Document LKybr3KGbKOJLppEvLabwbpk5

FILE NAME: Visible Dust (VDT) DATE: 1965 Apr 9 DOC#: VDT018 DOCUMENT DESCRIPTION: Memo - Industrial Hygiene Committee Meeting H. A. g g S K M . vetoes -*+AM?-.V S S S i ^ 19S5 ".' ?r* CUKFiDESTXAL .'l*-** !ft fa-g, f . cmia&sr -8^A$a-4#eEMB- T Copy to: Sr, L. ley - .Pittsburgh "*m HE; rsmgTRIAL BTSIEHE C Q M TTa MEgflHS Tte loilustri&X H^glese Casaittee sset en April 6 with the following present; H. A. Seanken, J. H. Greeaes E, V. Qatendorfj a M H. D. Franklin, Occupational Exposure Canes: One case w i reported to the First Aid in February and one ease in March. Both were the result of exposure to chlorine gm in Bldg. 3 & . The exposure la February wan due to a leak at a ha connection and the search exposure was due to a leak from a faulty hose. It is our understanding that a governmental agency la Austin has been eost&efeed by the president of* the local union regarding the chlorine exposure in Bldg. 3^ F Level: The fluoride content of vegetation within a 2 - 3 mile radius of the Plant averaged It ppm in December and l6 ppm in both January and February. While these values are somewhat higher than those obtained in the immediately preceding months,, they are about normal for thin season of the year and are within what is considered to be an acceptable range . Rainfall in the above months amounted to l.or, 2.63j and 5-6G laches respectively. Lunch Rooms and Toilet A r e a s : An RFA will be submitted this quarter to sake the revisions to one of the toilet-lunchroom areas in the potroom center passageway. Saffiglihg and asaJytieaX work in eonneotion with tbs q m r t e r test progra is aasplets. Besults will be availabla withi a few ARCH 10777 rr-sr: H. I*. Ghriseo April 9, 19^5 Scrubber System; Cleaning of the lines is apprcodastely 3 of complete. Tba dis charge header at Bldg. j6 has been Installed and the main header has been cleaned fTOfi J6 to Just south of Bldg. ho. "Use reaction tank at BlOg. j6 is eaaentisJLly cleaned. The mixer is this tank haa been massed for repairs and the issuer nixer bearing is yet to be replaced. In sailing these repairs, water has been ahsit off the scrubber syutera for 106 hours, Yet to be els&zml ares the sain feseder from Bldg. ^0 to Bldg. 6, the laterals to all scrubbers, and all spray headers and nozzles. This will require approxiaately 15 days, tfae of Asbestos in Potlinlna Operations: The following eoasesits are la response to a request for information on this subject by patliaiag personnels Asbestos!#, & disease resulting only from breathing asbestos dust, is now recognized as a sigrd.fieant industrial exposure hazard. Eves intermittent exposures t high concentrations, over long periods of tine, can result in varying degrees of asbestosis according to Individual susceptibility. There have been reports of increased incidence of lung cancer in persons with asbestos is. Recommended eax- iajua atmospheric concentrations (8 hours) is 5 aillion particles per cubic foot of air. Exposure is best controlled by local exhaust ventilation or, far alttent exposure, an approved respirator. fflbUs it is doubtful that asbestos dust is generated in potlining operatises* to present a health hazard, proper precautions should be observed when dusting doe* occur. J Dryer Stack Clean-up; Twenty-three tests were conducted on the 3"tube, Koppsrs pilot precipitator during January, February, M Hferch; seventeen of 'tee testa were s&&@ with the precipitator operating as & dry unit, and six as a wet unit. Besults of the dry bust testa show a Xm effleiaasy h further work, is planned oe this basis. Efficiencies, operating on a wet basis, are sufficiently high to warrant running another scries of tests. These will bsgta about tbs middle of April. Sb shell for the 3-stage Western ipdtator will be completed in April. Sba internal A RCH 18778 Mr* a* Wo &o@ April 9, 1S6S l*a@a 8 paite are scheduled for e2itor$ boot the sd,dj of j u . m hope to t^-ve the jLp>jL''os0 & ci sus if^sL^l^r te r tia g toy the 15th o f July. I. A. m S H EASS FU eoggr routed to s Masar* 1 . A . B arer S . S FfcankHa R. S* Herabeek ! E. W* Oetasrf <J. H. teees C. L. VfeisHfcise ?. K. Har ARCH 18779 ? T--', ---- -.'TT??."???g^uJ'.-MmUBW..'.IIU*IWg. . /-.-W.W.tiMftSMB1