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Table 1
<br /> Groundwater Elevation and Analytical Data
<br /> - __ .ARCO Service Station No. 2130
<br /> 7906 N. EL Dorado Street, Stockton, CA
<br /> TOC Depth to Water Level Ethyl- Total
<br /> Well Date PI Elevation 'Water Elevation TPHg TPHd Beniene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (p91L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (mg/L) Comments
<br /> MW-2 3/31/1992 -- 15.19 61.37 -46.18 NA - NA NA NA NA NA -- No FP,No 5
<br /> 4/21/1992' 15.19 61.70 =46.51 1,500 - -A 6 <0.5 22 53 NA -- No FP, No S
<br /> 5/11/1992 - 15.19 62.36 -47.17 NA - NA NA NA NA NA -- No FP,No S
<br /> 6/23/1992 - 15.19 62.44 -47.25 NA - NA NA NA NA NA -- No FP,No S
<br /> 7/8/1992 -- 15,19 63.66 -48.47 2,100 - 140 3.6 27 45 NA - No FP,No S
<br /> 8/10/1992 - 15.19 64,58 -49.39 NA - NA NA NA NA NA -- No FP,No S
<br /> 9/15/1992 - 15.19 65.22 -50.03 NA -- NA NA NA NA NA - No FP,No S
<br /> 10/6/1992 - 15.19 65.38 -50.19 950 - 90 5.4 12 7.9 NA - No FP, No S
<br /> 11/11/1992 -- 15.19 64.69 -49.50 NA - NA NA NA NA NA No FP,No S
<br /> 12/4/1992 - 15.19 63.96 -48.77 NA - NA NA NA NA NA -- No FP,No S
<br /> 1/20/1993 -- 15.19 62.69 -47.50 1,400 - 41 <2.5 24 6.4 NA - No FP, No S
<br /> 3/22/1993 - 15.19 60.79 -45.60 NA -- NA NA NA NA NA - No FP,No S
<br /> 4/671993 15,19 60.27 -45.08 1,000 - 7.1 <2.5 31 8.8 NA -- No FP, No S
<br /> 7/30/1993 -- 15.19 60.98 -45.79 1,200 - 35 2.6 30 15 NA - INo FP,No S
<br /> 11/29/1993 - 15.19 60.05 -44.86 1,100 - 28 3.3 18 4.5 NA - INo FP,No S
<br /> 3/23/1994 15.19 55.14 -39.95 1,200 14 7.7 6,9 5.2 NA -- No FP, No S
<br /> 6/22/1994 -- 15.19 55.22 -40.03 1,200 -- 54 15 13 5.8 NA jNo FP, No S
<br /> 9/28/1994 - 15.19 59.06 -43,87 1,600 -- 370 2.9 47 13 NA -- No FP,No S
<br /> 12/1/1994 15,19 58.00 -42.81 220 - 21 <0.5 2.6 <0.5 NA -- No FP, No S
<br /> 2/28/1995 -- 15.19 55,08 -39.89 110 - <0.5 <0.5 <0.5 <0.5 NA - No FP, No S
<br /> 5/19/1995 - 15.19 53.15 -37.96 400 - 23 <0.5 2.1 <0.5 NA No FP,No S
<br /> 8/28/1995 - 15.19 54.83 -39.64 650 -- 84 <1* 9.3 1.1 NA - No FP,No S
<br /> 12/7/1995 -- 15.19 53.47 -38.28 540 - 18 <1* 3 <1* NA -- INo FP, No S
<br /> 2/5/1996 - 15.19, 51.93 736,74 310 2.8 0.6 1..3 0.8 . - NA -- No FP, No S
<br /> 5/30/1996 -- 15.19 47,91 -32.72 510 - 31 1 5.9 1,3 <7** No FP,No S
<br /> 9/18/1996 - 15.19 51.80 -36.61 920 -- 150 <2.5* 22 3.5 <15* - No FP,No S
<br /> 11/26/1996 - 15.19 49.60 -34,41 520 - 21 <0,5 2.7 0.6 7 -- No FP, No S
<br /> 3/24/1997 -- 15.19 44.50 -29.31 <500*** -- <3** <3** <3** <3** <20** -- No FP,No S
<br /> 5/20/1997 -- 15.19 45.09 -29.90 720 - 71 <1* 131.1 <6* No FP,No 5
<br /> 8/19/1997 - 15.19 48.69 -33.50 1,200 - 240 <5 41 <5 <50** -- No FP, No S
<br /> 11/19/1997 - 15.19 46.77 -31.58 <50 -- 1.7 0.89 <0.5 0.87 <5 --
<br /> 3/4/1998 -- 15.19 42.18 -26.99 <50 - 2.2 <0.5 <0.5 <0.5 5.1 - No FP,No S
<br /> 6/26/1998 -- 15.19 39.87 -24,68 53.4 - 3.65 <0.5 <0.5 1.12 6.52
<br /> Report Date:April 25,2005 Page 5 of 23
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