Milan Army Ammunition Plant. Focused Feasibility Study for the Northern Industrial Area Soil

摘要

ICF Kaiser Engineers (ICF) and Environmental Resournes Management (ERM) have been contracted by the U.S. Army Environmental Center (USAEC) to perform a Focused Feasibility Study (FS) for contaminated soil within the northern industrial areas of Milan Army Ammunition Plant (MAAP), Tennessee. This work is being performed under Contract No. DAAA15-91-D-0014, Task Order 2. The purpose of the Focused FS is to develop and evaluate remedial alternatives such that an appropriate remedy can be selected for the site. The MAAP Remedial Investigation (RI) performed in 1989-1991 (USAEC, 1991a) confirmed that the O-Line Ponds area, facility drainage ditches that received industrial wastewater, and manufacturing and disposal areas have been sources of groundwater contamination. One finding of the RI Report was that sufficient information was available concerning the O-Line Ponds area to proceed with a Focused FS. The O-Line Ponds area was further divided into two operable units (OUs): OUl is the groundwater immediately downgradient of the O-Line Ponds area, and OU2 is the soil, surface water, and sediment at the O-Line Ponds area. A Proposed Plan and Record of Decision (ROD) for OUl were finalized in 1992, which called for groundwater extraction, treatment, and reinjection of the treated water upgradient of the O-Line Ponds. The design of this system was completed in 1993, and construction of the system is currently underway. For 0U2, the Proposed Plan and ROD (finalized in 1993) called for the extension of the existing multi-layered cap to cover the contaminated soil around the perimeter of the existing cap. The design of the cap extension was completed in 1994, and construction will begin in late 1994.