WPCF safe work procedure no. 2--entering and working in digesters.
D000056:Accident Prevention; D000062:Accidents, Occupational / Q000517:prevention & control*; D001237:Asphyxia / Q000517:prevention & control; D001753:Blast Injuries / Q000517:prevention & control; D004864:Equipment and Supplies; D005390:Fires / Q000517:prevention & control; D006801:Humans; D008722:Methods; D011482:Protective Devices; D014481:United States; D014876:Water Pollution / Q000517:prevention & control*