Development of Criteria for Standards.
Transactions of the 32nd Annual Meeting of the American Conference of Governmental Industrial Hygienists, May 10-12, 1970 1970 May:58-62
A discussion is presented on the problems encountered by the Bureau of Occupational Safety and Health in establishing threshold limit values (TLV) for the development of use and exposure standards for toxic industrial agents. In accordance with budget limitations, a priority list of industrial toxic agents was developed, using the following judgment criteria: the relative extent of the population exposed, incidence of disease or illness associated with the agent, quantity of substance produced or physical agent used, and the trend of future increases or decreases in the quantity produced and/or used. Toxic agents judged to be among the higher priorities included carbon-monoxide (630080), coal dust, cotton dust, noise, benzene (71432), carbon-tetrachloride (56235), heat stress, lead (7439921), silica (7631869), and asbestos (1332214). The development of the TLV for asbestos dust is described in detail. The resulting TLV established for asbestos was an atmospheric concentration of 6 fibers/ml for fibers greater than 5 microns in length, based on a daily time-weighted average exposure. The term "national consensus standard" is specifically defined. Additionally discussed are preparations for the establishment of carbon-monoxide exposure standards.
Legislation; Hygiene; Mining; Agriculture; Safety;
630-08-0; 71-43-2; 56-23-5; 7439-92-1; 7631-86-9; 1332-21-4;
Transactions of the 32nd Annual Meeting of the American Conference of Governmental Industrial Hygienists, May 10-12, 1970