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rr r r r r r r r r r r r r r rr r r ■■� r <br /> sn'Fell NP-2-60 duringC-S arge System OperationGraph 7 Concentrations of Hydrocarbon' <br /> i <br /> Former Unocal Service Station No. 0187 437 East Miner Ave. <br /> Stockton, CA <br /> 25,000 <br /> 8,000 <br />`` Additional Sparge Points Installed <br /> I <br /> 7,000 <br /> 3 <br /> ' 20,000 <br /> 6,000 � <br /> i <br /> I <br /> j. 5,000 <br /> 15,000 .o <br /> Began Microsparge a <br /> CL <br /> CL 4,000 <br /> vs N <br /> � c <br /> BaselineOL *4 % <br /> m <br /> 10,000 3,000 <br /> 2,000 <br /> 5,000 <br /> 1,000 <br /> 0 0 <br /> 0) M $ o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 o a 0 0 0 0 0 0 0 0 0 0 <br /> in Q �? (� tG t0 M N N cO <br /> SZ) N o c� .� .� �. .. uj '� `v �V N N �V `r �N N <br /> �nccr. c�' c� ir. a� o � n? rr �n � a3 �oao <br /> Sampling date <br /> - TPHg (in ppb) --*—benzene (in ppb) <br />