Air Force Manual 85-16 required annual and five-year inspections of the Bulk Fuels Facility. The inspections were not performed for three decades. In 1985, a waiver was issued to not perform pipeline pressure testing. In 1992, leaking was discovered at the fuels facility pump house Bldg. 1033. In 1994, two waivers were issued: one for the annual pipeline testing and another for pressure testing. In 1999, another jet fuel leak was discovered from a broken 16-inch pipe. It was later learned that the pipe had been leaking fuel undetected since 1953. The Air Force initially estimated that pipe leaked roughly between of jet fuel in that 46-year span. However, state environmental officials believe the number may be as high as , which could make the spill more than twice the size of the 1989 Exxon Valdez oil spill in Prince William Sound, Alaska. In 2007, 18 inches of fuel floated over the water table when a well was dug.