This Explanation of Significant Difference (ESD) identifies updates to the Record of Decision (ROD) for Parcel G at Hunters Point Naval Shipyard (HPNS), San Francisco, California, undergoing environmental restoration in accordance with a Federal Facility Agreement (FFA) between the Department of the Navy (Navy) as the lead federal agency, U.S. Environmental Protection Agency (EPA) as the lead regulatory agency, and the State of California through the California Department of Toxic Substances Control (DTSC) and San Francisco Bay Region Regional Water Quality Control Board, (SFBRWQCB), collectively referred to as the FFA Signatories. The purpose of this ESD to document and communicate significant changes to the cost for implementing the remedy for radiologically impacted structures within Parcel G, specifically decontaminating, dismantling, and demolition.

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