POSSIBLE DEMOLITION SITE

 

SITE DESCRIPTION

This site was apparently used during the 1940s and possibly into the early 1950s as a demolition area for ammunition items. This demolition area was allegedly located South of Plant Road K near Yard G and across the road from the pistol range.

There are no records to substantiate demolition activities or the kind of ammunition items treated at the site. The exact size of the site is also unknown, but is thought to be as big as 15 acres. Specific waste on the site is unknown. The SI sampling was completed in 1991 and no significant contamination was found.

This site appears to be larger then previously thought, and previous samples may not be representative of the site conditions.

Contaminants listed in the PA for this site included white and red phosphorus as well as explosives and metals.

Additional soil samples were collected in 2004 by MKM and documented in the Draft Final Report for the Soil Data Collection.  Elevated levels of TNT and Lead were found in multi-incremental shallow soil above background levels as determined in the OU1 Record of Decision. 

This site was previously included in OU-4, but was transferred to OU-1 as documented in the Final ESD for Addition of Environmental Protectiveness to the Remedy and Transfer of Sites from OU-4 to OU-1 dated June 2008.   

CLEANUP STRATEGY

This site is included in the PBC awarded in 2004.

The soil contaminated with explosives and/or metals at this site have been successfully completed by excavation, in accordance with the RAOs established in the final ROD to protect human health and the environment.  Any contaminated soil under the infrastructures of IAAAP, and therefore inaccessible, was left in place.  Once confirmation samples determined that all accessible contaminated soil had been removed, each excavation was backfilled with clean soil to the original grade, compacted, and then reclaimed to original conditions.  All excavated soil was transported to Trench 6 in the IDA for later treatment.  A total of 3,952 cy of contaminated soil was removed from the PDS in the Fall of 2006.

This site is considered Response Complete (RC) as of September 2007 as documented in the Remedial Action Report for OU1 Soils Phase 5, 7, and 8 Sites and Installation Wide Ecological Evaluation.

A revised draft OU3 RI/FS was submitted to EPA for review in April 2008 to address groundwater; the recommendation for groundwater is No Further Action.  

MEC and MC will be addressed under the MMRP.