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HWAAP-B19
BUILDING 101-11 CATCHMENT PIT
SITE DESCRIPTION
HWAAP-B19 is an inactive unlined surface impoundment located northeast of Building 101-11 and measures 42 by 78 by 6 feet. The sidewalls of the pit  are partially eroded and two discharge pipes enter 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 impoundments during earlier investigations but no stained soils were observed during the 1994 investigations. Remedial Investigation work completed in 1994 included surface soil and hand auger sampling, and cone penetrometer soundings. Five surface soil samples, three hand auger samples and six cone penetrometer soil samples were collected and analyzed for explosives and metals. Lab results indicate explosive and metals were detected at low concentrations. RA by composting was completed in 1999.
PROPOSED PLAN
A Closure Decision Document was approved by the NDEP in April 2001.
Decision Document
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