Health Hazard Evaluation Report HETA 86-339-1741, EMCO High Voltage Company, Sutter Creek, California

摘要

Possible exposure to several chemical substances during the fabrication of power supply modules was investigated at the EMCO High Voltage Company (SIC3679), Sutter Creek, California, at the request of an employee. Environmental air samples were collected during the coating and developing process and during the epoxy potting operation. Samples were analyzed for chlorobenzene (108907) and xylenes; no overexposures were registered. No overexposure was observed to butyl-glycidyl-ether (242086) and no detectable levels of epichlorohydrin (106898), cyclohexanone (108941), 2-methoxyethanol (109864), or 2-ethoxyethanol (110805) were found. During the pot soldering operation there was a potential for exposure to the fluxing agent, 3 percent hydrochloric-acid (7647010), and the operator had complained of throat and nose irritation. The author recommends that the fabrication operator wear protective gloves during coating and developing of copper boards. Gloves and goggles should be worn when weighing out the sodium-persulfate and when removing panels from the bench top etcher. Local exhaust ventilation with a movable duct should be used during the pot soldering operation.