3-EPA
United
Envirortmenta) Protection
Agency
                     OSWER/OSRTI
State, Tribal, and Site Identification Branch
                Washington, DC 20460
                             NATIONAL PRIORITIES LIST (NPL)
***Final Site***
        ATTEBURY GRAIN STORAGE FACILITY
   Site Location:
                                                                            April 2009
                                   Happy, Texas
                                   Swisher County
The Attebury Grain Storage Facility site is located in downtown Happy, Texas.  The site consists of a release of
carbon tetrachloride (CTC), 1,2-dibromethane (EDB) and 1,2-dichloroethane (1,2-DCA) to ground water.  The ground
water contamination extends off the grain storage property to several public and private wells.

,0. Site History:	
The release of CTC is attributed to the use of this substance to extinguish a fire when the grain storage facility
(elevator and bins) burned down in  1962. The Texas Commission on Environmental Quality (TCEQ) conducted a
screening site inspection in May 2007. Samples taken on the inspection indicated a plume of contamination
approximately l/2 mile wide and l/2 mile long in the Ogallala Aquifer, although the extent has not been fully
characterized. CTC was detected in several wells drilled in the Ogallala Aquifer located east and southeast of the
facility.  One municipal well was closed in 1991 because the concentration of CTC exceeded EPA's Safe Drinking
Water Act maximum contaminant level (MCL) of 5 parts per billion (ppb).

§ Site Contamination/Contaminants:	
Concentrations of CTC in wells are as high as 44.2 ppb and 1, 2-DCA as high as 6.9 ppb.  The potable water is in a
relatively shallow aquifer. In addition, EDB, 1, 2-DCA, and trichloroethene (TCE) have been documented in the source
area. Soil vapor sampling in the source area indicates the presence of elevated concentrations of CTC, indicating that CTC
is still below the site.

dfr Potential Impacts on Surrounding Community/Environment:	
CTC, EDB, and 1,2-DCA were detected in the Ogallala Aquifer, which is a drinking water source in the area.  Five
domestic wells and one municipal well contained concentrations of CTC that exceeded a health-based benchmark.  In
addition, there is the potential for the CTC to migrate in soil vapor into homes, posing a risk to nearby residents.

t^ Response Activities (to date):	
In 1991, the City of Happy closed a municipal well due to the presence of CTC above the MCL. In September 2006, TCEQ
installed a filtration system on one private well that had CTC and EDB above MCLs. The remaining private well owners
were notified by  TCEQ of the ground water contamination discovered in the wells and are currently connected to the
municipal water supply.

B Meed for NPL Listing:	
The State of Texas referred the site to EPA because of contamination of CTC in public and private water supplies  and
risks associated with CTC in soil vapor. TCEQ and EPA evaluated other cleanup programs to determine if they
could protect drinking water supplies, and no other viable options were  available. The state has sent a letter of
support for NPL listing.
[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.cdc.gov/toxfaq.html or by telephone at 1-888-42-ATSDR or 1-888-422-8737.

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