Twentynine Palms USMC
Air Ground Combat Center
The Marine Corps Air Ground Combat Center, also known as 29 Palms, is the largest United States Marine Corps base. It is located adjacent to the city of Twentynine Palms in southern San Bernardino County.
Twentynine Palms tested 5 wells and 2 were contaminated above the Lifetime Health Advisory of 70 ppt.
PFOS/PFOA was found at 440 ppt in the groundwater on the base.
Source: Addressing Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) Maureen Sullivan Deputy Assistant Secretary of Defense (Environment, Safety & Occupational Health) March 2018
https://partner-mco-archive.s3.amazonaws.com/client_files/1524589484.pdf
See below for thousands of pages documenting contamination at Twentynine Palms dating back to 1995. Many of the most sensitive records are not available without filing a lengthy and costly Freedom of Information Act Request, (FOIA).
Twentynine Palms Marine Corps Air Ground Combat Center
Twenty-Nine Palms - Source - DOD
Groundwater: High Risk
Contaminants: Benzene 2100000.0 ppb MTBE 15000000.0 ppb
Soil: High Risk
Contaminants: Lead 185.0 ppb
4 Active Sites
Sites where military cleanup actions are still ongoing. The risk level of a site refers to a relative risk assessment made by the DOD, which prioritizes the cleanup of sites that pose greatest threat to safety, human health, and the environment.
HAZARDOUS SUBSTANCES
High Risk
Contaminated: Groundwater
Site ID: UST 000010
TWENTYNINE PALMS MCAGCC
Underground Storage Tanks
Cost
$5.13M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
SEP 2019
This site is under ongoing monitoring until May 2051
CONTAMINATED AREAS
Groundwater: High Risk
Contaminants: Benzene 2100000.0 ppb MTBE 15000000.0 ppb
HAZARDOUS SUBSTANCES
High Risk
Contaminated: Soil Surface Water
Site ID: SITE 00065
TWENTYNINE PALMS MCAGCC
Contaminated Soil Piles
Cost
$1.2M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
JUL 2018
This site is under ongoing monitoring until Jul 2047
CONTAMINATED AREAS
Soil: High Risk
Contaminants: Lead 185.0 ppb
Surface Water (Fresh): Risk Not Evaluated
Surface Water (Human): Risk Not Evaluated
EXPLOSIVES & MUNITIONS
Medium Risk
Contaminated: Soil
Site ID: UXO 000001
TWENTYNINE PALMS MCAGCC
Explosive Ordnance Disposal Area
Cost
$3.01M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
SEP 2022
This site is under ongoing monitoring until Oct 2052
CONTAMINATED AREAS
Soil: Risk Not Evaluated
EXPLOSIVES & MUNITIONS
Medium Risk
Site ID: UXO 000002
TWENTYNINE PALMS MCAGCC
Small Arms Range
Cost
$1.82M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
MAR 2022
This site is under ongoing monitoring until Mar 2052
Groundwater: High Risk
Contaminants: Benzene 2100000.0 ppb MTBE 15000000.0 ppb
Soil: High Risk
Contaminants: Lead 185.0 ppb
4 Active Sites
Sites where military cleanup actions are still ongoing. The risk level of a site refers to a relative risk assessment made by the DOD, which prioritizes the cleanup of sites that pose greatest threat to safety, human health, and the environment.
HAZARDOUS SUBSTANCES
High Risk
Contaminated: Groundwater
Site ID: UST 000010
TWENTYNINE PALMS MCAGCC
Underground Storage Tanks
Cost
$5.13M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
SEP 2019
This site is under ongoing monitoring until May 2051
CONTAMINATED AREAS
Groundwater: High Risk
Contaminants: Benzene 2100000.0 ppb MTBE 15000000.0 ppb
HAZARDOUS SUBSTANCES
High Risk
Contaminated: Soil Surface Water
Site ID: SITE 00065
TWENTYNINE PALMS MCAGCC
Contaminated Soil Piles
Cost
$1.2M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
JUL 2018
This site is under ongoing monitoring until Jul 2047
CONTAMINATED AREAS
Soil: High Risk
Contaminants: Lead 185.0 ppb
Surface Water (Fresh): Risk Not Evaluated
Surface Water (Human): Risk Not Evaluated
EXPLOSIVES & MUNITIONS
Medium Risk
Contaminated: Soil
Site ID: UXO 000001
TWENTYNINE PALMS MCAGCC
Explosive Ordnance Disposal Area
Cost
$3.01M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
SEP 2022
This site is under ongoing monitoring until Oct 2052
CONTAMINATED AREAS
Soil: Risk Not Evaluated
EXPLOSIVES & MUNITIONS
Medium Risk
Site ID: UXO 000002
TWENTYNINE PALMS MCAGCC
Small Arms Range
Cost
$1.82M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
MAR 2022
This site is under ongoing monitoring until Mar 2052
DoD's Installation Restoration Program (IRP) Sites that have not Achieved Response Complete (RC) January 2018
https://www.denix.osd.mil/derp/home/documents/installation-restoration-program-report-to-congress-january-2018/
Key: DERA - Defense Environmental Restoration Account funds
BRAC - Base Realignment and Closure
Navy California TWENTYNINE PALMS MCAGCC DERA SITE 00065 TWENTYNINE PALMS MCAGCC 201807 0 2
Navy California TWENTYNINE PALMS MCAGCC DERA UST 000010 TWENTYNINE PALMS MCAGCC 202206 1,910 6
https://www.denix.osd.mil/derp/home/documents/installation-restoration-program-report-to-congress-january-2018/
Key: DERA - Defense Environmental Restoration Account funds
BRAC - Base Realignment and Closure
Navy California TWENTYNINE PALMS MCAGCC DERA SITE 00065 TWENTYNINE PALMS MCAGCC 201807 0 2
Navy California TWENTYNINE PALMS MCAGCC DERA UST 000010 TWENTYNINE PALMS MCAGCC 202206 1,910 6
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