Document oMRbjrN5mQX8wYvwLj5a1RwZ8

^ gugr l* gporg CORPORATION 7035 Commerce' Circle Pleasanton California 94566 [415J 462-2230 L December 26, 1973 REF: MCP 73-298 Hearing Clerk Food and Drug Administration Room 6-86 5600 Fishers Lane Rockville, Maryland 20852 Dear Sir: We are responding to your invitation to submit written comments concerning the notice which appeared in the Federal Register on Friday, September 28, 1973 - "Asbestos Particles in Food and Drugs". The enclosed report, entitled "Removal and Detection of Liquid Borne Asbestos Fibers with Nuclepore Membranes" by M.C. Porter and R.G. Berggren, is submitted in quintuplicate for your examination. If there are any questions concerning the report or the specifi cations of the Nuclepore membrane, please do not hesitate to contact the undersigned. Very truly/yotars, M.C. PORTER, Ph.D. Vice President Research and Development MCP:cs Enc (5) cc: A.R. Casola "/TP-cuU