Document B8VqE6YLed3BnRg2eoEXZqMYX

____ PAINE Ja6otatoiL6daic., tobomaw. tATOMnouacuATont dfaf a -hs E. I. DuPont May 18, 1988 'L Ofay-aJLut** Two (2) filter cassettdTamples. and one blank were received from E. L. DuPont, Beaumont works, Beaumont, Texas for asbestos fiber count - analysis. Due to excessive loading of airborne material on. filter 52.-T, conventional analysis was considered impractical. This filter was then examined via Polarized Tight Microscopy for asbestos fdentificati and..content analysis. ' i -/; f)nU/*4^ P k CAT METHOD 239 ... ----- ^ Flberjper *-''-'Fibers' Fibers,;' Airflow (^,c.c:?aliU'- Simple v-FieTds .{"Observed. . per w.(Titers/rairr.) '. -.ri.'-fAIr . . Identification OQbsarved ' f>S~ urn) FiTterv Volume ( '.''l.k?'>Ema) jLi.. rT*.' ..'* .-: - -2-.. -.BTank. v :; TQtt . .`.V 1 ' 285a.' ~ . .1 5ZS 5Z-T 20 T5* Z,,T9*,50O **Asbestos identtficatton and content analysis via Polarized Light Microscopy. - >v .; , .. ' ~ -- " ' y.4'.ii>-' 1- A portion of ffTter 52-T was prepared for analysis following- P 5. CAM Method: 239. Analysis of the sample confirmed that lit excess of ,501 of the ______ * T . iW.a: viijj.r-.; ` !* ` "DOST* corrected on fITter 52-T was chrysottle asbestos. The attached photographs ware taken at 40XV 2Q0X', and 4O0X magnifications. * * . - ..`r-re*4 ' . * unapfe to read due to excessive loading.. " ** These analyses were included at the request _. , of Of- Berlin Cassidy, E.I. DuPont, vVk-^v Beaumont Works. Sr"/ fJgnny H. Vickers ( Chemist ****- r c^- a~ ^ DUP 0508184 dl 83-89E DU 004196