Cleanup areas and recent activities

Former Potrero Power Plant | Site Overview | Cleanup Areas & Recent Activities | FAQArchive


Potrero Site Map

We continue to make progress. We finished work in three of the seven project areas:

  • Hoe Down Yard (PG&E owned)
  • Switchyard and Construction Yard (PG&E owned)
  • Station A Area (Portion owned by Associate Capital, and a portion owned by PG&E)

See our area-by-area updates below

Northeast Area (Associate Capital and Port of San Francisco owned)

Active cleanup work in the area is in progress and is expected to be completed by the end of this year. . Impacts extend to a portion of Pier 70, and are primarily related to the former manufactured gas plant.

The cleanup plan that was approved by the Water Board involves three cleanup methods. Impacted soils will be removed in some areas, treated in-place with a cement mix in other areas where impacts are deeper, and finally, covered in areas with lesser impacts. Also, a durable cover will be installed or existing covers will be maintained at the Site. The durable cover may be paving, buildings or clean soil with vegetation. The cover will protect against contact with remaining residues. This cleanup approach will reduce truck traffic and other impacts to the area.

Also, a deed restriction and a risk management plan (RMP) will provide safety guides for future construction work.

After the cleanup, groundwater will be monitored to confirm the cleanup is working as planned.

Offshore Sediment Area

This area includes sediments in the San Francisco Bay near the former power plant and Pier 70.The Water Board has approved a final cleanup plan, called a Remedial Action Plan (RAP), for the Offshore Sediment Area. We are now working to complete the designs for the cleanup and to work with state and local agencies to complete the permitting.

After all the permitting is complete, active cleanup is expected to begin in 2019.

The cleanup focuses on two sections within the Offshore Area:

  • Nearshore Area (about 50-75 feet from the shoreline), and
  • Transition Area (about 100 to 150 feet into the Bay)

In the Nearshore Area, impacted sediment will be dredged and capped. In the Transition Area, sediments will be treated in-place using activated carbon; an additional area will be monitored for naturally recovery.

This fall, to prepare for active cleanup, we will be removing a number of wooden pilings along the shoreline. Approximately 40 pilings will be removed. See the PG&E Work Notice (PDF, 229 KB) for more information about the upcoming work.

Switchyard and General Construction Yard Areas (PG&E owned)

The Switchyard and General Construction Yard remain an integral part of the City’s electric service. In 2012, the Water Board issued a letter that states work is complete in this area.


Hoe Down Yard (PG&E owned)

The Hoe Down Yard is a PG&E construction and storage area. In 2012, the Water Board issued a letter that states no further work is needed in this area.

Hoe down yard

Station A Area (Associate Capital/PG&E owned)

In February 2017, the Water Board issued a letter that states no further work is needed in this area.

View of buildings in station A area

Power Block Unit 3 (Owned by Associate Capital)

This area includes the former power generation facility (which was shut down in 2011).

The Water Board has approved the soil and groundwater investigation results for the Power Block Area and PG&E is planning for the closure. A closure plan, also known as a Final Remedy, was recently made available for public review and comment.

The Draft Final Remedy describes the institutional and engineering controls that are proposed to manage environmental impacts in the area.

For more information about the Final Remedy, please see the Water Board Fact Sheet (PDF, 5.6 MB)

Image shows power plant

Tank Farm Area (Owned by Associate Capital)

This area is the location of three large above-ground fuel tanks that were used to store fuel oil and diesel fuel. The tanks were removed last year, and PG&E and the Water Board are now working together to determine what kind of cleanup, if any, is needed in the area.

View of 3 large above-ground fuel tanks

Safety and reliability projects

In addition to cleanup efforts, PG&E is doing other work in the area. This work is focused on improving the safety and reliability of service in San Francisco.

Contact information

Contact information

Environmental Remediation
Information and Response Line
By email:

Important health & safety information

Important health and safety information

There is no indication that PG&E's former MGP sites pose any health concerns to the public, based on our testing, experience, and extensive review of medical literature.