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HWAAP-B24
BUILDING 102-52 ACID PIT
SITE DESCRIPTION
HWAAP-B24 is an open pit located adjacent to Building 102-52. The pit was used from 1950 to 1980 for discharged battery electrolyte waste  fluid, battery acid spills, and wash down water from the battery shop, Building 102-52. Acid and large quantities of water flowed from this building into this pit. Stained soil is evident in and around the subject pit. Remedial investigation work in 1994 included two surface soil samples, two hand auger samples, and two cone penetrometer soil sample. Samples were collected within the pit and analyzed for explosives, metals, SVOCs, VOCs, PCBs, and TPH.
Elevated lead (620 mg/kg), RDX (150 mg/ kg), TPH (34,000 mg/kg), and PCB-1260 (36 mg/ kg) were detected. Low concentrations of SVOCs, explosives except RDX, and TPH-gasoline were also detected. Sampling results show contaminant concentrations generally decreased with depth.
PROPOSED PLAN
In 2008, soil contaminated with TPH and Aroclor-1260 was excavated to below Site-Specific Target Levels. In March 2009, the impoundment was backfilled.
A Closure Decision Document  was approved by the NDEP in October 2009.
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