Document VpZxEZmd7rmD88nG5nx9YO6p

.p WEST-PAIN E JabotatotieA INC. , 1^., i 7979 GSRIAVE * BATON ROUGE, LA 70820 ASBESTOS FIBER COUNT ANALYSIS \ for lab V, DOW CHEMICAL COMPANY Post Office Box 500 Plaquemine, Louisiana 70765-0500 ATTENTION: Jackie Paul October 6, 1988 no A 116557 CONT IDFIMT T AI 88-6651 J .p WEST-PAIN E JahoyaAcnceA INC. , 7979 GSRI AVE BATON ROUGE. LA 70820 DOW CHEMICAL COMPANY Plaquemine, Louisiana October 6, 1988 Five (5) filter cassette samples were received on October 5, 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 mm2 (Walton Beckett Graticule) Effective Collecting Area: ? 385 nmC (25mm Cassette) 855 miri (37mm Cassette) Limit of Quantitation: 10 fibers/100 fields Limit of Detection: > Average Blank Count * Detection limits are based upon a minimal concentration f ibers/min . of Sample ID. Fibers (>5um) Observed No. of Fields Observed Fibers per Filter Volume of Air (L) Fibers (>5um) per c.c. of Air 09017 09018 09216 09217 BLANK 13 - 1 = 12 7 -1 = 6 3 -1 = 2 87 - 1 = 86 1 100 100 100 100 100 5,885 2,943 981 42,179 p4iilip Wf WfSSt, ^pfvTlbo Laboratory Director DO A 11 A550 f ONF T OF FIT I At