It originally extended across 17,250 acres (69.8 km2) producing weapons from 1942-45 after which the Army used it as a bomb factory during the Vietnam War.
The latest wells, dug deeper into the bedrock than previously, showed RDX and TCE above desired action levels in April 2016.
[2] As of 2016[update] the University of Nebraska - Lincoln owns 8,650 acres on which it maintains an agricultural research and development center.
The Department of Defense owns a portion used by the Nebraska National Guard and Army Reserves and the remainder is private property.
The Air Force also used 34 acres of the northern bomb load line 1 as "Ballistic Missile Division Technical Area".
Individuals could have skin contact and ingestion exposures to RDX, TNT, and polychlorinated biphenyls in on-site soils".
[6] In 2004, local residents complained that "regulators were dragging their feet in getting private wells sampled and were accused of not providing accurate and timely information to the public".
[7] In spring 2016, three new clusters of monitoring wells dug deeper into the bedrock aquifer than previously were installed at the south end of the known plumes, and showed RDX and TCE above the action levels.
[11] Four groundwater treatment plants have been operating, two use air stripping, one the Advanced Oxidation Process, and the fourth uses an activated carbon filter.
[9] For OU3, the final investigation was completed in 2011 and in April 2013 the involved parties signed a "No Further Action" Record of Decision.