Pacific Southwest, Region 9: Superfund
Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations
Camp Pendleton Marine Corps Base
EPA #: CA2170023533
County: San Diego
City: Camp Pendleton
Congressional District: 48
Other Names: Marine Corps Base Camp Pendleton
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Description and History
NPL Listing History
NPL Status: Final
Proposed Date: 07/14/89
Final Date: 11/21/89
The Camp Pendleton Marine Corps Base site covers 125,000 acres in San Diego County, California. The base provides housing, training, logistical and administrative support for the Fleet Marine Force units. Past disposal practices have contaminated the groundwater and soil. In an initial investigation, the Marine Corps found nine areas of contamination. Waste generation operations at this site include maintenance and repair of vehicles (trucks, tanks, and aircraft); landfill operations; waste disposal areas, such as scrap yards; and fire fighting drill areas. The base contains wetlands, streams, and rivers which feed into the Pacific Ocean. This land is the only remaining undeveloped area between Los Angeles and San Diego.
Contaminants and Risks
- Soil and Sludges
- Environmentally Sensitive Area
Groundwater and soils are contaminated with volatile organic compounds (VOCs), spent oils, fuels, polychlorinated biphenyls (PCBs), pesticides, metals and herbicides. Though groundwater provides drinking water to the entire installation, the current drinking water supply is within drinking water standards.
Investigation and Cleanup Activities
The site is being addressed in four long-term remedial phases focusing on cleanup of soils; landfills, surface impoundments, and groundwater; other soils and groundwater; and remaining areas.
Group A (OU#1): In 1990, the Marine Corps began an investigation to determine the nature and extent of contamination of the soil and groundwater at six subsites where data were already available. The investigations were completed in the fall of 1993, and final cleanup measures started in mid 1996. The OU#1 Record of Decision (ROD) was signed in 1995 and included institutional controls and monitoring for Site 9. The remaining sites called for no further action.
Group B (OU#2): Landfills, Surface Impoundments, and Groundwater: In 1990, the Marine Corps began an investigation of the nature and extent of contamination in the landfills, surface impoundments, and groundwater. The OU#2 ROD was completed in 1997. The surface impoundments were included as no further action sites. The groundwater sites were deferred to OU#4 and the Site 7 landfill was included as part of OU#3. The landfill is capped as part the OU#3 remedial action.
Group C (OU#3): Other Soils and Groundwater: In 1990, the Marine Corps began an investigation into the nature and extent of contamination of soils and groundwater on the base located in the Santa Margarita watershed, where data was not yet available. The investigation was completed in 1996, and the ROD was signed on February 11, 1999. The remedy selected was excavation and disposal at an on-base landfill that was designated as a Corrective Action Management Unit (CAMU). The remedial action was completed in 2002. A methane capture system for the site has been constructed. The site is covered with solar panels to generate energy for several on-base projects, including powering the methane recovery system. An Explanation of Significant Differences was completed in 2008 to cover the work .
The OU4 ROD contains Sites 1D, 1E-1, 1H, and 30. The OU is comprised of sites which required a greater level of cleanup funding than previously proposed or were uncompleted when Site 7 was pre-maturely closed. The ROD was signed in 2007 and soil removal has been completed. Site 1D encountered unexpected groundwater contamination and has been created as new Site 1121. This site is undergoing additional investigation.
The OU5 ROD contains). The ROD for Sites 1A-1, 1H, 6A (all soil sites) was signed in 2008 and soils removal has been completed. For Site 1111, the No Further Action ROD was completed in 2014, following a Non-Time Critical Removal Action for soil. For 22/23 Area Groundwater, the ROD was completed in 2014 and remedial actions are in progress. The RODs for groundwater Sites 21 and Site 33, are being developed. Site 13 has one groundwater monitoring well with low low detections of 1,2,3-TCP and that site will have further monitoring. For Site 1115, pilot studies to address fuels and VOCs are in progress.
Other Sites: Site 62 had PCB contamination which was cleaned up with a Non-Time Critical Removal Action for soil and the NFA Record of Decision was finalized in June 2015. Site 1114 has on-going performance monitoring and the Proposed Plan is in progress. At Site 1116, field work is in progress to optimize groundwater treatment. For Site 1117, the RI/FS report has been completed. At Site 1121, the Final RI is complete and the path forward is to cleanup the groundwater plume under a Removal Action.
Camp Pendleton is participating in the Installation Restoration Program, a specially funded program established by the Department of Defense (DOD) in 1978 to identify, investigate, and control the migration of hazardous contaminants at military and other DOD facilities. It is not a closing base, but a growing base. At the same time, the Marine Corps is maintaining biodiversity at the site.
Cleanup Results to Date
In 2002, the Marine Corps completed construction of a landfill cap for a 28 acre class III landfill which operated from 1946 to 1970. The Marine Corps followed EPA's presumptive remedy guidelines for landfill caps with oversight from EPA under the Federal Facility Agreement (FFA). Construction began in April 1997. The landfill was designated as a CAMU as part of the OU#3 ROD.
- Remedies that have not yet been completed, but are still in the construction phase for IR Sites: 12 Area Site 13, 33, 1115 and 22/23 Area groundwater(OU-5); and 1114, are expected to be protective upon completion and in the interim, exposure pathways that could result in unacceptable risks are being managed.
- The remedy for IR Site 7 was found to be protective of both human health and the environment. The methane levels in compliance gas monitoring probe GP-9 have been addressed by the installation of a landfill gas mitigation program.
Potentially Responsible Parties
Potentially responsible parties (PRPs) refers to companies that are potentially responsible for generating, transporting, or disposing of the hazardous waste found at the site.
Online information about the PRPs for the site available.
Documents and Reports
Public Meetings: The base maintains its community involvement program with respect to its clean-up activities, including holding public comment meetings.
Public Information Repositories
The public information repositories for the site are at the following locations:
Naval Facilities Engineering Command Southwest
1220 Pacific Highway
San Diego, CA 92132-5190
Oceanside Public Library
330 N Coast Hwy
Oceanside, CA 92054
EPA Site Manager
Mail Code SFD-6-2
75 Hawthorne Street
San Francisco, CA 94105
EPA Community Involvement Coordinator
Mail Code SFD
75 Hawthorne Street
San Francisco, CA 94105
EPA Public Information Center
Department of Toxic
5706 Corporate Avenue
Cypress, CA 90630
1220 Pacific Highway
San Diego, CA 92132
After Hours (Emergency Response)