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TABLE 4 Page 3 of 3 <br /> SUMMARY OF DETECTED GROUNDWATER CONCENTRATION DATA <br /> Tracy High School <br /> Tracy Joint Unified School District <br /> Sample Location: P-22 P-23 P-24 <br /> Sample ID: GW-051707-RTS-002 GW-051707-RTS-005 GW-051707-RTS-009 <br /> SanrpleDate: 5/17/2007 5/17/2007 5/17/2007 <br /> Sample Type: <br /> Parameter. Units <br /> S VOCs <br /> Naphthalene ug/L 5.0 U 5.0 U 0.19 J <br /> Petrl Prod <br /> Total Petroleum Hydrocarbons-extractable(DRO) ug/L 51 B) 48 BJ 100 U <br /> Total Petroleum Hydrocarbons-purgeable(GRO) ug/L 100 U 34 J 100 U <br /> Notes: <br /> U=The analyte was analyzed for, but was not detected above the reported sample quantitation limit <br /> J=Lab qualified as estimated <br /> B=Lab qualified as possible method blank contamination <br />