Document wgbKVdb6d1KbQowz7a5Z06EVJ
DOW CHEMICAL U.S.A
MARCH 5, 1982
LOUISIANA OIVISION P. O. BOX ISO
PLAQUEMINE. LOUISIANA 70764-0160 604 3B9-8000
P. J. PREJEAN - RAILROAD J. M. CRONAN - TANK CAR CLEANING CHARLIE HALPHEN - INDUSTRIAL HYGIENE DANNIE KENNEDY - INDUSTRIAL HYGIENE JOHN MCBRIDE - SAFETY
ATTACHED IS A NOISE SURVEY OF THE COMPRESSOR AND PUMP AREA, UNDER ROOF AND OPEN ON 3 SIDES, ON WEST END OF BLDG, 4101. THIS IS ADJACENT TO A WORK AREA AND IS DESIGNATED AS AN AREA OF EXCESSIVE NOISE, WITH HEARING PROTECTION REQUIRED.
IN ADDITION TO THE SURVEY USING A SOUND LEVEL METER TO MEASURE INTENSITY, AN OCTAVE BAND ANALYZER WAS USED TO SEPARATE AND IDENTIFY THE COMPRESSOR PROBLEM FREQUENCIES. MAINLY, THE PROBLEM WAS FOUND TO BE IN THE LOWER FREQUENCIES, WHICH SHOULD BE RECTIFIED BY THE PROPOSED BARRIER.
IT IS RECOMMENDED THAT A THREE SIDED BARRIER (LEAVING SOUTH SIDE OPEN) MADE OF CONCRETE BLOCK, WITH ONE DOOR, BE CONSTRUCTED. THIS SHOULD PROVIDE A PERMANENT SOLUTION TO THIS NOISE PROBLEM.
ALL SURVEY RESULTS ARE IN DECIBELS (DBA).
A COST ESTIMATE FROM ENGINEERING IS INCLUDED.
J. L. MOREAU, JR. INDUSTRIAL HYGIENE - RAILROAD/MARINE
SG
AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY
UL/U^J I _/W-*
t S **
Pu/nP P-X/) <?-J2> aajo
PUAM//A/4-
fiC-X( Paa/fIs off)
^ --------------------------
i. |x ^ - hco z
O LU
OD O
fiFADwSS HAi SMtJftik/uhRKj/jA A/}/?/) Tfik*J S FT. fiP/fftT A>F*T To ZAkJ
pokVi
NOISE SURVEY AIR COMPRESSORS & PUMPS WEST END OF BLDG. 4101
2-19-82 WIND ESE - 9 MPH AC-1 (OLD) AIR COMPRESSOR - RUNNING ALONE
DISTANCE
r 3* 5' 10' 17'
NORTH
92 90 88
SOUTH
94 91 90 88 85
EAST
92 90 89 85
WEST
92 90 88
2-23-82 WIND CALM AC-2 (NEW) AIR COMPRESSOR WITH PANELS OFF - RUNNING ALONE
DISTANCE
r 3' 5' 10' 15'
NORTH
105 103 100
97 96
SOUTH
101 99 97 95 93
EAST
107 104 102
99 96
WEST
102 101 100
97 95
AC-2 RELIEF' VALVE NOISE AT 31 SECOND INTERVALS (13 ON - 18 OFF)
DISTANCE
NORTH
ALONG SIDEWALK/WORK AREA
5' 106 CORNER - EAST END - 96
CORNER - WEST END - 97
10' 102
WORK PLATFORM - 94
17'
100 (MIDDLE OF
CHANGE ROOM DOOR - 88
SIDEWALK)
00 080818 CONFIDENT!
3-5-82 AIR COMPRESSOR AC-2, CHECKED WITH OCTAVE BAND ANALYZER.
ALL READINGS MEASURED 5 FT. FROM SOURCE IN ALL 4 DIRECTIONS.
OCTAVE BAND FREQUENCY Hz
31.5 63 125 250 500 1000 2000 4000
WEST 91 81 95 92 94 91 85 80
NORTH 92 85 92 91 96 89 84 80
EAST 92 85 94 90 92 89 85 79
-
SOUTH 93 87 96 94 95 88 81 77
0 o8Sr
C
PLA.STC0N7ACTRROBLEM
/*.
*
*
NOISE OVERVIEW
. (_
-- YYL**-
*
1
1
j RECOMMENDATIONS
Ito eOtefU&teJ? t
_ />0^6-W^' i ,<_' *^. <>-
/ wT-' / lw --' y#Oj ICC& $ L\0O'O.
TLS&? - 3-'^>7^
TL-llOo --
, ^v<'
**&''}*-
4* *
5
rTi^ a;/*.
^
-*> y~. ... c7 s^C&Cij&.y r/x&>-<)--
TL,K-]f*
7'- s/C yu
T-hx-
_ 7^Z ,
!
, . ,- -
T ., , ^
< O f-1 r; 1-
00 Z
O UJ
(33 D
Cm U-
CZ
O Ou
I
Noise Sue ney Pi/CCe^pR$soPS + PuaiPs tuesr a;d of N>a V/o /
x~/9'?3- U)iH> FSF - q mph PC'7 (pip) P/P CoMPResSoR - Ro/j/Jtu& pLo/jh
*-
---
oiSTftuce
r
3` Sf 10 ' IT
JJoPTH 9x ?o Zf
* S" outH qq
9/ 9o ?? zs
Past 9o9o Z9 SS
OJFST 9o9o f?
2--23-??- OJ/fiJO PaUp PC-x (ueu/) p/p wP/ies$o/i oorrn PaftPs off- Roaj/j/N pioA/e
D/sre/JcF
r
3` S' lo`
IS1
jhfcrH loS /o3 , loo
97 9C
SooTH /o/
99
97
9S 93
Fast (07 Jo 9 /o 0-
99 9C
OOFST JoX /oJ /oo
97
9S
PL- X PeUeP \LaI\} Aloise /?'T 3/ SecoUD /HreR \JAiS Q3 QH-ff oFp)
DiSTftfJte
S' ID' n`
North JoC too~ /OO L$tt>eu//Hk: /
$H>L>aUC laJdRk! PPeP
CeRve/Z-eftST ehd --9L Cd/McR-u)e$T erup -- 97
UfoRK Purfttoo - 99 CH/wQe PeoM DooR --
DO 0808"1 CONFIDENTIAL
# A.
So'jyff
O'
0
/
SI
/l-ST *so T(P0
`y>&0
"JT - r >_
on ;` ?/
7S
7j
%5 o~, i <?/ <? vf Cv
P5* ^4
*"> ?: > C C7
?7 :>/ , w' <i IS-7
71
ujeSy VD lt. /o /
ALL
Ttffcs/J S' FT F/?tr> 'StvM
00 08082? CONFIDENTIAL
No te Sun Vi Y'TVK '"CenffieSso&S
3-Zo-Vs OJ/mp CfiL/A
At-0- (veto) A/A CwP/SSToA 00/TH Pa/JtS oSS-- Ao/J/jS a/oaj^
b/STA/JcS
/' 3' s' /o' /S'
jMltL I6S /Cg io3 /c?i /oo /*</
9l 9C H
SouTH /o / /o< 11 /e S
7 7 tc>o
qs <n 93 1%
SAST lol /oq /OS 99 9C
u)$r /OS /o/ /oo
97 9S