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' VAPOR EXTRACTION SYSTEM OPERATION <br /> • 7-ELEVEN STORE <br />' 9110 THORNTON AVE <br /> STOCKTON,CA <br />' TABLE 1. <br /> RW-1 <br />' OVA Concentrations TPH ai Gas Benzene Toluege E Begzene Xytenis Flow Vacuum <br /> Date (ppm as Methane) (mg/M ) (mg/M ) (mg/M ) (mg/M ) (mg/M ) (SCFM) (in H20) <br /> 1-05 2,400 220 ND 9 0 ND 1.5 -- -- <br /> 1-08 3,200 3,100 NA 70 48 <br /> 1-10 1,800 2,700 NA -- 53 <br /> 1-12 520 2,400 NA -- -- <br /> 1-16 * NA -- -- <br /> 1-19 680 NA 40 <br /> 1-30 620 NA <br /> 2-05 440 NA -- -- <br /> 2-26 260 NA -- -- <br /> 3-07 240 NA 65 48 <br /> 3-14 160 NA 70 46 <br /> 3-21 110 330 NA -- -- <br /> 3-27 130 NA -- 43 <br />' 4-04a 73 260 NA __ <br /> 4-12 110 NA <br /> 4-24a 70 NA 50 <br /> 5-01 72 NA -- -- <br /> 5-09 81 NA -- 50 <br />' 5-16 80 NA <br /> 6-11 21 NA -- <br /> 6-19 38 NA <br /> 6-29 32 NA -- -' <br /> 7-06 32 NA -- <br /> 7-25 23 NA <br /> 8-08 14 NA <br /> 8-14 20 NA <br /> 8-14 Nell turned off - no longer used as a Vapor Extraction Well <br /> * Groundwater pump removed from well with cap for repairs. <br /> a system off on arrivat to site (Main circuit breaker thrown) <br /> 1 <br />' VAPOR EXTRACTION TECHNOLOGY, INC <br />