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TABLE 1 <br /> FIELD MONITORING DATA FOR EXTENDED PILOT VAPOR EXTRACTION TEST <br /> SHELL SERVICE STATION <br /> 4445 PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> t Date Time Monitor Influent Effluent <br /> Event (ppmv) (ppmv) <br /> 01/03/92 17.15 1 28 40 I <br /> 17.30 2 31 40 <br /> 17.45 3 29 40 <br /> 01/07/92 14.36 1 42 40 <br /> 14.54 2 38 40 <br /> 15.00 3 36 40 <br /> 01/14/92 16.04 1 5,500* 40 <br /> IE 16.09 2 _61000* 40 <br /> 16.34 3 6,500* 40 <br /> 01/21/92 17.45 1 60 40 <br /> a 18.15 2 90 40 <br /> 18.30 3 80 40 <br /> NOTES: NA Not available. <br /> Influent and effluent concentrations measured with a Foxboro OVA 128 Century Organic Vapor Analyzer. <br /> * = Measurements made when VR System drawing from VEW-1. <br /> t <br /> 1 <br /> r <br /> F Aegis Environmental,Inc- <br /> February 7,1992 <br /> i ' <br />