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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) (pglL) (pg1L) WIL) (pg1L) (pglL) (pg/L) (pglL) (mg/L) Comments
<br /> VW-3 942002 NP - 29.45 -- <50 5.5 <0.5 <0.5 1.4 1.6 - No FP,No S,No O
<br /> 12/4/2002 NP - 30.69 - 610 -- 19 1.9 <0.5 7.9 4.6 -- No FP, No S,Na O
<br /> 03/03/2003 NP -- 8.51 1,300 -- 2D 1.8 2.3 11 3.612] --
<br /> 06l0312003 NP -- 28.55 - 83 -- 4.3 <0.50 <0.50 <0.50 2.7[2] -
<br /> 09/18/2003 NP -- 32.07 -- 630 - 32 <5,0 7.7 <5.0 <5.0[2] --
<br /> 12/08/2003 NP -- 31.92 - 1,400 48 <10 24 <10 <10[2] -
<br /> 03/11/2004 NP -- 28.31 - 1,000 - 68 <10 50 <10 <10[2] --
<br /> 06/11/2004 NP - 30.92 -- 240 - 3.6 <0.5Q <050. 0.77 1.5[2] 1.6
<br /> 08/03/2004 P - 32.31 - 7,000 - 160 <5.0 510 1,100 6.5[2} 1.4
<br /> VW-4 9/29/1998 NP - 29.35 -- 328 - 1.71 <0.5 1.1 i 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 5,Yes O,[42]
<br /> 3/31/1999 -- -- 25.81 - - -- - -- -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6128!1999 - -- 26.94 - - -- - -- - - - -- No FP,No S.No O Not
<br /> scheduled for sampling
<br /> 9/10/1999 -- - 29.00 - - -- - - - - scheduled
<br /> S, O Not
<br /> scheedd uleedd for ssaampling
<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 /> - 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 /> 9111!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 /> EJ312002 NP 26..10 <50 <<00.50 <0.50 <<0.50 <0.50 32[2] - No FP,No S,No O
<br /> 05 <050 98[2] - No FP,No S,No O<0.50502/ 00597NP 2774 [3]
<br /> Page 11 of 15
<br /> Report Date:August 13,2004
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