Addressing PCBs and Mercury TMDLs in San Francisco Bay through Urban Stormwater Runoff Controls: Source Property Identification and Municipal O&M Enhancements – CW4CB Pilot Project Results
The Clean Watersheds for a Clean Bay (CW4CB) project was a collaboration among the Bay Area Stormwater Management Agencies Association (BASMAA) member agencies designed to evaluate the effectiveness of selected stormwater controls for PCBs and mercury. CW4CB was funded by a $5 million grant from the U.S. Environmental Protection Agency’s San Francisco Bay Water Quality Improvement Fund and over $2 million in matching funds from Bay Area countywide stormwater management programs. Implemented in response to the San Francisco Bay mercury and PCBs Total Maximum Daily Loads (TMDLs) and the Bay Area regional municipal stormwater permit, CW4CB pilot-tested a variety of methods to control discharges of mercury and PCBs in urban stormwater runoff to the Bay. These methods included: (1) identification of pollutant source properties and referral to regulatory agencies for abatement; (2) enhancement of municipal operation & maintenance (O&M) practices that remove sediment and associated pollutants from streets and storm drain system infrastructure; and (3) retrofit of urban runoff treatment measures into existing public infrastructure.
This presentation will provide a general overview of the CW4CB project and describe the resources produced by CW4CB (e.g., the project report, fact sheets, database, and guidance manual for implementing PCBs and mercury stormwater controls) and how they can be accessed on-line. We will also present specific results for two of the three types of control measures that were pilot-tested: (1) source property identification investigations conducted in five Bay Area watersheds and (2) four types of enhanced municipal O&M actions (i.e., street sweeping, street flush and capture, storm drain system cleaning, and pump station maintenance). The presentation will describe PCBs and mercury load reductions achieved, cost analysis, and other guidance and lessons learned that will help inform future planning and implementation of stormwater controls for these pollutants (the third type of control measure, urban runoff treatment retrofit, was addressed in a companion abstract submitted separately).
Lisa Sabin, Senior Scientist
Lisa Sabin has more than 10 years of experience developing, implementing and managing monitoring and assessment projects investigating water quality. She currently assists San Francisco Bay Area municipal agencies with pollutant control programs, stormwater management and permit compliance. Prior to joining EOA, Lisa designed and implemented a research program on atmospheric deposition and impacts on stormwater and receiving water quality at the Southern California Coastal Water Research Project (SCCWRP). Lisa has both M.S. and doctorate degrees from the University of California at Los Angeles in Environmental Health Sciences and Environmental Science and Engineering, respectively.
Jon Konnan, Managing Engineer.
Jon Konnan has more than 20 years of broad experience in water quality protection in California. His areas of expertise include stormwater runoff pollution prevention and control, implementation of Total Maximum Daily Load (TMDL) water quality restoration programs, watershed assessment and monitoring, and microbial health risk assessment. His current work focuses on assisting San Francisco Bay Area municipal agencies with all facets of stormwater permit compliance. Jon has a B.S. in Microbiology from the University of Florida and an M.S. in Civil Engineering from Stanford University.