LIST OF TABLES Table Page 2-1 Sages tracers for 1998 PITT s .................................................................... .............. 38 2-2 PCE saturations from the pre-flood PITT ..................................................... .............. 40 2-3 Sages scaled PCE concentrations from the pre-flood flow field sampling ....................... 46 2-4 MLS cosolvent hydrodynamics for the 1998 ethanol flushing test at the Sages site........ 50 2-5 PCE saturations from the post-flood PITT at Sages................................................... 53 2-6 Percent ethanol remaining in Sages source zone groundwater after flushing .................. 57 2-7 Scaled PCE concentrations from the post-flood flow field sampling............................... 60 2-8 Fractional NAPL removal from RW and MLS well tracer tests at Sages ........................ 63 2-9 Fractional flux reduction (FFR) based on scaled PCE concentrations from RW and M L S w ells .................................................................................. .............. ...................... 65 3-1 Measured ethanol concentrations in the source zone transect at Sages......................... 70 3-2 Sages source zone transect natural gradient concentration......................................... 72 3-3 Sages downgradient transect natural gradient concentrations .................................... 75 3-4 Sages post-flood source zone transect mass discharge in mmol/day................................ 77 3-5 Sages mass discharge across the downgradient MLS transect in the 6-year period following the August 1998 ethanol flushing pilot test................................................ 79