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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 PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (erg/L) (ug/L) (pg/L) (Pg/L) (pg/L) (Pg/L) (Pg/L) (mg/L) Comments
<br /> VW-3 08/03/2004 P 32.31 7,000 -- 160 <5.0 510 1,100 6.5[2] 1.4
<br /> 12/22/2004 P 31.62 9,800 110 <10 480 990 <10[2] 4.5
<br /> 03/29/2005 P 29.15 5,200 - 75 <5.0 330 710 <5.0[2) 2.15
<br /> 06/16/2005 P 28.60 -- <50 1.2 <0.50 <0.50 0.68 20[2] 1.09
<br /> 09/09/2005 P - 30.74 - 6,800 - 66 X5.0 440 740 <5.0[2] 1.37
<br /> VW-4 9/29/1998 NP 29.35 328 - 1.71 <0.5 1.1 6.12 2,560 -- No FP,No S,Yes O,[42]
<br /> 12/30/1998 NP 27.20 - 97.2 - <0.5 0.562 <0.5 0.746 2,240 No FP,No S,Yes O,[42]
<br /> 3/31/1999 - 25.81 -- -- -- -- -- -- -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/28/1999 -- - 26.94 -- -- -- -- -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/10/1999 -- 29.00 - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/13/1999 28.12 - - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/28/2000 24.89 - - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/26/2000 29.88 - -- -- -- -- -- -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/28/2000 -- - 28.39 - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/18/2000 26.19 - - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/14/2001 -- 24.87 -- -- -- - -- -- -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/19/2001 -- -- 26.28 - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/11/2001 29.13 - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12113/2001 NP 28-50 <50 -- <0.50 <0.50 <0.50 <0.50 100[2) - No FP,No S,No O
<br /> 3/12/2002 NP 26.10 <50 - <0.50 <0.50 <0.50 <0.50 32[2] - No FP,No S,No O
<br /> 6/17/2002 NP 27.74 59[3] - <0.50 <0.50 <0.50 <0.50 98[2] No FP,No S, No O
<br /> 9/9/2002 NP 30.28 73 -- <0.5 <0.5 <0.5 <0.5 110 No FP,No S,No O
<br /> 12/4/2002 NP 27.51 94 - <0.5 1.8 0.53 23 39 - No FP,No S,No O
<br /> 03/03/2003 NP 26.25 <50 <0.50 <0.50 <0.50 <0.50 0.88[2]
<br /> 06/03/2003 NP 26.13 <50 - <0.50 <0.50 <0.50 <0.50 0.95[2]
<br /> Report Date:November 17,2005 Page 13 o117
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