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Technical Assistance Report No. TA-80-25-1061, Sioux Falls Water Reclamation Department, Sioux Falls, South Dakota.
Bernstein RS; Wheeler R; Ferguson R
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, TA 80-25-1061, 1981 Jan; :1-17
Municipal employees of the Sioux Falls Wastewater Treatment Facility (SIC-4952), Sioux Falls, South Dakota requested assistance as they felt there were health hazards associated with their work. Their concerns included respiratory difficulties, heart disease, and reproductive hazards. The total workforce of the site was 45. The health difficulties were centered among the 32 workers in the sewage treatment division. Site inspection revealed that an area near a manhole between the degritter building and compressor building had a concentration of hydrogen-sulfide (7783064) which exceeded 20 parts per million (ppm). Some other areas also had hydrogen-sulfide levels which exceeded the 10ppm NIOSH evaluation criteria, but workers spent little time in these areas. A leaking seal was noted on a pump near the northwest corner of the heating building which used gases from the digester for fuel. Grit coming into the facility was not aerated and moved very slowly through the system, creating anaerobic conditions. The authors conclude that no imminent health hazard existed at this site, and that the health problems encountered by the workers were probably not caused by working at this site. The authors recommend that improvements be made in ventilation, engineering controls and work practices to assist in reducing exposure to hydrogen-sulfide fumes.
NIOSH-Author; NIOSH-Technical-Assistance-Report; TA-80-25-1061; Region-8; Hazard-Confirmed; Waste-treatment; Sewage-treatment; Sulfides; Air-quality-monitoring; Toxic-gases; Ventilation-systems; Occupational-exposure
Field Studies; Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division