Document 71MRxarnppL5pxXrnbMmZkgpR

T Mr. Dean Wilson General Superintendent Homestead Works Nk w. c. Janes, Manager Environmental Health Asbestos Survey forge Shop As reguested, an Environmental Health survey was conducted on March 29, 197$ et the forge Shop of the Homestead Works by T. M. Civic, Environmental Health Engineer. The purpose of the survey was to determine if the aluminized asbestos apparel worn by the scarfers during scarfing operations constituted an asbestos exposure. The present OSHA standard for' exposure to asbestos dust i? 5.0 fibers, longer than 5 micrometers, per cubic centimeter o'J air, based on an 8-hr. time-weighted average exposure, on July 1, 1974, the t-hr* time-weighted average limit will De reduced to 2.0 fibers/csr of air. OSHA has recently proposed to further reduce the daily 8-hr. average exposure limit to 0.5 fibers/as3 of air. The time-weighted average ejassures. of the scarfers monitored during scarfing operations were found to be well below the present federal standards, as well as the proposed^osHA ' limit ot~6.i Xibers/CST or air. Airborne asbestos concentrations ranged from 0.04 ibert/cm3 of air to 0.19 fibers/em3 of air, while time-weighted average exposures of 0.04 fibers/ca3 of air and 0.04 fibers/cm3 of air were obtained for the two scarfers monitored. These test results indicate the aluminized asbestos clothing worn by the scarfers releases asbestos; consequently, the scarfers are exposed to aabestos filters and should be included in the annual medical monitoring program outlined in Federal Register, Vol. 39, Wo. 123, June 27, 1974, Section 1910.93. The asbestos fibers probably become airborne when the coat is put on or ramoved, a sample taken after all operations had ceased indicated there was no exposure to asbestos after opera tions had ceased and the coat was no longer handled. TMC/mdd Attachment W. C.?knes USX0002266 \ 4 r: aOkDk aaa 5f5S 5552 O O OA ?JS ^<*0 5faJ*S OOO 4rt^ OOO 0 0 00 5 5 Sag 00 n i0 .aM4 0C 0 0 0fa a 535 aaa 3a 3a5a 000 M b e ito i >o > sz f ifa C <0 I 4 *i a 2 f0a fa raI U an 9 eu X 1115 f0a fNa fNa 0 111 am4 -m4 -m4 fea fca fea oG* 0c*4 c*4 eH 2ifta S fi-4 _ f3a f3a f3a U0 OC' <4*4 "M2 0 0 0 2 0e1 c99e *O hfoa 0e*0e* ae H<4>4 w w b c o fa fa fa 000 1 ??0 ? 5O' 0k D> 0kw CCSb 44 fa -4 .0 0fa4 0f4a 0f4a 6a 000^ 0 0000 am>a ok fwea wfcaifuac f0a f0a f0a 83 l3 3 SSv JB bl 0 K1 < fa - * e 4*m2 50fa OA*'. 0IAO 44 44 M O eo n fa a tn nin 44HO 4 OOO fl M O rk m rx N ffaa -4fa1 00 04 ku O0 Ok n K 0 u \ 0fa f0a 09 <A*4 J44t 04 04 u 0T Oe oo 11 fa fa *94 I0M fa fa 00 oV n 03 m4 CM 00 0a a 0 fa o 2 fa <- < o0 3CL 3 O fa fa k *4 fa 0 0 0 0 fa fa fa faj a 0 fa 0 0 23 43 fa *0i JS 0O04' fOa' 00 ** 11 00 G -4 aE4 (4 USXC-0022 6 7