v>EPA
United Stales
Environmental Protection
Agency
* *
*Proposed Site
National Priorities List (NPL)
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ALAMO CONTAMINATED
GROUNDWATER
Alamo, Tennessee
Crockett County
(?) Site Location:
OSWER/OSRTI
Washington, DC 20460
March 2011
The Alamo Contaminated Ground Water site consists of a plume of contaminated ground water beneath the City of
Alamo, Tennessee. The ground water contaminant plume extends approximately from Main Street south to Park
Street; and from South Mill Street west to South Burns Street. The full extent of the ground water plume has not been
determined.
Site History:
In 1988, solvent contamination was discovered in two of the four municipal production wells which supply the city of
Alamo with drinking water. Volatile organic compounds (VOCs) detected included tetrachloroethene (PCE) and
trichloroethene (TCE) above EPA's Safe Drinking Water Act Maximum Contaminant Levels (MCLs). Subsequent
investigations conducted by both the state and EPA have discovered multiple potential sources of VOC contamination
in the area. One potential source, Volunteer Circuits, manufactured printed circuit boards for the electronics industry
from 1973-1975. Additional suspected sources of contamination include newspaper printing and dry cleaners.
1 Site Contamination/Contaminants:	
VOCs, including TCE, PCE, dichloroethene (DCE) and 1,1,1 trichloroethane (TCA) have been detected in ground
water in several monitoring wells and the city's municipal wells.
rtft Potential Impacts on Surrounding Community/Environment:	
All of the potential sources have not been identified and the size of the contaminated ground water plume is unknown.
Other private wells and county utility district wells are located within a mile of the known plume area. The
contaminated aquifer is the Memphis Sands Aquifer, which is considered a sole source aquifer for this area of
Tennessee. Unless the plume is controlled and remediated, the City of Alamo will have to continually treat the raw
water prior to distribution to the public.
^ Response Activities (to date):	
Several investigations have been conducted by EPA and the state. The City of Alamo continues to treat water from the
city wells by air stripping prior to distribution.
B Need for NPL Listing:	
The State of Tennessee referred the site to EPA because contaminated ground water has contaminated the municipal
drinking water wells of the City of Alamo, and because the extent of ground water contamination has not been fully
delineated. Other federal and state cleanup programs were evaluated, but are not viable at this time. EPA received a
letter from the state supporting listing of the site on the NPL.
[The description of the site (release) is based on information available at the time the site was evaluated with the HRS. The description may
change as additional information is gathered on the sources and extent of contamination.]
For more information about the hazardous substances identified in this narrative summary, including general information regarding the effects of exposure to
these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQs can be found on
the Internet at http://www.atsdr.ede.gov/toxfaq.html or by telephone at 1-888-42-ATSDR or 1-888-422-8737.

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