PG&E Shell Pond

Shell-Pond site map


PG&E Shell Pond site map.


The Shell Pond site is a 73-acre former wastewater treatment pond located on a 292-acre parcel in Bay Point, California. The treatment pond was built and used by Shell Oil to manage liquid wastewater from 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. Today, PG&E is working under the oversight of the California Department of Toxic Substances Control (DTSC) to clean up the pond and related areas.


Revitalizing former treatment pond

Worker inspecting plant growth


Last year, PG&E completed a study which confirmed there are naturally occurring processes that can break down contamination found in the waste. We continue to monitor the study area.


PG&E is preparing a draft cleanup plan for the site that proposes a remediation technology called enhanced natural recovery. This green technology uses plants, their root systems, and naturally occurring fungi and bacteria to organically break-down contaminants found in the pond and related areas. To help the break-down process, crews will regularly add nutrients and till the soil to increase air circulation. The proposed cleanup technology provides long-term protection of public health and the environment, limits material being placed in landfills and minimizes impacts in the community.


PG&E will submit a draft cleanup plan for DTSC review this fall and the public will have an opportunity to review and comment on the plan later this year. It is anticipated cleanup work will begin in 2020 and continue for at least 5 years.


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