Document ZqyJ8j7xv9QQz9oqvQVnOwK7

:tvV '-A '.V "***oy MANUFACTURING CHEMISTS ASSOCIATION tS2b CONNECTICUT AVENUE. N.W. WASHINGTON, D C. 20003 (202) 483-6126 April 17, 1974 TECHNICAL TASK GROUP ON VINYL CHLORIDE RESEARCH Subject: Report on Conference with Industrial BIOTEST Laboratories, April 15, 1974 Gentlemen: As a result of the telephoned information received by MCA from Industrial BIO-TEST personnel last week, a conference at the Northbrook, Illinois offices of IBT was set up at which an oral status report on the chronic in halation studies with vinyl chloride was presented to MCA, industry and federal agency representatives. Those in attendance, and their affiliations, are shown below: G. Bell, Jr. S. Cummin J. Fairchild W. Goode E. Gordon D. Harris N. Johnson, M.D. ynt Kennedy L. Keplinger J. Kociba L, Kusnetz V. Lassiter E. Rinehart M. Smith F. Stara < T. R. Torkelson R. N. Wheeler B. M. G. Zwicker R. F. Blewitt A. C. Clark K. D. Johnson PPG Industries, Inc. Borden, Inc. NIOSH Industrial BIO-TEST Laboratories Industrial BIO-TEST Laboratories UNIROYAL, Inc. The B. F. Goodrich Company Continental Oil Company Industrial BIO-TEST Laboratories The Dow Chemical Company Shell Oil Company OSHA Ethyl Corporation Air Products & Chemicals, Inc. U. S. Environmental Protection Agency The Dow Chemical Company Union Carbide Corporation B. F. Goodrich Chemical Company MCA MCA MCA DTH 000012916 Dr. Goode first presented the mortality data and gross observations, and then Dr. Gordon described the pathology observed in the mice. The data, as presented, are shown in the attached tables. There are apparent discrepancies between the total mortality data and the detailed listing of recent deaths. These will be re solved. No test-related pathology has yet been noted in any animals other than mice. Dr. Fairchild, of NIOSH, reported that Dr. David Rail, of HEW, had appointed a committee to coordinate departmental toxicology and related programs, and that under this committee there has been named a subcommittee to develop a "white paper" on guidelines for research to determine "socially acceptable" levels of risk. A report from this subcommittee, which will cover both philosophical and statistical considerations, is expected in the next few weeks. Dr. Stara expressed the view that the vinyl chloride problem presented industry with a unique opportunity to seek to demonstrate a "no effect level" of a human carcinogen with a sensitive animal model of well-doclumented validity. w 4 & Dr. Lassiter expressed a guarded judgment that the mouse data reported by IBT would not lead 0SI1A to modify the emergency temporary standard, but that it might well cause 0SI1A to accelerate the rule-making process for the development of a permanent standard. Dr. Lassiter also reported briefly on the retrospectivrjj morbidity and mortality studies being conducted by NIOSH/CDC * at nine or ten locations (six companies) around the country. I* No epidemiological data were presented. ; ' /.* In an afternoon session of the Research Coordinators, 'tJ it was agreed that the exposure of the mice in the present project should be terminated at nine months, but that { eft exposures of both rats and hamsters should proceed for the.-, V'7,j| initially-planned twelve months. It was further moved, seconded and carried that the chairman appoint a group to begin investigating the cost and availability of facilities of new experiments to be con ducted at lower levels of exposure, with larger groups cf , animals. He was asked specifically to seek to encourage the National Center for Toxicological Research, at Pine 3" *> A V4 DTH 00001291 -3- Bluff, Arkansas, to offer to undertake such a program. Details of the test protocol are to be left open until after the Rail committee makes its report available. The Research Coordinators asked MCA to call a meet ing of the Technical Task Group on Vinyl Chloride Research as soon as the report of Tabershaw-Cooper Associates on their epidemiological study reaches them. A copy of the MCA news release reporting the Industrial BIO-TEST mouse data has been sent to you in this morning's mail. Sincerely, Kenneth D. Johnson, Ph.D. Secretary Technical Task Group on Vinyl Chloride Research KDJ:mb Tables Attached cc : . .Mr. A. W. Barnes D. P. Duffield, M.D. Dr. Tiziano Garlanda Vinyl Chloride Management Contacts DTH 000012918