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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 Depth to Water Level 1 Ethyl- Total <br /> Well Date I PI Elevation Water Elevation GRO DRO Benzene i Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (pg1L) (pglL) (pg1L) (pglL) (pg1L) (pglL) (m9IL} Comments <br /> MW-8 09/08/20051 P 1646 4350 -2684 6 900 I -- <50 I <50 <50 <50 95 00 11 <br /> 1210812005 P 1 1646 4384 -2738 <5,000 - <50 <50 <50 <50 4,100 1 9 <br /> MW-9 03/16/2005 P 1621 I 4465 -28 44 <50 <0 50 I <0 50 <050 <050 0 54 64 <br /> 06/08/2405 P 1621 4226 -2605 <50 <0 50 <0 50 <050 <0 50 --r-050 60 <br /> 09/08/2005 P 1621 4340 -2719 <50 — <0 50 c0 50 <0 50 <0 50 <0 50 18 <br /> 1210812005 P 1621 4355 -2734 <54 I -- <0 50 c0 50 <0 50 1050 <br /> 16 60 <br /> MW-10 03116120051 P 1640 4460 -2820 90 1 1 <0 50 <0 50 <0 50 64 42 <br /> 06108/20051 P j 1640 4280 -2640 <50 -- <0 50 <0 50 <0 50 <0 50 39 39 <br /> 0910812005' P 1 1640 4320 -2680 83 -- <0 50 <0 50 <0 50 —<050 —<050 16 <br /> 12108!2005 P I <50 -- <0 50 I c0 50 —<050 I—<050 54 34 <br /> Notes <br /> GRO=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 /> uglL=micrograms per liter <br /> mglL=milligrams per liter <br /> PINP=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 /> I <br /> I <br /> Report Date February 2,2006 Page 2 of 2 <br />