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7HH-16-'91 WED 12:87 I'011-uAX TECH'OLOGIES TEL N0438 7'� <br /> i R1 <br /> �1 <br /> r <br /> r <br /> Table Z, cont. Performance fest Data, <br /> LOCATION INFLU- EXTR PERF CAPTURE EXTR TIME <br /> ENCS RACE DEPTH RADIUS VAC <br /> ('1H2O) (cfm) (feet) (feet) ("Mg) (min) <br /> EXTRC> MW-1 --- 24.0 28-58 -- 1.5 <br /> MW-2 0 28-58 147.4 to <br /> K -0.01 28-30 6911 10 <br /> G -0.01 28-30 I00.9 10 <br /> D 0 28.30 110.0 10 <br /> EXTRC> MW-1 --- 24.0 28-58 -- 1 .5 <br /> MW-2 0 28-58 147.4 15 <br /> K -0.01 28.30 69. 1 15 <br /> G -0,02 28-30 100.9 1s <br /> D 0 28-30 110.0 15 <br /> { LOCATION - Vapor probe or monitoring well location as indicated on <br /> Figure 1 . <br /> EXTRC} - Indicates probe or well used as extraction point. <br /> INFLUENCE - Measurable change in pressure in the soil at that point <br /> during testing. <br /> EXTR RATE - Volumetric flow rate in cubic feet per minute extracted from <br /> extraction point, <br /> PERF DEPTH - Perforated range or screened interval below surface grade. <br /> CAPTURE RADIUS - Distance from extraction point. <br /> EXTR VAC - Extraction vacuum in inches of mercury. <br /> TIME - Time interval from 0 that extraction point has been tested. <br /> After the investigation was completed, the temporary vapor probes were <br /> removed. Upon removal of the probes, all locations were sealed with <br /> bentonite and Portland cement. <br /> CONCLUSIONS <br /> The results of the Soil Gas Survey indicate that concentrations of <br /> hydrocarbon as vapor are located predominantly in the vicinity of the <br /> former tank cavity (Figure 2) . Concentrations were recorded at depths <br /> greater than 28 feet below grade in this area. The results of the <br /> performance testing indicate that soil conditions at this site are <br /> suitable for remediation by vapor extraction. <br /> 10 - <br />