Document gDpn3DjB6D8wXG1aZxmM4LoL

THIS COPY FOK L. V. IKAJU^e-i li D LSS O. COLWELL, M.O. ETTS8URGH OFFICE Confidential MR. H. A SEMKBN ROCKDALE WORKS April 2, 1968 !t EXPOSURE TO ASBESTOS DUST lease excuse my delay in answering your letter of March 7, 1968 concerning the above noted subject. In view of the increased interest of unions and government in occupational safety, hygiene and health, I think you can expect more inquiries such as that of Mr. Clark. There is no way we can prevent employees from contacting outside people other than by improving our own programs and conditions to the point where they have confidence in us. Even if we were perfect, a few would still question our integrity. In my opinion, you should be living within the threshold linit value for asbestos. The only exception to that should be for special circumstances of operation where such would be impossible or impractical to accomplish\ then a protective device would be in order. Certainly the general environment should not be so bad as to require respirators. MILES O. COLWELL, M.D. MOC:DB L.V.Cralley, Pgh 4