Health Hazard Evaluation Report HETA 82-310-1475; Hill-Murray High School Maplewood, Minnesota [open pdf - 8MB]
"On June 22, 1962, the Minnesota Pollution Control Agency and the Minnesota Department of Health requested technical assistance from the National Institute for Occupational Safety and Health (NIOSH) in the assessment of a venting of transformer dielectric oil at the Hill-Murray High School, Maplewood, Minnesota. The oil contained 45% Aroclor 1260 (polychorinated biphenyl-PCB) and 55% chlorinated benzenes (40% trichloro-and 15% tetrachloro-) with trace additives. [...] NIOSH concludes that a potential health hazard existed during the transformer incident at the Hill Murray School in Maplewood, Minnesota. Headaches, itching, exposed skin irritation, unusual, tiredness and subclinical elevations of liver enzymes may have occurred acutely as a result of this exposure. Recommendations are made in the report to reduce the chance of exposure and adverse health effects at similar incidents."
HETA # 82-310-1475; Health Evaluation and Technical Assistance Report Number 82-310-1475
Centers for Disease Control and Prevention: https://www.cdc.gov/