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In 2014, the Superfund Program implemented a new information system, the Superfund Enterprise Management System (SEMS). Efforts to migrate data to SEMS and to enhance data quality control are progressing. The Program will continue to rely on the final CERCLIS data set (dated November 12, 2013, which reflects official end of Fiscal Year 2013 Program progress) for public reporting until a complete and accurate SEMS data set is available. The current estimate for refreshing the content on this page is September 30, 2014.

 
Contaminants of Concern at
LONGHORN ARMY AMMUNITION PLANT (EPA ID: TX6213820529)
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  The chemical substances (i.e., hazardous substances, pollutants, or contaminants) listed below were identified as contaminants of concern (COC) for the site. COCs are the chemical substances found at the site that the EPA has determined pose an unacceptable risk to human health or the environment. These are the substances that are addressed by cleanup actions at the site. Identifying COCs is a process where the EPA identifies people and ecological resources that could be exposed to contamination found at the site, determines the amount and type of contaminants present, and identifies the possible negative human health or ecological effects that could result from contact with the contaminants.

The contaminants of concern at this site are sorted below by contaminant name. You may also sort this list by the area of the site on which it is found, called operable units (OUs), or sort this list according to the media in which they were found (e.g. soil or ground water).

see the glossary for definitions of contaminated media and operable units (OUs) >>
 
   
    CAS # Contaminant Name Contaminated
Media
Area of Site
Found (OU)
More Information    
    71-55-6 1,1,1-TRICHLOROETHANE Ground Water SITEWIDE (00) ATSDR Profile    
    71-55-6 1,1,1-TRICHLOROETHANE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    79-00-5 1,1,2-TRICHLOROETHANE Ground Water SITEWIDE (00) ATSDR Profile    
    79-00-5 1,1,2-TRICHLOROETHANE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    79-00-5 1,1,2-TRICHLOROETHANE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    75-34-3 1,1-DICHLOROETHANE Ground Water SITEWIDE (00) ATSDR Profile    
    75-35-4 1,1-DICHLOROETHENE Ground Water L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile    
    75-35-4 1,1-DICHLOROETHENE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    75-35-4 1,1-DICHLOROETHENE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    75-35-4 1,1-DICHLOROETHENE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    75-35-4 1,1-DICHLOROETHYLENE Ground Water SITEWIDE (00) ATSDR Profile    
    107-06-2 1,2-DICHLOROETHANE Ground Water SITEWIDE (00) ATSDR Profile    
    107-06-2 1,2-DICHLOROETHANE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    107-06-2 1,2-DICHLOROETHANE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    107-06-2 1,2-DICHLOROETHANE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    99-35-4 1,3,5-TRINITROBENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    1746-01-6 2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN (TCDD) TOXICITY EQUIVALENTS (TEq) Ground Water L37-QUALITY ASSURANCE LAB BLDG (14)      
    67-64-1 ACETONE Ground Water SITEWIDE (00) ATSDR Profile    
    67-64-1 ACETONE Solid Waste SITEWIDE (00) ATSDR Profile    
    7429-90-5 ALUMINUM (FUME OR DUST) Ground Water SITEWIDE (00) ATSDR Profile    
    7440-36-0 ANTIMONY Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    7440-36-0 ANTIMONY Ground Water L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile    
    7440-38-2 ARSENIC Ground Water SITEWIDE (00) ATSDR Profile    
    7440-39-3 BARIUM Ground Water SITEWIDE (00) ATSDR Profile    
    7440-39-3 BARIUM Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    7440-39-3 BARIUM Soil SITEWIDE (00) ATSDR Profile    
    71-43-2 BENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    117-81-7 BIS(2-ETHYLHEXYL)PHTHALATE Ground Water SITEWIDE (00) ATSDR Profile    
    117-81-7 BIS(2-ETHYLHEXYL)PHTHALATE Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    117-81-7 BIS(2-ETHYLHEXYL)PHTHALATE Soil L12-ACTIVE LANDFILL (04) ATSDR Profile    
    117-81-7 BIS(2-ETHYLHEXYL)PHTHALATE Solid Waste SITEWIDE (00) ATSDR Profile    
    7440-43-9 CADMIUM Ground Water SITEWIDE (00) ATSDR Profile    
    7440-43-9 CADMIUM Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    56-23-5 CARBON TETRACHLORIDE Ground Water SITEWIDE (00) ATSDR Profile    
    68188-88-5 CHLORIDE Ground Water SITEWIDE (00)      
    108-90-7 CHLOROBENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    75-00-3 CHLOROETHANE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    67-66-3 CHLOROFORM Ground Water SITEWIDE (00) ATSDR Profile    
    7440-47-3 CHROMIUM Ground Water SITEWIDE (00) ATSDR Profile    
    7440-47-3 CHROMIUM Soil SITEWIDE (00) ATSDR Profile    
    7440-48-4 COBALT AND COMPOUNDS Ground Water SITEWIDE (00) ATSDR Profile    
    100-41-4 ETHYLBENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    118-74-1 HEXACHLOROBENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    7439-89-6 IRON Ground Water SITEWIDE (00)      
    7439-92-1 LEAD Ground Water SITEWIDE (00) ATSDR Profile    
    7439-92-1 LEAD Soil SITEWIDE (00) ATSDR Profile    
    7439-96-5 MANGANESE Ground Water SITEWIDE (00) ATSDR Profile    
    7439-96-5 MANGANESE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    75-09-2 METHYLENE CHLORIDE Ground Water SITEWIDE (00) ATSDR Profile    
    75-09-2 METHYLENE CHLORIDE Soil SITEWIDE (00) ATSDR Profile    
    75-09-2 METHYLENE CHLORIDE Solid Waste SITEWIDE (00) ATSDR Profile    
    7440-02-0 NICKEL Ground Water SITEWIDE (00) ATSDR Profile    
    7440-02-0 NICKEL Soil L12-ACTIVE LANDFILL (04) ATSDR Profile    
    98-95-3 NITROBENZENE Ground Water SITEWIDE (00) ATSDR Profile    
    TBD-00000021 OIL & GREASE Ground Water SITEWIDE (00)      
    14797-73-0 PERCHLORATE Ground Water L12-ACTIVE LANDFILL (04)      
    14797-73-0 PERCHLORATE Ground Water L50-FORMER WASTE DISP FACILITY (18)      
    14797-73-0 PERCHLORATE Soil L12-ACTIVE LANDFILL (04)      
    14797-73-0 PERCHLORATE Soil L50-FORMER WASTE DISP FACILITY (18)      
    7782-49-2 SELENIUM Ground Water SITEWIDE (00) ATSDR Profile    
    7440-22-4 SILVER Ground Water SITEWIDE (00) ATSDR Profile    
    7440-24-6 STRONTIUM Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    100-42-5 STYRENE (MONOMER) Ground Water SITEWIDE (00) ATSDR Profile    
    TBD-00000005 SULFATE Ground Water SITEWIDE (00)      
    127-18-4 TETRACHLOROETHENE Ground Water L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile    
    127-18-4 TETRACHLOROETHENE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    127-18-4 TETRACHLOROETHENE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    127-18-4 TETRACHLOROETHYLENE Ground Water SITEWIDE (00) ATSDR Profile    
    127-18-4 TETRACHLOROETHYLENE Solid Waste SITEWIDE (00) ATSDR Profile    
    7440-28-0 THALLIUM Ground Water L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile    
    7440-28-0 THALLIUM Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    7440-28-0 THALLIUM Soil L12-ACTIVE LANDFILL (04) ATSDR Profile    
    108-88-3 TOLUENE Ground Water SITEWIDE (00) ATSDR Profile    
    156-60-5 TRANS-1,2-DICHLOROETHENE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    79-01-6 TRICHLOROETHENE Ground Water L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile    
    79-01-6 TRICHLOROETHYLENE Ground Water SITEWIDE (00) ATSDR Profile    
    79-01-6 TRICHLOROETHYLENE Soil SITEWIDE (00) ATSDR Profile    
    79-01-6 TRICHLOROETHYLENE Solid Waste SITEWIDE (00) ATSDR Profile    
    7440-62-2 VANADIUM (FUME OR DUST) Ground Water SITEWIDE (00) ATSDR Profile    
    75-01-4 VINYL CHLORIDE Ground Water SITEWIDE (00) ATSDR Profile    
    75-01-4 VINYL CHLORIDE Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    75-01-4 VINYL CHLORIDE Ground Water L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile    
    75-01-4 VINYL CHLORIDE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    75-01-4 VINYL CHLORIDE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    1330-20-7 XYLENE Ground Water SITEWIDE (00) ATSDR Profile    
    7440-66-6 ZINC Ground Water SITEWIDE (00) ATSDR Profile    
    156-59-2 cis-1,2-DICHLOROETHENE Ground Water L12-ACTIVE LANDFILL (04) ATSDR Profile    
    156-59-2 cis-1,2-DICHLOROETHENE Ground Water L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile    
    156-59-2 cis-1,2-DICHLOROETHENE Ground Water L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile    
    156-59-2 cis-1,2-DICHLOROETHENE Ground Water L58-MAINTENANCE COMPLEX (20) ATSDR Profile    
    156-59-2 cis-1,2-DICHLOROETHYLENE Solid Waste SITEWIDE (00) ATSDR Profile    
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  About CAS #  
  Chemical Abstracts Service (CAS) is a division of the American Chemical Society. CAS builds and maintains the largest and most current database of chemical substance information in the world. These chemical substances are labeled with CAS Registry Numbers® (CASRNs or CAS Numbers) and are used internationally as unique numeric identifiers for a single substance. They have no chemical significance and, because they are widely used, are a link to a wealth of information about a specific chemical substance. They are provided here for reference purposes to hopefully aide you in researching the respective chemical. For more information, visit the CAS Web site. Exit EPA  
 
  About ATSDR  
  The Agency for Toxic Substances and Disease Registry (ATSDR) is an agency of the U.S. Department of Health and Human Services. ATSDR is charged under the Superfund law (CERCLA) to assess the presence and nature of health hazards at specific Superfund sites, to help prevent or reduce further exposure and the illnesses that result from such exposures, and to expand the knowledge base about health effects from exposure to hazardous substances. ATSDR maintains a series of fact sheets and profiles about contaminants of concern commonly found at Superfund sites. Links to these resources are provided above when available. For more information, visit the ATSDR Web site. Exit EPA  
 
  About EPA’s IRIS  
  The Integrated Risk Information System (IRIS), prepared and maintained by the U.S. Environmental Protection Agency (U.S. EPA), is an electronic database containing information on human health effects that may result from exposure to various chemicals in the environment. IRIS was initially developed for EPA staff in response to a growing demand for consistent information on chemical substances for use in risk assessments, decision-making and regulatory activities. The information in IRIS is intended for those without extensive training in toxicology, but with some knowledge of health sciences. For more information, visit the EPA IRIS Web site.  
 
  About EPA’s SRS  
  The Substance Registry System (SRS) is the Environmental Protection Agency's (EPA) central system for information about regulated and monitored substances. The system provides a common basis for identification of chemicals, biological organisms, and other substances listed in EPA regulations and data systems, as well as substances of interest from other sources, such as publications. The system does not provide health hazard information at this time. For more information, visit the EPA SRS Web site.  
 
 
DISCLAIMER: Be advised that the data contained in these profiles are intended solely for informational purposes use by employees of the U.S. Environmental Protection Agency for management of the Superfund program. They are not intended for use in calculating Cost Recovery Statutes of Limitations and cannot be relied upon to create any rights, substantive or procedural, enforceable by any party in litigation with the United States. EPA reserves the right to change these data at any time without public notice.


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