In this component, 360 samples were collected in soil, dust, and drop inlet sediment in industrial areas of the Bay Area and analyzed of PCBs and Hg. The objective of this component was to better understand where and at what magnitude high concentrations occur in the urbanized environment. Data was collected from the cities of Richmond, Vallejo, Berkeley, Oakland, Benicia, Pittsburg, Emeryville, Concord, San Leandro, Hayward, San Jose, Sunnyvale, San Carlos, San Bruno, South San Francisco and San Francisco, plus portions of unincorporated Contra Costa County.