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HWAAP-B18
BUILDING 101-62 CATCHMENT PIT
SITE DESCRIPTION
HWAAP-B18 is an inactive unlined surface impoundment located adjacent to Building 101-62 and located northeast of Building 101-62. The impoundment measures 75 by 21 by 6 feet. The sidewalls of the pit are partially eroded. No discharge pipes were evident but a septic tank is located south of the impoundment. Piles of dredged soils are located on the sides of the impoundment. This impoundment was in operation from 1940 to the early 1970's and received large amounts of waste water containing TNT and RDX. Visible evidence of TNT stained soils were seen in the impoundment during earlier investigation but no stained soils were observed during the 1994 investigations. Remedial Investigation work in 1994 included surface soil and hand auger sampling, and cone penetrometer soundings. Two surface soil samples, two hand auger sample and nine cone penetrometer soil samples were collected and analyzed for explosives and metals. RA by composting was completed in 1999.
PROPOSED PLAN
A Closure Decision Document was approved by the NDEP in March 2001.
Decision Document
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