What's New

Draft Subsequent Environmental Impact Report Was Available For Public Review and Comment

The California Department of Toxic Substances Control (DTSC) invited the public to review and comment on the Draft Subsequent Environmental Impact Report (Draft SEIR) for the Pacific Gas & Electric Topock Compressor Station Final Groundwater Remediation Project. The Notice of Availability can be viewed here and the Notice of Completion can be viewed here.

The Draft SEIR evaluates potential environmental impacts resulting from design details of the selected groundwater remedy. You can view the guide to the Draft SEIR and associated documents here. DTSC was accepting comments during a 47-day public comment period on the Draft SEIR from January 12, 2017 to February 27, 2017. The comment period has ended; all comments will be considered and responded to in the Final SEIR.

Public meetings to learn more about the environmental issues addressed in the Draft SEIR were held in Needles, CA on January 31, 2017, and Golden Shores, AZ on February 1, 2017. An ad and flyer announcing the public meetings were posted.

DTSC November 2016 Fact Sheet

The DTSC November 2016 Project Update Fact Sheet - Project Update: Soil Investigation and Groundwater Remedy at Pacific Gas & Electric Company Topock Compressor Station is now available to view here.

Clearinghouse Task Force (CTF) Meeting

DTSC holds regular Clearinghouse Task Force (CTF) meetings. The CTF is a small group of representatives from State and Federal agencies, key stakeholders and Tribes formed to strategize and develop processes and tools to improve communications and enhance stakeholder understanding of Project and regulatory information. The next CTF meeting is planned for February 2018.

Technical Workgroup (TWG) Meeting

The Technical Workgroup (TWG) was established as a subgroup of the Consultative Workgroup (CWG) for technical experts to deliberate on various scientific aspects of the Project and remediation issues as needed. A TWG meeting was held on August 16, 2017 in Lake Havasu City, Arizona. The August 2017 meeting focused on the development of human health and ecological risk assessments.

Consultative Workgroup (CWG) Meeting

The Consultative Workgroup (CWG) is a specific group of key governmental agencies, stakeholders and Tribes established to facilitate participation in the Site investigation and remediation process. The CWG usually meets quarterly. A CWG meeting was held on October 18, 2017 in Lake Havasu City, Arizona. The next CWG meeting is scheduled for February 28, 2018.

DTSC is Preparing a Subsequent EIR for the Groundwater Remedy

DTSC determined that the preparation of a Subsequent Environmental Impact Report (EIR) is required to evaluate potential environmental impacts resulting from design details of the selected groundwater remedy (In situ TreatmentTreatment of contamination in place. with Freshwater FlushingMoving of fresh water through the well system to push the plume through an In-Situ Reduction Zone located along National Trails Highway.) that were added or modified since the approval of the conceptual Groundwater Remediation Project in the 2011 Final Groundwater Remedy EIR and the 2013 Addendum to the EIR. DTSC issued a Notice of Preparation announcing this decision. The public comment period began on May 5 and ended on June 4, 2015.

DTSC held public meetings on May 19 and 20, 2015, where the local agencies, public, and the Tribes were provided an opportunity to discuss the scope of the Subsequent EIR (SEIR). Their input and comments were considered in the preparation of the Draft SEIR for the groundwater remedy. DTSC anticipates the draft SEIR will be available for public review and comments in late 2017. For more information on the proposed SEIR, you can view the Notice of Preparation in the document library.

Soil Investigation Field Work Completed

DTSC approved the Soil Investigation Work Plan and the Final EIR for Soil Investigation on August 24, 2015. You can view it and the associated documents here.

Soil sampling collection activities on and adjacent to the Station property began December 2015 and continued through March 2016. Soil samples collected at various locations and depths are sent to environmental laboratories for analysis. After reviewing the initial laboratory data, DTSC and DOI determined that additional soil samples were needed to properly evaluate spatial distribution of the data. Additional work was conducted according to the data gap work plan approved on November 2016 (view it here). Field work started in January 2017 and completed in April 2017.

Final Groundwater Basis of Design Report Available

Pursuant to DTSC and DOI direction, PG&E has submitted the Final Groundwater Design document for approval. The Final Design document can be downloaded here.

Soil Risk Assessment and Soil RFI/RI Reporting have begun

Upon completion of the soil investigation field work and discussion of soil data, DTSC and DOI concurred with PG&E to begin the soil risk evaluation process on June 20, 2017. The risk assessment will assess potential human health and ecological risks based on soil sampling data. This information will assist risk management decisions on the need for soil remediation, if any. The Soil Risk Assessment Report is anticipated to be completed in 2018.

Concurrently, the preparation of the Soil RFI/RI Report (also called the RFI/RI Volume 3 Report) has also begun. The Soil RFI/RI Report will present the findings and conclusions of the soil investigation field work and the conclusions from the Risk Assessment. The Soil RFI/RI Report is anticipated to be completed in 2019.