incident site / drainage systems / communication equipment / Communications protocols / flammable gas / gas/air mixtures / hydrogen sulfide gas / qualified person using air monitoring equipment / toxic hydrogen sulfide gas / underground telephone vaults / natural gas / chemical asphyxiant / petroleum/natural gas drilling / metal plate / multi-gas meter / personal protective equipment / chemical exposure / Proper personal protective equipment / hazardous gas / liquid compressed gas / chemicals / /
Organization
Social Security Administration / Commission on Behavioral and Social Sciences and Education / National Research Council / National Institute for Occupational Safety / Committee on the Health and Safety Implications / Institute of Medicine / California Department of Public Health / HYDROGEN SULFIDE U.S Department of Health and Human Services / U.S. Department of Labor / U.S. Environmental Protection Agency Washington / Public Health Service Agency for Toxic Substances and Disease Registry / Wage and Hour Division / Board on Children / Youth / and Families / Occupational Safety and Health Administration / /