Superfund Information Systems: Site Profile

Superfund Site:

LONGHORN ARMY AMMUNITION PLANT
KARNACK, TX

Cleanup Activities

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Background

The 8,416-acre Longhorn Army Ammunition Plant (LHAAP) installation is located between State Highway 43 and Caddo Lake in Karnack, Harrison County, Texas, approximately 14 miles northeast of Marshall, Texas, and approximately 40 miles northwest of Shreveport, Louisiana. The site is in a rural area and operated from 1942 to 1997, historically manufacturing TNT, rocket motors and various pyrotechnic items.

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What Is the Current Site Status?

EPA continues to conduct five-year reviews of the site remedies.  These reviews ensure that the remedies put in place continues to protect human health and the environment.

The site is a federal facility.  The Army is the lead agency with oversight by the EPA and State of Texas.  Remediation and monitoring activities are ongoing for multiple sites within LHAAP.  In addition, a ground water treatment plant is operated and maintained for treatment of groundwater extracted from sites LHAAP-16, -18 and -24.The site is a federal facility.  The Army is the lead agency with oversight by the EPA and State of Texas.  Remediation and monitoring activities are ongoing for multiple sites within LHAAP.  In addition, a ground water treatment plant is operated and maintained for treatment of groundwater extracted from sites LHAAP-16, -18 and -24.

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