LINE 3A AMMO LAP (ARTILLERY)-GROUNDWATER

 

SITE DESCRIPTION

The IRP site consists of the groundwater contamination from past munitions production. Any contamination from current activities will be addressed under compliance (non-ER,A funding). This line was upgraded to include a self-contained Pinkwater Reroute System in December 1996.

Line 3A was constructed in 1941 and began operations in 1943. The line was shut down from 1945 to 1949 then resumed operations until 1989. Line 3A encompasses 119 acres and is currently active. The line is a load, assemble and pack operation for 155mm artillery rounds. The melt building appears to be the area where the highest volumes of wastes were produced during operations.

Metal cleaning operations were conducted here. The process included several stainless steel dip tanks where ammunition casings were immersed in a sulfuric/hydrochloric acid bath, followed by a chromic acid bath and water rinsing.

Two isolated shallow plumes (RDX, low level) have been identified to date. The PA/SI was completed in 1991, and the initial RI was completed in May 1996.

Phase progress will be tracked at the PBC Site, but funding requirements will be tracked under PBC Site at Iowa.  Post PBC costs will be tracked 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: Low 

CONTAMINANTS: Explosives

MEDIA OF CONCERN: Groundwater

COMPLETED IRP PHASE: PA/SI 

CURRENT IRP PHASE: RI/FS

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