Regulation respecting silica - made under the Occupational Health and Safety Act Jurisdiction Canada - Ontario Year 1987 Published in English Source Ontario Ministry of Labour, Occupational Health and Safety Division, 400 University Ave., Toronto, Ont. M7A 1T7, Canada, 1987. 56p. Index. Serial number Ontario Regulation 769/83 Descriptors [Primary] Canada, Ontario, respirable dust, silica, threshold limit values [Secondary] directive, law, medical supervision, respirators, sampling and analysis Subject category Chemical safety Abstract This regulation, amended by Ontario Regulation 23/87, and presented in booklet form includes: the regulation proper, setting the exposure limit for silica at 0.10mg/m3 (TWA) with a ceiling value of 0.20mg/m3; a code for respiratory equipment for silica; a code for measuring airborne silica; a code of medical surveillance. CIS No. 89-708 Database ID 51863