OSWER/OSRTI Washington, DC 20460



## N ATIONAL 

## P RIORITIES 

## L IST 

## (NPL)

[The description of the site (release) is based on information available at the time the site was evaluated with the HRS. The d escription 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 regardi ng the effects of exposure to these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQ s can be found on

the Internet at http://www.atsdr.cdc.gov/toxfaq.html or by telephone at 1-888-42-ATSDR or 1-888-422-8737. ***Proposed Site*** March 2011


### ALAMO CONTAMINATED Alamo, Tennessee

GROUND WATER Crockett County

à Site Location:

The Alamo Contaminated Ground Water site consists of a plume of contaminat ed ground water bene ath the City of Alamo, Tennessee. The ground water c ontaminant plume extends ap proximately from Main Street south to Park Street; and from South Mill St reet west to South Burns Stre et. The full extent of the ground water plume has not been

determined.

 ́ Site History:

In 1988, solvent contamination was discovered in two of the f our 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 Sa fe Drinking Water Act Maximum Contam inant Levels (MCLs). Subsequent investigations conducted by both the state and EPA have di scovered multiple potential sources of VOC contamination in the area. One potential source, Volunteer Circuits, manuf actured printed circuit boards for the electronics industry from 1973-1975. Additional suspected sources of contamin ation include newspaper pr inting and dry cleaners.

r 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.

v Potential Impacts on Surrounding Community/Environment:
All of the potential sources have not been identified and the si ze 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 distribut ion to the public.

3 Response Activities (to date ):
Several investigations have b een conducted by EPA and the state. The City of Alamo continues to treat water from the city wells by air strippi ng prior to distribution.

} Need for NPL Listing:

The State of Tennessee referred the site to EPA because contaminated ground wa ter has contaminated the municipal drinking water wells of the City of Alamo, and because the extent of ground wa ter contamination has not been fully

delineated. Other federal and state clea nup programs were evaluated, but are not vi able at this time. EPA received a letter from the state supporting listing of the site on the NPL.