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M MM M M = I M <br /> Entrance <br /> SUBSTATION <br /> r—& MNM%ft <br /> OW-4 OW-5 LEGEND <br /> m�10�TPH lsoconcentratian line for <br /> / soil (ppm) <br /> G) OW-t Observation well location <br /> 1 Notes: <br /> I 10 Dashed Isoconcentration lines indicate areas <br /> Zell , of less confident estimate duo to sparse data. <br /> Ow z ' 100 /W- <br /> 0 <br /> ,fl 20 feet � <br /> FORMER <br /> TANK 0000 <br /> LOCATION <br /> /OFFICE BUILDING <br /> 000 <br /> OW-3 <br /> FIGURE 3-5 TPH Isoconcentration Lines Estimated for Soils- <br /> Tracy Service Center Underground Tank Investigation, <br /> February 1988 <br />