A federal judge has granted an extension to groups trying to reach a financial settlement to clean up contamination at a former Air Force base in Salina.

Federal District Judge Carlos Murguia on Tuesday gave the groups until Feb. 15 to finalize the financial settlement for cleaning up the pollution at the former Schilling Air Force base. The deadline had been Tuesday.

Soil and groundwater at the base, which was closed in the mid-1960s, is contaminated with the toxic solvent TCE, or trichloroethylene.

Several Salina public entities, including the city of Salina and the Salina Airport Authority, filed a federal lawsuit in 2010, seeking a settlement to recoup the cost of cleaning up the pollution.

The parties reached a proposed deal earlier and are trying to finalize the details.