Abide performs the removal of building materials (such as caulk and paint), equipment, and impacted media such as soil containing harmful polychlorinated biphenyls (PCBs). PCBs were used in many buildings, including schools, in the 1950s through the 1970s. Caulk is a flexible material used to seal gaps to make windows, door frames, masonry and joints in buildings and other structures watertight or airtight. At one time caulk was manufactured to contain PCBs because PCBs imparted flexibility.
Caulk containing PCBs at levels > 50 ppm is not authorized for use under the PCB regulations and must be removed. Caulk containing PCBs at levels < 50 ppm may remain in place. PCBs in caulk are known to contaminate adjacent building material (e.g., masonry, wood, concrete) and soil surrounding the building. Any surrounding building material that is contaminated by > 50 ppm PCB-containing caulk, is considered PCB bulk product waste. If the caulk is still attached to the building materials both need to be properly disposed.
Many old lighting systems contain ballasts which were also manufactured with PCBs. These PCBs can get into the air if the ballast fails or ruptures. Replacement of old lighting systems with new, energy efficient systems will eliminate a potential source of PCBs.