Industrial Hygiene Sampling Survey Report of Arco Solar, Inc., Chatsworth, California.
Worker exposures to silver (7440224), lead (7439921), trichlorotrifluoroethane (76131) (TCF), 1,1,1-trichloroethane (71556) (TCE), silica (7631869) and total dust were surveyed at Arco Solar, Incorporated (SIC-3674) in Chatsworth, California, from April 4 to 6, 1979, as part of health research on photovoltaic solar energy conversion to direct electrical current. The company employs less than 100 people, of whom approximately 65 percent are employed in the production area. Employees were given physical examination on hiring and regularly thereafter. Personal and area air samples for particulate, silica, silver, lead, TCF and TCE were collected. Sample analysis revealed concentrations of particulate dust of 0.01 to 0.74 milligrams per cubic meter; silver, 10.4 to 21.4 micrograms per cubic meter; lead, less than 1.3 micrograms per cubic meter; TCE, 6.1 to 149 parts per million (ppm); and TCF a short term peak of 1390ppm. Silver exceeded the OSHA standard of 10 micrograms per cubic meter for both samples. TCF exceeded the threshold limit volume of 1000ppm. The authors conclude that no significant health hazards were found. They recommend that elevated exposures to silver and TCF be reduced to acceptable concentrations by installing local ventilation and monitoring work practices.
NIOSH, Industry Wide Studies Branch, Division of Surveillance, Hazard Evaluations and Field Studies, Cincinnati, Ohio, 28 pages