Document np01jOO8BnwnM52b8LBOLoGz
FILE NAME: Chrysler (CHR) DATE: 1980 Feb DOC#: CHR096 DOCUMENT DESCRIPTION: EPA Report - Asbestos Product Test Results
U.S. ENVIRONMENTAL PROTECTION AGENCY Office of Pesticides & Toxic Substances Washington, D.C.
Submitted in Partial Fulfillment cf Contract No* 68-02-3163 Technical Service Area 3 Work Assignment No, 2
EPA Project Officer Richard Guimond
ASBESTOS PRODUCT TEST RESULTS
Prepared by:
Nancy Roy Paul LaShotc?. David Cogley
February 1980
GCA CORPORATION GCA/TECHNOLOGY DIVISION Bedford, Massachusetts
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SAMPLING CF 3RAXE REPAIR WORK
On September 21, `1979 samples of ambient particulate were collected in a garage while brake work was being performed. A representative of Nilfisk of America was present to demonstrate the value of Nilfisk control equipment in brake lining repair work. Sampling was permitted on the condition that the facility and its location remain anonymous.
Three types of ambient samples were collected:
In the garage away from the workspace (background levels).
Near the workspace while Nilfisk devices were in use. Near the workspace without any controls.
Table 1 shows the result of analysis of such samples by Scanning Electron Microscope (SEM).
TABLE 1
BACKGROUND LEVELS OF ASBESTOS
SAMPLING LOCATION
About 25' from workspace
About 55* from workspace
DURATION (Min.)
60
60
SAMPLING FLOW (Xpm)
2.2
2.2
FIBERS 4 4
FIELDS 130 450
CONCEt (f,
o.;
0.1
Samples away from the workspace were collected during brake work taking place inside Nilfisk control equipment* They would typify fiber levels in the garage from day to day since, as Table 2 shows, fiber re lease when the Nilfisk devices were used. Release may be seen to be minim
i
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Clearly, the one fiber collected during the Nilfisk controlled work could have come from background contamination.
Two sets of samples were collected near the workspace when brake work was being done in the usual manner, without Nilfisk controls. First, a brake housing was removed and cleaned by being struck repeatedly with a hammer. Second^ the worker opened a brake housing, cleaned it with a jet of compressed air, then swept up all the debris which had accumulated on the oarage floor. Employees and supervisors gave assurance that these procedures were routine*
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SAMPLING LOCATION
On Nilfisk exhaust vent during front brake work
On Nilfisk exhaust vent during front brake work
On worker during both front and rear brake work (above)
On Nilfisk exhaust vent during truck front brake work
On worker during truck front brake work
8* from truck front brake work
On Nilfisk exhaust
TABLE 2
AMBIENT LEVELS OF ASBESTOS DURING NILFISK-CONTROLLED WORK
pURATlON '*(Min.)
SAMPLING FLOW U pm)
FIBERS
10
2.2
0
8
1.9
0
%
25
1.9
1
5
2.2
0
15
2,2
0
22
1.9
0
10
2.2 .
0
FIEI45S 350 390
550
420 470 400 330
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SAMPLING LOCATION Clean Housing by bangings On Worker 3* from Workspace 10* from Workspace 25* from Workspace
Clean Housing with Compressed Air: On Worker 3* from Workspace 10* from Workspace 25* from Workspace
TABLE 3
AMBIENT LEVEES OF ASBESTOS DURING ROUTINE BRAKE WORK
DURATION (Min*)
V
FLOW (1pm)
FIBERS
14
2.2
14
14
2.2
l
14
2.1
3
14
2.3
0
13
2.2
12
10
2.2
7
10
2.1.
6
10
2.3
FIELDS
320 150 105 3UQ
450 390 400 400
Oust dispersed more rapidly and extensively with compressed air cleaning as the results 25 feet from the workspace indicate.
Three samples of dust were also collected during garage visit: 3rake dust - rear brakes. * Brake dust - truck front brakes Overhead dust on rafters
Optical microscopy did not reveal, any asbestos in these samples. Brake dusts were primarily quarts and carbon, while overhead dust was almost entirely cellulose. SEM analysis revealed a small number of very short asbestos fibers among these more visible substances.
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