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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 548 <br /> 1612 W. 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) OWL) (P91L) (pg/L) (P9/L) (pg/L) (pg/L) (09/L) (mg/L) Comments <br /> VW-1 3/28/2000 24.23 --_ - - -- - No FP, No S, No 0 Not <br /> scheduled for sampling <br /> 6/26/2000 25.11 -- - - -- No FP,No S,No O Not <br /> scheduled for sampling <br /> 9/28/20007F- <br /> 27.72 - -- - -- No FP,No S,No O Not <br /> scheduled for sampling <br /> 12/18/200025.50 - - -- No FP,No S, No O Not <br /> scheduled for sampling <br /> 3/14/2001 - 24.33 -- - I No FP, Na S,No O Not <br /> scheduled for sampling <br /> 6/19/2001 - 25.50 - -- - -- No FP,No S,No O Not <br /> scheduled for sampling <br /> 9/11/2001 -- 26.28 -- -- - No FP,No S, No O Not <br /> scheduled for sampling <br /> 12/13/2001 NP - 27.74 <50 2.5 <0.50 <0.50 <0.50 87[2] - No FP, No S,No 0 <br /> 3/12/2002 NP 25.20 <50 -- <0.50 <0.50 <0.50 <0.50 0.68[2] No FP,No S,No O <br /> 6/17/2002 NP 26.95 <50 <0.50 <0.50 <0.50 <0.50 7.8[2] -- No FP,No S,No O <br /> 9/9/2002 NPI 29.54 <50 - 0.55 <0.5 <0.5 <0.5 60 - No FP,No S,No O <br /> 12/4/2002 NP - 29.64 310 - 14 0.59 1.1 6.1 97 No FP,No S, No O <br /> 03/03/2003 NP - 28.77 <100 <1.0 <1.0 <1.0 <1.0 30[2] - <br /> 06/03/2003 NP 28.51 -- <50 - <0.50 <0.50 <0.50 <0.50 22[2] <br /> 09/18/2003 NP 32.03 250 23 <2.5 <2.5 2.6 120[2] <br /> 12/08/2003 NP - 31.89 -- 170 - 10 <5.0 <5.0 <5.0 120[2] <br /> 03/11/2004 -- - 28.52 -- - -- -- -- -- -- - Not Sampled <br /> 05/03/2004 NP 27.96 <50 - <0.50 <0.50 <0.50 <0.50 4.1[2] -- <br /> 06/11/2004 NP 30.28 690 -- 20 <2.5 <2.5 4,6 140[2] 1.7 <br /> 08/03/2004 P 31.71 -- 3,600 230 <5.0 330 370 280[2] 2.0 <br /> 12/22/2004 P - 31.00 3,100 110 <10 180 250 210[2] 4.9 <br /> 03/29/2005 P 28.48 2,900 - 100 <5.0 200 350 160[2] 2.03 <br /> 06/16/2005 P 27.96 - 12,000 - 230 <5.0 500 1,300 150[2] 1.1 <br /> 09/09/2005 P - 30.10 - 3,400 - 110 <5.0 144 300 120[2] 0.19 <br /> VW-2 9/29/1998 NP -- 29.01 - 13,200 - 822 <12.5 1 1,370----1 754 <125 -- No FP, No S,Yes O,[41] <br /> 12/30/1998 NP 27.47 8,950 778 <20 1,180 339 <200 1 -- INo FP, No S,Yes O,[41] <br /> 3/31/1999 -- 25.21 -- -- -- -- ------[No FP, No S,No CO Not <br /> scheduled for sampling <br /> I <br /> Report Date:November 17,2005 Page 10 of 17 <br />