Document EvxqdnnY2xaB3Q1718yjBqe6x
Data Sheet Chelsea Proving Grounds
August 18,1986
PLAINTIFF'S EXHIBIT CIIR-210
Department S720
- ....... Permissible Exposure Limit
-
Asbestos fibers per cc
With lengths> 5 microns
Result O.Z1'
T. W. A.* 072
Harook;~J r370-34-3626''' ------ " ' ` 0.05 Complete Brake Buildup and Thermo-couple set
0.01
Cook, T. 366-44-6816 Final Pad and Shoe .Inspection
< 0.01
< 0.006
Alder, I. 369-40-3369 Brake Shoe Grinder
<0.1
<0.006
* Time Weighted Average
Samples were taken on 25 im cellulose ester filters and analyzed by phase contrast optical microscopy.
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Data Sheet Chelsea Proving Grounds
ASBESTOS
Location
OSHA Permissible Exposure Limit (eight hour time-weighted average)
OSHA Ceiling Concentration (not to be exceeded at any time)
Concentration (fibers per cubic centimeter
of air)
2.0
10.0
1) Personal air sample, D. Bauer 0557, grinding L-car linings on Ammco grinder in Brake Lab
<0.1
eight hour time-weighted average <0.1
2) Personal air sample, L. Stark 4047, removing brake shoes to reset thermocouple 0.4
eight hour time-weighted average< 0.1
* E = CaTa * CbTb + ......... . CnTn total Time
E a equivalent exposure for the working shift, i-.e., eight hour time-weighted average
C concentration during any period of time T
; .".3 ;
. . *'
; . ___
T a is the duration of the exposure at the concentra
tion C
>-
.-T .................
(0.4) (30) (0) (450) ---
12_
480
0.025
All determinations of airborne asbestos fiber concentrations were made by the Industrial Hygiene Laboratory using the membrane filter method at a magnification of 430X with phase contrast illumination.
DATA SHEET CHELSEA PROVING GROUND
ASBESTOS MONITORING
ASBESTOS (fibers/cc)
Permissible Exposure Limit
0.2
8/17/89 - Vehicle Test DepartmentGeorge Burns, 370-36rll2&. _________
<0.02
The above sample w*s~corHseted-on a cellulose ester filter, utilizing
a MSA Model- -'G~ pump with analy.sxs_by phase-contrast microscopy in the Chrysler
Industrial Hygiene Laboratory.^ .
--- ...______________
CPGBRAKE.GFW
DATA SHEET CHELSEA PROVING GROUND
ASBESTOS MONITORING
ASBESTOS Fibers/cc >5 microns
Permissible Exposure Limit Action Level----------------------
0.2 0.1
10/12/89 - BrakV^nspegClron"Operations
Mike PoxsonV 298-58-5984 Driver/MecHahic" '
<0.03
The above sample waS^'cMIeeted* on an asbestos collection cassette using a calibrated MSA Model "G" pump with analysis performed at the Chrysler Industrial Hygiene Laboratory.
CPGASBBR.GWF