Source properties that discharge legacy PCBs or mercury to municipal stormwater conveyance systems are typically located in historically industrial land-use areas where PCBs or mercury were stored and used and often released into the environment. PCBs and mercury released from these properties may adsorb to soils and sediments that can then be mobilized by wind, vehicle tracking, stormwater runoff, and/or irrigation runoff and transported off the property and into surrounding areas, including the public right-of-way (ROW) (e.g., streets) and municipal storm drainage infrastructure. 

A source property identification and referral pilot project was conducted in each of the five CW4CB pilot investigation watersheds. Project collaborators worked with municipal staff to identify and  review current and historical property records, aerial imagery analysis, field reconnaissance, and inspection records of priority facilities and properties thought to be potential source areas. The findings of the document review were used to inform the development of a field monitoring program that tested sediments and soils within each pilot investigation watershed for PCBs and mercury. The project partners identified and referred “Source Properties” to regulatory agencies for additional investigation and pollution abatement.

Source Property Identification and Referral Pilot Project Fact Sheets:

The results of this project task are presented in Section 3 of the CW4CB Overall Project Report and Source Property Identification and Referral sites and monitoring data locations are shown on the map below.

Photos of Soil Sample Collection

Click individual photos to enlarge.

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