The Pacific Gas and Electric Company (PG&E) Topock Compressor Station (Station) compresses natural gas so it can be transported through pipelines to PG&E's customers in northern and central California. The Station is located in eastern San Bernardino County, about 12 miles southeast of the city of Needles, California, south of Interstate 40, and one-half mile west of the Colorado River. The Station is surrounded by land owned by PG&E, the Fort Mojave Indian Tribe, BNSF Railroad, and the federal government, including the Havasu National Wildlife Refuge managed by the U.S. Fish and Wildlife Service, and lands owned and/or managed by the U.S. Bureau of Reclamation and the Bureau of Land Management (see the Topock Project Site [Site] location map).
- Phase 1 construction of the groundwater remedy began October 2, 2018 and is anticipated to be completed in 2020.
- The Basis of Design/Final (100%) Design Report was submitted by PG&E on November 18, 2015. An errata was submitted on November 18, 2016 and an addendum to the flow and solute transport model was submitted on January 9, 2017. An addendum to the Soil Management Plan (SMP) was submitted on May 28, 2019.
- Based on the Final Design, the Department of Toxic Substances Control (DTSC)The department within the California Environmental Protection Agency in charge of the regulation of hazardous waste from generation to final disposal. DTSC oversees the investigation and cleanup of hazardous waste sites. prepared a Subsequent Groundwater Remedy Environmental Impact Report (SEIR). The April 24, 2018 certified Final SEIR evaluated potential environmental impacts resulting from design details of the selected groundwater remedy (insitu 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 modified since the approval of the conceptual Groundwater Remediation Project in the 2011 Final Groundwater Remedy EIR and the 2013 Addendum to the EIR.
- The DTSC, certified the Final SEIR on April 24, 2018, and conditionally approved the groundwater remedy design on April 24, 2018. Construction of the final groundwater remedy system began October 2, 2018.
- Soil sampling and related Soil Investigation field work was conducted between December 2015 and March 2016, January through March 2017, and the latter part of April 2017. That work fulfilled the requirements of the Topock Soil Facility Investigation/Remedial Investigation (RFI/RI) Work Plan and Data Gap Work Plans #1, #2, and #3.
- On June 20, 2017, DTSC and DOI determined that the Soil RFI/RI field work was completed, and concurred with PG&E to move forward with the risk evaluation process according to the approved Risk Assessment Work Plan and Addendum. The Final Soil Risk Assessment Report was published in October 2019 and is anticipated to be approved in March 2020.
- The Soil RFI/RI Report was prepared concurrently with the soil Risk Assessment and is anticipated to be completed in late 2020.