Conceptual Model to Support PCB Management and Monitoring in the Emeryville Crescent Priority Margin Unit

The 2014 update of the RMP PCB Strategy called for a multi-year effort to implement the recommendations of the PCB Synthesis Report (Davis et al. 2014) pertaining to: 

1. identifying margin units that are high priorities for management and monitoring, 

2. development of conceptual models and mass budgets for margin units downstream of watersheds where management actions will occur, and 

3. monitoring in these units as a performance measure. 

The goal of the effort is to inform the review and possible revision of the PCB TMDL and the reissuance of the Municipal Regional Permit for Stormwater (MRP), both of which are tentatively scheduled to occur in 2020. Conceptual model development for four priority margin units (PMUs) that are high priorities for management and monitoring will provide a foundation for establishing effective and efficient monitoring plans to track responses to load reductions and will also help guide planning of management actions. The Emeryville Crescent (the Crescent) is the subject of this report and the first PMU to be studied.