sentences:  In 1973 Naval Air Station Argentia was closed and by 1975 the entire north side of the base was out of US hands.In 1994 Naval Operating Base Argentia, was officially decommissioned and the site was transferred to the Government of Canada.From 1994 to 2007, the Government of Canada carried out a $106 million environmental remediation program at Argentia which included the removal of many building structures, and the clean up, removal or safe containment of various hazardous materials on the land and in the water about the site.