1. Concentration and trend of 1,4-dioxane in wells sampled during 2002-2017 in the vicinity of the Tucson International Airport Area Superfund Site, Arizona Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2017 Resource Type: Map Access & Availability: Loading