WSDOT background noise info submitted April 29.pdfFrom: Magnoni, Larry <Magnonil@wsdot.wa.gov>
Sent: Tuesday, April 29, 2014 11:59 AM
To: Cunningham, Diane
Cc: Clugston, Michael; Esary, Susan; Crisman, Dave; Barker, Carl
Subject: Background Sound Levels for project area. (A77701A, XL4420)
Attachments: Edmondsequipmentnightime2.doc; Edmond Crossing Noise Measurements partl.pdf,
Edmonds Crossing Noise Measurements Part 2.pdf
Diane,
Michael told me that he would not be in the office and to send these measurements to you to get to Mr. Olbrecht. Phil
Olbrecht, the hearing examiner for last Thursday's hearing requested them. I said at the hearing that I would look to see
if we had some measurements that would support the background sound level but if we could not find any I would
measure it myself. Please let me know as soon as possible if these will not work.
These measurements were taken in 1995 but I believe the early morning time frame accurately reflects the existing
background sound levels for the early morning hours when little traffic is on SR104. These reported figures show that at
these early morning hours sound levels could drop to as low as 51-52 dBA (see attached tables). I am confident that,
although traffic increase in the day time, the night time background is still around 51-52 dBA as measured in 1995. In
my professional judgment, nighttime sound levels would, at most, increase the 1995 measurements 1-2 decibels.
I have also updated the equipment table to show how sound from this work would drop off to the receivers at 500 and
1000 feet to residential receivers indicated on the mailing list as well as revised some of the activities based on a better
understanding of how the equipment will be used on the project.
Adak
Washitvytoo State
ofTran:spartafton
Larry J. Magnoni
Acoustic, Vibration, Air Quality & Energy Specialist
phone; 206-440-4544 fax; 206-440-4805
email; magnonil@wsdot.wa.gov
ir}r Our Web Page
http.,Ilwww.wsdot.wa.govIEnvironmentlAirINoise.htm
bA Please don't print this e-mail unless you really need to. Reduce, Reuse, Recycle
***Please retain or include the workorder number (XL0000) and/or contract number (0000) and/or WIN
(A00000_) in the subject line so it will automatically sort to my Outlook project folders.—
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Page 12 Noise
Edmonds Crossing
sea1002B565,DOCp Discipline Report
Table 1
Sound Levels and Relative Loudne' 9s of Typical Moises in Indoor and
Outdodr Environments
Sound;
Relative Loudness
-
Level Subjective
(huMan judgment of
Activity
(dBA). Impression
different sound levels)
Jet aircraft takeoff from carrier
MO 'threshold offen
pain
64 times as loud
(15 m./50 it)
50 -hp siren (W mJ1 00 ft)
130
32 times as loud
Jet takeoff (60 mJ200 it)
120 Uncomfortably loud
16 times as loud
Riveting machine
110
8 times as loud
Jot takeoff (600 m.*/2,000 ft)
100 Very loud
4 times as loud
Heavy truck or motorcycle (8 m./26 ft)
90
2 times as loud
Pneumatic drill (15 mJ50 ft), garbage
80 Moderately loud
Reference loudness
disposal, or food blender
Vacuum cleaner (3 mil 0 it) or pas-
70
U2 as loud
senger car at 65 mph (8 m./25 ft)
Large store air-conditioning unit
60
1/4 as loud
(6 MJ20 h)
Light auto traffic (00 m./i oo ft)
60 Quiet
1/8 as loud
Bedroom/living room or bird calls
40.
1/16 as loud
Library, soft whisper (4.6 m./15 ft)
30 Very quiet
Broadcasting studio
20
10 Just audible
0 Threshold of hearing
Source: Beranek, 1971 -
Table 2
Edmonds City bode Noise Limitations
DistrictofReceiving Prop"
Residential. District Business District
Commercial District
District of Sound Source
Residential District
55 dBA 57 dBA
60 dBA
Business District
57 dBA 60 dBA-
65 dBA
Commercial District
60 dBA 65 dBA
70 dBA
Source: Edmonds City Code, Chapter 5.3.
Page 12 Noise
Edmonds Crossing
sea1002B565,DOCp Discipline Report
*This monitoring location was specifically selected to aid in model verification only, this location is within the
.SR 104 right-of-way where there are no applicable FHWA criteria.
Thirty-seven receiver locations were selected for use in predicting noise levels in
the project area. The receiver locations are identified in Figure 4 as RI through
R37. To calculate existing peak -hour noise levels at receiver locations where traffic
is the dominant noise source, existing peak -hour traffic data ,were used in the
STAMINA model. Maximum measured noise levels are used in lieu of the
STAMINA model results where traffic is not the dominant noise source. Existing
noise levels for the 37 receivers are summarized in Table 7. STAMINA model out-
put files can be found in Appendix D for the existing peak -hour L...
Edmonds Crossing Noise page 19
Discipline Report seaJ002B56S.D0Cp
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Table 5
Measured Noise Levels
(d Bao -L,)
Range of
Noise
Monitoring
Existing
Measured Noise
Ahaternent
Location
Land Use
Address of Receiver
Levels
.
Criteria
M1
Commercial
Comer of Main Street and Rail-
56-62
72
road Drive
M2
Residential
The Ebb Tide
67-60
67
200 Beach Place
M3
Commercial
Comer of Dayton Street and
63-64
72
SR 104
M4
Residential
Edmonds Park Condominiums
51 -65
67
M5
Commercial
Railroad Avenue
54-61
72
M6
Recreational
City Park near SR 104
55-58
67
M7
Residential
City Park comer of 3rd Avenue
52-69
67
and Pine Street
MB
Calibration
Comer of 216th Street and
62-68
point
SR 104
N/A
M9
Commercial
Comer of 216th Street and
53-58
72
UNOCAL Access Road
M10
Residential
11333 Makah Road
45-50
67
M11
Commercial
UNOCAL Site
48-50
72
M12
Recreational
Marina Beach Park
50-56
67
M13
Residential
21612 Chinook Road
47-48
67
M14
Residential
11920 216th S.W.
43-5o
67
Mib
Residential
11535 Makah Road
46-56
67
*This monitoring location was specifically selected to aid in model verification only, this location is within the
.SR 104 right-of-way where there are no applicable FHWA criteria.
Thirty-seven receiver locations were selected for use in predicting noise levels in
the project area. The receiver locations are identified in Figure 4 as RI through
R37. To calculate existing peak -hour noise levels at receiver locations where traffic
is the dominant noise source, existing peak -hour traffic data ,were used in the
STAMINA model. Maximum measured noise levels are used in lieu of the
STAMINA model results where traffic is not the dominant noise source. Existing
noise levels for the 37 receivers are summarized in Table 7. STAMINA model out-
put files can be found in Appendix D for the existing peak -hour L...
Edmonds Crossing Noise page 19
Discipline Report seaJ002B56S.D0Cp
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