Document MM11XG3kaaayjaBj7BXGk3kaV

BASK WOMB Industrial lelatlone Daft. T. J. btatr, Safety Seper. Seat Pittsburgh 2-O-i n s=r H*7 7, 1973 oo eet Hlooufleld Works - Accident Tyrant Ion - X. T. vniim, m-r. Main B--dfpirtf Industrial Hygiene received eight air "rl-- frost you an April 30, 1973* 1b* Maq?le idastlflsntlan ihMti indicated tint three location* enr* --pled for three different eoataalnanta. thl* latter will eaaflsa the reeults aa--ilonted to you hy telephone. Aebeetoe Saaplen (Sample Sos. U112-1115) Four saeples way received end were Identified hy you aa being during Billing, drilling, and aewlng operntlona on a trenelte aaterlal called tarlnlt* from the John* Murrlll* fln^any whleh conelets --<"iy of aabeetoa, aenat, etc. All four ee^lee were groesly over-loeded, aad - quantitative eweluatlaa wan not at leapt ed. A eeetor of the filter* n excised, and a aerphologle arealentIon of the reeldoa wan ande by pfaaee eontrmat aleroaaopy. thl# teat eeaflraed grosa aebeetoe nnntealnatlnn Tear atateaaut that a eon aebaatoa substitute aaterlal wan aeheduled for teat wm good to hear. We hope the teat la successful. If it le not, we etrongly agree with your ewittaent to "fhrelng out" the wort. Ae aantloned during our conversation, we empbatlcelly eoeouruge an all-out clean-up effort of thl* area a#lag r^e nrthode dleeueead. Duarte Saaplss - (Sample Nos. uict-Mo-) The two samples deelgaated by you ae baing taken at tba leaar quarts cutting station warw weighed as 99*4 erywtalllne allieu. Vhea related to the walaae of air sailed, the remote were 0.11 and 0.61 amici -- of quarts per cubic eater of air (ag/lP) respectively. the threehold llxdt mine (1X.T) for quarts duet eat by federal regulation* for an eight hoar the weighted away (tWA) awposura la 0.3 ng/ld. far thl* raaeon, we strongly endorse your effort* t* hawa the ventilation eyeti iaproved to sapeara all f the duet. ii ea ISS t=^ Kataor 2 7, 1973 VaaaAlf Paataatldo W--pi-- . (Sanple ITos. U*10-4411) Identified bjr you muilM pawtogldo (Tff0 ) dust as suofc. When mated to tbs air iqIom y--twitted, bteoltohsMthneiiUaT for oaa*teelaScU/voturti*Swwrfh0t.h5lo*wVImj/Wla,lasdossadmmi5Btthll%y r 1stoatloo to racn--aA additional aoeloeures irrad tbs dost Vo bopo the-- air a--pla results vlU aid your efforts to owrlneo your --aaga--nt to follow through oo tho reco--Motions dlaeuaood above. John F Ada-- Headquarters Industrial Bjrgiane