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HWAAP-B15
BUILDING 101-16 CATCHMENT PIT
SITE DESCRIPTION
HWAAP-B15 consists of two inactive unlined surface impoundments located near Buildings 101-16 and 101-63. Impoundment HWAAP-B15A measures  75 by 15 feet by 8 feet deep with partially eroded sidewalls. The second smaller pit (HWAAP-B15B) is located adjacent to Building 101-16. Piles of dredged soil are located on the sides of the impoundments. HWAAP-B15A was in operation from 1940 to the early 1970's and received large amounts of waste water containing TNT, RDX and possibly lead based paint waste. Visible evidence of TNT-stained soils in and surrounding the impoundments were noted during site investigations (1998-1992). Remedial Investigation work in 1994 included surface soil and hand auger sampling, and cone penetrometer soundings. Two surface soil samples, two hand auger samples and one cone penetrometer soil sample were collected and analyzed for solvents, explosives and metals. Low levels of RDX, TNT and metals (Arsenic, barium, total chromium, and lead) were detected in the soil. Three surface soil samples, three hand auger samples and five cone penetrometer soil samples were collected and analyzed for explosives and metals. Elevated concentrations of explosives (TNT, TNB, DNT), and metals (Beryllium) were detected in the soil. RA by composting was completed in 1999.
PROPOSED PLAN
A Closure Decision Document was approved by the NDEP in March 2000.
Decision Document
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