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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Retail Site No 11191 <br /> 1469 E Hammer lane, Stockton, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) {1rg/L) (pg1L) (pg1L) (PgIL) (pg/l-) (pg/L) (pg1L) (mg1L) Comments <br /> MW-5 10/17/2003 P 2291 5490 -31 99 1 600 R -- <50 <50 <50 <50 3,600* -- <br /> 01/26/2004 P 2291 5038 -2747 1 300 — <100 <100 <100 <100 4,300' -- <br /> 04/27/2004 P 2291 5008 -2717 3,100 -- <50 <50 <50 <50 4,600` -- <br /> 07101/2004 P 2291 5441 -3150 1,400 — <50 <50 <50 <50 4,900' — <br /> 10/04/2004 P 2291 5837 -3546 1900 -- <50 <50 <50 <50 4,800* — <br /> 01/12/2005 P 2291 5308 -3017 2000 — <100 <100 <100 <100 6 200' 2 99 <br /> 05/11/2005 P 2291 4965 -2674 <5,000 -- <50 <50 <50 <50 4,200" — <br /> 07/19/2005 P 2291 5340 -3049 <5,000 -- <50 <50 <50 <50 4,900" — <br /> MW-6 04/10/2003 P 2207 4595 -2388 <50 -- <050 <050 <0 50 <050 <25 — <br /> 07/1 V2003 P 2207 4965 -2758 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` 340 <br /> 90/17/2003 P 2207 5427 -3220 <50 -- <0 50 <0 50 <0 50 <050 <0 50` — <br /> 01/26/2004 P 2207 4974 -2767 75 — <0 50 <0 50 <0 50 <0 50 <0 50` -- <br /> 04/27/2004 P 2207 4970 -2763 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` -- <br /> 07101/2004 P 2207 5412 -3205 <50 — <050 <050 <0 50 <0 50 <0 50` — <br /> 10/04/2004 P 2207 5788 -3581 <50 — <0 50 <050 <0 50 <0 50 <0 50` — <br /> 01/12/2005 P 2207 5207 -3000 <50 — <0 50 <050 <0 50 <0 50 <0 50` 329 <br /> 05/11/2005 P 2207 4891 -2684 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` 1 — <br /> 07/19/20051 P 1 2207 1 5364 -31 57 <50 — <0 50 <0 50 <0 50 <050 <0 5o" <br /> MW-7 04/10/2003 P 2243 4630 -2387 <50 — <0 50 <050 <0 50 <0 50 <25 <br /> 07/11/2003 P 2243 4960 -2717 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50` 390 <br /> 10/17/2003 P 2243 5485 -3242 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` — <br /> 01/26/2004 P 2243 5013 -2770 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` — <br /> 04/27/2004 P 2243 4956 -2713 <50 - <0 50 <0 50 <0 50 <0 50 <0 50` -- <br /> 07/01/2004 P 2243 5396 -31 53 <50 — <0 50 <0 50 <0 50 <0 50 <0 50` — <br /> 10/04/2004 P 2243 5819 -3576 <50 <0 50 <0 50 <0 50 <0 50 <0 50` <br /> 01/12/2005 P 2243 5285 -3042 <50 - <0 50 <0 50 <0 50 <0 50 <0 50` 385 <br /> 05/11/2005 P 2243 4949 -2706 <50 — <0 50 <0 50 <0 50' <0 50 <0 50' -- <br /> 07119/2005 P 1 2243 5293 1 -3050 1 <50 <0 50 1 <0 50 <0 50 <0 5o <0 50` -- <br /> Report Date August 31,2005 Page 3 of 4 <br />