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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 5469 <br /> 130 S Wilson Way, Stockton, CA <br /> TOC I Depth to Water Level Ethyl- Total <br /> Well Date PI Elevation I Water Elevation GRO DRO Benzene Toluene benzene Xylenes ME DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (Irg/L) (NgIL) (ligIL) (pg/L) (lig1L) (µg/L) (mg/L) Comments <br /> MW-12 02127/2006 — � 1618 41 81 -2563 1 — I — — — — — — -- <br /> 03/06/2006 P 16 18 4178 -2560 <50 — <0 50 <0 50 <0 50 <0 50 <0 50 12 <br /> MW-13 02/27/2006 — 16 06 4170 -2564 — — — — — — -- <br /> D310612006 P 16 06 4165 -2559 <50 — <0 50 <0 50 <D 50 <0 50 0 56 10 <br /> i <br /> Notes <br /> ORO=Gasoline range organics <br /> DRO=Diesel range organics <br /> MtBE=Methyl tert-butyl ether <br /> DO=Dissolved oxygen <br /> ft=feet <br /> bgs=below ground surface <br /> msl=mean sea level <br /> TOC=top of casing <br /> ug/L=micrograms per liter <br /> mgIL=milligrams per liter <br /> PIMP=purged/not purged <br /> <=below given laboratory detection limit <br /> -=not measured or analyzed <br /> DO measured with field instruments <br /> Note Historical groundwater monitoring and chemical analytical data back to 2000 are included in Appendix D <br /> Report Date April 25,2006 a Page 3 of 3 <br />