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Benzene and TPH-g Vapor Phase Concentratl_ons Versus Time <br /> Quik Stop#121 <br /> Manteca CA October 17 2001 <br /> 40 30,000 <br /> 35 <br /> 25,000 <br /> .� 30 <br /> IM <br /> J � <br /> 20,000 = <br /> 0 25 m <br /> 0 0 <br /> 20 15,000 <br /> c <br /> 0 C <br /> c 15 <br /> 10,000 m <br /> � r <br /> p0 10 <br /> 5,000 <br /> 5 - <br /> 0 A 1 0 <br /> 0615 hrs 945 hrs 1315 his <br /> Operating Time (Hours) <br /> —4--Benzerie --m--TPH-g <br /> 0 <br /> 0 <br /> CHART 2 <br />