York, NE: Former Lincoln Air Force Base, Atlas “F” Missile Site 10

Formerly Used Defense Sites (FUDS) Program

Published April 7, 2015

Location and Description: The former Lincoln Air Force Base Atlas "F" Missile Site 10 is located in York County, about five miles west of York, Neb. The site was operational between 1964 and 1965. Site facilities consisted of an underground, reinforced-concrete launch silo, connecting underground launch control center, a water treatment plant, two water wells, a cooling tower, a septic tank with subsurface sand filter, a water treatment holding pond, two corrugated steel igloos, and two underground fuel tanks.

Problem and Response: Trichloroethylene (TCE) was used during operation and decommissioning of the former missile site. Previous environmental investigations at the site were performed between 1994 and 2008. These studies include a two-phased site investigation, followed by a remedial investigation/feasibility study and a supplemental remedial investigation/feasibility study.

A contract was awarded in 2004 to achieve site closure by 2014. Pre-design studies conducted by the contractor revealed the extent of the groundwater contamination was significantly greater than had been previously identified. In 2008, the contract was modified to install a soil vapor extraction soil treatment system and three groundwater intercept, treatment, and reinjection systems.

Another contract was awarded in June 2009 to operate the treatment systems. On October 21, 2010, a public meeting was held in York, Neb., to present the proposed plan for remediation of the contaminated soil and groundwater. The public comment period for the proposed plan officially closed on November 19, 2010. In December of 2014 the source area soil remediation was completed. The soil vapor extraction system was abandoned and all government and contractor equipment was removed from the landowner’s property.

Activities for 2015: Continued treatment system operation and maintenance, installation of new injection and monitoring wells along the plume to capture TCE spread, and perform vapor intrusion evaluations.

Proposed Activties for 2016: Continue treatment system operation and maintenance and long-term monitoring.