HomeMy WebLinkAbout2012-07-17 Planning Board Supplemental Materials (50)Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346 i
Environmental Noise Assessment Report
Prepared for:
3401 International Airport
Drive
Suite #500
Charlotte, NC 28208
Site No. BS54XC860-A
723 Osgood Street
North Andover, Massachusetts
EBI Project No. 62121701
July 16, 2012
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346 ii
TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY .................................................................................................................... 3
2.0 BACKGROUND ................................................................................................................................ 3
3.0 REGULATORY REQUIREMENTS ........................................................................................................ 5
4.0 SITE DESCRIPTION .......................................................................................................................... 5
5.0 AMBIENT SOUND LEVEL MEASUREMENTS ...................................................................................... 7
6.0 RESULTS AND CONCLUSIONS ........................................................................................................ 8
7.0 LIMITATIONS ................................................................................................................................... 9
8.0 REVIEWER CERTIFICATION ............................................................................................................. 9
APPENDICES
Appendix A Sound Monitoring Data & Notes
Appendix B EBI – Environmental Noise Monitoring Results
Appendix C Equipment Specifications
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
1.0 EXECUTIVE SUMMARY
Sprint/Ericsson currently operates an unstaffed wireless telecommunications facility at the site
BS54XC860-A. This site is located in a wooded area, adjacent to the Steven’s Estate Property at 723
Osgood Street, North Andover, Massachusetts, and is herein referred to as 723 Osgood Street.
A study of the noise effects from the existing equipment enclosure on nearby areas was performed by
EBI Consulting. Existing sound levels at the security barrier and the nearest property line (Osgood
Road) were measured on June 21, 2012 and July 16, 2012. This report evaluates the existing sound
levels at the 723 Osgood Street site for annual Special Permit renewal requirements.
2.0 BACKGROUND
All sounds originate from a source. The sound energy, produced by a source, creates variations in air
pressure which travel in all directions much like a wave ripples across the water. The “loudness” or
intensity of a sound depends on the sound pressure level, defined as the ratio of two pressures: the
measured sound pressure from the source divided by a reference pressure (i.e. threshold of human
hearing). The most common approach to sound level measurement is to use the decibel (dB) scale.
The decibel scale is logarithmic to accommodate the wide range of sound intensities the human ear is
capable of responding to. On this scale, the threshold of human hearing is equal to 0 dB, while levels
above 140 dB can cause immediate hearing damage.
One property of the decibel scale is that the combined sound pressure level of separate sound sources
is not simply the sum of the contributing sources. For example, if the sound of one source of 70 dB is
added to another source of 70 dB, the total is only 73 dB, not a doubling to 140 dB. In terms of human
perception of sound, a 3 dB difference is the minimum perceptible change for broadband sounds (i.e.
sounds that include all frequencies). A difference of 10 dB represents a perceived halving or doubling of
loudness.
Environmental sound is commonly expressed in terms of the A-weighted sound level (dBA). The A-
weighting is a standard filter to make measured sound levels more nearly approximate the frequency
response of the human ear. Table 1 shows the adjustments made at each octave band frequency to
contour un-weighted sound levels (dB) to A-weighted sound levels (dBA).
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
TABLE 1 - A-WEIGHTED OCTAVE BAND ADJUSTMENT (±dB)
Octave Band
Center
Frequency
(Hz)
32 64 125 250 500 1000 2000 4000 8000 16000
A-weighting
Adjustment
(±dB)
-39.4 -26.2 -16.1 -8.6 -3.6 0.0 +1.2 +1.0 -1.1 -6.6
Environmental sound varies from moment to moment. Some sounds are sharp impulses lasting a very
short time, while others rise and fall over much longer periods of time. There are various measures
(metrics) of sound pressure designed for different purposes. The Leq, or equivalent sound level, is the
steady-state sound level over a period of time that has the same acoustic energy as the fluctuating sound
that actually occurred during that same time. The Leq is commonly referred to as the average sound
level and is calculated automatically by the sound level meter using methods defined in ANSI S1.4-19831.
1 American National Standards Institute, ANSI S1-4-1983, American National Standard Specification for Sound
Level Meters, 1983
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
3.0 REGULATORY REQUIREMENTS
Town of North Andover
The Town of North Andover Zoning Bylaw, describes Special Permit standards and noise level limits
produced by wireless telecommunications facilities. According to Section 8.9 (e) (iv) of the bylaw, titled
Wireless Service Facilities Environmental Standards, Ground-mounted equipment for wireless service
facilities shall not generate acoustic noise in excess of 50 dB at the security barrier where noise is
produced. The ordinance regulates the sound generated by the proposed project, independent of other
contributing noise sources.
4.0 SITE DESCRIPTION
The site BS54XC860-A is located in a wooded area adjacent ot the Steven’s Estate at 723 Osgood
Street, North Andover, Massachusetts. The site consists of a monopole with several other carriers
operating telecommunications installations at the time of the site visits. Figure 1 presents the
monitoring locations, property line and nearest residential property. According to aerial photographs,
the nearest private residential structure is 180 Prescott Street, approximately 1,000 feet south-
southwest of the compound.
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
Monitoring
Location 1 Project Site
Monitoring
Location 2
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
5.0 AMBIENT SOUND LEVEL MEASUREMENTS
Short-term (20 minute) sound monitoring, day and night, was performed in the area surrounding the
proposed location on June 21, 2012 and July 16, 2012. See Figure 1. Nighttime measurements were
taken between 0200 and 0320 and daytime measurements were taken between 1320 and 1410. The
property line measurement (Loc-1) was taken outside the security barrier, with the door open (night)
and closed (day). The nearest residence measurement (Loc-2) was made at the entrance to 723
Osgood Street. The average measured sound levels (Leq) varied from 69.7 dB to 64.8 dB during
daytime hours and from 61.1 dB to 68.3 dB during nighttime hours.
All sound level measurements were taken with a Casella CEL-63X real-time octave-band sound level
analyzer, which was equipped with a precision condenser microphone having an operating range of 5 dB
to 140 dB, and an overall frequency range of 3.5 to 20,000 Hz. The meter meets or exceeds all
requirements set forth in the American National Standards Institute (ANSI) Standards for Type 1 for
quality and accuracy. Prior to and immediately following both measurement sessions, the sound
analyzer was calibrated (no level adjustment was required) with an ANSI Type 1 calibrator, which has an
accuracy traceable to the National Institute of Standards and Technology (NIST). All instrumentation
was laboratory calibrated per ANSI recommendations. For all measurement sessions the microphone
was fitted with an environmental windscreen to negate the effect of air movement and tri-pod mounted
at a height of 1.3 meters above grade, and measurements were made away from any vertical reflecting
surfaces in compliance with ANSI Standards S12.92. All data were downloaded to a computer following
the measurement session. The sound data are shown in Appendix A and are summarized in Table 3.
TABLE 3 – AMBIENT SOUNT LEVEL MONITORING RESULTS
JUNE 21, 2012 AND July 16, 2012
Location Description Time Leq
(dB / dBA)
Loc‐1 Compound entrace
0233‐0253
(security door open) 68.3 / 58.8
1319‐1339
(security door closed) 64.8 / 51.7
Loc‐2 Nearest Propertiy
line
0300‐0320 61.1 / 48.7
1347‐1407 69.7 / 63.0
2 Acoustical Society of America, ANSI Standard S12.9-1992, “Quantities and Procedures for Description and
Measurement of Environmental Sound”
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
6.0 RESULTS AND CONCLUSIONS
Existing noise conditions at the wireless facilit at 723 Osgood Street were measured on June 21, 2012
and July 16, 2012 during the daytime and nighttime hours. Average measured noise levels included all
sources operating in the area at the time of the site visit, including HVAC equipment, air and road
traffic, and human and wildlife activities. These average measured noise levels ranged from 69.7 dB to
64.8 dB during daytime hours and from 61.1 dB to 68.3 dB during nighttime hours.
Environmental Noise Assessment Report Site No. [SITE NUMBER]
EBI Project No. [EBI PROJECT NUMBER] 723 Osgood Street North Andover, Massachusetts
21 B Street Burlington, MA 01803 1.800.786.2346
7.0 LIMITATIONS
This report was prepared for the use of Sprint/Ericsson. The conclusions provided by EBI are based
solely on the information provided by the client. The observations in this report are valid on the date
and time of the investigation. Reported noise levels contained herein are a factor of meteorological and
environmental conditions present at the time of the site survey, and represent “typical” site noise levels.
Measurement and calculations contained in this report should be considered accurate to within one
decibel. Any additional information that becomes available concerning the site should be provided to
EBI so that our conclusions may be revised and modified, if necessary. This report has been prepared in
accordance with Standard Conditions for Engagement and authorized proposal, both of which are
integral parts of this report and has been designed to address the North Andover Special Use Permit
noise requirements only. No other warranty, expressed or implied, is made.
8.0 REVIEWER CERTIFICATION
I, Glenn Gould, state that:
I am an employee of Envirobusiness Inc. (d/b/a EBI Consulting), which provides acoustic survey
and compliance services to the wireless communications industry. I have reviewed the data
collected during the site survey which is incorporated into this Site Compliance Report such
that the information contained in this report is true and accurate to the best of my knowledge.
Sincerely,
By EBI Consulting
Glenn Gould
Program Manager
21 B Street Burlington, MA 01803 1.800.786.2346
APPENDIX A
SOUND MONITORING DATA & NOTES
Client Site #:
3)birds / wildlife 7)
4)distant road traffic 8)
2)leaves rustling 6)
Humidity:57%57%
Sky:clear clear
SOUND SOURCES (order by most prominent)
1)equipment hum 5)distant airport
Wind Speed:9 mph 9 mph
Wind Direction:NW NW
Start End
Temperature:84°F 84°F
WEATHER CONDITIONS: (per http://www.erh.noaa.gov/)
MEASUREMENT MEASUREMENT LOCATION (SKETCH)
Location #:1
Location:compound entrance (door closed)
Date:Monday July 16, 2012
Start Time/End Time:1319 / 1339
Run #:
EBI CONSULTING - NOISE MONITORING FIELD NOTES
EBI Project #:62121701 BS54XC860-A
Performed By:Peter A. Bruno
MONITORING NOTES (describe & note time of intrusions, changes in condition, etc.)
Client Site #:
3)
leaves rustling
7)
4)distant airport 8)
birds / wildlife
2)6)
Humidity:57%58%
Sky:clear clear
SOUND SOURCES (order by most prominent)
1)road traffic 5)
Wind Speed:9 mph 7 mph
Wind Direction:NW N
Start End
Temperature:84°F 89°F
WEATHER CONDITIONS: (per http://www.erh.noaa.gov/)
MEASUREMENT MEASUREMENT LOCATION (SKETCH)
Location #:2
Location:nearest property line
Date:Monday, July 16, 2012
Start Time / End Time:1347 / 1407
Run #:
EBI CONSULTING - NOISE MONITORING FIELD NOTES
EBI Project #:62121701 BS54XC860-A
Performed By:Peter A. Bruno
MONITORING NOTES (describe & note time of intrusions, changes in condition, etc.)
Client Site #:
3)7)
4)8)
2)crickets 6)
Humidity:72%72%
Sky:clear clear
SOUND SOURCES (order by most prominent)
1)equipment hum 5)
Wind Speed:5 mph 5 mph
Wind Direction:W W
Start End
Temperature:81°F 81°F
WEATHER CONDITIONS: (per http://www.erh.noaa.gov/)
MEASUREMENT MEASUREMENT LOCATION (SKETCH)
Location #:1
Location:compound entrance (door open)
Date:Thursday, June 21, 2012
Start Time / End Time:0234 / 0255
Run #:
EBI CONSULTING - NOISE MONITORING FIELD NOTES
EBI Project #:62121701 BS54XC860-A
Performed By:Peter A. Bruno
MONITORING NOTES (describe & note time of intrusions, changes in condition, etc.)
0240 - train whistle
Client Site #:
MONITORING NOTES (describe & note time of intrusions, changes in condition, etc.)
3)7)
4)8)
2)crickets 6)
Humidity:72%72%
Sky:clear clear
SOUND SOURCES (order by most prominent)
1)distant traffic 5)
Wind Speed:5 mph 5 mph
Wind Direction:W W
Start End
Temperature:81°F 81°F
WEATHER CONDITIONS: (per http://www.erh.noaa.gov/)
MEASUREMENT MEASUREMENT LOCATION (SKETCH)
Location #:2
Location:nearest property line
Date:Thursday, June 21, 2012
Start Time / End Time:0301 / 0321
Run #:
EBI CONSULTING - NOISE MONITORING FIELD NOTES
EBI Project #:62121701 BS54XC860-A
Performed By:Peter A. Bruno
MONITORING NOTES (describe & note time of intrusions, changes in condition, etc.)
0301 - police sirens
0312 - utility truck drives by
0313 - traffic, utility truck
0315 - utility trucks drive by
21 B Street Burlington, MA 01803 1.800.786.2346
APPENDIX B
EBI - ENVIRONMENTAL NOISE MONITORING RESULTS
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21 B Street Burlington, MA 01803 1.800.786.2346
APPENDIX C
EQUIPMENT SPECIFICATIONS
CAS ELLA
Certificate of Conformity and CEL.
Instrument Type:-
CEL -633.B
Serial Number
5011536
Firmware revision
V129..-02
Microphone Type:-
CEL -251
Serial Number
1736
Applicable standards: -
IEC 61672: 2002 / EN 60651 (Electroacoustics - Sound Level Meters)
IEC 60651 1979 (Sound Level Meters), ANSI S1.4: 1983 (Specifications For Sound Level Meters)
ANSI S1.4 1983 Sound level meters, ANSI S1.43 1997 (R2007)
Note:- The test sequences performed in this report are in accordance with the current Sound level meter
Standard - 1EC61672. The combination of tests performed are considered to confirm the products
electro -acoustic performance to all applicable standards including superceeded Sound Level Meter
Standards - IEC60651 and IEC60804.
Test Conditions:- 23 °c Date of Issue:- December 14, 2011
26 %RH
99U mBar Recall due:- December 13, 2012
Declaration of conformity: -
This test certificate confirms that the instrument specified above has been successfully tested to comply
with the manufacturer's published specifications. Tests are performed using equipment traceable to
national standards in accordance with Casella's ISO 9001:2008 quality procedures. This product is
certified as being compliant to the requirements of the CE Directive.
Test Summarv:
Self Generated Noise Test
All Tests Passed
Electrical Signal Test Of Frequency Weightings
All Tests Passed
Frequency & Time Weightings At 1 kHz
All Tests Passed
Level Linearity On The Reference Level Range
All Tests Passed
Toneburst Response Test
All Tests Passed
C -peak Sound Levels
All Tests Passed
Overload Indication
All Tests Passed
Acoustic Tests
All Tests Passed
Typical Combined Electro -Acoustic Frequency Response - A Weiqhted
Combined Electro -Acoustic Frequency Response - A Weighted (IEC 61672-3:2006)
Toll Free: +1 (800) 366 2966
The following A -Weighted frequency response graph shows a typical instruments overall frequency response based upon the
application of multi -frequency pressure field calibrations. The microphone's Pressure to Free field correction coefficients are
applied to pressure response. Reference level taken at 1 kHz.
Fax:- + 34 91 636 0196
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-40.0
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Casella CEL (U.K.)
Casella USA
Casella Espana S.A.
Regent House
17 Old Nashua Road #15
Polfgono Eur6polis
Wolsely Road
Amherst
Calle C, n04B
Kempston
NH 03031-2839
28230 Las Roza.- Madrid
Bedford
U.S.A.
MK42 7JY
Phone: +44 (0) 1234 844100
Toll Free: +1 (800) 366 2966
Phone: + 34 91 640 7519
Fax: +44(0) 1234 841490
Fax +1 (603) 672 8053
Fax:- + 34 91 636 0196
E-mail: info@casellacel.com
E-mail: info@casellaUSA.com
E-mail: online@casella.es.com
Web: x .casellacel.com
Web: wvnv.casellaUSA.com
Web: xvrw.casella-es.com
Page 1 of 1
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.: CASELLA
CEL
Certificate of
Conformance and Calibration for
CEL -120 Acoustic Calibrator
Applicable Standards :-IEC 60942: 2003 & ANSI SI.40: 2006
CEL,120/1 Class 1
CEJ,120/2 Class 2 =
Serial No: 4 711366
Firmware: 0
Temperature: 9 ?,°C Pressure: -1_n15 mb %RH
Frequency = I.00kHz ± 2Hz Calibration Level
T.H.D. = < 1
SPL Q 114.OdB Setting r0 dB
SPL en 94.0dB Setting dB/?#*
(CEL,120/1 only)12
Engineer:-. 14
4 : DateNov 7011
fl -1-0
Company test equipment and acoustic working standards, used for conformance testing, are
subject to periodic calibration, traceable m UK nation,] standards, in accordance with the
company's IS09001 Quality System.
DECLARATION OF CONFORMITY
This certificare confirms that the instrument specified above has been produced and tested to comply with
the manufacm—'s published specifcadons and the relevant European Communiry CE directive&
CaseOa CEL ( U.K. ),
Regent House, \Volselcy Road, Kempston, Bedford. bIK42 7JY
phone: +44 (0) 1234 844100 Fac +44 (0) 1234 841490
E-mail: inf rLDcaseu-1..m
Web: �w,vw.casellameasuremenccom
198032A-01
CASELLA
SEL
EC Declaration of Conformity
Casella CEL
Regent House, Wolseley Road
Kempston, Bedford, MK42 73Y, UK
Instrument Type:- CEL -62x and CEL -63x Series Sound Level Meters
EMC Immunity and Emission Standards Applied: -
The above instrumentation has been designed and tested to comply with the following EMC / ESD
standards: -
IEC 61000-4-2 Testing and Measuring Techniques — Electrostatic discharge immunity tests.
IEC 61000-4-3 Electromagnetic compatibility (EMC) - Radiated Electromagnetic field tests.
IEC 61000-4-6 Electromagnetic compatibility (EMC) — Immunity to conducted disturbances
induced by radio frequency fields. Tested at l OV/m or greater.
Low Voltage Directive 2006/95/EC
Instrument contains no hazardous voltages. Power supplies conform to the requirements of the
following safety standards:-
EN60950 Safety of IT equipment
EN60335-2-29 Safety of Electrical Appliances
Product Specific Standards:-
IEC61672-1 (2002) Electroacoustics — Sound Level Meters.
This is to certify that the above product(s) have been designed, tested and built to comply with the
requirements of identified product specific standards, and also general protection requirements of
the EMC Directive 2004/108/EC.
Stephen Tearle, Head of Technical Services
AP24-02
Date of Issue
' 21/01/2011