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I <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 760 <br /> 225 S Cherokee, Lodi, CA <br /> TQC Depth to Water Level Ethyl- Total <br /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (wgIL) (pg/L) (pg/L) (1rgIL) (pg/L) (pg/L) (pg/L) (mg/L) Comments <br /> MW-1 10/3/2002 P 5291 6060 -769 <50 <05 <0 5 <0 5 <0 5 091 -- <br /> 01l3012003 P 5291 5701 -410 <50 -- <0 50 <0 50 <0 50 12 057 2 0 <br /> 04/10/2003 P 5291 5667 -376 <50 <0 50 <0 50 <0 50 <0 50 16 0 80 <br /> 07/24/2003 P 5291 5982 -691 <50 -- <0 50 <0 50 <0 50 <0 50 076 32 <br /> 10/17/2003 P 5291 61 14 -823 <50 — <0 50 <0 50 <0 50 <0 50 055 1 5 <br /> 01/21/2004 P 5291 5811 -520 <50 — <0 50 <0 50 <0 50 <0 50 <0 50 1 1 <br /> 04/26/2004 P 5291 5871 -580 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50 10 <br /> MW-2 10/3/2002 P 5327 6091 -764 410 — 32 85 6 95 37 — <br /> 01/30/2003 P 5327 5735 -408 <50 UJ -- <0 50 UJ <0 50 UJ <0 50 UJ 12 J <0 50 UJ 1 1 <br /> 04/10/2003 P 5327 5707 -380 130 -- <0 50 <0 50 <0 50 16 056 G90 <br /> 07/24/2003 P 5327 6022 -695 300 -- 22 <1 0 <1 0 2 9 63 2 0 <br /> 10/17/2003 P 5327 6152 -825 80 — <0 50 <0 50 <0 50 066 30 10 <br /> 01/21/2004 P 5327 5841 -514 <50 — <0 50 <0 50 <0 50 <0 50 056 090 <br /> 04126/2004 P 5327 5884 -557 260 -- <2 5 <25 <2 5 70 4 8 060 <br /> MW-3 10/3/2002 P 5438 6073 -635 140 — <05 <0 5 1 089 <05 -- <br /> 01/30/2003 P 5438 5834 -396 130 -- <0 50 <0 50 <0 50 078 <0 50 21 <br /> 04/10/2003 P 5438 5741 -303 140 — <0 50 <050 <0 50 1 1 0 68 18 <br /> 07/24/2003 P 5438 61 17 -679 160 -- <0 50 <050 <0 50 055 <0 50 43 <br /> 10/17/2003 P 5438 6249 -811 93 — <0 50 <0 50 <0 50 <0 50 <0 50 21 <br /> 01/21/2004 P 5438 5945 -507 410 -- <0 50 <0 50 <0 50 <0 50 <0 50 2 5 <br /> 0412612004 P 5438 5969 -531 1 310 — <2 5 1 <25 <2 5 <2 5 <2 5 21 <br /> TPI-Ig=Total petroleum hydrocarbons as gasoline(reported as GRO-gasoline range organics in analytical report) <br /> TPHd=Total petroleum hydrocarbons as diesel(reported as DRO-diesel range organics in the analytical report) <br /> MtBE=Methyl tert-butyl ether <br /> DO=Dissolved oxygen <br /> TOC=Top of Casing <br /> msl=mean sea level <br /> bgs=below ground surface <br /> ,ug/L=micrograms per liter <br /> mg/L=milligrams per liter <br /> PINP=purged/not purged <br /> <=below given laboratory detection limit <br /> —=not measured or analyzed <br /> Data Qualifier Definitions <br /> U=The analyte was analyzed for,but was not detected above the sample reporting limit <br /> Report Date May 25,2004 : Page 7 of 2 <br /> I <br />