Exposure limits time weighted average

The permissible exposure limit time-weighted average (PEL-TWA) is 5 ppm (OSHA 1997). ACGIH (1998) and NIOSH (1992) also recommend a TWA exposure limit of 5 ppm for occupational exposure. 

OSHA PEL-TWA (Occupational Health and Safety Administration, Permissible Exposure Limits - Time Weighted Average) (NIOSH, 2005) is defined analogous to the ACGIH-TLV-TWA, but is for exposures of no more than 10 h/day, 40 h/week. 

J " 0 PEL-TWA permissible exposure limit-time-weighted average (U.S. 

The Occupational Safety and Health Administration permissible exposure limit time-weighted averages (TWAs) for chromium compounds are for, chromi-um(0) and salts - 1.0 mg m for chromium(II) and chromium(III) - 0.5mgm . The American Conference of Governmental Industrial Hygienists threshold limit value - TWA for chromium(VI) is 0.01 mgm. The US Environmental Protection Agency maximum contaminant level in drinking water is 0.1 mgH. ... 

The permissible exposure limit (time-weighted average, TWA) for octane is 500 ppm (2335 mgm ) while the American Conference of Governmental Industrial Hygienists recommends a TWA threshold limit value of 300 ppm (1400 mg m ). National... 

The Occupational Safety and Health Administration permissible exposure limit, time-weighted average (PEL-TWA) and short-term exposure limit (STEL) for oxalic acid in air are 1 and 5 mg m respectively. The American Conference of Governmental Industrial Hygienists PEL-TWA and STEL for oxalic acid in air are also 1 and 5mgm , respectively. The National Institute for Occupational Safety and Health IDHL (immediate danger to life or health) is 500mgm . ... 

The Occupational Safety and Health Administration permissible exposure limit (time-weighted average) is 5 ppm. 

Occupational/Occupational Safety and Health Administration The Lowest Lethal Concentration (LLC) is 1000 ppm per 10 min and the permissible exposure limit/time-weighted average is 5 ppm per 8h. 

---