In accordance with Virginia Code § 10.1-1402.03(G)(1), this Biennial Progress Report documents Dominion Energy Virginia’s (Dominion Energy) progress to date closing the Coal Combustion Residuals (CCR) units subject to the 2019 legislation (SB 1355). This report documents the closure plan, closure progress to date, accounting of CCR disposal and beneficial use amounts, description of transportation planning, and a discussion of groundwater and surface water monitoring results, for each applicable CCR unit at Dominion Energy’s Chesterfield Power Station, Bremo Power Station, Possum Point Power Station, and Chesapeake Energy Center. The CCR unit closure progress to date is summarized below with details provided for each station in the following sections of this report.

Chesterfield Power Station

• Closure plan includes excavation and removal of CCR from the Upper Ash Pond (11.3 million cubic yards (Mcy)) and the Lower Ash Pond (3.6 Mcy) and disposal of approximately 9 Mcy in the existing on-site CCR landfill and transporting an estimated 6 Mcy off-site by rail for beneficial use.

• Design, permitting and procurement phases have been substantially completed. A solid waste permit (SWP) for the pond closures and associated groundwater and surface water monitoring is in process with Virginia DEQ.

• Significant infrastructure construction has been completed including the ongoing sequential build-out of the existing on-site CCR landfill, construction and operation of a water treatment system, construction and operation of a rail loading facility and associated track upgrades, and additional infrastructure improvements to support the project.

• Upper Ash Pond – As of June 30, 2022, approximately 44,700 cy of CCR has been transported to the on-site rail loading facility for off-site beneficial use and 92,700 cy of CCR has been transported to the on-site CCR landfill for disposal.

• Lower Ash Pond - To support construction of the truck wash, approximately 2,100 cy has been excavated and transported to the on-site landfill.

Bremo Power Station

• Closure plan includes excavation and removal of approximately 6.2 Mcy of CCR from the North Ash Pond and placement in a new on-site CCR landfill to be constructed adjacent to the existing North Ash Pond.

• Received Special Use Permit from Fluvanna County for new landfill.

• Design and permitting phases are in process, with a Solid Waste Permit (SWP) Part A application, VPDES permit renewal, and a Wetlands Joint Permit Application under final regulatory review.

• A contract for construction and operation of a water treatment system has been finalized and construction activities have been initiated.

• SWP Part B application is expected to be submitted by the end of 2022.

Possum Point Power Station

• Closure plan includes excavation and removal of approximately 4 Mcy of CCR from Pond D and placement in a new on-site CCR landfill to be constructed adjacent to the existing Pond D.

• Received zoning determination from Prince William County for new landfill.

• Design and permitting phases are in process, with the Solid Waste Permit (SWP) Part A application and a Wetlands Joint Permit Application to be submitted by the end of 2022. A VPDES permit renewal application is also pending before DEQ.

Chesapeake Energy Center

• Closure plan includes excavation and removal of 2.2 Mcy of CCR from the site, including the landfill, bottom ash pond, and historical pond; and off-site transportation by rail, truck, or barge for beneficial use and/or disposal.

• Preliminary design work is completed, and a Conditional Use Permit (CUP) application is being reviewed by the City of Chesapeake.

• Final design, permitting, and procurement activities will proceed accordingly after CUP issuance, which is expected in late 2022 or early 2023.