Rynek pracy i bezpieczeństwo · 10.01.1997
Occupational Exposure to Methylene Chloride
The Occupational Safety and Health Administration (OSHA) hereby amends its existing regulations for employee exposure to methylene chloride (MC), (also known as methylene dichloride, dichloromethane or DCM). OSHA has determined, based on animal and human data, that the current permissible exposure limits (PELs) allow employee exposure to a significant risk of material impairment of health. OSHA is reducing the existing 8-hour time-weighted average (TWA) exposure from 500 parts MC per million parts (ppm) of air to 25 ppm. Also, OSHA is deleting the existing ceiling limit concentration of 1,000 ppm and is reducing the existing short-term exposure limit from 2,000 ppm (measured over five minutes in any 2 hour period) to 125 ppm, measured as a 15-minute TWA. In addition, the Agency is setting an ``action level'' of 12.5 ppm, measured as an 8-hour TWA. The final rule also contains provisions for exposure control, personal protective equipment, employee exposure monitoring, training, medical surveillance, hazard communication, regulated areas, and recordkeeping. Together, these provisions will substantially reduce significant risk to the extent feasible. This standard applies to all empl