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Y <br /> CAMBRIA <br /> Table 3. Vapor Extraction- Radius of Influence Data -Shell-branded (Independent) Service Station,420 West Kettleman Lane,Lodi, California <br /> Extraction Monitoring Rw r Pw Pw P(r) P(r) Ri <br /> Well Wells (ft) (ft) (inH2O gauge) (psia) (inH2O gauge) (psia) (ft) <br /> VE-1 MW-5 0 167 7 78 1188 055 1468 721 <br /> VE-2 0 167 14 78 1188 2 1462 1593 <br /> VE-2 MW-5 0 167 103 75 1199 065 1467 1072 <br /> VE-1 0 167 14 75 1199 17 1463 1568 <br /> Abbreviations and Notes <br /> Rw=Radius of Extraction Well(feet) <br /> r=Distance of monitoring well from extraction well <br /> Pw=Absolute pressure applied at extraction well(psta or mH2O) <br /> mH20=Inches of water column <br /> Psia=Pounds per square inch absolute <br /> P(r)=Absolute pressure at motutonng well(psis or inH2O) <br /> Ri=Radius of Influence <br /> Based on the steady-state radial pressure distribution equation from A Practical Approach to the Design Operation,and Monitoring of In Situ Soil Venting Systems, <br /> P C Johnson,C C Stanley,M W Kemblowslu,D L Byers,and J D Cothart,Groundwater Monitoring and Review,Spring 1990 <br /> Ri= [Rw]/[r/Rw]^[(1 -(Patzn/Pw)Z)/((P(r)/Pw)Z- 1)] <br /> Patin=Absolute atmospheric pressure(14 696 psia) <br /> 1346 Page 1 of 1 <br /> F <br />