Will PCB’s be the new asbestos?

The EPA recently announced a new initiative in response to growing concern about the addition of PCB’s (Polychlorinated biphenyls) to caulks used in construction. The PCBs were added to caulks because they improved the flexibility of the caulks which were applied in a variety of applications such around windows, doors, expansion joints and ventilation systems. PCB’s exposure can negatively affect immune, reproductive, nervous and endocrine systems. They are potentially cancer-causing if they build up in the body over time.

PCB’s are most likely to be found in buildings constructed between 1950 and 1978. PCB’s were banned in 1978 so they are unlikely to be found in buildings constructed since that time. There is concern that many schools contain PCB’s and the EPA website specifically addresses how schools should manage suspected PCB’s in their buildings.

The EPA is undertaking new research to more fully understand what the potential risks are to building occupants and workers who may impact PCB containing building materials. Additionally, the EPA is investigating the relationship between PCB containing materials and dust and air in the building. While the EPA is treating PCB’s as a serious issue, they are also reminding us that this is not a cause for alarm.

The recommended approach to responding to PCB’s in occupied buildings is similar to other hazardous materials such as lead and asbestos: use wet methods for cleaning; use of HEPA vacuums instead of dry sweeping; keep areas clean of dust and debris; wash hands and face; clean children’s toys.

We are currently consulting on a several renovation projects in which PCB containing building components are being removed including window caulk. In addition to conducting the testing of building materials we are working closely with the EPA to bring the best and safest work practices to the projects.

The agency has created a website, with updated information on this issue. Concerned parties can also call an EPA hotline toll free at 1-888-835-5372.

JoAnn Copperud, CEO – Emeryville, CA