The Tucson International Airport Area (TAA) site encompasses sections of southwest Tucson and adjoining lands south of the city in Pima County, Arizona. The site is located in the Tucson Basin and includes industrial, commercial, residential, and undeveloped areas, as well as the Tucson International Airport, the U.S. Air Force Plant 44 (AFP44), and part of the San Xavier Indian Reservation. The Santa Cruz River borders the site to the west. Before the discovery of ground water contamination in the TAA, wells within the site boundaries provided water for over 47,000 people. The first indications of ground water contamination in TAA appeared in the early 1950s when elevated levels of chromium were detected in a municipal supply well adjacent to AFP44. In 1976, a well was closed at AFP44 by the State because of high levels of chromium. The selected remedial action for this site includes: ground water pump and treatment of Areas A and B using packed column aeration, followed by discharge of treated water.
"August 1988." EPA/ROD/R09-88/021. PB89-188767. Additional title: Superfund record of decision (EPA Region 9): Tucson International Airport area, Tucson, Arizona, (first remedial action) August 1988.