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CAMBRIA <br /> Table 3 Soil Vapor Extraction Test Radius of Influence Data,Former Shell Service Statlon/Econo Gas,880 Victor Road,Lodz,California <br /> Extraction Monitoring Rw r Pw(in WC) P(r)to WC Palm in WC Rt I Screen <br /> Well Wells (ft) (ft) gauge absolute gauge absolute absolute (ft) Exposed(ft) <br /> SVE-1 Vacuum readings at observation wells coilected at 12 44 October 7 2003 <br /> SVE I SVE2 0167 160 159 3909 05 4063 4068 186 15 <br /> SVE 1 SVE 3 0167 420 159 3909 00 4068 4068 -- 15 <br /> SVE 2 Vacuum readings at observation wells collected at 9 40 October 9 2003 <br /> SVE2 SVE-1 0167 160 134 3934 06 4062 4068 199 15 <br /> SVE2 SVE-3 0167 370 134 3934 00 4068 4068 15 <br /> 1 Based on the steady state radial pressure distribution equation from"A Practical Approach io the Design Operation and Monitoring of In Situ Soil Venting Systems <br /> PC Johnson C C Stauley M W Kemblowslri D L Hyers and 1 D Cothart,Groundwater Monitoring and Review Spntg 1990 <br /> Rm=1Rw)/1r/Rw1"1(14Prsm✓Pwy�2)4((P(ryPw)^2)!)1 <br /> Note Vacuum influence was not dctretcd ro we0s SV&1 or SVE 2 when extracting soil vapors from SVE 3 <br /> Rw=Radius of Extraction Well(feet) <br /> r=Distance of monitoring well from extiactroo well(feet) Distances based on the site map and verified in the field <br /> Pw=Absolute pressure apphed at extraction well(inches of water Column) <br /> P(r)=Absolute pressure at monitoring well(inches of water column) <br /> Paten=Absolute atmospheric pressure(406 g in WC) <br /> Ri=Radius of Influence(feet) <br /> 0955 Page loft <br />