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VAPOR EXTRACTION SYSTEM OPERATION <br /> 7-ELEVEN STORE <br /> 9110 THORNTON AVE. <br /> STOCKTON, CA <br /> Table 2. <br /> OVA 12$-GC VAPOR CONCENTRATIONS FR IUI CARBON ADSORPTION REACT_ ORS <br /> SYSTEM <br /> SYSTEM <br /> R-1 R-2 <br /> R-3 <br /> ..; 1.08 3,100 <br /> 1-10 <br /> >11000 44 ND ND <br /> 1-16490 750 1,8 ND <br /> 1-19* 610 470 250 6.5 <br /> 1-23 440 ND ND 35 <br /> ND 5.8 <br /> * Carbon replaced in reactors #1 and <br /> #2 <br /> All OVA 128-GC vapor concentrations are expressed in parts per milli <br /> The OVA is calibrated to 95.5 parts per million methane in zero as air. <br /> with mg/m3 of gasoline in air by comparison to SKC carbon tube 9 The calibration correlates well <br /> °n as methane. The OVA i28-GC <br /> analyses. <br /> r <br /> E <br /> 10 <br /> VAPOR EXTRACTION TECHNOLOGY, INC, <br />