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Figure 9 depicts estimated vapor extraction capture zones based on a 20-foot ROI for individual <br /> wells extracting sod gas at 10 scfm The wells proposed for active vapor extraction are VW-1S <br /> and VW-1 D (nested well), VW-2S and VW-21D (nested well), VW-3 and VW-4 As shown on <br /> Figure 9, the overlapping capture zones for these 6 proposed extraction well locations extend <br /> ' beyond the estimated lateral plume limits <br /> Utilizing the expected start-up TPH-as-Gasoline vapor concentrations of approximately 40,000 <br /> Mg/M3, a thermal oxidizer (therm-ox)will provide for the most economic initial processing and <br /> atmospheric discharge of treated extracted soil gas Extracting from the 6 wells at a flow rate of <br /> ' 10 scfm/well, at the time of system start-up, the anticipated TPH-as-Gasoline mass extraction <br /> rate is estimated at 36 ppolwell or 216 ppd for the full system <br /> ' 14 <br />