Project proposes to develop a mixed-use development consisting of 218 multi-family units, as well as 13,800
square feet of commercial space, including parking and open space. The proposed commercial uses would be
contained in two, one-story buildings along Carlsbad Village Drive, and the residential units would be provided in
two five-story buildings. 340 vehicular parking spaces will be provided at grade surround the commercial and
residential buildings and within an above-grade parking structure. The existing Project site is fully paved and
developed with commercial buildings that would be demolished during Project construction.
1.4 Fundamentals of Noise
The following is a brief discussion of fundamental noise concepts and terminology.
1.4.1 Sound, Noise, and Acoustics
Sound is actually a process that consists of three components: the sound source, sound path, and sound receiver.
All three components must be present for sound to exist. Without a source to produce sound, there is no sound.
Similarly, without a medium to transmit sound pressure waves, there is no sound. Finally, sound must be received;
a hearing organ, sensor, or object must be present to perceive, register, or be affected by sound or noise. In most
situations, there are many different sound sources, paths, and receptors rather than just one of each. Acoustics is
the field of science that deals with the production, propagation, reception, effects, and control of sound. Noise is
defined as sound that is loud, unpleasant, unexpected, or undesired.
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
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1.4.2 Sound Pressure Levels and Decibels
The amplitude of a sound determines its loudness. Loudness of sound increases with increasing amplitude. Sound
pressure amplitude is measured in units of micronewton per square meter, also called micropascal. One micropascal
is approximately one-hundred billionth (0.00000000001) of normal atmospheric pressure. The pressure of a very
loud sound may be 200 million micropascals, or 10 million times the pressure of the weakest audible sound. Because
expressing sound levels in terms of micropascal would be very cumbersome, sound pressure level in logarithmic units
is used instead to describe the ratio of actual sound pressure to a reference pressure squared. These units are called
Bels. To provide a finer resolution, a Bel is subdivided into 10 decibels (dB).
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Project Location
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SOURCE:Tooley 2023
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE 2
Project Site Plan
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1.4.3 A-Weighted Sound Level
Sound pressure level alone is not a reliable indicator of loudness. The frequency, or pitch, of a sound also has a
substantial effect on how humans will respond. Although the intensity (energy per unit area) of the sound is a purely
physical quantity, the loudness, or human response, is determined by the characteristics of the human ear.
Human hearing is limited not only in the range of audible frequencies, but also in the way it perceives the sound in
that range. In general, the healthy human ear is most sensitive to sounds between 1,000 and 5,000 hertz, and it
perceives a sound within that range as more intense than a sound of higher or lower frequency with the same
magnitude. To approximate the frequency response of the human ear, a series of sound level adjustments is usually
applied to the sound measured by a sound level meter. The adjustments (referred to as a weighting network) are
frequency dependent.
The A-scale weighting network approximates the frequency response of the average healthy young ear when
listening to ordinary sounds. When people make judgments about the relative loudness or annoyance of a sound,
their judgments correlate well with the A-scale sound levels of those sounds. Other weighting networks have been
devised to address high noise levels or other special situations (e.g., B-scale, C-scale, D-scale), but these scales are
rarely used in conjunction with most environmental noise. Noise levels are typically reported in terms of A-weighted
sound levels. All sound levels discussed in this report are A-weighted decibels (dBA). Examples of typical noise levels
for common indoor and outdoor activities are depicted in Table 1.
Table 1. Typical Sound Levels in the Environment and Industry
Common Outdoor Activities Noise Level (dB) Common Indoor Activities
— 110 Rock band
Jet fly over at 300 meters
(1,000 feet)
100 —
Gas lawn mower at 1 meter (3 feet) 90 —
Diesel truck at 15 meters (50 feet),
at 80 kilometers per hour
(50 miles per hour)
80 Food blender at 1 meter (3 feet); garbage
disposal at 1 meter (3 feet)
Noisy urban area, daytime; gas lawn
mower at 30 meters (100 feet)
70 Vacuum cleaner at 3 meters (10 feet)
Commercial area; heavy traffic at
90 meters (300 feet)
60 Normal speech at 1 meter (3 feet)
Quiet urban, daytime 50 Large business office; dishwasher next room
Quiet urban, nighttime 40 Theater; large conference room (background)
Quiet suburban, nighttime 30 Library
Quiet rural, nighttime 20 Bedroom at night; concert hall (background)
— 10 Broadcast/Recording studio
Lowest threshold of human hearing 0 Lowest threshold of human hearing
Source: Caltrans 2013.
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1.4.4 Human Response to Changes in Noise Levels
Under controlled conditions in an acoustics laboratory, the trained, healthy human ear is able to discern changes
in sound levels of 1 dBA when exposed to steady, single-frequency signals in the mid-frequency range. Outside such
controlled conditions, it is widely accepted that the average healthy ear can barely perceive noise level changes of
3 dBA. A change of 5 dBA is readily perceptible, and a change of 10 dBA is perceived as twice (if a gain) or half (if
a loss) as loud. A doubling of sound energy results in a 3-dBA increase in sound, which means that a doubling of
sound energy (e.g., doubling the volume of traffic on a road) would result in a barely perceptible change in sound
level.
1.4.5 Noise Descriptors
Units of measure and standardized descriptors have been developed to quantify and evaluate characteristics of
sound. For instance, the energy-equivalent sound level (Leq) is the equivalent steady-state or constant sound level
that in a stated period of time would contain the same acoustical energy as the actual time-varying sound level
during the same time period. For instance, the 1-hour A-weighted equivalent sound level, Leq(h), is the energy average
decibel value of A-weighted sound occurring during a 1-hour period, and represents one of the City’s performance-
based noise level standards.
People are generally more sensitive to and thus potentially more annoyed by noise occurring during the evening
and nighttime hours. Hence, another noise descriptor used in community noise assessments—the community noise
equivalent level (CNEL)—represents a time-weighted, 24-hour average noise level based on the A-weighted sound
level. However, unlike an unmodified 24-hour Leq value, the CNEL descriptor accounts for increased noise sensitivity
during the evening (7 p.m. to 10 p.m.) and nighttime (10 p.m. to 7 a.m.) by adding 5 dBA and 10 dBA, respectively,
to the average sound levels occurring during these defined hours within a 24-hour period.
1.4.6 Sound Propagation
Sound propagation (i.e., the traverse of sound from a noise emission source position to a receiver location) is
influenced by multiple factors that include geometric spreading, ground absorption, atmospheric effects, and
occlusion by natural terrain and/or features of the built environment.
Sound levels attenuate (or diminish) geometrically at a rate of approximately 6 dBA per doubling of distance from
an outdoor point-type source due to the spherical spreading of sound energy with increasing distance travelled. The
effects of atmospheric conditions such as humidity, temperature, and wind gradients are typically distance-
dependent and can also temporarily either increase or decrease sound levels measured or perceived at a receptor
location. In general, the greater the distance the receiver is from the source of sound emission, the greater the
potential for variation in sound levels at the receptor due to these atmospheric effects. Additional attenuation can
result from sound path occlusion and diffraction due to intervention of natural (ridgelines, dense forests, etc.) and
built features (such as solid walls, buildings and other structures).
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2 Regulatory Setting
2.1 Federal
In its Transit Noise and Vibration Impact Assessment guidance manual, the Federal Transit Administration (FTA)
recommends a daytime construction noise level threshold of 80 dBA Leq over an 8-hour period (FTA 2018) when
detailed construction noise assessments are performed to evaluate potential impacts to community residences
surrounding a project. Although this FTA guidance is not a regulation, it can serve as a quantified standard in the
absence of such noise limits at the state and local jurisdictional levels.
2.2 State
In its assessment of applicant-proposed energy projects under its jurisdiction, and with respect to impact
significance for durable increases in outdoor ambient sound level per CEQA, California Energy Commission (CEC)
technical staff has often concluded that it is “reasonable to assume that an increase in background noise levels up
to 5 dBA in a residential setting is insignificant; an increase of more than 10 dBA is considered significant. An
increase between 5 and 10 dBA should be considered adverse, but may be either significant or insignificant,
depending on the particular circumstances of the case” (CEC 2010). In this context, the CEC defines “background”
sound with an L90 statistical sound level descriptor, which is the sound level exceeded for a cumulative ninety
percent (90%) of the time during a measurement period.
Regarding noise from construction activities, the CEC usually considers a project’s impact less than significant with
respect to CEQA compliance if it is temporary, limited to daytime hours, and industry-standard noise abatement
measures are implemented for noise producing equipment.
2.3 Local
2.3.1 Noise Ordinance
The City’s noise control ordinance (Municipal Code, Chapter 8.48) outlines regulations for limitation of hours for
construction (i.e., the erection, demolition, alteration, or repair of any building or structure or the grading or
excavation of land) that creates disturbing, excessive, or offensive noise. Construction can occur Monday through
Friday from 7 a.m. to 6 p.m., and Saturday 8 a.m. to 6 p.m.; no work can be conducted on Sundays or on federal
holidays. Carlsbad Municipal Code Chapter 8.48 also outlines exceptions that may be granted by the City for
circumstances such as emergency repairs required to protect the health and safety of the community.
2.3.2 General Plan Noise Element
The Noise Element of the City’s General Plan (City of Carlsbad 2015a) includes performance standards for noise
that are applicable to the proposed project. Table 2 (reproduced from City of Carlsbad 2015, Table 5-3) provides
City standards for noise from non-transportation noise sources, including on-site stationary equipment and
machinery such as heating, ventilation, and air conditioning (HVAC) equipment. These standards apply to the noise
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
14814 11 DECEMBER 2023
sources themselves, as measured at the edge of the property line; noise caused by motor vehicles traveling to and
from the site is exempt from this standard.
Table 2. Performance Standards for Non-Transportation Sources
Noise Level Descriptor Daytime (7 A.M. to 10 P.M.) Nighttime (10 P.M. to 7 A.M.)
Hourly Leq, dB 55 45
Maximum Level, dB 75 65
Source: City of Carlsbad 2015, Table 5-3.
Note: Each of the noise levels specified above shall be lowered by 5 dB for simple tone noises, noises consisting primarily of speech
or music, or for recurring impulsive noises.
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3 Existing Conditions
Sound pressure level (SPL) measurements were conducted near the project site on October 19, 2022, to quantify
and characterize the existing outdoor ambient noise levels. Table 3 provides the location and time at which these
baseline noise level measurements were taken. The SPL measurements were performed by an attending Dudek
field investigator using a Rion NL-52 sound level meter (SLM) equipped with a 0.5-inch, pre-polarized condenser
microphone with pre-amplifier. This SLM meets the current American National Standards Institute (ANSI) standard
for a Type 1 (Precision Grade) instrument. The accuracy of the SLM was verified using a reference sound signal (i.e.,
field calibrator) before and after the measurements, and the measurements were conducted with the microphone
positioned approximately 5 feet above the ground.
Four (4) short-term noise level measurement locations (ST1–ST4) are depicted on Figure 3, Noise Measurement
and Modeling Locations. Two of these SPL survey positions, ST1 and ST3, represent existing offsite noise-sensitive
receptors (NSR): 985 Oak Avenue (single-family home) and 965 Oak Avenue (Windsor Pointe Apartments); and The
Lofts (multi-family residences). The Leq and Lmax noise levels are provided in Table 3, along with noted perceived
sound sources that included traffic from adjacent roadways and the Interstate-5 (I-5) freeway, and birdsong. As
shown in Table 3, the measured sound levels ranged from approximately 58.4 dBA Leq at ST4 to 67.6 dBA Leq at
ST3. Noise measurement data is also included in Appendix A, Baseline Noise Measurement Field Data.
Given the proximity of the Project site and these measurement survey positions to the I-5 freeway, the dominant
noise source in the outdoor environment, these samples of daytime measured Leq can be interpreted as
approximations of CNEL, since evening SPL would likely be 5 dBA less, and nighttime SPL would be 10 dBA less
than the daytime values according to FTA outdoor ambient noise estimation techniques (FTA 2018).
Table 3. Measured Baseline Outdoor Ambient Noise Levels
Site
Location/Address (and
noise-sensitive receptor)
Perceived/Observed
Sound Sources Date/Time Leq (dBA) Lmax (dBA)
ST1
985 Oak Avenue
(single-family residence)
965 Oak Avenue
(Windsor Pointe [multi-family
residences])
Local roadway traffic, I-5
freeway traffic dominant
2022-10-19,
10:00 AM to
10:15 AM
67.1 70.4
ST2 3044 Harding Street, 3 feet
from edge of pavement
Local roadway traffic,
birds, I-5 freeway traffic
2022-10-19,
11:00 AM to
11:15 AM
62.7 70.4
ST3
1006 Carlsbad Village Drive,
20 feet from edge of
pavement
(multi-family residence)
Local roadway traffic, I-5
freeway traffic, train horn
2022-10-19,
09:30 AM to
09:45 AM
67.6 75.5
ST4 958 Oak Avenue
Local roadway traffic, I-5
freeway noise dominant,
air-conditioning (AC) unit.
2022-10-19,
10:35 AM to
10:50 AM
58.4 60.7
Source: Appendix A.
Notes: Leq = equivalent continuous sound level (time-averaged sound level); Lmax = maximum sound level during the measurement
interval; dBA = A-weighted decibels; ST = short-term noise measurement locations.
0 144 288 432 576 720 864 1008 1152 1296 1440 1584 1728 1872 2016 2160 2304 2448 2592 2736 2880 3024 3168 3312 3456 3600 3744 3888 4032 4176 4320 4464 4608 4752 4896 5040 5184 5328 5472 5616 5760 5904 6048 6192 6336 6480 6624 6768 6912 7056 7200 7344 7488 7632 7776 7920 8064 8208 8352 8496 8640 8784 8928 9072 9216 9360 9504 9648 9792 9936
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141
1
2
142
5
6
144
0
0
145
4
4
146
8
8
148
3
2
149
7
6
151
2
0
152
6
4
154
0
8
155
5
2
156
9
6
158
4
0
159
8
4
161
2
8
162
7
2
164
1
6
165
6
0
167
0
4
168
4
8
169
9
2
171
3
6
172
8
0
174
2
4
175
6
8
177
1
2
178
5
6
180
0
0
181
4
4
182
8
8
184
3
2
185
7
6
187
2
0
188
6
4
190
0
8
191
5
2
192
9
6
194
4
0
195
8
4
197
2
8
198
7
2
200
1
6
201
6
0
203
0
4
204
4
8
205
9
2
207
3
6
208
8
0
210
2
4
211
6
8
213
1
2
214
5
6
216
0
0
217
4
4
218
8
8
220
3
2
221
7
6
223
2
0
224
6
4
226
0
8
227
5
2
228
9
6
230
4
0
231
8
4
233
2
8
234
7
2
236
1
6
237
6
0
239
0
4
240
4
8
241
9
2
243
3
6
244
8
0
246
2
4
247
6
8
249
1
2
250
5
6
252
0
0
253
4
4
254
8
8
256
3
2
257
7
6
259
2
0
260
6
4
262
0
8
263
5
2
264
9
6
266
4
0
267
8
4
269
2
8
270
7
2
272
1
6
273
6
0
275
0
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
SOURCES: Google 2021; Dudek 2022
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE 3
0 81.5 163 Feet Noise Measurement Locations and Nearest Noise-Sensitive Receptors
Project Boundary
985 Oak Avenue
965 Oak Avenue
(Windsor Pointe)
1006 Carlsbad Village
Drive
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4 Thresholds of Significance
The following significance criteria are based on Appendix G of the California Environmental Quality Act Guidelines
(14 CCR 15000 et seq.) and will be used to determine the significance of potential noise impacts. Impacts
associated with noise would be significant if the proposed project would result in:
Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the
project in excess of standards established in the local general plan or noise ordinance, or applicable
standards of other agencies.
Expose people residing or working in the project area to excessive noise levels (for a project located within
the vicinity of a private airstrip or an airport land use plan, or where such a plan has not been adopted,
within 2 miles of a public airport or public use airport).
In light of these above significance criteria, this analysis uses the following standards to evaluate potential noise
impacts.
Construction noise – although neither the City’s Municipal Code or its Noise Guidelines offer a quantitative
decibel limit for construction noise, within allowable construction hours per the City of Carlsbad General
Plan Noise Element (City of Carlsbad 2015), an informational-based threshold is utilized herein to evaluate
a potential construction noise impact at an NSR (i.e., residential land use):
o Relative threshold – up to a 10 dB increase over existing ambient sound level, akin to CEC
assessment of potentially significant impact for long-duration changes to the outdoor sound
environment. Because the Project site is already characterized by existing outdoor ambient levels
ranging from 67 to 68 dBA Leq per samples at ST1 and ST3, respectively, as appearing in Table 3,
this means that construction noise would be considered a significant impact if greater than the
position-dependent existing sound level by more than 10 dB. In other words, based on these
measured outdoor ambient Leq samples at ST1 and ST3 in Table 3, the allowable construction noise
levels would be 77 to 78 dBA hourly Leq values. For context, these construction noise magnitudes
are slightly less than the 80 dBA noise threshold that FTA guidance recommends at the exterior of
a receiving residence.
Offsite traffic noise – the project would generate vehicle trips, thereby having the potential to increase
traffic on local roadways. Such a change attributed to the project resulting in more than a 3 dB increase
would be considered perceptible and thus a significant impact.
Project operations (onsite stationary sources) – 55 dBA hourly Leq during daytime hours and 45 dBA hourly
Leq during nighttime hours. Maximum sound levels (Lmax) are 20 dB higher than these limits.
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
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5 Impact Discussion
5.1 Project Impact Assessment
Potential noise impacts attributed to project construction and operation are studied in the following subsections
that are categorized by the CEQA Guidelines Appendix G significance for noise.
a) Would the project result in generation of a substantial temporary or permanent increase in ambient noise
levels in the vicinity of the project in excess of standards established in the local general plan or noise
ordinance, or applicable standards of other agencies?
Short-Term Construction
Construction noise is a temporary phenomenon, with emission levels varying from hour to hour and day to
day, depending on the equipment in use, the operations performed, and the distance between the source
and receptor. Equipment that would be in use during construction would include, in part, graders, backhoes,
rubber-tired dozers, loaders, cranes, forklifts, pavers, rollers, and air compressors. The typical maximum
noise levels at a distance of 50 feet from various pieces of construction equipment and activities
anticipated for use on the proposed project site are presented in Table 4. Note that the equipment noise
levels presented in Table 4 are maximum noise levels. Usually, construction equipment operates in
alternating cycles of full power and low power, producing average noise levels over time that are less than
the maximum noise level. The average sound level of construction activity also depends on the amount of
time that the equipment operates and the intensity of construction activities during that time.
Table 4. Typical Construction Equipment Maximum Noise Levels
Equipment Type Typical Equipment (Lmax, dBA at 50 Feet)
All Other Equipment > 5 HP 85
Backhoe 78
Compressor (air) 78
Concrete Saw 90
Crane 81
Dozer 82
Excavator 81
Flat Bed Truck 74
Front End Loader 79
Generator 72
Grader 85
Man Lift 75
Paver 77
Roller 80
Scraper 84
Welder / Torch 73
Source: DOT 2006.
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
14814 17 DECEMBER 2023
Note: Lmax = maximum sound level; dBA = A-weighted decibels.
Aggregate noise emission from proposed project construction activities, broken down by sequential phase,
was predicted from the geographic center of the construction site, which serves as the time-averaged
location or geographic acoustical centroid of active construction equipment for the phase under study. The
centroid-to-receptor distance is used in a manner similar to the general assessment technique as described
in the FTA guidance for construction noise assessment, when the location of individual equipment for a
given construction phase is uncertain over some extent of (or the entirety of) the construction site area. In
this studied scenario, because of the equipment location uncertainty, all the equipment for a construction
phase is assumed to operate—on average—from the acoustical centroid position and may be operating up
to eight hours per day (i.e., a typical onsite daytime work shift).
Table 5. Estimated Distances between Construction Activities and the Nearest
Noise-sensitive Receptors
Construction Phase
(and Equipment Types Involved)
Distance from Noise-Sensitive Receptor
to Site Acoustical Centroid (Feet)
ST1 ST3
Demolition (concrete saw/industrial saw, rubber-tired dozer,
excavator) 300 285
Site preparation (dozer, tractor, loader, backhoe) 300 285
Grading (excavator, grader, rubber-tired dozer, tractor, loader,
backhoe) 300 285
Building construction (crane, forklift, generator set, tractor,
loader, backhoe, welder) 300 285
Paving (cement and mortar mixer, paver, paving equipment,
roller, tractor, loader, backhoe) 300 285
Architectural coating (air compressor) 300 285
A Microsoft Excel–based noise prediction model emulating and using reference data from the Federal
Highway Administration Roadway Construction Noise Model (RCNM) (FHWA 2008) was used to estimate
construction noise levels at the nearest occupied noise-sensitive land use. (Although the RCNM was funded
and promulgated by the Federal Highway Administration, it is often used for non-roadway projects, because
the same types of construction equipment used for roadway projects are often used for other types of
construction.) Input variables for the predictive modeling consist of the equipment type and number of each
(e.g., two graders, a loader, a tractor), the duty cycle for each piece of equipment (e.g., percentage of time
within a specific time period, such as an hour, when the equipment is expected to operate at full power or
capacity and thus make noise at a level comparable to what is presented in Table 4), and the distance from
the noise-sensitive receiver. The predictive model also considers how many hours that equipment may be
on site and operating (or idling) within an established work shift. Conservatively, no topographical or
structural shielding was assumed in the modeling. The RCNM has default duty-cycle values for the various
pieces of equipment, which were derived from an extensive study of typical construction activity patterns.
Those default duty-cycle values were used for this noise analysis, which is detailed in Appendix B,
Construction Noise Modeling Input and Output, and produce the predicted results displayed in Table 6.
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
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Table 6. Predicted Construction Noise at Indicated Receptors per Activity Phase
Construction Phase
(and Equipment Types Involved)
Predicted Construction Noise
(dBA, hourly Leq) at the NSR
ST1 ST3
Construction Noise Threshold* 77.1 77.6
Demolition (concrete saw/industrial saw, rubber-tired dozer,
excavator) 71.2 71.7
Site preparation (dozer, tractor, loader, backhoe) 69.1 69.5
Grading (excavator, grader, rubber-tired dozer, tractor, loader,
backhoe) 70.4 70.9
Building construction (crane, forklift, generator set, tractor, loader,
backhoe, welder) 67.7 68.2
Paving (cement and mortar mixer, paver, paving equipment, roller,
tractor, loader, backhoe) 71.8 72.2
Architectural coating (air compressor) 58.5 58.9
Do any predicted phase noise levels exceed the threshold? no no
Notes: Leq = equivalent noise level; dBA = A-weighted decibels; NSR = noise-sensitive receptor.
*10 dB greater than the measured sample of outdoor ambient noise level at the NSR.
As presented in Table 6, the estimated construction noise levels are predicted to be as high as 72 dBA Leq
hourly Leq at the nearest NSR during site demolition and paving phases. Although these nearby occupied
properties to the north and south of the Project would be exposed to elevated construction noise levels, the
increased noise levels would typically be relatively short term and, as shown in Table 6, represent a
temporary and less than 10 dB increase of the outdoor ambient sound level. Thus, construction-related
noise impacts would be considered less than significant.
Long-Term Operational
Off-Site Traffic Noise Exposure
The proposed project would result in the creation of additional vehicle trips on local arterial roadways (i.e.,
Carlsbad Village Drive); however, the Project Trip Generation Summary (LLG 2023) demonstrates that the
net effect of substituting current commercial-only land use and associated traffic volumes with that of the
proposed mixed-use project would be a reduction in traffic volumes and thus a corresponding reduction in
traffic noise. Appendix C, Traffic Noise Modeling Input and Output, includes both this Project Trip Generation
Summary and traffic noise prediction worksheets that estimate the with- and without-project traffic noise
levels at baseline noise survey location ST3 (see Table 3). The ST3 survey position is, like the proposed
project, near Carlsbad Village Drive and the “Lofts” existing multi-family (and mixed-use) residential
receptor. The technique to predict traffic noise from both the local Carlsbad Village Drive roadway and the
nearby (and acoustically dominant) I-5 freeway is based upon the Federal Highway Administration (FHWA)
RD-77-108 model that applies Caltrans-adopted “Calveno” curves. In summary, the net change in outdoor
traffic noise due to introduction of the proposed project is negligible because the I-5 freeway traffic is
essentially unaffected, and the change to Carlsbad Village Drive is negative (i.e., a less than one dB reduction).
For these reasons, the impact to offsite exterior traffic noise would be less than significant.
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14814 19 DECEMBER 2023
Stationary Noise Sources
The incorporation of new multi-family homes and a mix of open space uses attributed to development of
the proposed project will add a variety of noise-producing electro-mechanical equipment that include those
presented and discussed in the following paragraphs. Most of these noise-producing equipment or sound
sources would be considered stationary, or limited in mobility to a defined area. Using the commercially
available Datakustik CadnaA outdoor sound propagation prediction model, which incorporates
International Organization of Standardization (ISO) 9613-2 algorithms and reference data, project-
attributed operational noise at nearby community receptors was predicted using several parameters and
assumptions as follows:
The model calculation area encompasses the Project and surrounding land uses that adjoin its
boundary.
Acoustical ground absorption of the Project site and the surrounding topography (conservatively
modeled as flat, which generally approximates the site terrain characteristics) is set at 0.50, which on
a zero (reflective) to one (absorptive) scale approximates a combination of the grass-covered soils that
generally surround the Project area and any anticipated loosely graveled Project site cover.
Meteorological conditions presume “calm” wind conditions (i.e., less than 0.5 meters per second in any
direction) and average air temperature and relative humidity of 50 degrees Fahrenheit and 70%,
respectively.
The model “configuration” settings include reflection order set to “1”, which can be interpreted to mean
that a sound emission path from a source will continue to be analyzed after impingement upon and
reflection from the first intervening structure or barrier.
Please see Appendix D for quantitative details of the inputs and outputs that form the basis of the following
assessment presentations.
Residential Unit Heating, Ventilation, and Air Conditioning Noise
For purposes of this analysis, each of the new occupied residential units would be expected to feature a
split-system type air-conditioning unit, with an outdoor-exposed air-cooled (2 to 3-ton refrigeration capacity)
condenser (ACC) unit having an SPL of approximately 68 dBA at 3 feet based on available data from a likely
manufacturer (Carrier 2012). All such ACC units, as well as comparable air-conditioning units for the three
retail buildings, would be located on the building rooftops. Table 7 presents the predicted aggregate noise
level for each of three elevations above grade (roughly corresponding with potential ground floor, 2nd floor,
and 3rd floor receptor heights) at the four surveyed receptor locations from Table 3.
Table 7. Predicted Project Rooftop HVAC Noise Levels
Site Location(s)/Address(es)
At 5-feet
above grade
(dBA Leq)
At 15-feet
above grade
(dBA Leq)
At 25-feet
above grade
(dBA Leq)
ST1
985 Oak Avenue
(single-family residence
965 Oak Avenue
(Windsor Pointe [multi-family
residences])
31.3 32.4 33.7
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Table 7. Predicted Project Rooftop HVAC Noise Levels
Site Location(s)/Address(es)
At 5-feet
above grade
(dBA Leq)
At 15-feet
above grade
(dBA Leq)
At 25-feet
above grade
(dBA Leq)
ST2 3044 Harding Street, 3 feet from
edge of pavement 33.8 34.7 35.3
ST3
1006 Carlsbad Village Drive, 20 feet
from edge of pavement
(multi-family residence)
37.4 38.2 38.3
ST4 958 Oak Avenue 31.6 32.7 34.0
Source: Appendix D.
Notes: Leq = equivalent continuous sound level (time-averaged sound level); Lmax = maximum sound level during the measurement
interval; dBA = A-weighted decibels; ST = short-term noise measurement locations.
For all three receptor elevations at each of the four studied offsite geographic positions, aggregate Project
HVAC noise is predicted to be compliant with the City’s nighttime threshold of 45 dBA hourly Leq. These
predicted noise levels are also much less than the measured samples of daytime sound level in the Project
vicinity, and would also be expected to be much less than nighttime noise levels, since FTA guidance
indicates that nighttime outdoor ambient noise levels are estimated to be 10 dB less than those during the
day when in the proximity of a major highway (FTA 2018) such as the I-5. Therefore, under such conditions,
the operation of commercial and residential building HVAC units would result in a less-than-significant noise
impact.
b) For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a
plan has not been adopted, within two miles of a public airport or public use airport, would the project
expose people residing or working in the project area to excessive noise levels?
There are no private airstrips within the vicinity of the project site. The closest airport to the proposed
project site is the McClellan-Palomar Airport, approximately 6 miles southeast of the site and would
therefore not expose people residing or working in the project area to excessive noise levels. Impacts
would be less than significant.
5.2 Cumulative Impact Assessment
Noise in Excess of Standards
Implementation of the Project as well as unrelated development projects within its vicinity would all be individually
subject to applicable noise regulations, such as the exterior noise level standards already discussed herein. On this
basis, and because noise impacts of the Project with respect to relevant standards would be less than significant
with mitigation, the Project would not contribute to cumulative exceedances of noise standards, and its incremental
effect would be a less-than-significant impact.
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Temporary/Periodic Increases in Ambient Noise Levels
The Project would result in temporary outdoor ambient noise increases during construction activities, as discussed
under Section 5.1. An unrelated but potentially concurrent construction project, such as the anticipated renovation
of the Carlsbad Village Inn, could introduce the potential for a cumulatively considerable significant impact, but it
depends on both the intensity of the construction noise emission and its distance to a studied NSR common to both
the Project and the unrelated other project site. Due to the decrease in propagated noise levels with distance and
the potential presence of physical barriers (i.e., intervening buildings and topography) that can occlude direct and
reflected sound paths between noise sources and a receptor position, such opportunity for cumulative noise effects
tends to be very localized. By way of illustration, if there are two concurrent construction projects of comparable
sound emission intensity, and the activity nearest to the studied noise-sensitive receptor is compliant with the City’s
applicable noise threshold, the other activity could be no closer than three times the distance of the receptor to the
nearest activity and not make a cumulatively measurable contribution to the total and still City-compliant noise
exposure level. If two concurrent projects were close to a receptor, the cumulative noise would be one of the
following:
the louder (in dBA) of the two concurrent activities; or,
a logarithmic sum of the two activity noise levels that, per acoustic principles, cannot be more than 3 dBA
greater than the louder of the two individual noise-producing activities.
In sum, cumulative construction noise is likely to be dominated by the closest or loudest activity to the receptor,
and the combination will be no more than a barely perceptible difference (i.e., up to a 3 dBA change). This can be
exemplified by a predictive study of the Project’s predicted construction noise at ST3 (i.e., a position representing
The Lofts, a multi-family NSR) combined with potential concurrent construction noise originating at the Carlsbad
Village Inn site. Construction noise levels predicted for the Project that appear in Table 6 do not exceed 72.2 dBA
at ST3 and are several dB less than the 77.6 dBA threshold that presumes a 10 dB allowable increase in outdoor
ambient sound level. If construction noise from the unrelated Carlsbad Village Inn renovation project were to occur
and have comparable phase-specific aggregate noise emission levels, meaning it too would cause 72.2 dBA noise
exposure at ST3, then the logarithmic sum would be 75.2 dBA and thus still compliant with a 77.6 dBA threshold.
In this case, neither the Project nor the unrelated proximate project would be making a cumulatively considerable
contribution to push a combined noise level over the threshold. Thus, cumulative impacts associated with
temporary increases in ambient noise levels would be considered less than significant.
Permanent Increase in Ambient Noise Levels
Off-Site Traffic
Implementation of the Project along with development from other unrelated projects would generate off-site traffic
noise. But as discussed in Section 5.1, the Project is expected to yield a net reduction in proximate traffic volumes,
and thus a traffic noise level reduction, based on its substitution of commercial land uses on the current Project
site. Future traffic conditions are likely to exhibit greater volumes of traffic along the same roadways adjoining the
Project due to the effects of other development projects in the area and expected regional growth. This means that
a future year traffic noise setting without the Project traffic added, but including cumulative contribution from other
projects such as those listed in Section 2.4, would result in a higher noise level against which a future-plus-Project
case would be compared. Since the Project traffic contribution would be the same, its effect to the future traffic
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
14814 22 DECEMBER 2023
volumes would be smaller; hence, its change to traffic noise level would be less than the predicted sub-decibel
decrease, and consequently less than the allowable dB increase of 3 dB. On this basis, the Project would have a
less than significant cumulative traffic noise impact.
Stationary Sources
Noise from operation of stationary mechanical equipment added to the outdoor ambient sound environment as a
result of Project implementation would include permanent on-site noise sources (e.g., rooftop HVAC equipment) as
addressed under Section 5.1. A cumulative increase in the outdoor ambient sound environment due to such
operation of Project onsite noise sources and comparable sound sources from other unrelated future projects could
occur, but only if distances to a common receptor position were sufficiently short. Noise emission from HVAC
equipment and other potential onsite sources attenuates with distance and can be occluded by structures and
terrain. Since both the Project and a comparably distant unrelated project with respect to a common NSR, such as
represented by ST3, would need to be compliant with the City’s exterior noise standards, their potential logarithmic
combination would be no greater than 3 dB higher than the louder of the two.
By way of illustration, if the concurrently operating and comparably distant unrelated project were to emit stationary-
source operations noise (e.g., rooftop HVAC) at the same magnitude as that predicted for the Project, a noise level
of 38 dBA at ST3, then the logarithmic combination would be 41 dBA and thus still lower than the City’s nighttime
threshold of 45 dBA. Furthermore, this combined HVAC noise level would still be far less than the pre-existing
nighttime noise level due to the NSR’s proximity to dominant I-5 noise levels estimated to be 57 dBA at night (i.e.,
10 dB less than the daytime measured Leq sample at ST3, per FTA guidance [FTA 2018]). Hence, cumulative impacts
to outdoor ambient noise levels resulting from Project stationary sources would be less than significant.
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6 Summary of Findings
This noise report was conducted for the proposed project. The results indicate that potential impacts during
construction would be less than significant. Noise impacts due to operation of the proposed project (including traffic
noise) would also be less than significant. No noise mitigation measures are anticipated at this time. Cumulative
impacts area also found to be less than significant.
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7 References Cited
Caltrans (California Department of Transportation). 2013. Technical Noise Supplement to the Traffic Noise
Analysis Protocol. September.
Caltrans. 2020. Truck Traffic. https://dot.ca.gov/programs/traffic-operations/census
Carrier. 2012. CA16NA 018-061 Single-Stage Air Conditioner w/ Puron Refrigerant. Catalog No: CA16NA-06PD.
https://resource.carrierenterprise.com/is/content/Watscocom/carrier_ca16na03600g_article_1404816
230548_en_ss?_ga=2.123164302.489492439.1570570581-792571132.1570570581
City of Carlsbad. 2015. City of Carlsbad General Plan. Noise Element.
DOT (U.S. Department of Transportation). 2006. FHWA Roadway Construction Noise Model: User’s Guide. Final
Report. FHWA-HEP-06-015. DOT-VNTSC-FHWA-06-02. Cambridge, Massachusetts: DOT, Research and
Innovative Technology Administration. August 2006.
FHWA. 2008. Roadway Construction Noise Model (RCNM), Software Version 1.1. U.S. Department of
Transportation, Research and Innovative Technology Administration, John A. Volpe National
Transportation Systems Center, Environmental Measurement and Modeling Division. Washington, D.C.
December 8, 2008.
FTA (Federal Transit Administration). 2018. Transit Noise and Vibration Impact Assessment. FTA Report
No. 0123. September.
Linscott Law & Greenspan. 2023. Project Trip Generation Summary. Carlsbad Village Mixed Use Project. November
10th.
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CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
Appendix A
Baseline Noise Measurement Field Data
Field Noise Measurement Data
Record: 1498
Project Name Carlsbad village
Observer(s)Connor Burke
Date 2022-10-19
Meteorological Conditions
Temp (F)72
Humidity % (R.H.)40
Wind Light
Wind Speed (MPH)5
Wind Direction East
Sky Sunny
Instrument and Calibrator Information
Instrument Name List (ENC) Rion NL-52
Instrument Name (ENC) Rion NL-52
Instrument Name Lookup Key (ENC) Rion NL-52
Manufacturer Rion
Model NL-52
Serial Number 553896
Calibrator Name (ENC) LD CAL150
Calibrator Name (ENC) LD CAL150
Calibrator Name Lookup Key (ENC) LD CAL150
Calibrator Manufacturer Larson Davis
Calibrator Model LD CAL150
Calibrator Serial #5152
GPS Assistance Used Yes
Pre-Test (dBA SPL)94
Post-Test (dBA SPL)94
Windscreen Yes
Weighting?A-WTD
Slow/Fast?Slow
ANSI?Yes
Monitoring
Record #1
Site ID ST3
Site Location Lat/Long 33.162655, -117.343688
Begin (Time)09:30:00
End (Time)09:45:00
Leq 67.6
Lmax 75.5
Lmin 61.7
Other Lx?L90, L50, L10
L90 63.2
L50 66.2
L10 70.2
Other Lx (Specify Metric)L
Primary Noise Source Traffic
Other Noise Sources (Background)Distant Traffic
Other Noise Sources Additional Description Freeway noise. Train horn.
Is the same instrument and calibrator being used
as previously noted?
Yes
Are the meteorological conditions the same as Yes
Page 1/6
previously noted?
Source Info and Traffic Counts
Number of Lanes 4
Lane Width (feet)10
Roadway Width (feet)40
Roadway Width (m)12.2
Distance to Roadway (feet)20
Distance to Roadway (m)6.1
Distance Measured to Centerline or Edge of
Pavement?
Edge of Pavement
Estimated Vehicle Speed (MPH)35
Traffic Counts
Vehicle Count Summary A 320, MT 6, HT 6, B 0, MC 0
Select Method for Recording Count Duration Enter Manually
Counting Both Directions?Yes
Count Duration (minutes)15
Vehicle Count Tally
Select Method for Vehicle Counts Enter Manually
Number of Vehicles - Autos 320
Number of Vehicles - Medium Trucks 6
Number of Vehicles - Heavy Trucks 6
Number of Vehicles - Buses 0
Number of Vehicles - Motorcyles 0
Description / Photos
Site Photos
Photo
Page 2/6
Monitoring
Record #2
Site ID ST1
Site Location Lat/Long 33.161674, -117.342166
Begin (Time)10:00:00
End (Time)10:15:00
Leq 67.1
Lmax 70.4
Lmin 64.5
Other Lx?L90, L50, L10
L90 65.2
L50 66.9
L10 68.7
Other Lx (Specify Metric)L
Primary Noise Source Traffic
Other Noise Sources Additional Description Freeway traffic dominant
Is the same instrument and calibrator being used
as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes
Description / Photos
Site Photos
Photo
Page 3/6
Monitoring
Record #3
Site ID ST4
Site Location Lat/Long 33.161466, -117.343572
Begin (Time)10:35:00
End (Time)10:50:00
Leq 58.4
Lmax 60.7
Lmin 56.3
Other Lx?L90, L50, L10
L90 57.1
L50 57.8
L10 60.1
Other Lx (Specify Metric)L
Primary Noise Source Traffic
Other Noise Sources Additional Description Freeway noise dominant. AC unit.
Is the same instrument and calibrator being used
as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes
Description / Photos
Site Photos
Photo
Page 4/6
Monitoring
Record #4
Site ID ST2
Site Location Lat/Long 33.161376, -117.344028
Begin (Time)11:00:00
End (Time)11:15:00
Leq 62.7
Lmax 70.4
Lmin 58.5
Other Lx?L90, L50, L10
L90 59.1
L50 60.7
L10 65.5
Other Lx (Specify Metric)L
Primary Noise Source Traffic
Other Noise Sources (Background)Birds, Distant Traffic
Other Noise Sources Additional Description Freeway audible.
Is the same instrument and calibrator being used
as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes
Source Info and Traffic Counts
Number of Lanes 2
Lane Width (feet)10
Roadway Width (feet)20
Roadway Width (m)6.1
Distance to Roadway (feet)3
Distance to Roadway (m)0.9
Distance Measured to Centerline or Edge of
Pavement?
Edge of Pavement
Estimated Vehicle Speed (MPH)25
Traffic Counts
Vehicle Count Summary A 118, MT 2, HT 0, B 0, MC 0
Select Method for Recording Count Duration Enter Manually
Counting Both Directions?Yes
Count Duration (minutes)15
Vehicle Count Tally
Select Method for Vehicle Counts Enter Manually
Number of Vehicles - Autos 118
Number of Vehicles - Medium Trucks 2
Number of Vehicles - Heavy Trucks 0
Number of Vehicles - Buses 0
Number of Vehicles - Motorcyles 0
Description / Photos
Page 5/6
Site Photos
Photo
Powered by TCPDF (www.tcpdf.org)
Page 6/6
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
Appendix B
Construction Noise Modeling Input and Output
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix B - Construction Noise Modeling Input and Output
To User: bordered cells are inputs, unbordered cells have formulae noise level limit (ambient + 10 dB) for construction phase at NSR =77
allowable hours over which Leq is to be averaged (example: 8 per FTA guidance) = 1
Construction Activity Equipment Total
Equipment Qty
AUF % (from
FHWA RCNM)
Reference Lmax
@ 50 ft. from
FHWA RCNM
Client Equipment
Description, Data
Source and/or Notes
Source to NSR
Distance (ft.)
Barrier / Topo
Insertion Loss (dB)
Distance-
Adjusted Lmax
Allowable Operation
Time (hours)
Allowable
Operation Time
(minutes)
Predicted 1-
hour Leq
Demolition Concrete Saw 1 20 90 Concrete/Industrial Saws 300 74.4 1 60 67
Dozer 2 40 82 Rubber Tired Dozers 300 66.4 1 60 65
Excavator 3 40 81 300 65.4 1 60 66
Total for Demolition Phase:71.2
Site Preparation Dozer 3 40 82 300 66.4 1 60 67
Tractor 1 40 84 Tractors/Loaders/Backhoues 300 68.4 1 60 64
Front End Loader 0 40 79 Tractors/Loaders/Backhoues 300 63.4 1 60 0
Backhoe 0 40 78 Tractors/Loaders/Backhoues 300 62.4 1 60 0
Total for Site Preparation Phase:69.1
Grading Excavator 1 40 81 300 65.4 1 60 61
Grader 1 40 85 300 69.4 1 60 65
Dozer 1 40 82 Rubber Tired Dozers 300 66.4 1 60 62
Tractor 1 40 84 Tractors/Loaders/Backhoues 300 68.4 1 60 64
Front End Loader 1 40 79 Tractors/Loaders/Backhoues 300 63.4 1 60 59
Backhoe 1 40 78 Tractors/Loaders/Backhoues 300 62.4 1 60 58
Total for Grading Phase:70.4
Building Construction Crane 1 16 81 300 65.4 1 60 57
Man Lift 3 20 75 Forklifts 300 59.4 1 60 57
Generator 1 50 72 Generator Sets 300 56.4 1 60 53
Tractor 1 40 84 Tractors/Loaders/Backhoues 300 68.4 1 60 64
Front End Loader 1 40 79 Tractors/Loaders/Backhoues 300 63.4 1 60 59
Backhoe 1 40 78 Tractors/Loaders/Backhoues 300 62.4 1 60 58
Welder / Torch 1 40 73 Welders 300 57.4 1 60 53
Total for Building Construction Phase:67.7
Paving Concrete Mixer Truck 2 40 79 Cement and Mortar Mixers 300 63.4 1 60 62
Paver 1 50 77 300 61.4 1 60 58
All Other Equipment > 5 HP 2 50 85 Paving Equipment 300 69.4 1 60 69
Roller 2 20 80 300 64.4 1 60 60
Tractor 1 40 84 Tractors/Loaders/Backhoues 300 68.4 1 60 64
Front End Loader 0 40 79 Tractors/Loaders/Backhoues 300 63.4 1 60 0
Backhoe 0 40 78 Tractors/Loaders/Backhoues 300 62.4 1 60 0
Total for Paving Phase:71.8
Architectural Coating Compressor (air)1 40 78 300 62.4 1 60 58
Total for Architectural Coating Phase:58.5
ST1_centroid Dudek Project No. 14814 ST1_centroid
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix B - Construction Noise Modeling Input and Output
To User: bordered cells are inputs, unbordered cells have formulae noise level limit (ambient + 10 dB) for construction phase at NSR =78
allowable hours over which Leq is to be averaged (example: 8 per FTA guidance) = 1
Construction Activity Equipment Total
Equipment Qty
AUF % (from
FHWA RCNM)
Reference Lmax
@ 50 ft. from
FHWA RCNM
Client Equipment
Description, Data
Source and/or Notes
Source to NSR
Distance (ft.)
Barrier / Topo
Insertion Loss (dB)
Distance-
Adjusted Lmax
Allowable Operation
Time (hours)
Allowable
Operation Time
(minutes)
Predicted 1-
hour Leq
Demolition Concrete Saw 1 20 90 Concrete/Industrial Saws 285 74.9 1 60 68
Dozer 2 40 82 Rubber Tired Dozers 285 66.9 1 60 66
Excavator 3 40 81 285 65.9 1 60 67
Total for Demolition Phase:71.7
Site Preparation Dozer 3 40 82 285 66.9 1 60 68
Tractor 1 40 84 Tractors/Loaders/Backhoues 285 68.9 1 60 65
Front End Loader 0 40 79 Tractors/Loaders/Backhoues 285 63.9 1 60 0
Backhoe 0 40 78 Tractors/Loaders/Backhoues 285 62.9 1 60 0
Total for Site Preparation Phase:69.5
Grading Excavator 1 40 81 285 65.9 1 60 62
Grader 1 40 85 285 69.9 1 60 66
Dozer 1 40 82 Rubber Tired Dozers 285 66.9 1 60 63
Tractor 1 40 84 Tractors/Loaders/Backhoues 285 68.9 1 60 65
Front End Loader 1 40 79 Tractors/Loaders/Backhoues 285 63.9 1 60 60
Backhoe 1 40 78 Tractors/Loaders/Backhoues 285 62.9 1 60 59
Total for Grading Phase:70.9
Building Construction Crane 1 16 81 285 65.9 1 60 58
Man Lift 3 20 75 Forklifts 285 59.9 1 60 58
Generator 1 50 72 Generator Sets 285 56.9 1 60 54
Tractor 1 40 84 Tractors/Loaders/Backhoues 285 68.9 1 60 65
Front End Loader 1 40 79 Tractors/Loaders/Backhoues 285 63.9 1 60 60
Backhoe 1 40 78 Tractors/Loaders/Backhoues 285 62.9 1 60 59
Welder / Torch 1 40 73 Welders 285 57.9 1 60 54
Total for Building Construction Phase:68.2
Paving Concrete Mixer Truck 2 40 79 Cement and Mortar Mixers 285 63.9 1 60 63
Paver 1 50 77 285 61.9 1 60 59
All Other Equipment > 5 HP 2 50 85 Paving Equipment 285 69.9 1 60 70
Roller 2 20 80 285 64.9 1 60 61
Tractor 1 40 84 Tractors/Loaders/Backhoues 285 68.9 1 60 65
Front End Loader 0 40 79 Tractors/Loaders/Backhoues 285 63.9 1 60 0
Backhoe 0 40 78 Tractors/Loaders/Backhoues 285 62.9 1 60 0
Total for Paving Phase:72.2
Architectural Coating Compressor (air)1 40 78 285 62.9 1 60 59
Total for Architectural Coating Phase:58.9
ST3_centroid Dudek Project No. 14814 ST3_centroid
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
Appendix C
Traffic Noise Modeling Input and Output
Volume Rate In Out Total Rate In Out Total
Proposed Project
Apartment (Multi-family units >20 DU/acre) b 218 DU 6 /DU 1,308 8% 20% : 80% 21 84 105 9% 70% : 30% 83 35 118
Supermarket 5.8 KSF 150 /KSF 870 4% 70% : 30% 25 10 35 10% 50% : 50% 44 43 87
Retail / Strip Commercial 2 KSF 40 /KSF 80 3% 60% : 40% 1 1 2 9% 50% : 50% 4 3 7
Quality Restaurant 6 KSF 100 /KSF 600 1% 60% : 40% 4 2 6 8% 70% : 30% 34 14 48
Project Subtotal 2,858 5%51 97 148 9%165 95 260
Mixed Use Reduction c -616 -4 -4 -8 -39 -41 -80
Final Project Trips 2,242 47 93 140 126 54 180
Existing to be replaced
Neighborhood Shopping Center d 58.7 KSF 120 /KSF 7,044 4% 60% : 40% 169 113 282 10% 50% : 50% 352 352 704
Net New Trip Generation -4,802 -122 -20 -142 -226 -298 -524
Footnotes:
Therefore, the SANDAG "Neighborhood Shopping Center" rate is appropriate for the existing site. This rate accurately reflects the operations of a shopping center as a whole including trip-chaining
and internal interaction between individual uses that are typical of similar shopping centers. If specific trip rates for existing individual uses within the shopping center were applied, this would
increase the existing trip generation and therefore overstate the net trip reduction associated with the proposed project. The individual use trip rates pertain to isolated uses and do not accurately
reflect driveway trips for a combined shopping center.
Split Split
Project Trip Generation Summary (rev 11.10.2023)
Carlsbad Village Mixed Use
Land Use Quantity Daily Volumes AM Peak Hour PM Peak Hour
Rate a
a. Trip generation rates from SANGAG's (Not So) Brief Guide of Vehicular Traffic Generation Rates for the San Diego Region, April 2002. ("SANDAG Brief Guide")
b. The site acreage is 4.12 therefore the residential density calculates to 53 DU/acre (218 / 4.12 = 53).
d. Per SANDAG this land use is typically less than 15 acres, less than 125,000 sq. ft., w/usually grocery & drugstore, cleaners, beauty & barber shop, & fast food services)
The existing 4.12 acre, 58.7 KSF site contains all of these individual uses including: grocery, drugstore, cleaners, barber shop, and eating establishments.
c. Mixed use reduction for AM/PM peak hours calculated using NCHRP 8-51 Internal Trip Capture Estimation Tool. Daily reduction estimated using relationship between peak hours and daily
volumes for unadjusted project trips.
N:\3651\Trip Generation\Trip Generation11/13/2023 10:11 AM
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix C - Traffic Noise Modeling Input and Output
Roadway Traffic Noise Prediction (CNEL)
(FHWA RD-77-108, using Calveno curves)Auto %93.74%Day 80.00%Day Evening Nighttime Equivalent
MT (%)3.71%Evening 10.00%Auto 74.99%9.37%9.37%198.4%
Project:HT (%)2.55%Nighttime 10.00%MT 2.97%0.37%0.37%7.9%
HT 2.04%0.25%0.25%5.4%
Auto MT HT CNEL
Noise Noise Noise Total
(at 15m)(at 15m)(at 15m)(at 15m)
Existing (2025)Interstate-5 Freeway Southbound ramp onto I-5 6,200 30 58.3 54.9 58.9 62.5 350 49.7 49.9
Southbound I-5 86,300 65 79.4 71.6 73.4 80.9 435 66.7 66.9
Southbound I-5 HOV lane 12,700 65 71.1 63.2 65.1 72.6 455 58.1 58.3
Northbound I-5 HOV lane 13,600 65 71.4 63.5 65.4 72.9 500 57.8 58.0
Northbound I-5 87,100 65 79.4 71.6 73.5 81.0 530 65.5 65.7
total CNEL at above receptor:67.8 68.0
L VEHICLE TRUCK TRUCK TRUCK AADT TOTAL %TRUCK AADT EAL
POST E AADT AADT % TOT ----------------- ------By Axle------ ---------------- --------------- -------By Axle------------------2-WAY
RTE DIST CNTY MILE DESCRIPTION TOTAL TOTAL VEH 2 3 4 5+2 3 4 5+(1000)
data from 2020 Caltrans truck AADT -->5 11 SD 42.712 Leucadia Blvd. 17400 10893 6.26 6,456 591 237 3,607 59.27 5.43 2.18 33.12 1,560
3.710302
* based on conversion of CNEL to Leq(peak hour) per Caltrans TeNS eq. 2-32 (Caltrans 2013)
Tooley - Carlsbad Village Mixed Use
Study Year or Condition Roadway Roadway Segment and Direction of Traffic
Average Weekday Traffic
(AWT)
at ST3
Leq*
(dBA)
2.55
User Inputs (boxed cells)Traffic Percentages by Vehicle Type
Speed (mph)
Distance
(feet) CNEL (dBA)
Calveno-based-traffic-noise_mcs120523 Dudek Project No. 14814 I5_Caltrans
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix C - Traffic Noise Modeling Input and Output
Roadway Traffic Noise Prediction (CNEL)
(FHWA RD-77-108, using Calveno curves)Auto %96.39%Day 80.00%Day Evening Nighttime Equivalent
MT (%)1.81%Evening 10.00%Auto 77.11% 9.64% 9.64% 204.0%
Project:HT (%)1.81%Nighttime 10.00%MT 1.45% 0.18% 0.18% 3.8%
HT 1.45% 0.18% 0.18% 3.8%
Auto MT HT CNEL
Noise Noise Noise Total
(at 15m) (at 15m) (at 15m) (at 15m)
20,500 25 61.3 55.7 61.9 65.1 70 62.8 63.1
15-min traffic counts: (from CB 10/19/22 field survey at ST3)acoustic contribution from I-5 traffic (see "I5_Caltrans" worksheet): 67.8 68.0
autos 320
medium trucks 6 logarithmic sum of Carlsbad Village Drive and I-5 freeway traffic noise:69.0 69.2
heavy trucks 6 measured noise level at ST3 (Oct. 19, 2022 field survey sample Leq):67.6
buses 0 difference between measured outdoor noise level at ST3 and prediction: -1.6
validated? (< +/-3 dB): yes
* based on conversion of CNEL to Leq(peak hour) per Caltrans TeNS eq. 2-32 (Caltrans 2013)
Existing (2025) without Project
User Inputs (boxed cells)Traffic Percentages by Vehicle Type
Tooley - Carlsbad Village Mixed Use
Study Year or Condition Roadway Roadway Segment and Direction of Traffic
Average
Weekday
Traffic (AWT) Speed (mph)
at ST3
Distance
(feet) CNEL (dBA)
Carlsbad Village Drive west of I-5 and east of Hope
Leq*
(dBA)
Calveno-based-traffic-noise_mcs120523 Dudek Project No. 14814 CVD_woutProj
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix C - Traffic Noise Modeling Input and Output
Roadway Traffic Noise Prediction (CNEL)
(FHWA RD-77-108, using Calveno curves)Auto %96.39%Day 80.00%Day Evening Nighttime Equivalent
MT (%)1.81%Evening 10.00%Auto 77.11% 9.64% 9.64% 204.0%
Project:HT (%)1.81%Nighttime 10.00%MT 1.45% 0.18% 0.18% 3.8%
HT 1.45% 0.18% 0.18% 3.8%
Auto MT HT CNEL
Noise Noise Noise Total
(at 15m) (at 15m) (at 15m) (at 15m)
15,698 25 60.2 54.6 60.7 64.0 70 61.7 61.9
from Sept. 15, 2022 LLG Project Trip Generation Summary:15-min traffic counts: (from CB 10/19/22 field survey at ST3)acoustic contribution from I-5 traffic (see "I5_Caltrans" worksheet): 67.8 68.0
ADT of current shopping center to be replaced -7044 autos 320
Project added ADT 2242 medium trucks 6 logarithmic sum of Carlsbad Village Drive and I-5 freeway traffic noise:68.8 69.0
net change to Carlsbad Village Drive 2025 ADT:-4802 heavy trucks 6 logarithmic sum of Carlsbad Village Drive and I-5 freeway traffic noise (without Project): 69.0 69.2
buses 0 difference between with and without Project (dB): -0.3 -0.3
significant impact? (> +3 dB): no no
* based on conversion of CNEL to Leq(peak hour) per Caltrans TeNS eq. 2-32 (Caltrans 2013)
at ST3
Distance
(feet) CNEL (dBA)
Leq*
(dBA)
Existing (2025) without Project Carlsbad Village Drive west of I-5 and east of Hope
User Inputs (boxed cells)Traffic Percentages by Vehicle Type
Tooley - Carlsbad Village Mixed Use
Study Year or Condition Roadway Roadway Segment and Direction of Traffic
Average
Weekday
Traffic (AWT) Speed (mph)
Calveno-based-traffic-noise_mcs120523 Dudek Project No. 14814 CVD_withProj
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix C - Traffic Noise Modeling Input and Output
Calveno-based-traffic-noise_mcs120523 Dudek Project No. 14814 CVD_SANDAG_TFIC
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT
Appendix D
Project HVAC Noise Prediction
0 144 288 432 576 720 864 1008 1152 1296 1440 1584 1728 1872 2016 2160 2304 2448 2592 2736 2880 3024 3168 3312 3456 3600 3744 3888 4032 4176 4320 4464 4608 4752 4896 5040 5184 5328 5472 5616 5760 5904 6048 6192 6336 6480 6624 6768 6912 7056 7200 7344 7488 7632 7776 7920 8064 8208 8352 8496 8640 8784 8928 9072 9216 9360 9504 9648 9792 9936
100
8
0
102
2
4
103
6
8
105
1
2
106
5
6
108
0
0
109
4
4
110
8
8
112
3
2
113
7
6
115
2
0
116
6
4
118
0
8
119
5
2
120
9
6
122
4
0
123
8
4
125
2
8
126
7
2
128
1
6
129
6
0
131
0
4
132
4
8
133
9
2
135
3
6
136
8
0
138
2
4
139
6
8
141
1
2
142
5
6
144
0
0
145
4
4
146
8
8
148
3
2
149
7
6
151
2
0
152
6
4
154
0
8
155
5
2
156
9
6
158
4
0
159
8
4
161
2
8
162
7
2
164
1
6
165
6
0
167
0
4
168
4
8
169
9
2
171
3
6
172
8
0
174
2
4
175
6
8
177
1
2
178
5
6
180
0
0
181
4
4
182
8
8
184
3
2
185
7
6
187
2
0
188
6
4
190
0
8
191
5
2
192
9
6
194
4
0
195
8
4
197
2
8
198
7
2
200
1
6
201
6
0
203
0
4
204
4
8
205
9
2
207
3
6
208
8
0
210
2
4
211
6
8
213
1
2
214
5
6
216
0
0
217
4
4
218
8
8
220
3
2
221
7
6
223
2
0
224
6
4
226
0
8
227
5
2
228
9
6
230
4
0
231
8
4
233
2
8
234
7
2
236
1
6
237
6
0
239
0
4
240
4
8
241
9
2
243
3
6
244
8
0
246
2
4
247
6
8
249
1
2
250
5
6
252
0
0
253
4
4
254
8
8
256
3
2
257
7
6
259
2
0
260
6
4
262
0
8
263
5
2
264
9
6
266
4
0
267
8
4
269
2
8
270
7
2
272
1
6
273
6
0
275
0
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
SOURCES: Tooley 2022; Dudek 2022
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE D-1
0 62.5 125 Feet Aggregate Project Operations Noise Prediction Results - across horizontal plane 5' above grade
Aggregate A-weighted
Sound Pressure Level
(SPL)
ST3
ST1
ST4
ST2
0 144 288 432 576 720 864 1008 1152 1296 1440 1584 1728 1872 2016 2160 2304 2448 2592 2736 2880 3024 3168 3312 3456 3600 3744 3888 4032 4176 4320 4464 4608 4752 4896 5040 5184 5328 5472 5616 5760 5904 6048 6192 6336 6480 6624 6768 6912 7056 7200 7344 7488 7632 7776 7920 8064 8208 8352 8496 8640 8784 8928 9072 9216 9360 9504 9648 9792 9936
100
8
0
102
2
4
103
6
8
105
1
2
106
5
6
108
0
0
109
4
4
110
8
8
112
3
2
113
7
6
115
2
0
116
6
4
118
0
8
119
5
2
120
9
6
122
4
0
123
8
4
125
2
8
126
7
2
128
1
6
129
6
0
131
0
4
132
4
8
133
9
2
135
3
6
136
8
0
138
2
4
139
6
8
141
1
2
142
5
6
144
0
0
145
4
4
146
8
8
148
3
2
149
7
6
151
2
0
152
6
4
154
0
8
155
5
2
156
9
6
158
4
0
159
8
4
161
2
8
162
7
2
164
1
6
165
6
0
167
0
4
168
4
8
169
9
2
171
3
6
172
8
0
174
2
4
175
6
8
177
1
2
178
5
6
180
0
0
181
4
4
182
8
8
184
3
2
185
7
6
187
2
0
188
6
4
190
0
8
191
5
2
192
9
6
194
4
0
195
8
4
197
2
8
198
7
2
200
1
6
201
6
0
203
0
4
204
4
8
205
9
2
207
3
6
208
8
0
210
2
4
211
6
8
213
1
2
214
5
6
216
0
0
217
4
4
218
8
8
220
3
2
221
7
6
223
2
0
224
6
4
226
0
8
227
5
2
228
9
6
230
4
0
231
8
4
233
2
8
234
7
2
236
1
6
237
6
0
239
0
4
240
4
8
241
9
2
243
3
6
244
8
0
246
2
4
247
6
8
249
1
2
250
5
6
252
0
0
253
4
4
254
8
8
256
3
2
257
7
6
259
2
0
260
6
4
262
0
8
263
5
2
264
9
6
266
4
0
267
8
4
269
2
8
270
7
2
272
1
6
273
6
0
275
0
4
1
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113
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120
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126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
SOURCES: Tooley 2022; Dudek 2022
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE D-2
0 74.5 149 Feet Aggregate Project Operations Noise Prediction Results - across horizontal plane 15' above grade
Aggregate A-weighted
Sound Pressure Level
(SPL)
ST3
ST1
ST4
ST2
0 144 288 432 576 720 864 1008 1152 1296 1440 1584 1728 1872 2016 2160 2304 2448 2592 2736 2880 3024 3168 3312 3456 3600 3744 3888 4032 4176 4320 4464 4608 4752 4896 5040 5184 5328 5472 5616 5760 5904 6048 6192 6336 6480 6624 6768 6912 7056 7200 7344 7488 7632 7776 7920 8064 8208 8352 8496 8640 8784 8928 9072 9216 9360 9504 9648 9792 9936
100
8
0
102
2
4
103
6
8
105
1
2
106
5
6
108
0
0
109
4
4
110
8
8
112
3
2
113
7
6
115
2
0
116
6
4
118
0
8
119
5
2
120
9
6
122
4
0
123
8
4
125
2
8
126
7
2
128
1
6
129
6
0
131
0
4
132
4
8
133
9
2
135
3
6
136
8
0
138
2
4
139
6
8
141
1
2
142
5
6
144
0
0
145
4
4
146
8
8
148
3
2
149
7
6
151
2
0
152
6
4
154
0
8
155
5
2
156
9
6
158
4
0
159
8
4
161
2
8
162
7
2
164
1
6
165
6
0
167
0
4
168
4
8
169
9
2
171
3
6
172
8
0
174
2
4
175
6
8
177
1
2
178
5
6
180
0
0
181
4
4
182
8
8
184
3
2
185
7
6
187
2
0
188
6
4
190
0
8
191
5
2
192
9
6
194
4
0
195
8
4
197
2
8
198
7
2
200
1
6
201
6
0
203
0
4
204
4
8
205
9
2
207
3
6
208
8
0
210
2
4
211
6
8
213
1
2
214
5
6
216
0
0
217
4
4
218
8
8
220
3
2
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7
6
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2
0
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6
4
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0
8
227
5
2
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9
6
230
4
0
231
8
4
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2
8
234
7
2
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1
6
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6
0
239
0
4
240
4
8
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9
2
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3
6
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8
0
246
2
4
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6
8
249
1
2
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5
6
252
0
0
253
4
4
254
8
8
256
3
2
257
7
6
259
2
0
260
6
4
262
0
8
263
5
2
264
9
6
266
4
0
267
8
4
269
2
8
270
7
2
272
1
6
273
6
0
275
0
4
1
2
3
4
5
6
7
8
9
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130
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132
133
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135
136
137
138
139
140
141
142
143
144
SOURCES: Tooley 2022; Dudek 2022
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE D-3
0 74.5 149 Feet Aggregate Project Operations Noise Prediction Results - across horizontal plane 25' above grade
Aggregate A-weighted
Sound Pressure Level
(SPL)
ST3
ST1
ST4
ST2
0 144 288 432 576 720 864 1008 1152 1296 1440 1584 1728 1872 2016 2160 2304 2448 2592 2736 2880 3024 3168 3312 3456 3600 3744 3888 4032 4176 4320 4464 4608 4752 4896 5040 5184 5328 5472 5616 5760 5904 6048 6192 6336 6480 6624 6768 6912 7056 7200 7344 7488 7632 7776 7920 8064 8208 8352 8496 8640 8784 8928 9072 9216 9360 9504 9648 9792 9936
100
8
0
102
2
4
103
6
8
105
1
2
106
5
6
108
0
0
109
4
4
110
8
8
112
3
2
113
7
6
115
2
0
116
6
4
118
0
8
119
5
2
120
9
6
122
4
0
123
8
4
125
2
8
126
7
2
128
1
6
129
6
0
131
0
4
132
4
8
133
9
2
135
3
6
136
8
0
138
2
4
139
6
8
141
1
2
142
5
6
144
0
0
145
4
4
146
8
8
148
3
2
149
7
6
151
2
0
152
6
4
154
0
8
155
5
2
156
9
6
158
4
0
159
8
4
161
2
8
162
7
2
164
1
6
165
6
0
167
0
4
168
4
8
169
9
2
171
3
6
172
8
0
174
2
4
175
6
8
177
1
2
178
5
6
180
0
0
181
4
4
182
8
8
184
3
2
185
7
6
187
2
0
188
6
4
190
0
8
191
5
2
192
9
6
194
4
0
195
8
4
197
2
8
198
7
2
200
1
6
201
6
0
203
0
4
204
4
8
205
9
2
207
3
6
208
8
0
210
2
4
211
6
8
213
1
2
214
5
6
216
0
0
217
4
4
218
8
8
220
3
2
221
7
6
223
2
0
224
6
4
226
0
8
227
5
2
228
9
6
230
4
0
231
8
4
233
2
8
234
7
2
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1
6
237
6
0
239
0
4
240
4
8
241
9
2
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3
6
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8
0
246
2
4
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6
8
249
1
2
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5
6
252
0
0
253
4
4
254
8
8
256
3
2
257
7
6
259
2
0
260
6
4
262
0
8
263
5
2
264
9
6
266
4
0
267
8
4
269
2
8
270
7
2
272
1
6
273
6
0
275
0
4
1
2
3
4
5
6
7
8
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125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
SOURCES: Tooley 2022; Dudek 2022
Carlsbad Village Mixed Use Project (Dudek No. 14814)
FIGURE D-4
0 74.5 149 Feet Aggregate Project Operations Noise Prediction Results - across horizontal plane 25' above grade - no pool or 5th floor deck noises
Aggregate A-weighted
Sound Pressure Level
(SPL)
ST3
ST1
ST4
ST2
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix D - Project HVAC Noise Prediction
Receivers 5ft_plane
Name M. ID Level Lr Limit. Value Land Use Height CoordinatesDay Night Day Night Type Auto Noise Type X Y Z
(dBA) (dBA) (dBA) (dBA)(ft)(ft) (ft) (ft)
noise sensitive receptor (and baseline SPL spot) ST1 39 39 0 0 x Total 5 r 953.25 410 5baseline SPL spot ST2 39.5 39.5 0 0 x Total 5 r 329.65 382.19 5noise-sensitive receiver (and baseline SPL spot) ST3 44.5 44.5 0 0 x Total 5 r 516.93 791.87 5noise sensitive receptor (and baseline SPL spot) ST4 35.8 35.8 0 0 x Total 5 r 571.59 280.3 5
15ft_plane
Name M. ID Level Lr Limit. Value Land Use Height CoordinatesDay Night Day Night Type Auto Noise Type X Y Z
(dBA) (dBA) (dBA) (dBA)(ft)(ft) (ft) (ft)
noise sensitive receptor (and baseline SPL spot) ST1 40.2 40.2 0 0 x Total 15 r 953.25 410 15baseline SPL spot ST2 40.4 40.4 0 0 x Total 15 r 329.65 382.19 15noise-sensitive receiver (and baseline SPL spot) ST3 45 45 0 0 x Total 15 r 516.93 791.87 15noise sensitive receptor (and baseline SPL spot) ST4 37.2 37.2 0 0 x Total 15 r 571.59 280.3 15
25ft_plane
Name M. ID Level Lr Limit. Value Land Use Height CoordinatesDay Night Day Night Type Auto Noise Type X Y Z
(dBA) (dBA) (dBA) (dBA)(ft)(ft) (ft) (ft)
noise sensitive receptor (and baseline SPL spot) ST1 41.1 41.1 0 0 x Total 25 r 953.25 410 25baseline SPL spot ST2 41 41 0 0 x Total 25 r 329.65 382.19 25noise-sensitive receiver (and baseline SPL spot) ST3 45.6 45.6 0 0 x Total 25 r 516.93 791.87 25noise sensitive receptor (and baseline SPL spot) ST4 39.2 39.2 0 0 x Total 25 r 571.59 280.3 25
25ft_plane; without pool and fifth-floor common area sound sources
Name M. ID Level Lr Limit. Value Land Use Height CoordinatesDay Night Day Night Type Auto Noise Type X Y Z
(dBA) (dBA) (dBA) (dBA)(ft)(ft) (ft) (ft)
noise sensitive receptor (and baseline SPL spot) ST1 39.2 39.2 0 0 x Total 25 r 953.25 410 25baseline SPL spot ST2 37.6 37.6 0 0 x Total 25 r 329.65 382.19 25noise-sensitive receiver (and baseline SPL spot) ST3 39.5 39.5 0 0 x Total 25 r 516.93 791.87 25noise sensitive receptor (and baseline SPL spot) ST4 35.8 35.8 0 0 x Total 25 r 571.59 280.3 25
Area Sources
Name M. ID Result. PWL Result. PWL''Lw / Li Correction Sound Reduction AttenuationOperating Time K0 Freq. Direct. Moving Pt. SrcDay Evening Night Day Evening Night Type Value norm. Day Evening Night R Area Day Special Night Number
(dBA) (dBA) (dBA) (dBA) (dBA) (dBA)dB(A) dB(A) dB(A) dB(A)(ft²)(min) (min) (min) (dB) (Hz)Day Evening Night
Building Retail A Noise Source BRANS 79.2 79.2 79.2 51.7 51.7 51.7 Lw RAAHU++RBAHU++RAAC++RBAC0 0 0 0 (none)Building Retail B Noise Source BRBNS 77.1 77.1 77.1 51.4 51.4 51.4 Lw RCAHU++RCAC 0 0 0 0 (none)Residential Tower 1 AC RT1AC 88.9 88.9 88.9 58.1 58.1 58.1 Lw R1AC++R2AC++R3AC++R4AC++R5AC0 0 0 3.4899 0 (none)Residential Tower 2 AC RT2AC 89.6 89.6 89.6 57 57 57 Lw R1AC++R2AC++R3AC++R4AC++R5AC0 0 0 2.8421 0 (none)
Residential Tower 2 AHU RT2AHU 87.5 87.5 87.5 56.3 56.3 56.3 Lw R1AHU++R2AHU++R3AHU++R4AHU++R5AHU0 0 0 2.8421 0 (none)
Residential Tower 1 AHU RT1AHU 86.9 86.9 86.9 55 55 55 Lw R1AHU++R2AHU++R3AHU++R4AHU++R5AHU0 0 0 3.4899 0 (none)Bldg C northern deck guest speech BCNDGS 90 90 90 72.6 72.6 72.6 Lw HSS 0 0 0 -93.2 0 (none)Bldg C southern deck guest speech BCSDGS 90 90 90 66.4 66.4 66.4 Lw HSS 0 0 0 -93.2 0 (none)Bldg C northern deck guest speech BCNDGS 90 90 90 69.2 69.2 69.2 Lw HSS 0 0 0 -93.2 0 (none)
pool area guest speech PAGS 90 90 90 69.7 69.7 69.7 Lw HSS 0 0 0 -93.2 0 (none)
Parking Garage lvl 1 noises PGL1N 78 78 78 47.7 47.7 47.7 Lw PM 0 0 0 36.4-15 0 (none)Parking Garage lvl 2 noises PGL2N 75 75 75 44.7 44.7 44.7 Lw PM 0 0 0 36.4-12 0 (none)Parking Garage lvl 3 noises PGL3N 72 72 72 41.7 41.7 41.7 Lw PM 0 0 0 36.4-9 0 (none)Parking Garage lvl 4 noises PGL4N 69 69 69 38.7 38.7 38.7 Lw PM 0 0 0 36.4-6 0 (none)
Parking Garage lvl 5 noises PGL5N 66 66 66 35.7 35.7 35.7 Lw PM 0 0 0 36.4-3 0 (none)
Point Sources
Name M. ID Result. PWL Lw / Li Correction Sound Reduction AttenuationOperating Time K0 Freq. Direct. Height Coordinates
Day Evening Night Type Value norm. Day Evening Night R Area Day Special Night X Y Z
(dBA) (dBA) (dBA)dB(A) dB(A) dB(A) dB(A)(ft²)(min) (min) (min) (dB) (Hz)(ft)(ft) (ft) (ft)Bldg C northern deck outdoor spkr BCNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 591.64 506.55 54.25Bldg C northern deck outdoor spkr BCNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 605.1 485.5 54.25Bldg C northern deck outdoor spkr BCNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 629.62 501.67 54.25
Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 608.57 292.13 54.25
Bldg D northern deck outdoor spkr BDNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 699.5 622.01 54.25Pool Area outdoor speaker PAOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 691.99 573 0.25Pool Area outdoor speaker PAOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 682.7 524.05 0.25Pool Area outdoor speaker PAOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 635.94 508.46 0.25
Bldg D northern deck outdoor spkr BDNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 714 601.5 54.25
Bldg D northern deck outdoor spkr BDNDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 728.76 579.9 54.25Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 631.65 307.28 54.25Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 653.36 323.48 54.25Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 676.09 339.67 54.25
Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 697.11 354.14 54.25
Bldg C southern deck outdoor spkr BCSDOS 78 78 78 Lw HSS 0 0 0 -81.2 0 (none) 0.25 g 718.81 369.3 54.25
Sound Levels (local)
Name ID Type Oktave Spectrum (dB)Source
Weight. 31.5 63 125 250 500 1000 2000 4000 8000 A linRetail A AHU RAAHU Lw A 49 52 64 65 66 63 56 50 45 70.9 89.5 stat-ops-noise-sources_mcs112222Retail B AHU RBAHU Lw A 47 50 62 63 64 61 54 48 43 68.9 87.5 stat-ops-noise-sources_mcs112222Retail C AHU RCAHU Lw A 50 53 65 66 67 64 57 51 46 71.9 90.5 stat-ops-noise-sources_mcs112222
Residential - Lvl 1 AHU R1AHU Lw A 61 64 76 77 78 75 68 62 57 82.9 101.5 stat-ops-noise-sources_mcs112222
Residential - Lvl 2 AHU R2AHU Lw A 62 65 77 78 79 76 69 63 58 83.9 102.5 stat-ops-noise-sources_mcs112222Residential - Lvl 3 AHU R3AHU Lw A 62 65 77 78 79 76 69 63 58 83.9 102.5 stat-ops-noise-sources_mcs112222Residential - Lvl 4 AHU R4AHU Lw A 61 64 76 77 78 75 68 62 57 82.9 101.5 stat-ops-noise-sources_mcs112222Residential - Lvl 5 AHU R5AHU Lw A 61 64 76 77 78 75 68 62 57 82.9 101.5 stat-ops-noise-sources_mcs112222
Retail A AC RAAC Lw 70 73 73 72 74 72 64 61 55 75.5 80.4 stat-ops-noise-sources_mcs112222
Retail B AC RBAC Lw 68 71 71 71 73 71 62 59 53 74.4 79 stat-ops-noise-sources_mcs112222Retail C AC RCAC Lw 70 73 73 72 74 72 64 61 55 75.5 80.4 stat-ops-noise-sources_mcs112222residential 1st floor AC R1AC Lw 79 82 82 80 82 83 74 72 67 85.4 89.5 stat-ops-noise-sources_mcs112222residential 2nd floor AC R2AC Lw 79 82 82 80 82 83 74 72 67 85.4 89.5 stat-ops-noise-sources_mcs112222
residential 3rd floor AC R3AC Lw 79 82 82 80 82 83 74 72 67 85.4 89.5 stat-ops-noise-sources_mcs112222
residential 4th floor AC R4AC Lw 79 82 82 80 82 83 74 72 67 85.4 89.5 stat-ops-noise-sources_mcs112222residential 5th floor AC R5AC Lw 79 82 82 80 82 83 74 72 67 85.4 89.5 stat-ops-noise-sources_mcs112222Haynes speech spectrum HSS Lw -14 -11 -8 -5 -5 -7 -13 -20 -26 -3.2 0.7 Haynes 2006parking movement PM Lw A 75 86 90 89 91 93 93 90 85 99.4 116.9 Nicol and Johnson 2011
stat-ops-CadnaA-results_mcs043023 Dudek Project No. 14814 CadnaA_IO
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix D - Project HVAC Noise Prediction
AHUs (plenum-type return fan only, no condenser units [see separate worksheet]):A-weighting adjustments 26 13 9 3 0 -1 -1 1
Building Minimum Ventilation
average of values for the two fan diameter ranges, per Guyer (Table 12)plug 40 40 38 34 29 23 19 16
average of values for the two fan diameter ranges, per Guyer (Table 12)tube 47 44 46 47 44 45 38 35
per Guyer (Table 12, presumed based on Bies & Hansen ENC)prop 46 48 55 53 52 48 43 38
percent GSF actually occupied (and need ventilation):90
Tag Building GSF Avail. SF Height (ft)Avg. minutes to change air* Volume (ft3)CFM m2 comparable facility function Pressure(iwg)Pressure(Pa) Q (m
3/s)63 125 250 500 1000 2000 4000 8000 OA dB
return air fans in building rooftop AHUs:
Retail A 4800 4320 10 8 43200 5400 402 retail stores 2 500 3 plug 52 64 65 66 63 56 50 45 71
Retail B 3260 2934 10 8 29340 3667.5 273 retail stores 2 500 2 plug 50 62 63 64 61 54 48 43 69
Retail C 5735 5162 10 8 51615 6451.875 480 retail stores 2 500 3 plug 53 65 66 67 64 57 51 46 72
Residential - Lvl 1 51619 46457 8 4 371657 92914.2 4318 residences 2 500 44 plug 64 76 77 78 75 68 62 57 83
Residential - Lvl 2 53627 48264 8 4 386114 96528.6 4486 residences 2 500 46 plug 65 77 78 79 76 69 63 58 83
Residential - Lvl 3 53627 48264 8 4 386114 96528.6 4486 residences 2 500 46 plug 65 77 78 79 76 69 63 58 83
Residential - Lvl 4 50878 45790 8 4 366322 91580.4 4256 residences 2 500 43 plug 64 76 77 78 75 68 62 57 83
Residential - Lvl 5 43652 39287 8 4 314294 78573.6 3652 residences 2 500 37 plug 64 76 77 78 75 68 62 57 83
fan or AHU cabinet liner/interior attenuation (excludes inlet/outlet PWL split, already in calcs above: 2 3 4 5 6 8 10 10
*from 3-10 minute range for "retail stores", 2-5 minute range for "residences" per Loren Cook's "Engineering Cookbook", 1999 edition, p. 41
fantype = plug,
tube, or prop
A-weighted PWL (for CadnaA inputs)
stat-ops-noise-source-CadnaA-inputs_mcs112222 Dudek Project No. 14814 bldg_AHU
CARLSBAD VILLAGE DRIVE MIXED USE PROJECT / NOISE TECHNICAL REPORT Appendix D - Project HVAC Noise Prediction
with or without sound insulation? (enter Y/N): yACCs (air-cooled chillers on rooftops):tons LWA 63 125 250 500 1000 2000 4000 8000 LWA 63 125 250 500 1000 2000 4000 8000 LWA 63 125 250 500 1000 2000 4000 8000Building Interior Comfort Bryant BH16-018 (no sound blanket)1.5 67 66.2 66.2 63.9 63.8 62.3 58.4 56.4 50.3 68 66.2 66.2 63.8 64.1 64.6 59.9 57.7 53.6 67 66.2 66.2 63.9 63.8 62.3 58.4 56.4 50.3
Bryant BH16-024 (no sound blanket) 2 71 65 65 63.7 63.4 68.5 64.7 58.7 52.8 72 63.4 63.4 63.3 63.3 70.4 64.5 59.3 55.5 71 65 65 63.7 63.4 68.5 64.7 58.7 52.8
Bryant BH16-036 (no sound blanket) 3 71 68.2 68.2 66.4 67.5 68.4 59.6 58.2 52.4 72 67.7 67.7 66.8 68.1 69.9 62.8 60.3 55.2 71 68.2 68.2 66.4 67.5 68.4 59.6 58.2 52.4
Bryant BH16-048 (no sound blanket) 4 71 68.4 68.4 67.7 69.7 67.6 59.4 56.4 50 73 67.5 67.5 67.8 70.1 70.6 63.1 58.5 53.3 71 68.4 68.4 67.7 69.7 67.6 59.4 56.4 50
Bryant BH16-060 (no sound blanket) 5 69 63.7 63.7 65.4 67.3 64.9 58.3 56.2 51.9 70 61.7 61.7 65.6 68.1 65.8 59.8 58.4 56.1 69 63.7 63.7 65.4 67.3 64.9 58.3 56.2 51.9Daikin AGZ-E 30 (w/out sound insulation) 30 85 84 84 83 84 77 75 74 70 88 92 91 88 87 83 78 73 68 85 84 84 83 84 77 75 74 70Daikin AGZ-E 40 (w/out sound insulation) 40 85 84 84 83 84 77 75 74 70 89 92 91 90 88 84 79 74 69 85 84 84 83 84 77 75 74 70
Daikin AGZ-E 50 (w/out sound insulation) 50 87 85 85 85 86 80 77 75 70 90 93 93 91 89 85 79 74 69 87 85 85 85 86 80 77 75 70
Daikin AGZ-E 60 (w/out sound insulation) 60 87 85 85 85 86 80 77 75 70 91 94 93 94 89 86 81 76 71 87 85 85 85 86 80 77 75 70
Daikin AGZ-E 70 (w/out sound insulation) 70 87 85 85 85 86 80 77 75 70 92 95 95 94 89 87 81 76 71 87 85 85 85 86 80 77 75 70
Daikin AGZ-E 80 (w/out sound insulation) 80 88 88 85 87 86 81 81 77 71 92 95 95 95 89 87 81 76 71 88 88 85 87 86 81 81 77 71
Daikin AGZ-E 90 (w/out sound insulation) 90 88 88 87 87 86 83 80 77 71 93 94 95 92 91 89 83 81 81 88 88 87 87 86 83 80 77 71
Daikin AGZ-E 120 (w/out sound insulation) 120 89 91 85 88 86 82 81 79 72 95 93 96 92 92 90 84 84 82 89 91 85 88 86 82 81 79 72
Daikin AGZ-E 240 (w/out sound insulation) 241 94 94 88 91 90 91 84 82 75 100 98 98 98 95 96 90 90 86 94 94 88 91 90 91 84 82 75
actual percent of GSF occupied:90
Phase Building Tag GSF Avail. SF comparable facility function
Avg. GSF per
ton* tons of refrig.
Approx. Qty. of
ACCs
tons per
ACC
Approx. Total
PWL (dBA)
63 125 250 500 1000 2000 4000 8000
Retail A 4800 4320 Department Stores - main floor 350 12.3 3 4 76 73 73 72 74 72 64 61 55
Retail B 3260 2934 Department Stores - main floor 350 8.4 2 4 74 71 71 71 73 71 62 59 53
Retail C 5735 5162 Department Stores - main floor 350 14.7 8 2 76 75 75 73 73 71 67 65 59
Residential - Lvl 1 51619 46457 Residential - large 600 77.4 24 3 85 82 82 80 81 82 73 72 66
Residential - Lvl 2 53627 48264 Residential - large 600 80.4 26 3 85 82 82 81 82 83 74 72 67
Residential - Lvl 3 53627 48264 Residential - large 600 80.4 26 3 85 82 82 81 82 83 74 72 67Residential - Lvl 4 50878 45790 Residential - large 600 76.3 25 3 85 82 82 80 81 82 74 72 66Residential - Lvl 5 43652 39287 Residential - large 600 65.5 21 3 84 81 81 80 81 82 73 71 66
*based upon "lo" value per Loren Cook's "Engineering Cookbook", 1999 edition, pp. 59-60
data for models "with sound insulation" or "sound blankets"unweighted PWL (dB) per OCBF (Hz) at full load (100%)
unweighted PWL (dB) per OCBF (Hz) at full load (100%)
data for models "without sound insulation" or no "sound blankets"
stat-ops-noise-source-CadnaA-inputs_mcs112222 Dudek Project No. 14814 bldg_AC