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24 Bases with reported TCE water contamination
(Source: Agency for Toxic Substances and Disease Registry)

Marine Corps Logistics Base Barstow

Barstow, CA
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Prior to 1977, the Nebo Main Base obtained potable water from six on-base production wells for drinking and operations. The water was used by people working and living on-base. ATSDR evaluated the human exposure to this water because these wells had the potential to be impacted by the Nebo Main Base - northern plume and the Barstow area wide groundwater contamination. The northern plume is an area of groundwater contamination caused by historical disposable practices at Warehouse 2 and surrounding buildings. This warehouse was built in 1942 and the wells were installed from 1942 to 1969. The predominant contaminant in the northern plume is tetrachloroethene. In 1997, MCLB stopped using the wells for drinking and production water because of high levels of total dissolved solids. Water was then obtained from the City of Barstow. The production wells were used after 1977 to irrigate the golf course.
The Barstow area wide groundwater contamination is a regional area of groundwater contamination identified by high total dissolved solids caused by off-base upgradient municipal and industrial-waste discharges and upgradient recharge of the aquifers by irrigation.
Prior to 1994, limited well data are available. The data that does exist includes the analysis of water quality parameters such as major cation, anions, and a few other chemicals such as phenols, trihalomethanes, and mercury. Prior to 1994, the well water was not analyzed for the type of chemicals found in the Nebo Main Base - northern plume. After 1994, the production wells were sampled once in 1994 and in 1999 for the contaminants found in the northern plume. Of the chemicals analyzed for, only trichlorobenzene was found in the 1994 samples and it was below levels of public health concern
MCLB has investigated the Nebo Main Base - northern plume since 1983 and found that the plume is limited in the upper 20 feet of the aquifer and extends to the edges of the Mojave River. Concentrations at the Mojave River are below MCLs. MCLB is currently cleaning up the groundwater.

 

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