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Widespread polychlorinated biphenyl (PCB) contamination was discovered in Burlington High School in 2018 – 2020 prompting the school to close and relocate into a vacant department store. PCBs were commonly used in building materials, such as paint, adhesives, caulking, and fluorescent light ballasts, in school buildings constructed between 1950 and 1979, when the manufacture and use of PCBs was banned in the United States. Stone Environmental, Inc. (Stone) has been retained by the Vermont Department of Environmental Conservation as one of six environmental consultants tasked with coordinating PCB air sampling in Vermont schools.