PG&E Shell Pond

Shell-Pond site map


PG&E Shell Pond site map.


PG&E is working under the oversight of the California Department of Toxic Substances Control (DTSC) to remediate environmental impacts at a 73-acre former wastewater treatment pond known as Shell Pond and a roughly 22-acre solid waste management unit known as the Carbon Black area, both of which are located at 100 Trojan Road in Bay Point, California (site). The treatment pond and waste management unit were built and used by Shell Oil to manage wastes from its operations during the 1950s to the 1970s. PG&E purchased the property from Shell Oil in 1973 with the intent of expanding operations, which never occurred. PG&E is remediating the site to meet today’s environmental standards and allow for future recreational uses.


Revitalizing the Site


In December 2019, DTSC approved the site cleanup plan, called a Statement of Basis, which calls for managed natural recovery at Shell Pond. This green method uses plants, their root systems, and naturally occurring fungi and bacteria to organically break down contaminants found in the waste. PG&E will also monitor and maintain the clean soil and plants that act as a protective cover over portions of the Carbon Black Area. The company may also add additional soil cover to northern areas of the Carbon Black Area in the future where they have not previously been covered by clean soil and/or plants. This approved plan provides long-term protection of human health and the environment while limiting material placed in local landfills and overall impacts to the community.


PG&E is securing the necessary permits for site cleanup and anticipates conducting some pre-cleanup field work this summer. This work would include letting the water in a 20-acre segment of the pond evaporate and installing sand-filled dams and irrigation systems to support implementation of the cleanup. Cleanup activities will begin this fall and last about eight years. This includes planting across the entire 73-acre pond and monitoring plant health and the rate at which contaminants in the waste are being broken down.


Worker inspecting plant growth


In 2017, PG&E completed a study that confirmed plants and the fungi and bacteria associated with their root systems can naturally break down contamination at the site.


Community engagement


PG&E annually sponsors and volunteers at Bay Point's Unity in Community event


PG&E annually sponsors and volunteers at Bay Point’s Unity in Community event.


PG&E is actively involved in the Bay Point community and regularly provides project updates to key community groups and stakeholders. Our community work also includes participating in the Adopt-a-Road program along Port Chicago Highway and sponsoring an annual wetlands education event for middle school students.

Site-related documents can also be found locally at:

  • Bay Point Library
    205 Pacifica Ave.
    Bay Point, CA 94565
    Phone number: 925-458-9597
  • DTSC File Room
    700 Heinz Ave.
    Berkeley, CA 94710
    Phone number: 510-540-3800 (Call to schedule an appointment.)
  • Ambrose Community Center - Reception Desk
    3105 Willow Pass Road
    Bay Point, CA 94565 Phone number: 925-458-1601