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<br /> 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 PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (,ug1L) (pg/L) WL) (pglL) (pglL) (Irg/L) (ug/L) (mg/L) Comments
<br /> VW-5D 3/31/1999 - 25.65 -- - -- -_ - - - - - No FP,Yes S,Yes O Not
<br /> scheduled for sampling
<br /> 6/28/1999 -- -- 26.74 -- -- -- -- -- - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9!1011999 - 29.00 -- - - - - - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/13/1999 - -- 28.20 - - - - -- - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/28/2000 -- 24.97 - - - - -- - - - No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 6/26/2000 -- -- 29.81 -- -- -- - - - - - - No FP,No S, No 0 Not
<br /> scheduled for sampling
<br /> 9/28/2000 - - 28.31 - - -- __ - -- -- No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 12JI812000 - -- -_ _ __ _ - __ - - Yes FP,Yes S,Yes O
<br /> Not scheduled for
<br /> sampling
<br /> 3/14/2001 - -- 25.00 -- -- - - - - - - Yes FP Not scheduled for
<br /> sampling
<br /> 6/19/2001 -- - 24.95 -- -- - -- - No FP,No S,Yes O Not
<br /> - scheduled for sampling
<br /> 9/11/2001 -- -- 28.00 -- -- -- -- - - - - -- No FP,No S,Yes O Not
<br /> -
<br /> N scheduled for sampling
<br /> 12/13/2001 NP 28.42 54.000 840 2,300 1,100 17,000 67[2] No FP,No S, No 0
<br /> 3/12/2002 NP -- 25.65 1,400[3] - <5.0 8 <5.0 96 <2.5[2][5] -- No FP,No S, No O
<br /> 6/1712002 NP - 27,67 - 3,300 - 12 40 36 1,200 <2.5[2] No FP,No S,No 0
<br /> 9/9/2002 NP - 29.39 -- 3,100 -- <5 <5 <5 870 <5 - No FP,No S,No O
<br /> 12/4/2002 NP -- 29.65 -- 3,200 000 <100 220 3,200 <100 -- No FP,No S.No O
<br /> 03/03/2003 NP - 27.48 1,400 -- 7.0 11 23 480 <5.0[2] --
<br /> 06/03/2003 NP - 27.28 -- 650 -- 7.2 2.6 J 1.5 210 <1.0[2] -
<br /> 09/18/2003 -- -- - -- - - - - - Well dry
<br /> 12/08/2003 -- - - - -- -- - - -- -- - - Muddy Bottom, Dry,Not
<br /> Sampled
<br /> 03/11/2004 NP -- 26.81 -- 25,000 - 170 260 880 9,100 <100[2]
<br /> 05/03/2004 NP -- 29.81 6,100 - <50 <50 140 1,100 <50[2] --
<br /> O611112004 - -- 30.83 5,700 - <5.0 <5.0 15 350 X5.0[2] --
<br /> Report Date:July 26,2004 Page 12 of 15
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