Superfund Information Systems: Site Profile

Superfund Site:

LONGHORN ARMY AMMUNITION PLANT
KARNACK, TX

Contaminant List

EPA has identified the chemical substances (i.e., hazardous substances, pollutants or contaminants) listed below as contaminants of concern (COCs) for the site. COCs are the chemical substances found at the site that EPA has determined pose an unacceptable risk to human health or the environment. These are the substances evaluated by EPA to be addressed by cleanup actions at the site.

To identify COCs, 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
  • Determines the human health or ecological effects that could result from contact with the contaminants.

The list of COCs provided below come from EPA’s remedy decisions for this site. This list may not reflect a modification to these decisions that removes a contaminant from the COC list. Also, after the decision, a COC may have been cleaned up. The COCs are displayed for the OU numbers indicated in the original decision document. OU numbers may change over time.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

The following ATSDR Profile links exit the site Exit
Contaminant Name Contaminated
Media
Area of Site Found
(Operable Unit)
More Information CAS #
1,1,1-TRICHLOROETHANE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 71-55-6
1,1,1-TRICHLOROETHANE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 71-55-6
1,1,2-TRICHLOROETHANE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 79-00-5
1,1,2-TRICHLOROETHANE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 79-00-5
1,1,2-TRICHLOROETHANE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 79-00-5
1,1,2-TRICHLOROETHANE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 79-00-5
1,1,2-TRICHLOROETHANE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 79-00-5
1,1-DICHLOROETHANE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 75-34-3
1,1-DICHLOROETHENE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L17-NO2 FLASHING AREA BG (08) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 75-35-4
1,1-DICHLOROETHENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 75-35-4
1,2-DICHLOROETHANE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Groundwater L17-NO2 FLASHING AREA BG (08) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 107-06-2
1,2-DICHLOROETHANE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 107-06-2
1,3,5-TRINITROBENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 99-35-4
2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN (TCDD) TOXICITY EQUIVALENTS (TEq) Groundwater L37-QUALITY ASSURANCE LAB BLDG (14)   E17134024
2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN (TCDD) TOXICITY EQUIVALENTS (TEq) Soil L17-NO2 FLASHING AREA BG (08)   E17134024
2,4,6-TRINITROTOLUENE Soil L17-NO2 FLASHING AREA BG (08) ATSDR Profile 118-96-7
2,4-DINITROTOLUENE Soil L17-NO2 FLASHING AREA BG (08)   121-14-2
2,6-DINITROTOLUENE Soil L17-NO2 FLASHING AREA BG (08) ATSDR Profile 606-20-2
ACETONE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 67-64-1
ACETONE Solid Waste L01-INERT BURNING GROUND (01) ATSDR Profile 67-64-1
ALUMINUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7429-90-5
ANTIMONY Groundwater L12-ACTIVE LANDFILL (04) ATSDR Profile 7440-36-0
ANTIMONY Groundwater L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile 7440-36-0
ARSENIC Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-38-2
ARSENIC Groundwater L16-OLD LANDFILL (07) ATSDR Profile 7440-38-2
ARSENIC Surface Water L16-OLD LANDFILL (07) ATSDR Profile 7440-38-2
BARIUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-39-3
BARIUM Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 7440-39-3
BARIUM Soil L01-INERT BURNING GROUND (01) ATSDR Profile 7440-39-3
BARIUM Soil L17-NO2 FLASHING AREA BG (08) ATSDR Profile 7440-39-3
BENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 71-43-2
BIS(2-ETHYLHEXYL)PHTHALATE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 117-81-7
BIS(2-ETHYLHEXYL)PHTHALATE Groundwater 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 L01-INERT BURNING GROUND (01) ATSDR Profile 117-81-7
CADMIUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-43-9
CADMIUM Groundwater L12-ACTIVE LANDFILL (04) ATSDR Profile 7440-43-9
CARBON TETRACHLORIDE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 56-23-5
CHLORIDE Groundwater L01-INERT BURNING GROUND (01)   16887-00-6
CHLOROBENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 108-90-7
CHLOROETHANE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 75-00-3
CHLOROETHENE (VINYL CHLORIDE) Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L12-ACTIVE LANDFILL (04) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L16-OLD LANDFILL (07) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L17-NO2 FLASHING AREA BG (08) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Surface Water L16-OLD LANDFILL (07) ATSDR Profile 75-01-4
CHLOROFORM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 67-66-3
CHROMIUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-47-3
CHROMIUM Groundwater L16-OLD LANDFILL (07) ATSDR Profile 7440-47-3
CHROMIUM Soil L01-INERT BURNING GROUND (01) ATSDR Profile 7440-47-3
CHROMIUM Surface Water L16-OLD LANDFILL (07) ATSDR Profile 7440-47-3
CIS-1,2-DICHLOROETHENE Groundwater L12-ACTIVE LANDFILL (04) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Groundwater L17-NO2 FLASHING AREA BG (08) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Groundwater L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 156-59-2
CIS-1,2-DICHLOROETHENE Solid Waste L01-INERT BURNING GROUND (01) ATSDR Profile 156-59-2
COBALT Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-48-4
DICHLOROMETHANE (METHYLENE CHLORIDE) Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 75-09-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Groundwater L16-OLD LANDFILL (07) ATSDR Profile 75-09-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Soil L01-INERT BURNING GROUND (01) ATSDR Profile 75-09-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Solid Waste L01-INERT BURNING GROUND (01) ATSDR Profile 75-09-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Surface Water L16-OLD LANDFILL (07) ATSDR Profile 75-09-2
ETHYLBENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 100-41-4
EXPLOSIVES Solid Waste L001-R-MMRP-SOUTH TEST AREA/BOMB (23)   E17136235
EXPLOSIVES Solid Waste L003-R-MMRP-GROUND SIGNAL TEST (24)   E17136235
HEXACHLOROBENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 118-74-1
IRON Groundwater L01-INERT BURNING GROUND (01)   7439-89-6
LEAD Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7439-92-1
LEAD Soil L01-INERT BURNING GROUND (01) ATSDR Profile 7439-92-1
MANGANESE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7439-96-5
MANGANESE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 7439-96-5
MANGANESE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 7439-96-5
MANGANESE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 7439-96-5
NICKEL Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-02-0
NICKEL Groundwater L16-OLD LANDFILL (07) ATSDR Profile 7440-02-0
NICKEL Soil L12-ACTIVE LANDFILL (04) ATSDR Profile 7440-02-0
NICKEL Surface Water L16-OLD LANDFILL (07) ATSDR Profile 7440-02-0
NITROBENZENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 98-95-3
PERCHLORATE Groundwater L04-PILOT WASTE WATER PLANT (02)   14797-73-0
PERCHLORATE Groundwater L12-ACTIVE LANDFILL (04)   14797-73-0
PERCHLORATE Groundwater L16-OLD LANDFILL (07)   14797-73-0
PERCHLORATE Groundwater L17-NO2 FLASHING AREA BG (08)   14797-73-0
PERCHLORATE Groundwater L50-FORMER WASTE DISP FACILITY (18)   14797-73-0
PERCHLORATE Groundwater L001-R-MMRP-SOUTH TEST AREA/BOMB (23)   14797-73-0
PERCHLORATE Groundwater L003-R-MMRP-GROUND SIGNAL TEST (24)   14797-73-0
PERCHLORATE Soil L04-PILOT WASTE WATER PLANT (02)   14797-73-0
PERCHLORATE Soil L12-ACTIVE LANDFILL (04)   14797-73-0
PERCHLORATE Soil L17-NO2 FLASHING AREA BG (08)   14797-73-0
PERCHLORATE Soil L50-FORMER WASTE DISP FACILITY (18)   14797-73-0
PERCHLORATE Surface Water L16-OLD LANDFILL (07)   14797-73-0
PETROLEUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 8002-05-9
SELENIUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7782-49-2
SILVER Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-22-4
STRONTIUM Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 7440-24-6
STYRENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 100-42-5
SULFATE Groundwater L01-INERT BURNING GROUND (01)   14808-79-8
TETRACHLOROETHENE Groundwater L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile 127-18-4
TETRACHLOROETHENE Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 127-18-4
TETRACHLOROETHENE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 127-18-4
TETRACHLOROETHENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 127-18-4
TETRACHLOROETHENE Solid Waste L01-INERT BURNING GROUND (01) ATSDR Profile 127-18-4
THALLIUM Groundwater L16-OLD LANDFILL (07)   7440-28-0
THALLIUM Groundwater L37-QUALITY ASSURANCE LAB BLDG (14)   7440-28-0
THALLIUM Groundwater L67-ABOVE GROUND STORAGE TANK (21)   7440-28-0
THALLIUM Soil L12-ACTIVE LANDFILL (04)   7440-28-0
THALLIUM Surface Water L16-OLD LANDFILL (07)   7440-28-0
TOLUENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 108-88-3
TRANS-1,2-DICHLOROETHENE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 156-60-5
TRICHLOROETHENE Groundwater L12-ACTIVE LANDFILL (04) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L16-OLD LANDFILL (07) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L17-NO2 FLASHING AREA BG (08) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L37-QUALITY ASSURANCE LAB BLDG (14) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L46-PLANT 2/PYROTECHNIC OPERAT (15) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L50-FORMER WASTE DISP FACILITY (18) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L58-SHOPS AREA/MAINTENANCE COMPLEX (20) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L67-ABOVE GROUND STORAGE TANK (21) ATSDR Profile 79-01-6
TRICHLOROETHENE Surface Water L16-OLD LANDFILL (07) ATSDR Profile 79-01-6
TRICHLOROETHENE Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 79-01-6
TRICHLOROETHENE Soil L01-INERT BURNING GROUND (01) ATSDR Profile 79-01-6
TRICHLOROETHENE Solid Waste L01-INERT BURNING GROUND (01) ATSDR Profile 79-01-6
UNEXPLODED ORDNANCE (UXO) Solid Waste L001-R-MMRP-SOUTH TEST AREA/BOMB (23)   E1730101
UNEXPLODED ORDNANCE (UXO) Solid Waste L003-R-MMRP-GROUND SIGNAL TEST (24)   E1730101
VANADIUM Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-62-2
XYLENE (MIXED ISOMERS) Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 1330-20-7
ZINC Groundwater L01-INERT BURNING GROUND (01) ATSDR Profile 7440-66-6

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

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

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.

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