Figure 1
From: Mitigation of building-related polychlorinated biphenyls in indoor air of a school
Photographs of interventions: A) unit ventilator with cover and fan motor removed; B) detail of PCB caulk in original and encapsulated form; C) curtain wall with PCB caulk directly accessible to room (left side) and located behind a convective heater that was removed (right side); (D) finished false wall constructed over encapsulated PCB caulk, transite panels, and aluminum framing.