U.S. Navy News Feed

Former MCAS Tustin - Fifth CERCLA Five-Year Review

Pentagon News — Thu, 04 Dec 2025 20:38:49 GMT

The United States Department of the Navy (Navy) is the lead agency implementing Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental cleanup activities at Former Marine Corps Air Station (MCAS) Tustin, Tustin, California. Former MCAS Tustin is located approximately 6 miles southeast of Santa Ana and 9 miles northeast of Newport Beach. This notice informs the public that the Navy is initiating a Five-Year Review (FYR) for Former MCAS Tustin in accordance with the requirements of CERCLA Section 121(c). CERCLA requires a review every five years for each remedy selected in a Record of Decision to determine whether the selected remedies remain protective of human health and the environment. The Navy is conducting a FYR of the remedies implemented at Former MCAS Tustin for Operable Units (OUs) 1A, 1B, 3, and 4B.

The Navy will issue for review a Draft Fifth FYR Report to the California Department of Toxic Substances Control and California Regional Water Quality Control Board, Santa Ana Region. The Final Fifth FYR Report will be issued by 29 October 2026.

Related Documents:
Fifth Five-Year Review Fact Sheet

Navy Requests Community Input On Environmental Cleanup At Former MCAS Tustin

Pentagon News — Tue, 16 May 2023 18:06:00 GMT

The Navy is in the process of updating the Former MCAS Tustin Community Involvement Plan, formerly known as the Community Relations Plan.

Final Explanation of Significant Differences for Final Record of Decision/Remedial Action Plan, OU–1B, Site-3-Paint Stripper Disposal Area, Site-12-Drum Storage Area No. 2

BEC — Fri, 07 Apr 2023 21:38:00 GMT

This Explanation of Significant Differences (ESD) for the Final Record of Decision/Remedial Action Plan (ROD/RAP), Operable Unit 1B (OU-1B), Former Marine Corps Air Station (MCAS) Tustin, Tustin, California (United States Department of the Navy [DON], 2004) addresses potential vapor intrusion (VI) risk as a component of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) remedy for Installation Restoration Program (IRP) Sites 12 (OU-1B North) and 3 (OU-1B South), identifies appropriate VI institutional controls (ICs), and modifies one existing groundwater IC.

Final Explanation of Significant Differences for Final Record of Decision/Remedial Action Plan, OU–1A

Elizabeth Roddy — Fri, 07 Apr 2023 21:10:00 GMT

This Explanation of Significant Differences (ESD) for the Final Record of Decision/Remedial Action Plan (ROD/RAP), Operable Unit 1A (OU-1A), Former Marine Corps Air Station (MCAS) Tustin, Tustin, California (United States Department of the Navy [DON], 2004b) addresses potential vapor intrusion (VI) and groundwater exposure risks as components of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) remedy for Installation Restoration Program (IRP) Site 13S/OU-1A and identifies appropriate institutional controls (ICs).

Former MCAS Tustin - Fourth CERCLA 5-Year Review Completed

Ms. Kyle Olewnik — Sat, 22 Jan 2022 14:59:00 GMT

The United States Department of the Navy (Navy), in coordination with state environmental regulatory agencies, has completed the Fourth Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Five-Year Review (FYR) for Operable Units (OUs) 1A, 1B, 3, and 4B at Former Marine Corps Air Station (MCAS) Tustin, Tustin, California. The Navy conducted the FYR in accordance with the requirements of CERCLA Section 121(c) to determine whether the remedies being implemented in accordance with the Final Records of Decision (RODs) continue to remain protective of human health and the environment.

Former MCAS Tustin - Fourth CERCLA 5-Year Review

Pentagon News — Mon, 17 May 2021 12:43:00 GMT

In accordance with the requirements of CERCLA, the Five-Year Review evaluates whether the