Purpose of the Program: PCBs have been detected at elevated levels in certain sport fish in San Francisco Bay. To make the fish safer to eat and protect human health, PCBs sources to the Bay need to be identified and controlled. Urban stormwater runoff is considered a significant pathway for PCBs to enter the Bay. The Regional Water Quality Control Board (RWQCB) has therefore required that Bay Area municipalities address potential sources to urban runoff, including certain building materials (e.g., caulks, sealants, insulation) that may contain PCBs. The Municipal Regional Permit (MRP), which is issued by the RWQCB, requires Bay Area local agencies to develop a program to keep PCBs from building materials out of storm drains during building demolition.