Source Zone Delineation Demonstration Report - Triad Resource ...

Figure 5-38 Horizontal slices at five-foot increments through the soil architecture showingscreened Intervals of vapor extraction wells .................................................................5-54Figure 5-39 Vacuum distribution predicted at 40 to 45 feet bgs during vapor extraction fromU12-VP2 for 6 Hours at 12 scfm assuming a two-layer permeability field ..................5-58Figure 5-40a Spatial locations of simulated source areas...................................................................5-63Figure 5-40b Spatial locations of simulated source areas...................................................................5-64Figure 5-40c Spatial locations of simulated source areas...................................................................5-65Figure 5-40d Spatial locations of simulated source areas...................................................................5-66Figure 5-40e Spatial locations of simulated source areas...................................................................5-67Figure 5-41 Predicted versus measured TCE concentrations at U12-VP1 and U12-VP2 forsource area #1 ................................................................................................................5-68Figure 5-42 Predicted versus measured TCE concentrations at U12-VP1 and U12-VP2 forsource area #2 ................................................................................................................5-70Figure 5-43 Predicted versus measured TCE concentrations at U12-VP1 for source area #6..........5-71Figure 5-44 Predicted versus measured TCE concentrations at U12-VP1, U12-VP2, U12-VP3,U12-VP4, and U12-VP6 for source area #7 ..................................................................5-72Figure 5-45 TCE soil concentration (mg/kg) at 25 to 30 feet bgs after diffusion period andprior to vapor extraction operations (source area 7)......................................................5-73Figure 5-46 TCE soil concentration (mg/kg) at 25 to 30 feet bgs prior to and after Soil Vaporextraction operation at U12-VP2...................................................................................5-74Figure 5-47 TCE soil gas concentration (ppmv) prior to and following soil vapor extractionfrom U12-VP2 ...............................................................................................................5-75Figure 5-48 Predicted versus measured TCE concentrations at U12-VP1 for source area #9..........5-77Figure 5-49 Predicted versus measured TCE concentrations at vapor extraction wells for400 mg/kg TCE in source area #9 .................................................................................5-78Figure 5-50 Contours of TCE soil concentrations (mg/kg) for source area 10 using the EVSaverage layer model.......................................................................................................5-80Figure 5-51 Contours of TCE soil concentrations (mg/kg) for source area 10 using the EVSmaximum layer model ...................................................................................................5-81Figure 5-52 Predicted versus measured TCE concentrations at vapor extraction wells for EVSaverage soil concentrations in source area #10 .............................................................5-82Figure 5-53 Predicted versus measured TCE concentrations at vapor extraction wells for EVSmaximum soil concentrations in source area #10..........................................................5-83Figure 5-54Figure 7-1Permeability effects on the predicted TCE vapor-phase concentration profile.............5-85Iso-concentration surface of the 100 g/kg TCE contamination in soilconstructed using 599 Wireline soil samples from 16 borings........................................7-4Figure 7-2 TCE vapor phase and soil concentrations........................................................................7-6Figure 7-3 NAPL dilution factor as a function of TCE sample concentration .................................7-7vi