Document oM9o9rJkq80kMQ48DLx1K6paD
PLAINTIFF'S EXHIBIT Acr-2.1
To: C. W. Lawrence Location: Azusa From: N. D. Yin Location: Wayne
July 3, 1991
cc: J. C. Caporossi-W3 J. A. Marin-AZ J. B. Plummer-HC
Subject: -Annual Industrial Hygiene Survey-Azusa.
Annual Industrial Hygiene Survey was conducted at Azusa. Other than the completion of identifying Asbestos at the old resin plant (my memo to A. C. Marek on 5/29/91), 30 air samples were collected during this survey, to determine employees' exposure to 7 substances. In addition, noise level was monitored at affected areas, capture velocity was measured for lab hoods.
Based on the analytical results, employees' exposures to Nuisance .dust, Aluminum, Molybdenum, Nickel, Mercury, Nitrogen Dioxide and noise were all below its individual OSHA PELs(Permissible Exposure Limits). Exposure information are contained in table 1, 2, 3 and 6. Significant improvement was observed on the lab hoods and plant noise levels in such, the capture velocity for all 5 lab hoods are now meeting the Cyanamid requirement of 80 FPM (Corporate IH Standard No. 4) and the noise level for the major emission sources are reduced to below 90 dBA. However, there is one area; at the east end of Calciner 300-15A, still has noise at the boarder line of 90 dBA. The improvement, comparing with the previous measurements showed in the table 4 and 5, indicated the concern of the plant management for employee health and is highly commendable.
0199
Table 1
Dust and Metals exposure measured at Azusa
(product: HDS1443)
Name/SS no. lob .title date
ELUDE flow time rate(L/M) on Off
IMS
Exposures(mg/M3)
dust Al Mo Ml
Sergio
Kiln opr. 5/7/91
Jauregui
(.561-57-7568)
1.03
0822 1527 0.85 0.14 0.03 0.01
Juan
Extruder
Gutierrez
opr.
(569-87-6446)
5/7/91 5/8/91**
1.136 1.136
5/9/91
1.136
Sonya Bright
(572-43-6373)
Muller opr.
5/7/91
1.042
0830 1532 0.75 0.19 0.03 0.01 0850 1350 0.87 0.09 0.01 <0.01 0815 1530 0.20 0.05 0.01 <0.01
0835 1535 2.70 1.44 0.01 <0.01
Fred
So In.
Applegate
opr.
(316-24-4440)
5/7/91
1.046 .0840 1531 0.30 0.08 <0.01 <0.01
S. Isaac
Kiln.
(551-49-6310) opr.
5/8/91** 1.03
5/9/91
1.03
0808 1533 0.63 0.17 0.03 0.01 0811 1534 1.01 0.07 <0.01 <0.01
Noel Deocampo
Extruder opr.
5/8/91** 5/9/91
1.042 1.042
0855 1533 0.97 0.28 <0.01 <0.01 0820 1527 0.41 0.09 0.01 <0.01
Frank
Shift
Delgado
super.
(572-58-7715)
5/8/91**
1.046
0915 1540 0.12 0.04 <0.01 <0.01
Genaro Alvarado
Muller opr.
5/9/91
1.046 0825 1525 2.19 0.08 0.01 <0.01
*OSHA PELs
for Nuisance dusts, total particulates: Aluminum, soluble salts, as Al: Molybdenum, soluble compounds, as Mo: Nickel, soluble compounds, as Ni:
15 mg/M3 TWA, 2 mg/M3 TWA, 5 mg/M3 TWA,
0.1 mg/M3 TWA.
**Operation down on 5/8/91, most operators involved cleaning works.
0200
Table 2
Mercury exposure measured at Azusa (product: HDS1443)
Name/SS no. Jab iiiie date
Marylyn
Lab tech. 5/7/91
Figueroa
(.554-33-5877)
Bmnp flaw
iima
rate(L/M). on Oil
0.199
0816 1526
Hg TWA* Exposures(mg/M3)
0.0013
ETsperanza
Lab tech. 5/8/91
Reveche
('550-43-0158)
5/9/91
0.199 0.199
0850 1532 0807 1535
Area, on the bench top 5/7/91 next to #5 Hg hood.
Area, between PSD instruments
5/8/91
Area, next to presser for panetrometer.
5/9/91
0.197 0.197 0.197
0816 1526 0805 1532 0807 1535
0.0010 0.0005 0.0025 0.0007 <0.0001
*0SHA PEL for Mercury ,all forms except alkyl vapor, as Hg: 0.05 mg/M3 TWA
0201
Table 3
Nitrogen dioxide exposure measured at Azusa (product: HDS1443)
Name/SS nsu. Job .title date
Frank
Shift
Delgado
Super.
(572-58-7715)
5/7/91 5/8/91
time on Off
0816 1545
0915 1540
Sergio
Kiln
Jauregui
opr.
(561-57-7568)
Fred
So In.
Applegate
opr.
(316-24-4440)
S. Isaac
Kiln
(551-49-6310) opr.
5/7/91 0822 1527
5/7/91 0840 1531
5/8/91 0808 1533 5/9/91 - 0811 1534
Juan
Soln.
Gutierrez
opr.
(552-80-3568)
5/8/91 5/9/91
0850 1545 0815 1530
Noel Deocampo Extruder 5/9/91 opr.
Genaro Alvarado
Muller opr.
5/9/91
0820 1527 0825 1525
N02 TWA* Exposures(PPM)
0.12 <0.10
0.11
0.12
<0.10 <0.10 <0.10 <0.10 <0.10 <0.10
*OSHA PEL for Nitrogen Dioxide: 1 PPM STEL.
ACGIH TLV for Nitrogen Dioxide: 3 PPM TWA 5 PPM STEL.
0202
Table 4 Capture velocity measured at Azusa laboratory.
5/8/91
Hood No.
Size
Sash position
1.
5.3'x2.5'
full open
1' open
2. 8' x3'
full open 1' open
3. 2.5'x3'
Slot hood
4.
3.3'x2.3'
full open
5. 2' x2'
full open
Capture velocity measured (FPM)* Current Before
118 152
< 50(11/15/90)
142 228
< 50(11/15/90)
slots 177, 183, 150
91 < 50(11/15/91)
123
< 50(11/15/90)
^Minimum Capture velocity for an existing laboratory hood is 80 FPM as required by Cyan^mid Corporate IH Standard No. 4.
0203
Table 5
Area noise exposure measured at Azusa
on 5/9/91
Are.a
Metal. solution platform
-under attic fan between tanks 300-56 and 300-27.
Noise le.yel dRA (slow)
Current
Before
86.3
95(8/23/82)
-under attic fan next to tank 250-008.
85.5
93.5(8/23/82)
SOM mil 1 -general
-east side -north side -west side -south side
Calciner 300-15A
85 85.5 85.8 84.7
98-99(8/23/82)
91.2(11/15/90) 90.8(11/15/90) 92.5(11/15/90) 90.3(11/15/90)
-east end under suspended pump -east end at discharger area -east end next to motor -west end
Impreenator 300-19
90.4 86.7 90.4 82.6
91.2(11/15/90)
-east end plateform area -west end under attic fan -middle section, northside
Impreenator 430-19
84.5 85.6 86
-east end platform area -middle section, northside
southside -west end discharger area
83.3 83.7 83.5 84.2
Calciner 300-15B
-next to motor, northeast corner -middle section, northside -west end
Kiln B
-middle section southside -west end
89.5 85.7 85
83.5 84.5
020<
Table 6
Personal noise exposure measured at Azusa (product: HDS1443)
Name/SS no. Job title date
lame on off
Sergio
Kiln
Jauregui
opr.
(561-57-7568)
5/7/91 0822 1527
Noise TWA* Exposures dBA
11.6
75.4
Exceeded 115 dBA
no
S'. I saac
Kiln
(551-49-6310) opr.
5/8/91 0808 1533
17
77.9
no
*OSHA PEL for Noise: 90 dBA TWA.
0205