Document rpoQVYGo08wbNM2EL8VxXKxgJ

P.SvJU?: ESTPAINE ^JaboycttotieA inc. 7979 GSRI AVE BATON ROUGE, LA 70820 ASBESTOS FIBER COUNT ANALYSIS for lab DOW CHEMICAL COMPANY Post Office Box 150 Plaquemine, Louisiana 70764 ATTENTION: Jackie Paul November 10, 1988 \ A DOM DO A CONF1 A! 88-7593 WEST-PAIN E ^\Ja6otatcnie6 inc. , 7979 GSRI AVE, BATON ROUGE, LA 70820 DOW CHEMICAL COMPANY Plaquemine, Louisiana November 10, 1988 Ten (10) filter cassette samples were received on November 8, 1988, from Dow Chemical Company for asbestos fiber count. Fibers larger than 5 microns in length were counted by means of phase-contrast microscopy at a magnification of 400X. The procedure recommended by NIOSH Method 7400A was followed. Pertinent information regarding fiber counts is as follows: Field Area: 0.00785 min (Walton Beckett Graticule) Effective Collecting Area: 385 mm^ (25mm Cassette) 855 irm (37mm Cassette) Limit of Quantitation: 10 fibers/100 fields Limit of Detection: > Average Blank Count * Detection limits are based upon a minimal concentration fibers/mni . of 7 Sample ID. Fibers (>5um) Observed No. of Fields Observed Fibers per Filter Volume of Air (L) Fibers (>5um) per c.c. of Air 08409 (#1) 08410 08411 08412 08413 09020 09023 09024 09225 V. 13 100 5,640 2 100 <490 2 100 <490 4 100 1,226 54 100 24,749 15 100 6,621 6 100 2,207 20 100 9,073 00 A 11656? 00NFTDFNTTA1 J WEST-PAIN E ^JahouxtoiieA inc. - 7979 GSRIAVE. BATON ROUGE, LA 70820 N DOW CHEMICAL COMPANY Plaquemine, Louisiana November 10, 1988 Sample ID. Fibers (>5um) Observed No. of Fields Observed Fibers per Filter Volume of Air m Fibers (>5um) per c.c. of Air Blank Blank 3 100 0 100 BLANK BLANK *Less than the limit of quantitation. (#1) Unable to analyze due to high amount of particulate matter. Blank corrections made at fibers per filter calculations. Laboratory Director DO A 11 CONFIDENTIAL, V.