What's New

Final Groundwater Design Approved

The U.S. Department of the Interior (DOI) conditionally approved the Final Groundwater Design and the Construction/Remedial Action Work Plan on April 3, 2018. Subsequent to certification of the Final SEIR, DTSC conditionally approved the Final Groundwater Design and the Construction/Remedial Action Work Plan on April 24, 2018. The conditional approvals can be viewed here. The Final Groundwater Remedy Design document can be downloaded here.

Subsequent Environmental Impact Report for Groundwater Remedy Certified

The California Department of Toxic Substances Control (DTSC) certified the Final Subsequent Environmental Impact Report (SEIR) on April 24, 2018. It can be viewed here. The Final SEIR considered and responded to comments submitted during the draft review period.

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. A CTF meeting was held on May 7, 2019 in Henderson, Nevada. The next CTF is planned for November 5, 2019.

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 August 7, 2019. The next CWG meeting is planned for November 6, 2019.

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 7, 2019 in Lake Havasu City, Arizona. The next TWG is planned for November 5, 2019.

Phase 1 Construction Project Initiation Meeting held October 2, 2018

A Phase 1 Construction initiation meeting was held on October 2, 2018, in Needles, California. Over eighty individuals participated in the initiation meeting, including representatives from DOI, DTSC, the U.S. Fish and Wildlife Service, Native American Indian Tribes (Fort Mojave Indian Tribes, Chemehuevi Tribe, Cocopah Indian Tribe, and the Colorado River Indian Tribes), and key construction contractors involved in the initial construction activities. The initiation meeting covered initial construction activities and schedules, PG&E’s health & safety expectations, DOI’s and DTSC’s expectations, and perspectives of the Tribes.

DTSC April 2018 Fact Sheet Available

The DTSC April 2018 Project Update Fact Sheet - Community Update: Pacific Gas & Electric Company (PG&E) Topock Compressor Station, Environmental Investigation Update is now available to view here.

Construction of the Final Groundwater Remedy Has Begun

Click here for the current construction activities.

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 2019.

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. 

Topock Leadership Partnership (TLP) Meeting

The Topock Leadership Partnership (TLP) meeting is an opportunity for Tribal, Stakeholder, State and Federal Government, and PG&E Company leaders to interact and learn more about construction of the Topock groundwater remedy. The TLP held a meeting on September 18-19, 2018 in Lake Havasu City, Arizona.

Difficulty Accessing Material?

If you have a disability and have difficulty accessing material on this site please contact us in writing, via email or via telephone and we will work with you to make the information available. Please indicate the nature of the accessibility need, your preferred format (Braille, large print, etc.), what material you are trying to access including where it's located on this site, and how to reach you if questions arise while fulfilling your request. You can direct your requests to:


Written Requests

The Office of Civil Rights
Department of Toxic Substances Control
P.O. Box 806
Sacramento, CA 95812-0806

Email Requests


Telephone Requests

+1 916 324-3095
+1 800 728-6942 - Toll Free