EXPLOSIVE DISPOSAL AREA (EAST BURN PADS) - GROUNDWATER

 

Site Description

The Explosive Disposal Area (EDA) east burn pads, located in the northeast corner of IAAAP, consisted of 8 raised earthen burning pads enclosed in a fenced area of approximately 12 acres. Activities included open burning of explosives-contaminated metals, propellant explosive and pyrotechnic (PEP) contaminated materials. Each pad was bermed on three sides to restrict horizontal movement of metal projectiles. The pads were in operation from 1941 until 1982, when the Explosive Waste Incinerator was built.

The PA/SI was completed in 1991, and an initial RI was completed in May 1996. The Interim ROD required the removal of contaminated soil, and 8,270cy of soil was removed in l998 (funded as an IRA). This soil was taken to the Inert Disposal Area(IAAP-020) and sorted by contaminant level and type.

Low levels of explosives and VOCs have been found in shallow groundwater and upper bedrock (30 feet bgs).

PBC Site - Phase progress will be tracked here, but funding requirements will be tracked under Site PBC at Iowa.  Post PBC costs will be covered under Site IAAP-020.

Cleanup Strategy

This site is included in the PBC awarded in 2004.  The remedial approach for this site, as well as others outside the Brush Creek watershed, will be assessed in the FS.  At present, it is presumed that localized areas of contamination will be remediated.

Status 

RRSE RATING: Medium

CONTAMINANTS: Explosives, VOCs

MEDIA OF CONCERN: Groundwater

COMPLETED IRP PHASE: PA/SI

CURRENT IRP PHASE: RI/FS

FUTURE IRP PHASE: RD, RA(C), RA(O), LTM