Document v6Vn1BEQKLY8M97by10NdE8L6

DU 004204 I* ___PAINE ,Ja6otatoti46vK. rmomAvt* tfONrauM.uraNi ^<jn E. I. DuPont May 18, 1983 *9 Two (2) filter cassette sauries and one blank wars received from E. I. DuPont, Beaumont works, Beaumont, Texas for asbestos fiber count- analysis. Due to excessive loading of airborne material on filter 52-1, conventional analysis was considered impractical. This filter was then examined via Polarized light Microscopy for asbestos identification and content analysts. .* * I i i *. P & CAM METHOD 239 Sample r Fields identification lObserved Blank 5Z-6 52-1 . ioa 20 * 'Fibers Observed (>5" u) Fibers Air Row .per (liters/rnln.) Filter Volume 1 2850 #5 154 2,194,500 -,.MW Fibers per .v-.c.ci'afU' Air - - 05 tff) . ,.*V 7* Asbestos identification and content a'wnalysis via Polarized Light Microscopy. i /A A portion of filter 52-1 was prepared for analysis following P S CAM Method 239. Analysis of the sample confirmed that in excess of .50* of the "DUST* collected on filter 52-1 was chrysotlle asbestos. The attached photographs were taken at 40X, 200X, and 400X magnifications. * unable to read. due. to excessive loading. ** These aneTyses were included at the request of Dr. Berlin Cassidy, E.I. DuPont, Beaumont Works. Jgnny H. Vickers Chemist Arr*rr* f* t**** \ c-- /*'/*! 83-896 OUP 0508193 J DU 004205