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OCR for page 52
Abbreviations ACGIH American Conference of Governmental Industrial Hygienists AEGL acute exposure guideline level AIHA American Industrial Hygiene Association ATSDR Agency for Toxic Substances and Disease Registry BMCL05 benchmark concentration with its lower confidence limit at a 5% extra risk BZ 3-quinuclidinyl benzilate ºC degree Celsius CAC chloroacetyl chloride CEELs community emergency exposure levels COPD chronic obstructive pulmonary disease DCA dichloroacetic acid DCAC dichloroacetyl chloride DCE dichloroethylene EHS extremely hazardous substances EPA U.S. Environmental Protection Agency ERPG emergency response planning guidelines h hour HN-1, -2, -3 nitrogen mustards IARC International Agency for Research on Cancer ICt50 concentration and time of a substance causing incapacitation in 50% of an exposure population IDLH immediately dangerous to life or health IRIS Integrated Risk Information System L liter LC01 lethal concentration to 1% of the exposed population LCL lower confidence limit LC50 lethal concentration to 50% of the exposed population LCt50 concentration and time of a substance that is lethal to 50% of an exposed population LOA level of odor awareness LOAEL lowest observed adverse effect level LOEL lowest observed effect level mg/m3 milligrams/cubic meter MF modifying factor min minute MITC methyl isothiocyanate mmHg millimeters of mercury MSD material safety and data sheet 52

OCR for page 52
NAC National Advisory Committee on Acute Exposure Guideline Levels for Hazardous Substances NIOSH National Institute for Occupational Safety and Health NOAEL no observed adverse effect level NOEL no observed effect level NRC National Research Council OEL occupational exposure limit PEL permissible exposure limit POD point of departure ppb parts per billion ppm parts per million RD50 concentration of a substance that reduced the respiratory rate of test organisms by 50% REL recommended exposure limit SOP standing operating procedures STEL short-term exposure limit TLV Threshold Limit Value TRI Toxics Release Inventory TSD technical support document TWA time-weighted average μg microgram UF uncertainty factor URL uniform resource locator WEEL workplace environmental exposure limit 53