Marine Corps Logistics Base Barstow

Environmental Restoration Program Public Website

Site Descriptions

The current Installation Restoration Program (IRP) sites at Marine Corps Logistics Base (MCLB) Barstow are managed under the Navy’s Environmental Restoration Program (ERP). The overarching goal of the Navy’s ERP is to protect human health and the environment from past hazardous waste practices and releases at Navy and Marine Corps IRP sites. The interactive map below shows which sites are being addressed under the Navy’s ERP. At MCLB Barstow, the ERP is managed by the Naval Facilities Engineering Systems Command Southwest in San Diego, California.

To organize the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) site characterization and cleanup process, MCLB Barstow was divided into seven operable units (OUs). Each OU is subdivided into IR sites identified at MCLB Barstow as CERCLA Areas of Concern (CAOCs). There are currently 54 identified CAOCs at MCLB Barstow, 33 of which are under investigation or in the process of remedial action, and 21 of which received a no further action (NFA) determination and are closed.

A link to an overview of past and current environmental investigations and cleanup activities completed at each of the CAOCs can be found by clicking the site name on the map.


Figure 1 - Nebo Main Base


Figure 2 - Yermo Annex


OU 1 addresses groundwater contamination at Yermo Annex and comprises CAOC 37. OU 2 addresses groundwater contamination at Nebo Main Base and comprises CAOC 38. OU 3 addresses shallow soil contamination at Yermo Annex and comprises CAOCs 18, 20 Stratum 1 through 3, 23 Stratum 1 through 5a, and 34. OU 4 addresses shallow soil contamination at Main Base and comprises CAOCs 2, 5, 9, and 11. OU 5 addresses shallow soil contamination at Yermo Annex and comprises CAOCs 15/17, 16, 19, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32 Stratum 1 and 2, 35, and 36. OU 6 addresses shallow soil contamination at Nebo Main Base and comprises CAOCs 1, 3, 4, 6, 7 Stratum 1 through 4, 8, 12, 13, and 14. OU 7 addresses the remaining sites not covered by OUs 1 through 6 and comprises CAOCs 9.60, 9.68, and Y-7 TA-12 at Yermo Annex; CAOCs 10, N-2 Area 1, 10.38/10.39 Units 1 through 6, 10.38/10.39 Unit 7, CAOC 7 Stratum 1 (soil vapor and groundwater), 10.12, 10.27, 10.35, 10.37, 10.3, 10.4, 10.5, 10.49, and 10.80, and groundwater site NPZ-14 at Nebo Main Base. CAOC 33 is not associated with an OU and is located at the Rifle Range. MCLB Barstow has thirteen underground storage tank sites. Six of the sites are in the Yermo Annex, and seven of the sites are in the Nebo Main Base. All underground storage tank sites are associated with CAOCs within OUs, except for one tank in the Nebo Main Base which is part of a former fuel release site.

CLICK HERE for acronym definitions and a glossary of the Navy’s ERP terms.

CLICK HERE for additional site-specific documents for each site in the Navy’s Administrative Record for MCLB Barstow.

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