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ASBESTOS FIBER COUNT ANALYSIS
for
DOW CHEMICAL COMPANY Post Office Box 150
Plaquemine, Louisiana 70764
ATTENTION: Mr. Terry Campbell
February 14, 1986
DO 0H^04 CONFIDENTIAL
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7979 GSRI AVE. BATON ROUGE, LA 70820
DOW CHEMICAL COMPANY Plaquemine, Louisiana
February 14, 1986
Fourteen (14) filter cassette samples
were received
from Dow Chemical Company for
asbestos fiber
count
analysis on February 12, 1986. Fibers larger than 5 microns in
length were counted
by
means
of
phase -contrast
microscope
at a magnification of 400X. The procedure
recommended by NIOSH Method 7400A was followed.
Sample ID.
Fibers (>5um) Observed
No. of Fields Observed
Fibers per
Filter
Volume of
Air LL}
Fibers (>5um) per c.c. of Air
05712 05711 05713 05714 05719 05720 05722 05723 05724 "^07002 07034 1
11 - 1 = 10 6 -1 = 5 4 -1 = 3 3 -1 = 2 4 -1 = 3 7 -1 = 6 2 -1 = 1 4 -1 = 3 7 -1 = 6
10 -1 = 9 1 -1 = 0
nal
100 100 100 100 100 100 100 100 100 100 100
4,905 2,452 1,471
981 1,471 2,943
490 1,471 2,943 4,414
<490
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DO 082049 CONFIDENTIAL
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