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

• The 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), disposal of approximately 8.1 Mcy in the existing on-site CCR landfill and transporting an estimated 6.8 Mcy off-site by rail for beneficial use.

• CCR closure operations are underway including ongoing removal of CCR from the Upper and Lower Ash Ponds, placing CCR in the onsite CCR landfill, and transporting CCR off-site by rail for beneficial use.

• CCR is actively being transported by rail for beneficial use at Amrize’s cement kiln in Holly Hill, SC. CCR is also being transported to Amrize’s Skippers, VA facility in preparation for beneficiation with the Ponded Ash Beneficiation System (PABS) currently under construction.

• Upper Ash Pond – As of June 30, 2026, approximately 951,136 cy of CCR has been excavated and transported off-site for beneficial use, and 1,721,273 cy of CCR has been excavated and transported to the on-site CCR landfill for disposal.

• Lower Ash Pond – As of June 30, 2026, approximately 1,990,349 cy of CCR has been excavated and transported to the on-site CCR landfill for disposal.

Bremo Power Station

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

• Constructed an onsite water treatment system and initiated operations on May 9, 2024.

• Received solid waste permit (SWP 627) from DEQ on June 30, 2025, for constructing the new CCR landfill.

• Awarded a contract for CCR excavation and landfill construction on July 3, 2025, and initiated site work including construction of the 47-acre landfill facility.

Possum Point Power Station

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

• Constructed an onsite water treatment system and initiated operations in January 2026.

• Received VPDES permit renewal effective July 1, 2026.

• Working with DEQ to finalize SWP 628 Part B for CCR landfill construction and SWP 617 for Pond D closure. Site Plan for the CCR closure project is under review by Prince William County.

• Issued a Request for Proposals for the CCR excavation and landfill construction project in April 2026, received multiple bids, and currently negotiating contractual terms with selected bidder.

Chesapeake Energy Center

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

• Received from DEQ VPDES permit renewal effective May 1, 2026, and modified solid waste permit (SWP 440) for closure of the CCR areas on July 31, 2026.

• Final design and Request for Proposals for closure of the Bottom Ash Pond (BAP) is in process to close the BAP by the September 2027 regulatory deadline; site plan and transportation plan approvals are being coordinated with the City of Chesapeake in accordance with the City-issued Conditional Use Permit.