Hunters Point Power Plant Closure and Cleanup
PG&E's remediation plan for former operating portion of the Hunters Point Site was approved by the Department of Toxic Substances Control (DTSC) on June 10, 2010. Following is an overview of the plan which focuses on three issues:
- Soil impacted by the former plant operations
- Groundwater impacted by plant operations, and
- Naturally Occurring Asbestos (NOA) present in the fill material on which the site was built
More on closure and cleanup:
The majority of planned soil cleanup has been completed. Cleanup in each area is deemed complete when soil tests confirm that the remedial action goals approved by DTSC have been met. Areas where soil cleanup is complete are covered with asphalt, clean soil or natural groundcover.
Groundwater in at the site (which has never been used as drinking waters) was impacted by petroleum in two areas. Treatment of the two on-site areas was completed in 2012. This work involved pumping out the petroleum and impacted groundwater and excavating the surrounding soil. The extracted petroleum and excavated soil were transported off-site for disposal. Excavated areas were treated to break down any remaining petroleum.
Groundwater treatment is currently taking place in an off-site area (Jennings Street and the White Cap property). The treatment method being used in this area is similar to on-site groundwater treatment, except that instead of applying the treatment solution to excavations, it is injected directly into the groundwater from the surface (through treatment wells). This allows us to access the groundwater while minimizing interruptions to local businesses and Jennings Street traffic. We are steadily decreasing the size of the impacted area and anticipate the groundwater treatment efforts will be complete by the end of this year.
Over the next few years, we will continue to monitor the groundwater on and off-site to ensure the treatment was effective. As with our soil remediation efforts, successful completion of groundwater cleanup will be confirmed and approved by DTSC.
The cleanup plan for the Hunters Point site was approved by the California Department of Toxic Substances Control (DTSC) on June 10, 2010. To-date, PG&E has completed more than 95 percent of the soil cleanup and is on-track to complete groundwater cleanup work this year. Cleanup of the Shoreline Area is expected to begin in 2015.
Area-By-Area Update and Upcoming Activities:
Below is an area-by-area update of the work that was has been completed to-date and a brief summary of recent activities. CLICK HERE TO VIEW UPDATED SITE MAP (PDF, 834 KB)
Area A (see site map)
In 2011, PG&E completed soil cleanup activities and restoration work in Area A. The area is now paved with asphalt.
Area H (see site map)
In Area H, soil cleanup was complete in 2011. While the area is owned by PG&E, it was not used for power plant operations, but did require cleanup of lead particles in the soil. After cleanup and restoration was completed, the area was re-seeded with native plants and covered with a protective coconut matting. PG&E received "Wildlife-at Work" from the Wildlife Habitat Council certification for efforts associated with restoration work in the area.
Area C/D (see site map)
The soil removal and restoration of Area C/D is complete. This included closure of an underground basement structure along with five underground tunnels that were used to run cooling water to the former power plant. Recent monitoring identified a small area of groundwater within Area C/D that will need further treatment, which we plan to perform in fall 2014.
Area J (see site map)
Soil removal and restoration have been completed in most of Area J (except the border area behind the retaining walls and adjacent to Evans Avenue and Jennings Street) and the area is now paved with asphalt. The border area was inaccessible. In the summer of 2015, this area will be addressed in coordination with restoration of the adjacent streetscape.
Area B (see site map)
We have completed soil removal, paving and groundwater treatment in Area B. We also installed a barrier wall to prevent the area from possibly being impacted by groundwater in the off-site areas that are still being remediated. Monitoring of Area B is routinely conducted to confirm prior treatment has been successful, and if needed, additional treatment agent is applied to the groundwater though installed wells.
Area I (see site map)
The soil removal, restoration and groundwater treatment in Area I is complete.
In fall 2014, crews will begin closing the final segment of an inactive underground fuel oil pipeline that runs under Cargo Way. The pipeline segment is about 1,500 feet long and was used to deliver fuel oil to the former power plant (1971 through 1986). Similar to other pipeline closure projects, we will be using a concrete mix to close the pipeline segment.
The majority of activity is planned for this fall and actual closure work will take approximately three weeks (depending on weather conditions), which includes set-up and close out of the work area.
Due to the pipeline's close proximity to Cargo Way, some lane closures and traffic controls will be needed. We will be working with the Port of San Francisco and area businesses to coordinate a traffic control plan and minimize any impacts to traffic on Cargo Way. We will provide advance notice of work activities and lane closures.
Shoreline Areas (see site map)
PG&E has conducted an environmental investigation along the Shoreline Area of the Hunters Point Site to determine if cleanup work is needed. The Shoreline Area is a 5.1-acre portion of the Hunters Point Site that was not involved in power plant operations and includes areas both inside and outside the property fence line.
On June 30, 2014 DTSC approved a Remedial Investigation (RI) report, detailing the findings of our work. The report identifies impacts found in some sections of the Shoreline Area related to the former power plant or fill materials, which includes serpentine rock. Serpentine is native to the area, but is a source of naturally occurring asbestos and metals. The report concluded that the property and bay trail do not pose health concerns for current trail users and local residents.
Nevertheless, we are working to develop a cleanup plan designed to maintain safe conditions into the future, when Site improvements may lead to changes in use patterns. The cleanup will also allow for future enhancements of the trail for recreational use. The RI report is available for viewing on DTSC's Envirostor website and listed as the Area E Remedial Investigation Report: http://www.envirostor.dtsc.ca.gov/public (click on Site/Facility search, and search for the site/facility name: PG&E Hunters Point). DTSC plans to issue a fact sheet summarizing the RI findings in summer 2014.
The RI will form the basis of a draft Feasibility Study/ Remedial Action Plan (FS/RAP), explaining the cleanup options – and identifying the best one – for the Shoreline Area. The FS/RAP will include the results of additional sampling work performed in 2014 to assist in designing the cleanup and restoration measures for the area.
We will inform the Project Advisory Committee (PAC) and other project stakeholders when DTSC has determined the draft FS/RAP is complete and ready to be circulated for public comment. It will be available online at DTSC’s Envirostor website and this website. Hard copies will also be available to the public at the A. Philip Randolph Institute, San Francisco Chapter (APRI) located at 1300 Evans Avenue. In addition, DTSC will mail a fact sheet summarizing the draft FS/RAP to area residents and project stakeholders.
PG&E is committed to partnering with the community throughout this process. When the draft FS/RAP is available, we will hold a PAC meeting to discuss details of the plan and gather feedback. All PAC meetings are open to the public. In addition, DTSC will hold a separate public meeting to gather community input.