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Polychlorinated Biphenlys (PCBs) Building Demolition Program

​Polychlorinated biphenyls (PCBs) are a contaminate that have been found at elevated levels in certain species of fish in the San Francisco Bay. When PCBs enter the ocean, aquatic organisms take them up, including species that humans might consume. According to the US Environmental Protection Agency (EPA), PCBs have been found to cause a variety of adverse health effects to animals, including humans, if ingested.  

In order to improve the health of our Bay, aquatic life, and protect human health, PCBs sources need to be identified and controlled. One common pathway for PCBs to enter the Bay is through urban stormwater runoff. PCBs sources are found in certain building materials (e.g., caulks/sealants, thermal/fiberglass insulation, adhesive/mastic, rubber window seals/gaskets) from building demolition projects, specifically from buildings that were built or redeveloped between 1950 and 1980. 

The Regional Water Quality Control Board requires that local agencies, like the County, develop a screening program to keep PCBs from building materials out of the storm drain systems during building demolition projects. The Municipal Regional Permit (MRP) requires:

  • ​Developing methods to identify applicable structures and priority materials before demolition;
  • Developing protocols to ensure that PCBs are not discharged to the storm drain during demolition of these structures; and
  • Establishing the legal authority for the protocol.​
For Applicants

  1. Download and print the PCBs Screening Assessment Form (Form).
  2. Once the Form is completed and signed, send the completed Form to
  3. CWP staff will review Form for completeness.
  4. If Form is complete, CWP staff will send a confirmation letter with an assigned PCB Identification Number (PCB ID#). 
    1. ​If Form is incomplete or contains errors, CWP staff will notify the applicant to resubmit with corrections.
  5. Once you receive your confirmation letter with PCB ID#, submit a copy of the letter to the Department of Planning and Development to file with your Demo Permit Application.​

​If you have any questions, please contact CWP staff at or (408) 918-4609.​

PCBs Screening Protocol

Starting July 1, 2019, all applicants proposing to demolish a building must complete a PCBs Screening Assessment Form. The form will help you determine:

  1. Whether the building proposed for demolition is likely to have PCBs-containing building materials.
  2. How to conduct representative sampling of priority building materials (if needed).
  3. Whether PCBs are present at a concentration equal to or greater than 50 parts per million (ppm) in building materials.

​Forms and Additional Resources  

Last updated: 6/22/2020 3:36 PM