Document aJBpnxQ6d4XgMwreLExReNm5X

draft ACTIONS ON VINYL CHLORIDE EXPOSURE LEVELS ACGIH I American Conference of Government Industrial Hygienists I [TLV is ACGIH's copyright similar to Time Weighted Average] Recommendations VC1 included in first list 1948 TLV 500 ppm Proposed change to make TLV the ceiling value (1962) ? TLV 500c " Adopted proposed change 1963 TLV 500c " Proposed change of VC1 TLV Oct. 1970 TLV 200 ppm Adopted proposed change Oct. 1972 TLV 200 ppm OSHA Law enacted Dec. 29, 1970 (implemented Apr.28, 1971) Law adopted ACGIH standards May 29, 1971 500c ppm Priority list for standard review (VCM 11th group on priority list) Spring , 1972 Call for standard rulemaking oh VCM Jan., 1973 Meeting of Committee on VCM June , 1973 Hearing on standard Feb. 15, 1974 Emergency temporary standard April 5, 1974 50c ppm Proposed permanent standard May 6, 1974 no detectable Public comments by June 10, 1974. Hearings June25-28, 1974 Drafting of permanent standard ~ July 9, 1974 NIOSH Recommendations to OSHA % March 'll, 1974 t no detectable /BMGZ:ksc cc: H. Waltemate J. L. Nelson A. Vittone, Jr. 20194003 BFG02239