TMDL Implementation and Load Reduction Accounting through the San Francisco Bay Area Regional Municipal Stormwater Permit
Sport fish monitoring in San Francisco Bay has revealed bioaccumulation of polychlorinated biphenyls (PCBs), mercury, and other pollutants at levels thought to pose a human health risk. Local subsistence fishers and their families are of particular concern. As a result, the State of California has issued an advisory on the consumption of sport fish from the Bay and developed Total Maximum Daily Load (TMDL) water quality restoration programs targeting PCBs and mercury. The general goals of the TMDLs are to identify pollutant sources, implement actions to eliminate or control the sources, and restore water quality in the Bay. The Bay Area TMDL implementation approach differs from those typically applied in Southern California. The current San Francisco Bay Area municipal regional stormwater permit (MRP 1.0) required the Permittees to test a variety of PCBs and mercury stormwater control measures in a limited number of watersheds. The soon to be reissued permit (MRP 2.0) includes a TMDL implementation framework that is a hybrid of two approaches, requiring some specific control measure implementation (i.e., green infrastructure planning and project implementation and management of PCBs-containing materials during building demolition) as well as including numeric pollutant load reduction performance criteria (e.g., a total cumulative Bay Area-wide PCBs load reduction of 3 kg/year over the permit term). The revised permit will require demonstration of the load reductions that result from implementation of three primary PCBs control programs that Permittees anticipate implementing during the permit term. This presentation will discuss the Bay Area approach to TMDL permitting and implementation, present an overview of the PCB control programs, and highlight important aspects of the compliance assessment methodology developed in cooperation with the Regional Water Board. The presentation will include interactive methods to engage audience participation such as asking questions, neighbor chats, surveys, raising of hands, thinking exercises, and telling stories that the audience can relate to. This presentation will address the conference theme by highlighting the ongoing progress in TMDL implementation in the Bay Area and the successful integration of TMDL requirements in the MRP permitting process. This presentation is intended to be the introductory presentation to a long presentation entitled “Stormwater Control Programs to Address PCBs and Mercury.”
Jon Konnan, P.E., Managing Engineer
Jon Konnan is a registered civil engineer with more than 20 years of broad experience in water quality protection. 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.