HomeMy WebLinkAboutConsultant Review - 45 BEECHWOOD DRIVE 7/17/1997 02/05/2007 08:56 6033295368 DUTTON & GARFIELD PALiL UYIUZ)
CAVANAUGH
TOM
ASSOCIATES, INcOltPORATFI)
327 F BOSTON POST ROAD,SUDSU Ity,MA 01716 TEL:(548)443-7871 PAX;(50A)443-7873 *-MAIL:
July 17, 1997 IMF OG [74 a W[a 17\)
J11 181997
Mr. Stephen E.Foster
Dutton and Garfield,Inc.
70 Flagship Drive
North Andover,MA 01945
SUBJECT; Environmental Sound Assessment
L-Coin Facility,Beechwood Hill,111,,'orth Andover,MA
Dear Mr. Foster,
At your request-,Cavanaugh Tocci Associates,Inc.has performed environmental sound
measurements i.n the vicinity of the new L-Com facility in North Andover, MA.The purpose of
these studies was to assess facility sound emissions. The following is a discussion of applicable
criteria,sound measurements and conclusions.
Criteria
The Massachusetts Deparfinent of Environmental Protection(MDEP)has been given the
responsibility of establishing and enforcing regulations which limit sound in the environment.
This agency bas developed Community Sound Level Criteria that are guidelines for limiting
sound at property lines and nearest affected residences. These guidelines are as follows:
A source of sound will be considered to be violating the Department's noise regulation(310-
CM,R 7,10) if the source:
1, Increases the broadband sound level by more than 10 dB(A)above ambient,
or
2. Produces a "Pure tone condition- when any octave band center frequency
sound pressure level exceeds the two adjacent center frequency sound pressure
levels by 3 decibels or more.
C303 MEMBER FIRM, NATIONAL COUNCIL OP ACOUSTICAL CONSULTANTS
02/05/2007 08:56 6033295358 wI rUN ak LNW-1tLV rF = 0,31oa
Mr. Stephen E.Foster page 2
Environmental Sound Assessment,L-Com Facility,Beechwood Hill,North Andover,MA
These criteria are measured both at the property line and at the nearest inhabited residence.
Ambient is defined as the background A-weighted sound level that is exceeded 90%of the time
(L90)measured during equipment operating hours. The ambient may also be established by other
means with the consent of the Department.
Sound 1V1lcasurements
On January 31, 1997 and July 16, 1997 Cavanaugh Toeei Associates,Inc.performed
environmental soured level measurements at the property line between 35 Cherise Circle and the
L-Com facility. The measurements conducted on 1/31/97 were petformed prior to the
construction of the facility,and the measurements conducted on 7/16/97 were performed with all
facility mechanical equipment operating.The results of these measurements are presented in
Figures 1 and 2.These octave band spectra and corresponding A-weighted souund levels are 10
values, and provide a representative indicator of daytime background sound levels. These data
indicate that no significant change in background sotutd levels has occurred since the
construction of the L-Com facility(42 dBA measured 1/31/97 and 43 dBA measured 7/16/97).
Conclusion
On the basis of our measurements we can conclude that Environmental sound produced by the
L-Com facility complies with the MDEP Community Sound Level Criteria.Facility operation do
not increase broadband background sound levels by 10 dBA,and the facility does not produce a
pure lone condition.
It has been a pleasure to perform these studies.If you have any Airther questions,please do not
hesitate to call me.
Sincerely yours,
CAVANAUGH TOCCI ASSOCIATES, INC.
Douglas H.Bell
encl:
D�M7261
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17[/13W2100f 00;DO 0Vjj477300 VUI 1UN & LV-WrlLLLJ F'AUL U4Iub
97261.XLS Chart 3 CAVANAUGH TOM ASSOCIATES, INC, Printed 7/16/97
Background Sound Level .Measured 1131197 @ 1:00 pm
35 Cherise Circle,North Andover MA
90
80
70
N
E '
z
oa 60
IN
50
a 40
V
0
30 ....
20
10
31.5 63 125 250 500 1000 2000 4000 8000 16000
7/1 Octave Band Center Frequency(Hz)
L90 A-Weighted Sound Level:42 d8A
Figure 1
02/05/2007 08:55 bUJJZ=J00
- 97281.XL9 Chart 4
CAVANAUGH TOCCI ASSOCIATES, INC. Printed 7/16197
Background Sound Level -Measured 7116197 @ 10:00 atrt
35 Cherise Circle.North Andover MA
90
N
C
E
N
m
J
10
31.5 63 125 260 600 1000 2000 4000 8000 16000
111 Octave Band Center Frequency fHz)
—0— L90 A-WBighted Sound Level: 43 dBA
Figure 2
02/05/2007 08:56 6033295368 DUTTON & GARFIELD PAGE 01/05
Button a ref , Inc.
CONTRACTORS
Project Memo
42 Beechwood Drive,..
North Andov��,`MA��__•"`,
To: Uncoln Daly Planner®Town of North Andover, MA 9''7 4F (► 9S"OKZ-
From: Stephen E. Foster
Date: 2/5/07
Re: sound study
Mr. Daly:
For your information please find enclosed a sound assessment study performed at pre
and post construction of the above facility back In 1996-1997.
As you can see from the attached document the new L-Com facility meets MDEP
Community Sound Level Criteria and that there has been no significant change in
background sound level subsequent to the occupancy of this facility.
Hopefully this information is useful to yourself and the planning,board when evaluating
the proposed renovation project.
Sincerely.
Stephen E. Foster,V.P.— Project Manager
flle:C,/Projectal-comfolf renov 06/rnarnw 5a
eoalm may L-com
BUTLER
43 GIFnte brlve a Hampstead,NH 03841 BUILDER North Andover,Massachusetts 01845
Tcl:(603)329-5300 Fax:(603)329-5368 www.duttongarfield.com Tel:(978)681.8600 Fax:(978)681-7s70