Company: PCG-PB
Filing Date: 2025-02-13
Form Type: 10-K
Source: 0001004980-25-000010
Chunk: 238

Company: PG&E Corp
Filing Date: 2025-02-13
Form: 10-K
Item: Item 8
Chunk 238
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ating groundwater contamination caused by hexavalent chromium used in the past at the Utility’s natural gas compressor stations.  The Utility is also required to take measures to abate the effects of the contamination on the environment.Topock SiteThe Utility’s remediation and abatement efforts at the Topock site are subject to the regulatory authority of the DTSC and the U.S. Department of the Interior.  On April 24, 2018, the DTSC authorized the Utility to build an in-situ groundwater treatment system to convert hexavalent chromium into a non-toxic and non-soluble form of chromium.  Construction activities began in October 2018, and the initial phase of construction was completed in 2021.  Additional phases of construction will continue for several years.  It is reasonably possible that the Utility’s undiscounted future costs associated with the Topock site may increase by as much as $211 million if the extent of contamination or necessary remediation is greater than anticipated.  The costs associated with environmental remediation at the Topock site are expected to be recovered primarily through the HSMA, where 90% of the costs are recovered through rates.Hinkley SiteThe Utility’s remediation and abatement efforts at the Hinkley site are subject to the regulatory authority of the California Regional Water Quality Control Board, Lahontan Region.  In November 2015, the California Regional Water Quality Control Board, Lahontan Region adopted a clean-up and abatement order directing the Utility to contain and remediate the underground plume of hexavalent chromium and the potential environmental impacts.  The final order states that the Utility must continue and improve its remediation efforts, define the boundaries of the chromium plume, and take action to meet interim cleanup targets.  It is reasonably possible that the Utility’s undiscounted future costs associated with the Hinkley site may increase by as much as $123 million if the extent of contamination or necessary remediation is greater than anticipated.  The costs associated with environmental remediation at the Hinkley site will not be recovered through rates.Former Manufactured Gas PlantsFormer MGPs used coal and oil to produce gas for use by the Utility’s customers before natural gas became available.  The by-products and residues of this process were often disposed of at the MGPs themselves.  The Utility has a program to manage the residues left behind as a result of the manufacturing process; many of the sites in the program have been addressed.  It is reasonably possible that the Utility’s