LINE 3 AMMO LAP (ARTILLERY)
SITE DESCRIPTION
The IRP site consists of the contamination from past munitions production. Any contamination from current activities will be addressed under compliance (non-ER,A funding). The practice during the early years of production was to dispose of wastewater at the Line 800 Pink Water Lagoon. This line was upgraded to include self-contained Pinkwater Reroute Systems in July 1995 and September 1998.
Line 3 is a production line that has been in operation since 1941, except for a short time between 1945 and 1949. This line fills and assembles artillery projectiles, occupies about 150 acres and consists of 26 buildings and covered walkways. The buildings include equipment rooms, explosives magazines, and nine sump buildings for explosive waste processing. The two melt buildings appear to be the areas where the highest volumes of wastes were produced during operations.
From 1977 to 1984, metal cleaning operations were conducted at Line 3. This process consisted of several stainless steel dip tanks where ammunition casings were immersed in a sulfuric/hydrochloric acid bath, followed by a chromic acid rinse, then rinsed with water. Sludge that accumulated in the bottom of the sulfuric acid tank was removed, and treated with sodium hydroxide.
The Interim ROD requires the removal of an estimated 3500cy (550cy of metals only, 1880cy of explosives only, 840cy of metals and explosives, 110cy of SVOCs and explosives, and 120cy of RAD).
The PA/SI was completed in 1991, and an initial RI was completed in May 1996. The Interim ROD requires the removal of an estimated 3500cy of contaminated soil including 120cy of soil that the Army now believes to contain radionuclides only at background levels. Per the ROD, this soil will be taken to the Inert Disposal Area (IAAP-020) and sorted by contaminant level and type.
Note: Building 3-01 will be addressed under FUSRAP.
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 3,443 cy of contaminated soil was removed from Line 3 in the Summer 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.