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Aliphatic and alicyclic hydrocarbons - 1 entry found

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CIS 97-7
Department of Labor
Occupational Exposure to 1,3-Butadiene: Final Rule [USA]
This final standard (effective date: 3.2.1997) amends the Occupational Safety and Health Administration (OSHA) occupational standard that regulates worker exposure to 1,3-butadiene (BD). The basis for this action is the finding that OSHA's current 8h time-weighted average (TWA) permissible exposure limit (PEL) of 1000ppm does not adequately protect workers' health. The new limits are 1ppm (8h-TWA) and 5ppm as a 15min short-term exposure limit (STEL). An "action level" of 0.5ppm as an 8h-TWA is included in the standard as a mechanism in some circumstances for exempting the employer from some administrative requirements. In order to protect workers exposed to BD, the new standard requires the implementation of engineering controls, correct work practices and the wearing of personal protective equipment, exposure monitoring, the training of potentially exposed workers, medical surveillance, hazard communication, regulated areas, emergency procedures and recordkeeping. Detailed information is provided on: carcinogenicity; reproductive effects; other studies; quantitative risk assessment; significance of risk; economic impact analysis; environmental impact. In appendix: substance data sheet; technical guidelines; medical screening and surveillance; sampling and analytical methods; respirator fit testing procedures; medical questionnaires aimed at exposed workers.
Federal Register, 4 Nov. 1996, Vol.61, No.214, Part II, p.56746-56856. [in English]