HHE Report No. HETA-80-007-1520, GSA Switchgear Shop, Washington, D.C.
NIOSH 1984 Oct:40 pages
Environmental and breathing zone samples were analyzed for polychlorinated biphenyls (PCBs) at the General Services Administration (GSA) switch gear shop (SIC-3612), Washington, DC in December, 1979 and January and May, 1980. The survey was requested by GSA to evaluate PCB and other exposures. Environmental samples were also analyzed for tetrachlorodibenzodioxins (TCDDs) and tetrachlorodibenzofurans. Fifty five current and former employees and 56 comparisons were given complete medical evaluations that included nerve conduction studies and serum and fat PCB analyses. PCB concentrations in the environmental samples ranged up to 24 micrograms per cubic meter (microg/m3). Air samples contained average background concentrations of 0.5microg/m3 that increased to 15microg/m3 while work was in progress, eventually falling to a mean of 0.8microg/m3. The OSHA standard for PCBs is 1.0microg/m3. Thirty one parts per billion 2,3,7,8-tetrachlorodibenzofuran (51207319) was found in a transformer fluid sample. No TCDDs were detected. Serum and fat PCB concentrations were higher in the exposed workers. No subjects had clinical signs of PCB poisoning. The incidence of irritative symptoms, however, was higher in the exposed group. The authors conclude that a potential health hazard due to PCB exposure exists at the shop. Recommendations include using proper protective clothing and improving work practices.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazards-Confirmed; Power-generation; Region-3; Clothing; Analytical-models; Laboratories; Quantitative-analysis; HETA-80-007-1520;
Hazard Evaluation and Technical Assistance;
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-80-007-1520, 40 pages, 30 references