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HWAAP-B22A
BUILDING 101-44 CATCHMENT PIT
SITE DESCRIPTION
HWAAP-B22A is an inactive unlined surface impoundment pit located west of Building 101-44 and northwest of HWAAP-B22B. The pit measures 54 by 42 by 4 feet  deep. The impoundment is partially eroded and partially filled with windblown sand. A large pile of dredged soil is located on the north side of the impoundment. This impoundment operated from 1940 to the early 1970's and received large amounts of waste water containing TNT and RDX. Remedial Investigation work in 1994 included surface soil and hand auger sampling, and cone penetrometer soundings. One surface soil sample, one hand auger sample and two cone penetrometer soil samples were collected and analyzed for explosives and metals. Stained soils was observed in the impoundments and soil samples collected from 0'-5' bgs were field screened for explosives. Only low concentration of metals, and no explosives were detected in soil samples taken at greater depth. There has been no impact to the groundwater from metals or explosives at this site, no remediation of the ground water is recommended. Site reassessed in 1999 using improved sampling and analytical techniques.
PROPOSED PLAN
A Closure Decision Document was approved by the NDEP in March 2001.
Decision Document
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