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Application of Gas-Phase Partitioning Tracer Tests to Characterize Immiscible-Liquid Contamination in the Vadose Zone Beneath a Fuel Depot

^a Soil, Water and Environmental Science Department and Hydrology and Water Resources Department, University of Arizona, Tucson, AZ 85721
^b Hydrology and Water Resources Department, University of Arizona, Shantz Bldg. 38, Rm. 429, University of Arizona, Tucson, AZ 85721

View larger version (84K): [in a new window]   Fig. 1. Site map.

View larger version (19K): [in a new window]   Fig. 2. Schematic illustrating test locations.

View larger version (14K): [in a new window]   Fig. 3. Results for Tracer Test 1, conducted within the boundaries of a former fuel tank facility. Breakthrough curves for SF6 and BCF.

View larger version (18K): [in a new window]   Fig. 4. Results for Tracer Test 2, conducted approximately 200 m from the former fuel tank facility. Breakthrough curves for SF6 and BCF. Lines are used in place of data symbols to help visualize the dual-peak behavior exhibited by the data.