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Graph 1- Concentrations of Hydrocarbons in Well U-3 during C-Sparge System Operation <br /> Former Unocal Service Station No. 0187 <br /> 437 East Miner Ave, Stockton, CA <br /> 60,000 0 <br /> -5 <br /> 50,000 <br /> -10 <br /> 1P T A <br /> 40,000 <br /> CL -15 <br /> C • • • <br /> N • Al <br /> 4) 30,000 • -20 w <br /> i <br /> C7 <br /> CD <br /> a -25 <br /> ~ 20,000 <br /> Baseline -30 <br /> 10,000 <br /> Began Microsparge -35 <br /> Additional Sparge Points Installed <br /> 0 -40 <br /> o�N Oh osR) Oro os1 00 00 OR 00 00 O� 00' O`1' Off' 00' 00 00 O'b O'b Oma' Off` Off` O� <br /> 00\O�\ O"5\00\ O\ Oh\O�\ O`t\��\ O\ 00\�O\ Oh\OA\ O'l\�O\ Oo'\�O\ ,� �\ O0\ Otx\�� O\ 00\�O\ �\ O\ t\ <br /> Sampling date <br /> —■—TPHg (in ppb) —♦-Benzene(in ppb) GWE <br />