HomeMy WebLinkAboutPUD 16-06; QUARRY CREEK PA R-4B WEST; EXTERIOR NOISE ANALYSIS REPORT; 2015-08-20EXTERIOR NOISE ANALYSIS REPORT
QUARRY CREEK
R-4
Carlsbad, CA
August 20, 2015
Prepared for:
Cornerstone Communities
4365 Executive Drive, Suite 600
San Diego, CA 92121
Prepared by:
dBF Associates, Inc.
3129 Tiger Run Court, Suite 202
Carlsbad, CA 920 lO
619-609-07 l 2
CldBF Associates, Inc. 2015
1.0 Introduction and Summary ................................................................... 1
1.1 Project Description .................................................................................................................. 3
1.2 Noise Background ................................................................................................................... 3
2.0 Applicable Noise Standards ................................................................. 6
2.1 City of Carlsbad ...................................................................................................................... 6
2.2 State of California ................................................................................................................... 6
3.0 Exterior Noise Environment ................................................................. 7
3.1 Roadway Traffic ...................................................................................................................... 7
3.2 Future Noise Envirorunent .................................................................................................... 11
4.0 Findings and Mitigation ..................................................................... 14
4.1 Traffic Noise ......................................................................................................................... 14
5.0 References ......................................................................................... 15
Tables
Table 1. Sound Levels of Typical Noise Sources and Noise Environments ................................................ 5
Table 2. Sound Level Measurements (dBA) ................................................................................................. 9
Table 3. Traffic Counts during Sound Level Measurements ......................................................................... 9
Table 4. Existing Noise Levels (dBA CNEL) ............................................................................................. 10
Table 5. Future SR 78 Noise Levels (dBA CNEL) ..................................................................................... 11
Figures
Figure 1. Vicinity Map .................................................................................................................................. 2
Figure 2. Sound Level Measurement Locations ............................................................................................ 8
Figure 3. Future Exterior Traffic Noise Levels (CNEL) ............................................................................. 13
Appendices
Appendix A. Existing and Future Traffic Volumes
Appendix B. Roadway Noise Calculations
1.0 INTRODUCTION AND SUMMARY
This report estimates the exterior noise environment at the proposed Quarry Creek R-4 single-family/
multi-family residential project in the City of Carlsbad, California (Figure 1). The vacant project site is
south of California State Route (SR) 78, east of El Camino Real, and west of College Boulevard and the
current western terminus of Marron Road.
The primary noise source that would affect the project site is vehicular traffic on SR 78, on the future
planned extension of Marron Road. and on future planned Streets A and B. Future exterior traffic noise
levels on the project site would range from approximately 54 dBA CNEL in the central multi-family
residential area of the project site to approximately 58 dB A CNEL at the northern boundary of the site.
Future exterior traffic noise levels at all outdoor usable areas would be less than 60 dBA CNEL, in
compliance with the Carlsbad requirement of 60 dBA CNEL, as designed.
For residential units where the future exterior traffic noise level would exceed 57 dBA CNEL at a
building fai;ade, mechanical ventilation must be provided to ensure that noise levels within habitable
rooms meet the Carlsbad and California Code of Regulations, Title 24: Noise Insulation Standard
requirement of 45 dBA CNEL or less.
I
Quaff}' Creek R-4 Exterior Noise Analysis
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ocean
Quarry Creek R-4
Master Plan
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Marron Rd
FIGURE 1
Vicinity Map
1.1 PROJECT DESCRIPTION
The Quarry Creek Master Pian (QCMP) is an approximately 155-acre development consisting of 16
planning areas (lots) and including 656 residences, community facilities, and open space in the north
portion of Carlsbad, west of El Camino Real, east of College Boulevard, northeast of Carlsbad Village
Drive, and bounded by SR 78 on the north and the Quarry Creek Plaza commercial center on the east. The
north and east project site property lines are also boundaries between the City of Carlsbad and the City of
Oceanside. The QCMP site is vacant and has generally been graded. The topography generally slopes up
from Buena Vista Creek, bisecting the site and flowing generally east-west
The development plan for Quarry Creek Planning Area R-4 is a 205-unit residential project consisting of
56 detached single-family buildings and 149 multifamily units comprised of 50 duplex units and 99
triplex units. The proposed development would be located on an 18.4-gross-acre parcel in the center of
the QCMP area, bounded on the north and south by future Street A.
Land uses immediately surrounding the R-4 site include: an existing open space area to the northwest
with a single-family residence beyond to the north; a planned wetland preserve and view area to the north
and northeast; a planned community recreation area to the east; a planned open space preserve to the
southeast, south and southwest, with existing single-family residences along Simsbury Court beyond to
the south; and a planned residential neighborhood to the west. Anticipated east-west Street A would
bound the site on the south, anticipated north-south Street B to the west would connect the anticipated
Marron Road extension to Haymar Drive, and anticipated east-west Street D would bound the eastern half
of the site on the north.
The Quarry Creek R-4 development does not include common outdoor usable areas. Private outdoor
usable areas consist of ground-floor yards/ patios adjacent to each multi-family residence and second-
story decks/ balconies associated with some multi-family residences. Required private outdoor usable
areas are considered noise-sensitive; non-required private outdoor usable areas are considered not noise-
sensitive.
1.2 NOISE BACKGROUND
Noise is generally defined as loud, unpleasant, unexpected, or undesired sound typically associated with
human activity and that interferes with or disrupts normal activities. The human environment is
characterized by a certain consistent noise level which varies with each area. This is called ambient noise.
Although exposure to high noise levels has been demonstrated to cause hearing loss, the principal human
response to environmental noise is annoyance. The response of individuals to similar noise events is
diverse and influenced by the type of noise, perceived importance of the noise and its appropriateness in
the setting, time of day and type of activity during which the noise occurs, and sensitivity of the
individual.
Sound is a physical phenomenon consisting of minute vibrations that travel through a medium, such as
air, and are sensed by the human ear. Sound is generally characterized by several variables, including
frequency and intensity. Frequency describes the sound's pitch and is measured in cycles per second, or
hertz (Hz), whereas intensity describes the sound's loudness and is measured in decibels (dB}. Decibels
3
are measured using a logarithmic scale. A sound level of O dB is approximately the threshold of human
hearing and is barely audible under extremely quiet listening conditions. Normal speech has a sound level
of approximately 60 dB. Sound levels above about 120 dB begin to be felt inside the human ear as
discomfort and eventually as pain at still higher levels. The minimum change in the sound level of
individual events that an average human ear can detect is about 3 dB. The average person perceives a
change in sound level of about 10 dB as a doubling ( or halving) of the sound's loudness; this relation
holds true for sounds of any loudness. Sound levels of typical noise sources and environments are
provided in Table 1.
Because of the logarithmic nature of the decibel unit, sound levels cannot be added or subtracted directly
and are somewhat cumbersome to handle mathematically. A simple rule is useful, however, in dealing
with sound levels. If a sound's intensity is doubled, the sound level increases by 3 dB, regardless of the
initial sound level. Thus, for example, 60 dB+ 60 dB= 63 dB, and 80 dB+ 80 dB= 83 dB.
The normal human ear can detect sounds that range in frequency from about 20 Hz to 20,000 Hz.
However, all sounds in this wide range of frequencies are not heard equally well by the human ear, which
is most sensitive to frequencies in the range of 1,000 Hz to 4,000 Hz. This frequency dependence can be
taken into account by applying a correction to each frequency range to approximate the human ear's
sensitivity within each range. This is called A-weighting and is commonly used in measurements of
community environmental noise. The A-weighted sound pressure level (abbreviated as dBA) is the sound
level with the "A-weighting" frequency correction. In practice, the level of a noise source is conveniently
measured using a sound level meter that includes a filter corresponding to the dBA curve.
Because community noise fluctuates over time, a single measure called the Equivalent Sound Level (Leq)
is often used to describe the time-varying character of community noise. The Leq is the energy-averaged
A-weighted sound level during a measured time interval, and is equal to the level of a continuous steady
sound containing the same total acoustical energy over the averaging time period as the actual time-
varying sound. Additionally, it is often desirable to know the acoustic range of the noise source being
measured. This is accomplished through the Lmax and Lmin indicators, which represent the root-mean-
square maximum and minimum noise levels obtained during the measurement interval. The Lmin value
obtained for a particular monitoring location is often called the "acoustic floor" for that location.
To describe the time-varying character of environmental noise, the statistical noise descriptors LIO, L50,
and L90 are commonly used. They are the noise levels equaled or exceeded during 10, 50, and 90 percent
of a stated time, respectively. Sound levels associated with L 10 typically describe transient or short-term
events, whereas levels associated with L90 describe the steady-state (or most prevalent) noise conditions.
Another sound measure known as the Community Noise Equivalent Level (CNEL) is an adjusted average
A-weighted sound level for a 24-hour day. It is calculated by adding a 5-dB adjustment to sound levels
during evening hours (7:00 p.m. to 10:00 p.m.) and a IO-dB adjustment to sound levels during nighttime
hours (10:00 p.m. to 7:00 a.m.). These adjustments compensate for the increased sensitivity to noise
during the typically quieter evening and nighttime hours. The CNEL is used by the State of California and
the City of Carlsbad (City) to evaluate land-use compatibility with regard to noise.
4
Table 1. Sound Levels of Typical Noise Sources and Noise Environments
Human Judgment
Noise Source Noise Environment A-Weighted of Noise Loudness
(at Given Distance) Sound Level (Relative to Reference
Loudness of 70 Declbels1
Military Jet Takeoff Carrier Flight Deck 140 Decibels 128 times as loud with Afterburner (50 ft)
Civil Defense Siren (100 ft) 130 64 limes as loud
Commercial Jet Take-off (200 ft) 120 32 times as loud
Threshold of Pain
Pile Driver (50 ft) Rock Music Concert 110 16 limes as loud Inside Subway Station (New York)
Ambulance Siren (100 ft) 8 times as loud Newspaper Press (5 fl) 100 Very Loud Gas Lawn Mower (3 ft)
Food Blender (3 ft) Boiler Room Propeller Plane Flyover (1,000 ft) Printing Press Plant 90 4 times as loud
Diesel Truck ( 150 fl)
Garbage Disposal (3 fl) Noisy Urban Daytime 80 2 times as loud
Passer(ler Car, 65 mph (25 ft) Reference Loudness Living Room Stereo (15 ft) Commercial Areas 70 Moderately Loud Vacuum Cleaner (1 O ft)
Normal Speech (5 ft) Data Processing Center 60 112 as loud Air Conditioning Unit (100 ft) Department Store
Light Traffic (100 ft) Large Business Office 50 114 as loud Quiet Urban Daytime
Quiet Urban Nighttime 40 1/8 as loud Bird Calls (distant) Quiet
Soft Whisper (5 ft) Library and Bedroom at Night 30 1/16 as loud Quiet Rural Nighttime
Broadcast and Recording Studio 20 1/32 as loud
Just Audible
0 1164 as loud
Threshold of Hearing
Source: Compiled by dBF Associates, Inc.
5
2.0 APPLICABLE NOISE STANDARDS
2.1 CITY OF CARLSBAD
The City of Carlsbad Noise Guidelines Manual [Nolte and Associates, Inc. 1995] identifies noise
standards.
2.1.1 Exterior Noise Levels
Figure IV-1: Land Use Compatibility for Community Noise Environments Matrix defines noise levels up
to 60 dBA CNEL as "Normally Acceptable" at all residential land uses, including single-family, duplex,
mobile home, and multi-family. The City applies this goal at outdoor usable areas.
On Page J-3 of the Manual, the Application Requirements for Noise Report Application states:
Where exterior space above the first floor/story of a residential structure is proposed to be used to
meet the Planned Development (PD) Recreational Space Standards as required pursuant to
Chapter 21.45 of the Carlsbad Municipal Code, the exterior space shall be mitigated to the City
Standard in order to receive credit as recreational space.
2.1.2 Interior Noise Levels
On Page i of the Manual, the Residential Interior Noise Standard states:
Interior noise levels for all residential units shall be mitigated to 45 dB(A) CNEL when openings
to the exterior of the residence are closed. If openings are required to be closed to meet the
interior noise standard then mechanical ventilation shall be provided.
On Page J-4 of the Manual, the Application Requirements for Noise Report Application indicates that
prescriptive transmission/ insertion loss assumptions are 20 dBA when windows are closed, and 12 dBA
when windows are open.
2.2 STATE OF CALIFORNIA
California Code of Regulations, Title 24: Noise Insulation Standards requires an acoustical analysis for
multifamily dwellings located in an area exceeding 60 dBA CNEL. The analysis must show that the
proposed design would limit interior noise in habitable rooms to 45 dB A CNEL or below. This analysis
must be provided to the City's Building Inspection Department.
The interior noise analysis should identify sound transmission loss requirements for building elements
exposed to exterior noise levels exceeding 60 dB A CNEL. If the interior 45 dBA CNEL limit can be
achieved only with the windows closed, the residence design must include mechanical ventilation that
meets applicable California Building Code (CBC) requirements. Worst-case noise levels, either existing
or future, must be used. Future noise level predictions must be for a date at least 10 years from the time of
the building pennit application.
6
3.0 EXTERIOR NOISE ENVIRONMENT
The primary existing noise source near the project is vehicular traffic on SR 78. The centerline of SR 78
is approximately 950 feet north of the closest (north) project site property line.
The project site is exposed to aircraft noise levels below 60 dBA CNEL from operations associated with
McClellan-Palomar Airport [SDCRAA 2011].
3.1 ROADWAY TRAFFIC
SR 78 carries an existing (year 2010) Average Daily Traffic (ADT) volume of 142,800 vehicles between
El Camino Real and College Boulevard {SANDAG 2015]. Near the project site, SR 78 is a two-way six-
lane Freeway roadway with a posted speed limit of 65 miles per hour (mph). SR 78 varies in slope,
generally rising to the east and west from a local low point near Ranch del Oro drive.
Based on classification counts performed during the sound level measurements discussed below, the
existing vehicle mix on SR 78 is estimated to be approximately 97.6% cars, 1.4% medium trucks, 0.6%
heavy trucks, 0% buses, and 0.4% motorcycles. However, the existing vehicle mix on SR 78 is estimated
by Caltrans to be 95.1% cars, 2.3% medium trucks, and 2.6% heavy trucks [Caltrans 2013).
3.1.1 Sound Level Measurements
Sound level measurements were conducted on the project site to quantify the existing onsite acoustical
environment. A Larson-Davis Model 820 American National Standards Institute (ANSI) Type 1
Integrating Sound Level Meter and a RION Model NA-28 ANSI Type I SLM were used as the data-
collection devices. The sound level meters were calibrated before and after the measurement periods.
Simultaneous traffic classification counts were performed during measurements when possible.
The measurements were performed during the afternoon/ evening of Wednesday, July 22, 2015. Short-
term (20-minute) sound level measurements were conducted at three locations during high traffic periods
with free-flow traffic; SR 78 generally slows during peak periods. The meter was mounted on a tripod
roughly 5 feet above ground to simulate the average (ground-floor) height of the human ear, or the
microphone was placed 20 feet above ground to represent a second-story receptor.
Measurement Location I (MLI) was at the northeast comer of the project site, ML2 was at the northwest
comer of the site, and ML3 was near the south edge of the site. ML 1, ML2, and ML3 were at 5 feet above
ground; ML l' and ML2' were at 20 feet above ground. The view of SR 78 from ML3 was not adequate
for an accurate vehicle count; however, traffic was qualitatively observed to be similar to that experienced
duringML2.
A review of Table 2 shows that the measured sound level ranged from approximately 46 dBA Leq at ML3
to approximately 54 dBA Leq at ML 1 '. The measurement results are summarized in Table 2 and
correspond to the locations depicted on Figure 2. Traffic counts during the measurements are reported in
Table 3.
7
FIGURE 2
Sound Level Measurement Locations
Table 2, Sound Level Measurements (dBA)
Measurement Location Date/Time Leq Lmln Lmax L10 L50 L90
ML1 Northeast comer of site, 16:00-16:20 51.9 45.6 66.6 54.0 50.3 48.1 5 feet above ground
ML 1' Northeast comer of site, 16:00-16:20 53.5 47.9 65.5 55.8 52.2 50.1 20 feet above ground
ML2 Northwest comer of site, 17:30 -17:50 50.5 46.9 59.5 51.6 50.0 48.6 5 feet above ground
ML2' Northwest comer of site, 17:30 -17:50 51.4 47.8 58.3 52.8 50.9 49.6 20 feet above ground
ML3 South portion of site, 17:55-18:15 46.3 42.4 55.5 48.0 45.8 43.9 5 feet above ground
Note: All measurements conducted on Wednesday, July 22, 2015.
Table 3. Traffic Counts during Sound Level Measurements
Measurement Duration Roadway DirecUon Cars Medium Heavy Buses Motor-
Trucks Trucks cyctes
Eastbound 879 17 7 0 5
ML1 10 minutes SR78 Westbound 672 9 5 0 4
Eastbound 622 12 4 0 1
ML2 10 minutes SR78
Westbound 655 2 2 0 1
During the measurements, the wind speed varied from approximately 3-8 mph, but did not affect the
sound levels beyond rustling leaves and branches. Other observed noise sources included occasional
distant sirens, occasional propeller aircraft ( distant and high overhead), and occasional distant dogs
barking; however, these sources did not substantially affect the recorded noise levels. Vehicle speeds on
SR 78 appeared to range between approximately 55 mph and 75 mph. In the vicinity of the project site,
SR 78 is elevated above the project site and is superelevated such that the roadway pitch is to the north.
There is generally a clear line of site to the eastbound lanes, but the center Jersey barrier/ K-rail partially
blocks visibility to the westbound lanes.
9
3.1.2 Existing Noise Levels
Because noise prediction models have not been adequately validated for distances beyond 500 feet
[Caltrans 2013], noise levels on the project site were estimated based on adjustments to measured levels.
The loudest traffic noise hour is generally characterized by free-flowing traffic at the highway design
speed (i.e., Level of Service [LOS] C or better) [Caltrans 2015). In Caltrans District 11, it is assumed that
each lane has a maximum capacity of 1,800 vehicles per hour at the design speed of the highway [Ldn
2012]. Assuming that the peak hour traffic volume is 10% of the ADT, this segment of SR 78 would carry
14,280 vehicles during peak hour and operate at LOS Dor worse during peak hour. Therefore, for the
existing six-lane case, the loudest traffic noise hour would correspond to a total peak hour volume of
10,800 vehicles per hour. Agencies such as the U.S. Department of Housing and Urban Development
(HUD) consider the peak-hour Leq to be reasonably equivalent to the CNEL for vehicular traffic.
To estimate existing noise levels on the project site, measured noise levels were increased according to
the difference between the observed traffic volumes and the LOS C peak traffic volumes. The difference
between the observed existing traffic mix and that published by Caltrans is estimated to correspond to a
noise level increase of approximately 1.5 dBA CNEL; this factor was added to the existing noise levels. A
review of Table 4 shows that existing noise levels on the project site would range from approximately 49
dBA CNEL in the south area to approximately 56 dBA CNEL at the northeast comer (20 feet above
ground).
Table 4. Existing Noise Levels (dBA CNEL)
Observed Existing Observed-Measured Hourty Hourly to-Existing Traffic Mix Existing
Location Noise Traffic Traffic NolH
Level Volume Volume Traffic Noise Noise Increase Level
(vehicles) (vehicles) Increase
ML1 Northeast comer of site, 51.9 9.588 5 feet above ground 10,800 +0.5 + 1.5 53.9
ML1' Northeast comer of site, 53.5 9,588 20 feet above ground 10,800 + 0.5 + 1.5 55.5
ML2 Northwest comer of site, 50.5 7,794 10,800 + 1.4 + 1.5 53.4 5 feet above ground
ML2' Northwest comer of site, 51.4 7,794 10,800 + 1.4 + 1.5 54.3 20 feet above ground
ML3 South portion of site, 46.3 -7.800 5 feet above ground 10,800 + 1.4 + 1.5 49.2
lO
3.2 FUTURE NOISE ENVIRONMENT
The primary noise source in the future would be vehicular traffic on SR 78, on the planned extension of
Marron Road, and on planned Streets A, B, and D.
Improvements to add two high-occupancy vehicle (HOV} lanes to SR 78 have been included in the
SANDAG Year 2050 Regional Transportation Plan [Urban Systems Associates 2012]. An interchange
with Rancho del Oro Road is also planned. SR 78 is projected to carry a Buildout Alternative 1 ADT
volume of 177,500 vehicles between Rancho de! Oro Road and College Boulevard [Urban Systems
Associates 2012]. Using LOS C, for the future eight-lane case, the loudest traffic noise hour would
correspond to a total peak hour volume of 14,400 vehicles per hour.
Because noise prediction models have not been adequately validated for distances beyond 500 feet
[Caltrans 2013], future SR 78 noise levels on the project site were estimated based on adjustments to
existing levels. To estimate future SR 78 noise levels on the project site, existing noise levels were
increased according to the difference between the existing LOS C peak traffic volumes and the future
LOS C peak traffic volumes. A review of Table 5 shows that future SR 78 noise levels on the project site
would range from approximately 54 dBA CNEL at the southeast comer to approximately 56 dBA CNEL
at the northwest comer.
Table S. Future SR 78 Noise Levels (dBA CNEL)
Existing Future Existing-Existing Hourly Hourly Future
Location Noise Traffic Traffic to-Future Noise
Level Volume Volume Traffic Noise Level
(vehicles) (vehicles) Increase
ML1 Northeast comer of site, 53.9 10,800 14,400 + 1.2 55.1 5 feet above ground
ML1' Northeast comer of site, 55.5 10,800 14,400 + 1.2 56.7 20 feet above ground
ML2 Northwest comer of site, 53.4 10,800 14,400 + 1.2 54.6 5 feet above ground
ML2' Northwest comer of site, 54.3 10,800 14,400 + 1.2 55.5 20 feet above ground
ML3 South portion of site, 49.2 10,800 14,400 +1.2 50.4 5 feet above ground
The Federal Highway Administration's (FHWA) Traffic Noise Model (TNM) version 2.5 was used to
calculate future traffic noise levels from Marron Road and Streets A, B, and D. The modeling effort
considered roadway alignments, estimated average vehicle speed, peak-hour traffic volume, and vehicle
mix. The default ground type used in the model was 'hard soil.' Because Marron Road and Streets A, B,
and D do not currently exist, calibration of the roadway noise model was not possible.
11
Marron Road is expected to extend west from the QCMP east boundary to the QCMP west boundary as
part of the QCMP project; however, Marron Road is not expected to continue west to connect to the
western existing portion of Marron Road. In the TIA, Buildout Alternative I "assumes the extension of
Marron Road from the existing east end of the Quarry Creek Shopping Center property line, to the
existing west end approximately 1,000 feet east of El Camino Real in the City of Carlsbad." [Urban
Systems Associates 2012] Buildout Alternative 2 includes "the deletion of Marron Road between the
QCMP west boundary and the existing extension east of El Camino Real." [Urban Systems Associates
2012] "The project preferred alternative is Alternative 2 which does not assume the Marron Road
extension through the open space area." [Urban Systems Associates 2012]. The projected P.M. peak hour
volumes are higher than the A.M. peak-hour volumes [Urban Systems Associates 2012]. Buildout
Alternative 2 P .M. peak hour traffic volumes were used in the noise model.
Marron Road is projected to carry a Buildout Alternative 2 P.M. peak-hour volume of 307 vehicles
between the QCMP east boundary and Street B, and 109 vehicles between Street Band the QCMP west
boundary [Urban Systems Associates 2012]. The extension would be a four-lane Secondary Arterial
roadway; the speed limit was assumed to be 35 mph, the posted speed limit on each connection segment.
Marron Road is not expected to be a truck route; therefore, the traffic mix was assumed to be the City of
Carlsbad non-truck-route average of 97 .89% cars, 1.83% medium trucks, and 0.28% heavy trucks.
Street A is expected to extend west from the end of the Marron Road west extension and continue along
the southeast/ south/ southwest edges of R-4. Street A is projected to carry a Buildout Alternative 2 P.M.
peak-hour volume of 109 vehicles. Street A is expected to be a Local Collector roadway with a speed
limit of 30 mph. Street A is not expected to be a truck route; therefore, the traffic mix was assumed to be
the City of Carlsbad non-truck-route average of 97 .89% cars, 1.83% medium trucks, and 0.28% heavy
trucks.
Street 8 is expected to extend north from the end of the Marron Road west extension to Haymar Drive.
Street 8 is projected to carry a Buildout Alternative 2 P.M. peak-hour volume of296 vehicles between
Marron Road and Haymar Drive. Street 8 is expected to be a Local Collector roadway with a speed limit
of 30 mph. Street 8 is not expected to be a truck route; therefore, the traffic mix was assumed to be the
City of Carlsbad non-truck-route average of 97.89% cars, 1.83% medium trucks, and 0.28% heavy trucks.
Street D is expected to extend west from an intersection with Street B, north of the Marron Road west
extension, along the north edge ofR-4. Street Dis projected to carry a Buildout Alternative 2 P.M. peak-
hour volume of 109 vehicles. Street Dis expected to be a Local Collector roadway with a speed limit of
30 mph. Street D is not expected to be a truck route; therefore, the traffic mix was assumed to be the City
of Carlsbad non-truck-route average of 97.89% cars, 1.83% medium trucks, and 0.28% heavy trucks.
The project grading and building layout used in the roadway noise model were imported from the site
plan [SB&O 2015]. Ground-floor receivers were placed at a height of 5 feet above local ground to
simulate the average height of a standing person.
Future exterior traffic noise levels would range from approximately 54 dBA CNEL in the central multi-
family residential area of the project site to approximately 58 dB A CNEL at the northern boundary of the
project site, as shown on Figure 3. Future exterior traffic noise levels at all outdoor usable areas would be
less than 60 dBA CNEL.
12
4.0 FINDINGS AND MITIGATION
4.1 TRAFFIC NOISE
4.1.1 Exte~or
Future exterior traffic noise levels at all outdoor usable areas would be less than 60 dBA CNEL, in
compliance with the Carlsbad requirement of 60 dBA CNEL, as designed.
4.1.2 Interior
The City of Carlsbad Noise Guidelines Manual indicates that standard construction provides 20 dBA
exterior-to-interior noise reduction with windows closed, and 12 dBA with windows closed. Because
future exterior traffic noise levels at all project building fayades would be 60 dB A CNEL or less, interior
noise levels with windows closed are expected to be less than 45 dBA CNEL.
Where future exterior noise levels exceed 57 dB A CNEL, interior noise levels with windows open would
exceed 45 dBA CNEL. Because windows would need to be closed to meet the interior noise standard,
mechanical ventilation must be provided.
For residential units where the future exterior traffic noise level would exceed 57 dBA CNEL at a
building fayade, mechanical ventilation must be provided to ensure that noise levels within habitable
rooms meet the Carlsbad and California Code of Regulations, Title 24: Noise Insulation Standard
requirement of 45 dBA CNEL or less.
14
5.0 REFERENCES
State of California Department of Transportation (Caltrans). 2013. Division of Traffic Operations, Office
of Performance. Traffic Data Branch. 2013 Annual Average Daily Truck Traffic on the California
State Highway System.
2013b. Division of Environmental Analysis. Environmental Engineering. Technical Noise
Supplement (TeNS) to the Traffic Noise Protocol. September.
Federal Highway Administration (FHWA). 2004. Traffic Noise Model, Version 2.5. February.
Harris, Cyril M. 1998. Handbook of Acoustical Measurements and Noise Control, Third Edition.
Acoustical Society of America. Woodbury, NY.
International Organization for Standardization (ISO). 1996a. ISO 1996/1. Acoustics -Description and
Measurement of Environmental Noise -Part 1: Basic Quantities and Procedures.
1996b. ISO 1996-2. Acoustics -Description and Measurement of Environmental Noise -Part 2:
Acquisition of Data Pertinent to Land Use.
1996c. ISO 1996-3. Acoustics -Description and Measurement of Environmental Noise -Part 3:
Application to Noise Limits.
Ldn Consulting, Inc. 2012. Noise and Vibration Study. Quarry Creek Master Plan. October 3.
Nolte and Associates, Inc. 1995. City of Carlsbad Noise Guidelines Manual. September.
SB&O. 2015. Quarry Creek R-4 Site Plan. June 28.
San Diego Association of Governments (SANDAG). 2015. Average Weekday Traffic Volumes-State
Freeways (Caltrans).
San Diego County Regional Airport Authority (SDCRAA). 201 l. McClellan-Palomar Airport Land Use
Compatibility Plan. December 1.
State of California. 1988. California Noise Insulation Standards, State Building Code, Part 2, Title 24,
California Code of Regulations, Appendix Chapter 35 Sound Transmission Control. California
Department of Health Services, Sacramento, CA.
Urban Systems Associates. 2012. Traffic Impact Analysis for Quarry Creek Master Plan. Final Report.
October 5.
15
APPENDICES
APPENDIX A
ROADWAY NOISE CALCULATIONS
INPUT· ROADWAYS 'lrtyCreek RC◄~---------,-7
dBf AMoclates, Inc.
SPF
INPlJT: ROADWAYS
PROJECT/CONTRACT:
RUN:
Points
•••
27 July 2015
TNM2.5
Averqe pavllfflllnt type shall bfl used unless
■ Staie hlghw■y ■geney ■ubstflnti■te■ the UH
of ■ different type with t,,e ■pprov■I of FHWA
COOrdln■tN (p■.vement) I _ Flow Control Segment rx y -iz--~~c~~ ... -c~.---
i D■vlce Constraint -Typo
Oo
Sm,ot?
ft ft ft ft mph
Street A 50.0 polnl13 13 6,23i:868.0 2,009,251.0 124.00 Average
1----·· ----·· poinl14 14 6,237,967,5 2,009,137.9 126.00
polnt15 -+-~,a15 -·6-,2-,-,-,oa-1:s 2,009,067.:2~: 12a::ool----·-'"
~~_Hi --~-~,238,214.0 _ 2,009.006:~ 130.0~1----
point17 17 6,238,390.0 2,008,922.8 130.00
~-Awrage
---~
A-,e
-----A-
A-
point18 18 6,238,518.5 2,008,894.2! 128.00 Average
point19 ··19 6,238~65o.Q -2,008,903.4 • 126.00 -------·-AViirage
----------+----ll'""~"-""°c--+---;20 s,238,776.s 2.ooa,942.a 124_00 ~---po1nt21 21 6,238,887.0 2,009,011.6 1"22~.oo.,;----i------t-----t~ A-
Average
StreetB
point22
poinl23
36.0 polnt46
polnt47
22
23
" 25
26
27
28
28
30
46
47 ..
6,238,966.5 2,009,117.2
6,239,045.5 2,009,223.0
6,239,125.0 2,009,328.8
6,239,204.5 2,009,434.5
6,239,290.5 2,009,534.9
6,239,386.5 2,009,625.9
6,239,589.5 2,009,769.0
6,239,693.5 2,009,822.1
6,239,785.0 2,009,859.8'
6,239,342.0 2,011,117.8
6,239,354.0 2.011,042.9
6,239,367.5 _ poln148 -··---·-----------+----tc.,=10"14"9-t-~slc===.t-c 2,010,996.5,
49 6,239,383.0 2,010,954.0:
polnt50 50 6,239,398.5 2,010,911.41
polnt51 51 6,239,414.5 2,010,868.91
52 6,239,430.0 W10,826.41
C:IU■ers\Steve Fledler\Dropbox\dBFA TNM\Quarry Creek R-4\Futuni
120.00 Average
118.00 Average
116.00 Average
114.00 A'""11•
112.00 A-
110.00 Awrage
110.00 Awrage
112.00 Average
114.00
128.00 A-go
126.00 A-
124.00 Aw,.,.
122.00 Average
120.00 Average
118.00 Awrage
116.00 Average
-
·----
--
INPUT· ROADWAYS 1rry Creek R-4 ----Jinl53 ,....--~ 6.239,445.5 2,010.183.91 Average 114.00 ----
' """'" 54 6,239,461.0 2,010,741.41 112.00 Average .---point55-~55 -6,239,476.5 2,010,698.91 110.00 A=go ·---,..,,,. 56 6.239,492.5 2,010,656.41 108.00 Awrago ---poinl57 " 6,239,510.0 2,010,607.8', 106.00 Average
""""' 58 6,239,557.5 2,010,499.2· 104.00 A-ge --"""'''' 59 6,239,690.5 2,010,117.5 1oaoo Aw-------poin\60 6.239,727,0 2,010,017.6 110.00
..
'Average 60
' point61 61 6,239,757.5 2,009,934.4; 112.00 Average ----.. · -------point62 62 6,239,785.0 2,009,859.8 114.00
Marron Road 50.0 poinl63 63 6,239,785.0 2,009.859.8 114.00 Average
poirlt32 --32 6.239,853.0 2,009,882.6 116.00 A,"""
poin133 33 6,239,905.5 2,009,897.51 118.00 Awrago ·---point34 " 6,239,956.0 2.009,910.0:' 120.00 Awrago
point35 35 8,240.011.0 2.009,920.4 122.00 Average ·---·---point36 36 a:240,065.0 2,009,928.51 124.00 Average -
' point37 37 6,240,118.5 2,009.934.4 126.00 Aw,_ I---· ----· -------·· --·---~ . ---, f------·-~-------
""""' 38 6.240,172.5 2.009,938.1 128.00 Aw-
poinl39 39 6,240.227.0 2.009,939.5 130.00 , Average ·---. ·------. ----·· ----2,009,939.0 -+--·--
""""' 40 6,240,281.0 132.00 Average
polnW1 41 6.240,335.5 2,009,938.5 134.00 A-~----· ,-----------··-, point42 6,240,389.5 2,009,937.9 -136.00 --·-···-----···· A-ago 42
polnl43 43 6,240,443.5 2,009,937.2 138.00 Average ----·--------140~00 point44 44 6.240,512.0 2,009,936.5 Average
"""'" " 6,240.643.5 2,009,935.1 142.00
Street 6---. ·--···------12.0 """"' 6,239,666.o 108.00 -----· A-go 64 2,010,046.2
point65 85 6,239,546.5 2.010,003.1 106.00 A-go -------.. --.. ---.. ---~-· I------'-... -e-----··-~ .. --~-----~ t-··-point66 66 6,239,311.0 2,009.952.8 106.00
point67 67 6.239,212.0 2,009,954.1 106.00 Average ~----·---·------·----·c--c--~-.. --·,-:--~··---, -106.00 -------------1-c-----'-... ---poin\68 68 6,239,097.5 2.009,950.2 Average
"""'" ,, 6,238,950.0 2,009,941.8 106.00 Average ~----------· ·------·point70 • 70 -· '2,009,917.4 ~-50
--~··----6.238,686.0 Aw-~ ---·-------· ----polnt71 71 6,238,648.5 2,009,68i"o ~i.00 i-----------~ : Average
-
point72 72 6,238,792.5 2,009,603.6 108.00 Average
~· ---· -------. ---. --. point73 73 "6,238,725.5 2,009,685.9 109.50 -~· ------Average
point74 74 6,238,695.5 2,009,644.4 110.00 A-... 1------------------·------... ---2,009,571.9 .. 1----.. ----·· ... -polnl75 " 6,238,609.5 115.00 Average
point~6 76 6,238,575.5 2,009,513.6 117.50 Average ··----------------·----poinl77 77 6,238,563.5 2.009,455.Bi 120.00 ----A_.,.
C:\Users\Sleve FledlerlDropbox\dBFA TNM\Qu1rry Cntek R-4\FuluN 2
any Creek R-4 INPUT: ROADW=AY~S~ _______ _ L.----________ L_ __ _,oint78 I ___ 781 6,238,561.5/ 2,009,39='·='L/ --'"~'=·'cc''----'-----'-----'----'--
C:\Uaen\Steve Fledi.r\Dropbox\d8FA TNM\Quany Cntek R-4\Futura 3
INPUT· TRAFFIC FOR L.Aeq1h Volumes ,. __ Qua~ ----7
dBF Anociates, Inc. 27 July 2015 ... TNM2.5
INPUT; TRAFFIC FOR L.Aeq1h Volumes
PROJECT/CONTRACT: Quarry Creek R-4
RUN: Future
Roedway Points ··--------·· -~ ---------··-Name No. Segment
Autos MTrucks HTrucks Buses Motorcycles
i V s V s V s V is V s ' vehlhr mph vehlhr mph vehlhr mph "8hlh, mph vehfhr mph -Street A poinl13 13 107 35 2 35 0 0 0 0 0 0
point14 14 107 35 2 35 0 0 o' 0 0 0
point15 15 107 35 2 35 0 0 0 0 0 0 -point16 16 107 35 2 35 0 0 0 0 0 0
point17 17 107 35 2 35 0 0 0 0 0 0 f---· polnt18 18 107 35 2 35 0 0, 0 0 0 0 f----point19 19 107 35 2 35 0 o· 0 o, 0
polnt20 20 107 35 2 35 0 0 0 0 0 0
point21 21 107 35 2 35 0 0 0 0 0 0 f-----point22 22 107 35 2 35 0 0 0 0 0 0
point23 23 107 35 2 35 0 0 0 0 0 0
point24 24 107 35 2 35 0 0 0 0 0 0
""'""5 25 107 35 2 35 0 0 0 0 0 0 -point26 26 107 35 2 35 0 0 0 0 0 0
point27 27 107 35 2 35 0 0 O, 0 0 0 -107 0 0 0 point28 28 35 2 35 0 0 0
point29 29 107 35 2 35 0 0 0 0 0 0 -point30 30
Stre&t B polnt46 46 290 30 5 30 1 30 0 0 0 0 f-----polnt47 47 290 30 5 30 1 30 0 0 0 0
polnt48 48 290 30 5 30 1 30 o, 0 0 0
poinl49 49 290 30 5 30 1 30 0, 0 0 0
poln150 50 290 30 5 30 1 30 0 0 0 0
C:\Users\Steve Fledler\Dropbox\dBFA TNM\Quarry Creek R-4\Future 1
INPUT: TRAFFIC FOR l.Aeq1h Volumes~=~ Qua-· Cre -4
polot~. 51 290 30 5 30 1 30 0 0 0' 0 ~--------------ll"-~--+--'-+-=+-c+--+-=1----+-~+---'-+--+--+-_:-polnt52 52 290 30 5 30 1 30 0 0 0 0
point53 53 290 30 5 30 1 30 0 0: 0 0 f-----------------tr~= ---t-~t-~cc+ -=f---eel-~+ 1 O•
r-point54 54 290 -~"+--c'+--=" --+-,'°3---,'+--+--'-'1--_ _:_0 ~ -----------++''°~;m55_c __ +--~','+--','°+-'c'+ -~'+--'°'+--'+ --'-'°+--'a· __ o, __ ~o_,_ _ _a point56 5629030 530 130 00 00 ~-----------------lt'---ccc--+-ccf--c+--+--+-ccl-----,t--+---+--ct------polnt57 57 290 30 5 30 1 30 0 0 0 0 --itcpo=;""t58~--,-c,.+--,coo=f--c30st---,c1---,c,c1--,+-303----~,+--c,I---,+-_.,
poinl59 59 290 30 5 30 1 30 0j 0 0 0 ----trpol-"\60----+-C,0+--,~90+-30ccl----,+~31)+--,+-030+-~,+--,+---'-,1--~Q
point61 61 290 30 5 30 1 30 O O O 0
point62 62
Marroo Road polnl63 63 300 35 6 35 35; 0 0 0 0
35 0 0 0 0 polnt32 32 300 35 6 35
--------+polnt33 33 300 35 6 35 35 0 0 0 0
~
1------
polnt34 34 300 35 6 35 35 0 0 0 0
point35 35 300 35 6 35 1 35 O· O· 0 0 ---H-----------+------------+-----------+------.. --polnt36 36 300 35 6 35 1 35 0 0 0 0
polnt37--37 300 ·-35+--· -c6f-35+----1· 1--3c5cl---~,+--i/-o --{)
f-----------------------tl-':c'cic---+-~~~ct-~t---cl---C:cf---+---cci--➔-+----ci--; point38 3830035 635 135 00 00 ~-------------11-'-----1-~+--=+--'-+--+-=+----+-=t---'-l--+--~+---"I point39 39 300 35 6 35 1 35 O!_ 0 0 0
r-::--:----------Street D ~-----
point40 40 300 35 6 35 1 35 O O O O
point41 41 300 35 6 35 1 35 0 0 0 0
point42 42 300 35 6 35 1 35 O O O O
point43 43 300 35 6 35 1 35 O O O O
-_-_::_:: __ : ----:-= ,+--~_nt44_____ 44 300 35 --6 -~~= -_J:=-_35c1-_----c,o --_,~~--;,+_-_-_---i'o'
polnt45 --,c,t---t-------
~+--1---0----l-------·--+----+----1---I---+-----1 poinl64 64 107 35 2 35 0 0 0 0 0 0 ----------4,-~---+ -~+---"-I-~-, ---=t---~t---+---+---+--'1-----"I poinl65 65 107 35 2 35 0 O O O O O
point66 66 107 35 2 35 0 0 O! O! 0 O
polnt67 6710735 235 00 00 00
point68 68 107 35 2 35 0 0 0 0 0 0
point69 6910 .,c'cr--'c'l-----c,' _03~51-----c'l--':+--~'}--~O+---~'--'I'
t----------------------j-t--polc"c'c70--+-,co+--,,,c'1-~"•r------"l2 --~51-0 0 ~' 0 -'+-'
~-----_ _::_::_:: __ ---_-_-_-_ _::_::_::_::_-__ ~ ~~;1-----}!>-----~~;~~ ---~ --1:~---~ ~e---~;---~'-----~ --0
--------------,_____ ----·-----· -'--.. --'----~-'
C;\Users\Steve Fledler\Dropbox\dBFA TNM\Quarry Creek R-4\Future 2
INPUT· TRAFFIC FOR l.Aeq1h Volumes = -.
0 point,~ 73 107 35 2 35 0 0 0 0 0
QuanvCl'f. ..
polnl74 74 107 35 2 35 0 0 0 0 Oi 0
polnt75 75 107 35 2 35 0 0 0 0 0 0
polnt76 76 107 35 2 35 0 0 0 0 0 0
polnt77 77 107 35 2 35 0 0 o, 0 0 0 ·~ polnt78 78
C;\Users\Steve Fledler\Dropbox\dBFA TNM\Quarry Creek R-4\Future 3
INPUT: RECEIVERS r=,==~~~---------
dBF Anociates, lne.
SPF
INPUT: RECEIVERS
PROJECT/CONTRACT:
RUN:
Reeelvar
Quarry Creek R-4 , .... ~
27 July 2015
TNM2.5
Quarry Creek R-4
Name No. #DU• Coordlnatn (ground) Height Input Sound Level• and Criteria Adlw
'" 1c.1c.
i
Ground LAeq1h lAeq1h ISub'I )Goal
X 1v ±~-above ExkltlnU lmpaet Criteria [iiR-
~ ft ft --1,,~--+,cBA~--+,c8cA~-f,c.8~----+,c.8~--I
MF46 MF19 ----
1 6,238,884.5 2,009,444.2 126.40 5.00 0.00 66 10.01 ------~ --+---+ ------,+--~ .0--~st---ccf 24 1 6,238.645.5 2,006,954.8 128.00 5.00 0.00 66 10.0
23 8.0
8.0 t,Jf5/617 --------~t--~-~ct---ccct-~ccct---=f--=ct---~t---·---25 1 6,239,292.5 2,009,616.1 120.00 5.00 0.00 66 10.0 8.0
MF 3 / 4
MF 32
38
27
17
10 ----
26 1 6,239,423.5 2,009,837.0 118.50 5.00 0.00 66 10.0 8.0
27 1 6,238,932.5 2,009,889.6 120.10 5.00 0.00 66 10.0 8.0
28 1 6,237,970.0 2,009,204.1 127.70 5.00 0.00 66 10.0 8.0
-~~=e----29 -----, ·6,238,458.Sr-~!_OOB_,9_5_7.2 131.30 --,-.oo, __ 000.0000 ---55-··· _100.0+----_-_-8.~0_-_-_-_--,
30 1 6,238,504.5 2,009,429.2 128.10 5.00 0.00 66 10.0 8.0 +-~cct--~-cct----c+---~+-~--+------J 1 6,238,212.0 2,009,385.6 130.20 5.00 0.00 66 10.0 8.0 31
32 1 6,237,872.0 2,009,377.6 125.60 5.00 0.00 66 10.0 8.0
C:\U.ers\Stave Fledlar\Dropbox\dBFA TNM\Quarry Craak R-4\Futura
,
. RESULTS: SOUND LEVELS Quany Cl'Nk -------
' dBF Associates, Inc. 27 July 2015
SPF TNM 2.5
Calculated with TNM 2.5 I I
RESULTS: SOUND LEVELS
PROJECT/CONTRACT: Quarry C..ak R◄
RUN: , .... ~
BARRIER DESIGN: INPUT HEIGHTS A.V91'1191' IM'ffRM!nl type shall be UMd unleu
a State highway agency aubstantlatn tha use
ATMOSPHERICS: 68 c!911 F, 50% RH of a dlffef9m type with apprOYIII of FHWA . ...... ~ 7· IOUa !Existing INo-Bllffie~------------·----·-----------No= _.,_
,!L.Aeq1h """ lncreau over u1,t1ng Ty,-le,...-NolH Reduction
I lca1cu1ated
.. ,_ ----Crif, :calculated Crtrn lmpa,;t LA,q1h Calcullmod I_Goal C.k:ulated
I I Sub'I Inc ' mlnu• ' ' I ... ,
ldBA d8A dBA dB dB dBA dB dB dB
MF46 " ,, 0.0 .,._, 66 48.8 10 --48.8 0.0 8 -a.o
MF 19 --------------r---• --·54.7 -------~-
" 0.0 '4.7 10 -'4.7 0.0 8 -ao
MF5/6/7 " ' o:O "-' "-' 10 "' o.o 8 -a.o
MF314 " 1' 0.0 "-' "-' 10 "' 00 8 -8.0
MF 32 27 ' 0.0 "' " "·' 10 -"-' 0.0 8 -a.o
38 28 ' o.o 55.0 66 55.0 10 -55.0 0.0 8 -a.o
27 29 ,, 0,0 S47 66 S47 10 -S4.7 0.0 8 -a.o ~ -17 30 ,, 0.0 52.2 66 52.2 10 -"·' 0.0 8 -8.0 ~
--11-
10 31 0.0 45.6 86 45.6 10 ---"· 00 8 -ao 1-----------------------------~-----w --+---------
' 32 0.0 .... o 86 46.0 ---46.0 0,0 8 -a.o
0-lllng Units I ' DUa NolN Reduction 1:;~ 1:: 1:: ~·-10! 0.0 0.0 0,0
All lmpaelfld o: 0.0 0.0 0,0
All that meet"NR Goal -°' 0.0 0.0 0,0
C:\Users\StaVfl Fledle!\Dropbox\dBFA TNM\Quury Cl'Nk R-4\Futur. '"'