Document VGr2ooOE6Q00pq8vop758KQRK

FILE NAME: Rogers Corporation (ROG) DATE: 1968 Dec 30 DOC#: ROG037 DOCUMENT DESCRIPTION: Letter to Rogers Corp. RE New Yorker Article u. L, Monroe b. ii* Fenner' 1 File Kr. C, K. Gorman, blr. f'urch. Kogers Carp. .ogoro, worm. 0C2U\ near hr. Gorman: j. copy of the New Jforker article of last October we discussed ct our last visit is attached. .'egardinc duet control, here are extract;, from letters written by J-K t&vironental control Uept.: "/espirators for protection against fiber dusts s}x.ul.-i be bureau of Mines approved fcr protection ugainst toxic dusts, not significantly more toxic than lea-. (Bureau of Mines schedule 2L-- or 21b). Our own plant people seen to prefer H3A ORS'Wo .7?. Other aanufacturers of approved respirators include ><aerican Optical end Willson. "I understand that your eonpeny wishes to take every precaution to insure the safety of your workers en gaged in the fabrication of naterials containing as bestos. She boat preBsutioc is Mohanioal dust control equipsent desljned to isintsin the airborne concentration &t asbostoa fibers belew the Threshold Halt Value eatsbliahad by the Anerisan Cooferenee of Oovoraoent* * ml Industrial hygienists. Ibis group establishes TLV's Ter airborne ecnoestrstions of different toxic oubetsneos which repreeeut condition* under which It is believed that nearly all workers say be repeatedly ex- CRMC-ELS-Rogers-Micro-000035 posed, day after day, without adverse effect, -'he newly proposed TL: for asbestos fiber is 2 Billion particles per cubic foot (2 Ki'C't') or 12 fibers per cc (12 f/cc). Asbestos fiber dust eeaoentratians re Measured la accordance with teskalquea established by the United dtatee Public health Service. Zhe determination of KPPCF requires collection of r-- by sa ifijpiager sad a subsequent particle count wider a 100 power light aicroscope. tbs f/cc count ia determined by Mwtysns filter sewplisg and subsequent fiber count under a ky> poser light vLeroeeope. These techniques are described in de tail in literature available Urea the U. 3. P. H. 3, Zf addi tional information as to sampling and analyaie la required, it can be obtained frou: Hr. Howard Ayer Chief avironaenUd activities Field Studies Occupational Health fregrar. oept. of Health, j-dueatio.>. t. Welfare 10lt Hroadway Cincinnati, Ohio *5202 A competent, experienced duBt control engineer ahonl.I be enployei by your concern to design the dust control system, including the hoods, duct work, fan and collector. It is essential thut your dust control system eaploy a high efficiency dust collector tc pre vent external atmospheric dust contamination. Very truly yours, h. Hoisclair HAB/ev Attach. CRMC-ELS-Rogers-Micro-000036