Hunters Point Power Plant Closure and Cleanup
In 1998, PG&E submitted a plan to the California Public Utilities Commission to close the plant as soon as replacement sources of electric power were brought online to ensure reliable energy for residents and businesses. PG&E brought nine new power transmission projects online over the next eight years. Upon completion of the last of those projects in 2006, the CAISO (California Independent System Operator) and FERC (Federal Energy Regulatory Commission) granted approval and the plant was closed. Since the plant was closed, PG&E has dismantled most structures at the site and conducted environmental investigations to inform a cleanup plan. The cleanup plan was approved by the California Department of Toxic Substances Control (DTSC) on June 10, 2010. PG&E completed most of the planned soil cleanup by the end of 2011 and the rest in 2012, including the implementation of the groundwater cleanup. Groundwater monitoring will continue to confirm that the treatment was successful overtime.
Area-By-Area Update and Upcoming Activities:
Below is an area-by-area update of the work that was has been completed by the end of 2011 and a brief summary of 2012 activities.
Area A (see site map below)
In 2011, PG&E completed soil removal activities and restoration work in Area A. The area is now paved with asphalt.
Area H (see site map below)
Soil removal and restoration, which included reseeding the area with native plants and adding a protective cover of coconut matting, was completed in 2011. Additional, reseeding efforts were undertaken in 2012.
Area C/D (see site map below)
The soil removal and restoration of Area C/D was completed. In the winter of 2012, PG&E will be working in the area to close underground structures that remain from the operation of the former power plant. In 2013, tunnels associated with the former plant will be sealed and filled with concrete.
Area J (see site map below)
Soil removal and restoration have been completed in Area J and the area is now paved with asphalt. A small area adjacent to the road was inaccessible and is now being covered to prevent potential exposure. The area will be subject to a soil management plan.
Area B (see site map below)
We have completed soil removal and paving of Area B. This includes implementing groundwater remediation efforts in the southern portion of Area B, and installing a barrier wall to prevent the area from possibly being impacted by groundwater remediation that is in progress.
Area I (see site map below)
The soil removal and restoration of Area I is complete. In 2012 we excavated portions of Area I to remove petroleum in the soil that has been a source of groundwater impacts. This work involved removing soil down to the groundwater table, and treating impacted groundwater in place (groundwater in this area is not used for drinking water).
Shoreline areas (see site map below)
PG&E has begun studying these areas (located outside the former power plant fence-line) to determine what, if any, cleanup measures are needed. We plan to complete these studies in 2012 and prepare any needed cleanup plan in 2013.
Sediment area (see site map below)
PG&E has concluded several years of studying the bay sediment. DTSC has determined that there are no power plant impacts in the area and therefore, no cleanup is needed for the sediments surrounding the former power plant.