Document DMnyXeQmBdGL6KX98J3BL39QB

cc: Mr. Fran* Zimmerman, National Gypsum Company UNITED STATES GYPSUM COMPANY lit IQUlH CI 9 91111 CHICAGO. IIIINOI! 4 14 91 BY MESSENGER July 9, 1965 Mr. Vendell J. Brown Spray, Pries, Hough & Cushman 13^ South LaSalle Street Chicago, Illinois 60603 Re: Asbestos Exposure AttaeWedrfor your/Infbrmation is a copy of a letter we have receivedVroo Johne4<anville Corporation concerning their evaluatlorKop/atoeatos fiber exposures. Apparently Johns-Manville keya itsNpreveptive meaetfre'\to exposures in excess of a maximum allowable concentration $00,000 particles per cubic foot of air. It la very inte heir comments concerning the relationship of 'sure to asbestos fiber. I would be very curious oth,r "potentially toxic materials were that could have bofttrfbuted the conditions found by the cancer study. It wWld-he my re. ndation that you write to Dr. Kenneth Smith, Medical Dl; " ` phris-Manvllle for a more definitive explanation. .In the meantime, I will diteymind^wi major suppliers of aabeatoVto whe opinion. there are any other buld write for an Very truly UNITED STA COMPANY CPKJt attach. C. P. ^ipp Manager, Insurance 25061 : J\ : g 906307 TAB 15