Document RpY73RRgNZnb6p0nG9pDpD0Rk

FILE NAME: Kaiser Aluminum (KA) DATE: 1969 Sept 9 DOC#: KA003 DOCUMENT DESCRIPTION: Letter to Kaiser Aluminum from JohnsManville RE Cutting of J-M Asbestos Material - ;v **. .. L .fo U W b lx JO HN S-M AN ViljtE- M SIAftCH * N CIN EJ1N C C E N T ** 9.0. KM m M 1 OHM ,WQMQ^i. I2M0W Mb ' IqiMto 9, 1969 *Hr. 1. B. Oikm fofttj Supervisor Balsar Aluminum A Phonical Corparatloo Newark Hocks B. 0. Bos 671 Newark, Ohio Boor Mr* Gibson: Yomr lotear of August 29, 1969, addressed to oh has bean rafanad to aa for reply. Before.! can advise you on the euttlag of the Johns-Msnvilla asbestos aaterlal you are presently using, X will need to know aora about the natarlal la question. If you could prvida ue with our erado nana for the aaterlal or the purchase order specifieationa, X will than be able to prepare proper maneota. The American Conference o Governmental Industrial Hygienists has proposed a aaw Threshold Limit Value for airborne asbestos fiber duqt concentrations. The new TLV la 2 million pareieles per cubic foot of air whan sampled by the impingar method and particle count made by light microscopy at 100X, or 12 fibers per cubic centimeter of air whan sampled by the aanbraae filter technique and fiber counts nado under phase contrast light microscopy at A30K. Xm our own plants, wherever possible, at any operation that ganaratea asbestos fiber dust, we provide mechanical ventilation equipment to maintain the dust concentrations below the proposed new TLV. In these instances whsre mechanical duac control cannot bo provided, we Insist cfcsf tur ampleyeos wear a Bureau of Minan approvad respirator. Vor your further inforastloa, X an including two position papers preparad by JOhnsMaavllle entitled "Asbestos and Hunan Health" and "Asbestos -- A Family of Minerals". X am also enclosing a booklet prepared by the national Insulation Manufacturara `Association on tecoanandad health safety practices for handling and applying thermal insulation products containing asbestos. It further information la usadad, pisase do not hesitate to contact me. Vary truly yours.