Document 919DpwGRMgor24E1jro7rvXvV

FH*Cod* 15=1555 ' ' 0,p*Mfflkgr '&*** J. L. GulishChemical Pr5ducta_ ___Chemica 1 fat*. Nm " 0pannm Otvnion L._P. Gendernalilc__Industrial Hygiana Parsonnal &ub|act: Asbestos Survey Oat* November 22, 1972 Han't/SSie# CIMS Num*i< Trenton Chemical ____ Ptant7ottic* <***' '6r Chrysler.Center________ On Novatnbar 10, 1972 a determination was mada of tha exposura of workers Co asbascos dust whila loading rasin-grade asbascos inco cha Day Blander. Tha rasulcs of chis scudy are shown on cha accachad daca sheec, and indicace chac exposure Co asbascos dusc during chis operacion is well below che threshold limit value. It was observed chat cha worker vacuumed his cloching immediacely afcar handling cha asbascos, using a dturntype industrial vacuum. However, a visible cloud of dusc was observed co pass chrough cha filcer bag of cha vacuum, unnecessarily increasing his exposura Co asbascos dusc. Therefore, ic is recommended Chac chis vacuum be connected co cha exhausc ventilation systems in cha area, or, ac a minimum, chac cha filter bag be replaced at regular intervals in order co ensure chac che vacuum does noc become a source of airborne asbascos fibers. Accachmenc t.9* L. P. Gendernalik Industrial Hygienist cc: W. F. Bavinger R. F. Bowers W. T. Diehl D. L. Eschelbach R. T. Gaskill J. J. Hogan T. J. Lang E. R, Lombard R. D. McIntosh, : F. E. Repucci E. F. Ruiz, M. D J. G. Shepherd N. A. Trombley M*110"7S7S A*v. 10-0 Data Shaat Trenton Chamical ////*> /7i Asbaatos Dust Expoauraa Location Threshold Limit Value 1976 Proposed Threshold Limit Value Breathing zone sample Day Blender Loadec<9HiHM^^) General area sample, 20' southeast of Day Blender loading station Asbestos Concentrations fibers (>5>)/cc 5.0 2.0 0.25 0.32 Samples were obtained on cellulose ester, Type AA membrane filters,and analyzed by phase-contrast microscopy.