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UNION CARBIDE CORPORATION
270 PARK AVENUE, NEW YORK, NEW YORK 1001
To tName/
Oiv,s.oi Location
Floor dumber
Mr. F. H. Larrison, Jr. Mining and Metals King City, California
Copy to
Mr. E.A. Piersall Mr. W. C. Tfaurber Dr. J. J. Welsh/Dr. K. S. Lane
Dote Originating Dept. Floor Number
July 5, 1974
Industrial Medicine and Toxicology
Answering fetter dote
Subject
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Dear Mr. Larrison: Attached are the tabulated findings of my industrial hygiene
survey for asbestos in air at King City, June 19, 20} 1974. Mr. Madlangbayan provided very valuable assistance in this endeavor.
The aim of this survey, as in the past, was to provide a fair representation of exposure of personnel to asbestos either by use of serial personnel samples or by serial general area samples where the latter would seem more appropriate. Air samples were collected by the standard technique on Millipore paper. Fiber count was made using a phase contrast microscope at 430X magnification.
Job Classification
or Area
Date
Bagger Area Bagger operator
(Don Garnica)
6/19
Sample Type
Time
Fibers per ml (5 microns or greater in length)
time weighted exposure (or potential exposure value
Pers.
9-*35 a10.: 09 a 10:0Q a-
10:47 a 10:47 a11:28 a
11:28 a12:06 p
3.90 2.82 4.77 1.41
3-20
Remarks
Bagging HP Pellets. Some bag breakage and some down time
*08373
UCC 013827
Mr. F. H. Larrison, Jr.
-2-
July 5, 1974
Job Classification
or Area
Date
Pelletizer operator
(Glen Dills)
6/19
Filter'Dryer Areas Filter Press Area
6/19
Dryer Area
Fork Lift
Operator
running from
bagger to storage
(Jim Vasquez)
6/19
P.esin Grade Baggi
Bagger operator
(Art Nieto)
6/19
Sample Type
Time
Fibers per ini (5 microns or greater in length)
time weighted exposure (or potential exposure value
Remarks
Pers.
9:31 a10:11 a 10:11 a10:42:a 10:42 a11:28 a 11:28 a12:08 p 12:08 p-
1:32 p
1.84 3-51 1.20 2.42 1.61
1.93
Same as above
Gen. Gen.
1:55 P2:35 P 2:35 P3:10 p 3:10 p3:35 p
2:38 p3:18 p 3:18 p3:55 P
1.00 0.91 0.87
1.13 1.07
Pers.
1:42 p-
2:25 P 2:25 P3:25 P
0.57 0.54
Pers.
9:34 a-
9:59 a 10:28 a-
10:53 a 10:55 a11:20 a 11:22 a11:45 a
1.37 O.98 1.43 1.07
UCC 013828
0.56
1.31
No wind but fiber covered floors Doors open. Bagging SX 24.
* ?,083
Mr. F. H. Larrison, Jr.
July 5, 1974
Job Classification or Area____________ late
Rock Fiber Circuit Area
6/20
Mechanic (Sd Sinclair)
6/20
Rock Fiber Circuit operator (outside) (joe Pereira)
6/20
Sample Type_______Time
Fibers per ml (5 microns or greater in length)
time weighted exposure (or potential exposure value)
Remarks
Gen.
9:38 a10:38 a 10:40 a-
10:47 a 11:50 a-
12:55 P 12:57 P-
1:57 P 1:58 p-
2:59 P 3:00 p4:00 p
0.21 0.20 0.11 0.50 0.37 0.18
Circuit running normally except for break down of about 85 min
Pers.
9:28 a9=55 a 9:58-a10:30 a 10:32 a10:57 a 10:58 a11:24 a 11:26 a12:54 p 12:54 p-
1:19 P 1:21 p-
1:49 p 1:50 p-
2:23 P 2:23 P2:45 P 2:48 p3:13 P
3:29 P4:00 p
1.04 0.57 0.74 0.83 0.5 4 3.01 1.09 1.01 0.92 1.75
1.21
1.15
Working on HG Mill Working outside Mill building Working outside Mill building
Painting stairs on RF circuit (outside) Some clean-up in shop
Pers.
12:59 p2:07 p 2:07 p3:05 P
2.01 2.00
2.00
Windy
UCC 013829
4
Mr. F. H. Larrison, Jr.
4- - July 5, 1974
Job Classification
or Area
Date
Caterpillar operator ore pile (Rick Camarillo)
6/20
J. Deere grader loader operator (Mike Hazelton)
6/20
Sample Type
Time
Fibers per ml(5 microns or greater in length)
time weighted exposure (or potential exposure value)
Remarks
Pers.
12:45 p1:26 p
1:36 p2:18 p
1.41 2.83
Pers.
2:19 p3:10 p 3:10 T>-
4:00 p
4.6l 4.43
1.96 4.52
Windy Windy
As you will note, none of the counts exceeded 5.0 fibers/ml so for this period the areas and jobs tested were within the limit. However, we continue to demonstrate that at the bagger for standard fiber, the level will probably be in excess of the July, 1976 limit of 2.0 fibers/ml more often than not. The concentrations of fiber shown for the John Deere operator were higher than I would have guessed but probably reflects the windy conditions at the time.
Very truly yours.
FWM:lk
Paul W. McDaniel Industrial Hygiene Engineer
UCC 013830
4
76