Document Vjb4G0Q5wM43LnEpQ4zEDqV9w

cc: J. H. Om-rtai, ICO, > 17366 June 14, 1973 C. H4TT30B IMPOSTHIAt CHMC6U fimXDODCT lUioio run ariptos sctvrr On 6/6/73, Air soup las wet* taken to determine ubtitet concentrations at a boImt of operations -using asbestos-containing uatsrlels. The results Ui shown oa eh* accompanying tabla. 4a approved air purifying respirator vaa worn by the Insulator during aabaatoa removal operations. Kacept for ona eaaa, eba Insulation being rTi1 vaa vae. Tha vacaaas waa a raaulc of deteriorated gaskets la eba flange or nlvt. All raaowel vaa dona ouc-uf-doors and tba Insulator at all tlnaa triad to heap upvlad of eba operation. Tba total elaa for sanplae 1 aad 2 (about 20 alamtso) la tba average ebat any ona insulator would spend removing aabastoa aaterlals. I moved aabaaeoa vaa placed la paper or plaseie sags at eba oparaelon ales. This should ba a regular proeadura for all Insula* tors, but plastic bags that ara scaled wbuld baetar eoaerol tha hasard. Za preparing eba vulva cover aat - fiber glaaa between asbestos sloth llttla dust was created from cutting or handling either aacarlal. Welders in eba oast bap complained ebac with tba building doers open, fiber glass ves blown coward tbea causing skin Irritation. It nay ba necessary to keep eba doors closed or alas employ a barrier ee keep couplalnts down. Immediate vacuuming of tba work benches aay also keep loose dust to a >1almas. Tba dust created during tba band sawing of aabaatoa pipe covers tended to be heavy aad dropped readily Into tha waste barrel. X have reservations about tba wetting procedure uaedou tba pipe covers when handled. Tha spray action tends to disperse tba loose dust at tba saaa cine that it is vetting tba surface of tba cover. Whom X originally suggested watting the asbestos prior to handling and cutting, I vaa thinking of a tubular tank with water la whlob tba lasulatlea coaid bo dunked. Considering all of tbs dally operations where aabeetoe la handled, actcber tba callggg(10 fibers/al) nor tha tlae<el$btad average (3 fibers/al) '355 would have been exceeded, lowevsr, respirators will have to be used la asbestos raaoval operation*. ORIGINAL SIGNED Y RICHARD l HUBIAK im/jtd enclosure R1GUJLS J. ttJlXAX usomiu. pemut DUP 0903217 121011 SC-DP-04345