Final Explanation of Significant Differences Installation Restoration (IR) Sites 1 and 2, Long Beach Naval Station

06 June 2023

From David Darrow

This Explanation of Significant Differences (ESD) applies to the Final Record of Decision (ROD) signed in June 2000 for Installation Restoration (IR) Sites 1 and 2 (collectively, the Sites) at the former Long Beach Naval Station (LBNS) in Long Beach, California (Figure 1).

This ESD is being prepared after the selected remedy in the ROD for the Sites was successfully implemented (Navy 2000a). A change in the remedy is documented in this ESD, to include Land Use Controls (LUCs) applicable to radionuclides of concern (ROCs) Radium-226 (226Ra) and Strontium-90 (90Sr) present in discrete objects and localized soil. The LUCs will be implemented to minimize the potential for exposure to residual low-level radiological contamination based on a release criterion for lifetime excess cancer risk of 5 x10-6 described in detail in Section 3.2.

Contact

This ESD will become a part of the Administrative Record File for IR Sites 1 and 2 in accordance with NCP Sections 300.435 (c)(2)(i)(A) and 300.825 (a)(2).

The public can access this ESD by clicking here
In addition, the public can access the ESD through the BRAC PMO Website: click here

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