Document 3eJBdQ6Qd7oe6J4LkBQ3LzL06
FILE NAME: Chrysler (CHRY) DATE: 1980 Feb DOC#: CHRY096 DOCUMENT DESCRIPTION: EPA Report - Asbestos Product Test Results
a.S. ENVIRONMENTAL PROTECTION AGENCY Office of Pesticides & Toxic Substances Wasnir.cton, D.C.
Submitted in Partial Fulfillment cf Contract Mo. 63-02-3168 Technical Service Area 3 Work Assignment Mo. 2
EPA Project Officer Richard Guimond
ASBESTOS PRODUCT T?ST RESULTS
Prepared by;
Nancy Roy Paul LaShot<y. David Cogley
February 1980
GCA CORPORATION GCA/TECHNOLOGY DIVISION Bedford, Massachusetts
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SAMPLING CF BRAKE 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 worksoace
DURATION (Min.)
60
60
SAMPLING FLOW (lpm)
2.2
2.2
FIBERS 4 4
FIELDS 130 450
SEM CONCENTRA'
(f/cc)
0.21
0.06
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 minimal.
/
t
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Clearly, the one fiber collected during the Nilfisk controlled work could have come from background contamination.
Two sees of samples were collected near the workspace when brake work was being done in the usual manner, without Nilfisk controls. First, a brake nousing 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 carage 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
B1 from truck front brake work
On Nilfisk exhaust
TABLE 2
AMBIENT LEVELS OF ASBESTOS DURING NILFISK-CONTROLLED WORK
puRATION ''(Min.)
SAMPLING FLOW (1pm)
FIBERS
10
2.2
0
a
1.9
0
25
1.9
1
5
2.2
0
15
2.2
0
22
1 .9
0
10
2.2
0
FIELDS 350 J90
550
420 470 400 330
SKM CONCENTRATIONS
(fAc)
0 0
0.03
0 0 0 0
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SAMPLING LOCATION Clean Housing by banging: 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
TAULE 3
AMBIENT LEVELS OF ASBESTOS DURING ROUTINE BRAKE WORK
DURATION . (Min.) V
FLOW (1pm)
FIBERS
14
2.2
14
14
2.2
1
14
2.1
3
14
2.3
0
13
2.2
12
10
2.2
7
10
2.1
6
10
2.3
1
FIELDS
320 150 105 380
450 390 400 400
SEM CONCENTRATION
(f/cc)
1.29
0 .2 /
0 .00
0
.
0.85 0.74 . 0.85
U . 10
Dust dispersed more rapidly and extensively with compressed air cleaning as the results 25 feet from the workspace indicate.
Three samples or dust were also collected during garage visit:
3rake dust - rear brakes.
'
3rake dust - truck front brakes
Overhead dust on rafters
Optical microscopy did not reveal any asbestos in these samples. 3rake dusts were primarily quartz 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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