Document DD64qMVabJq5GLD7Qew5pNGEn

FILE NAME Talc TALC DATE 1973 Apr 10 DOC TALC302 DOCUMENT DESCRIPTION Air sampling results for asbestos exposure from sanding DuPont paint primer that contained talc oe we 8-2 0 NDA sSeak;n9s $a Ee A ES CmUNNDUITSpIRNeic UNCnT: : cy SSN .a FV 10..s itor, NEMOURS E. I. DU PONT DE tec WAT & COMPANY WILMINGTON DELAWARE FABRICS & FINISHES DEPARTMENT DEPARTMENT RESEARCH & DEVELOPMENT DIVISION CC R. J. lubiak F. T. Johnson - Haskell Lab T. R. Matthews April 10 1973 PLAINTIFF'S EXHIBIT DUP J. A. ZAPP JR HASKELL LAB ASBESTOS IN TALC We have conducted some brief whether asbestos is released when one ofexpou er riments to determine primers is sanded The results are containing summarized in the attached letter from T. J. Nelson fibers shorter than 5 microns on the lungs Do you feel the hazard potential is sufficient to characterization of the dust warrant further that ... ... ... ... ... 1 Fore 1 we CS ae aa eT 4 y E. E. SWAIN JR EES ps RECEIVED RECEIVED RECIVED & MEANS Safety FIRST & FOREMOST DUP 1141180 1141180 DU 058668 fc ute Oe 64 ee ... ... 38 E. I. DU PONT NEMours & COMPANY INCOATLY INCOATLY INCOATLY FABRICS & FINISHES DEPARTMENT . CC R. S. Diem Mar. Lab E. E. SWAIN JR 2373 WALMINGTON Marshall Marshal D Laboratory April 4 1973 LINE PREPARAKOT EC SANDING DUST Attached is a summary of the experiments I performed to determine the of airborne bestos in sanding dust from Line Preparakote Preparakote amount The level in general is within 1976 OSHA OSHA standards for asbestos longer than 5 microns - time weighted average Unanswered still 2 fibers are ' The amounotf encapsulated asbestos in the the respirable dust @ The effect of the encapsulated asbestos on the lung tissue a I do not know how to determine the amount as the proportion of tale and encapsulated - one guess - would put the maximum asbestos in the paint solids However the amount is less than that since we do not count fibers less than 5 microns in of the respirable dust would be less then 5 length and going to be significant portion microns in diameter If we can be of further help please contact me 4/4/73 ATTACH PROCESS CHEMISTRY SECTION MANUFACTURING SUPPORT GROUP ry THOMAS J. NELSON CAF eva: & Fournour DUP 1141181 DU 058669 ei 1 Mabe, | ie TBMen Lotg ese ass Ss SUMMARY SANDING SAMPLES 11 - Taken at refinish training center while operator sanding fender Asbestos -2.3 -2.3 fibers 7 fibers fields 12 - Taken while sanding panels laying flat on bench top Filter was 6 inches to the side and 2 inches up from bench 80 of dust particles flowed below filter Asbestos - 1.6 fibers 2 fibers fields 3 - Taken while sanding on bench top Filter 3-4 inches above sander Asbestos - 3.2 fibers 3 fibers fields NOTE 1976 OSHA limit is 2 fibers in sample # - 6 hours sanding at this level would meet the 2 fiber limit and 3 - hours Sample 3 was probably higher in dust than operator would receive since the sample wc close to source In both cases - sanding for longer than 5 hours would be unlikely in a refinish shop DUP 1141182 DU 058670