ARCHIVED REPORTS XR0010019 - Laserfiche WebLink

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Table 1 Groundwater Elevation and Analytical Data ARCO Service Station No. 2130 7906 N. EL Dorado Street, Stockton, CA TOC Depth to Water Level Ethyl- Total Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msi) (feet bgs) (feet msl) (pglL} (pg/L) WL) (pg/L) (ug/L) (E.g1L) (pglL) (mg/L) Comments MW-10 2/5/1996 14.38 50.13 -35.75 350 - 0.7 <0.5 <0.5 <0.5 NA - No FP,No S 5/30/1996 - 14.38 47.09 -32.71 350*** -- <6** <0.5 <0.5 <0.5 <6** -- No FP, No S 9/18/1996 -- 14.38 50.84 -36.46 510 -- <15** 1 <0.5 <0.5 <9*' -- No FP,No S 11/26/1996 -- 14.38 48.72 -34.34 <600*** <0.5 <0.5 <0.5 <0.5 <10** -- No FP,No S 3/24/1997 - 14.38 43.77 -29.39 <500*** - <5** <0.8* c0.5 <0.5 <7`" -- No FP, No S 5/20/1997 -- 14.38 44.20 -29.82 460 -- <5"* <0.5 <0.5 <0.5 <7** - No FP,No S 8/19/1997 - 14.38 47.66 -33.28 440 -- <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S 11/19/1997 - 14.38 45.95 -31.57 510 - 2.2 2.2 0.93 3.1 <5 - 3/4/1998 -- 14.38 41.43 -27.05 110 - 0.66 <0.5 <0.5 <0.5 <5 -- No FP,No S 6/26/1998 -- 14.38 39.11 -24.73 329 - 4.75 <0.5 <0.5 <0.5 <5 - 9/1/1998 - 14.38 40.78 -26.40 295 - <0.5 <0.5 <0.5 <0.5 <5 -- 12/2/1998 - 14.38 38.23 -23.85 407 6.89 <0.5 <0.5 0.873 19.5 -- 3/31/1999 - 14.38 34.71 -20.33 2.17 - 6.41 0.948 0.763 2.69 7.48 - 6/4/1999 14.38 35.86 -21.48 288 - <0.5 <0.5 <0.5 <0.5 6.53 -- 912l1999 -- 14.38 40.26 -25.88 152 -- <0.5 <0.5 <0.5 <0.5 <5 - 11/29/1999 - 14.38 38.58 -24.20 198 - 3.58 <0.5 <0.5 0.61 9.08 3/16/2000 -- 14.38 34.69 -20.31 270 -- 0.741 <0.5 <0.5 <0.5 5.95 -- 6/26/2000 - 14.38 37.05 -22.67 389 -- <0.5 <0.5 <0.5 <0.5 <2[2] - 9/28/2000 - 14.38 41.28 -26.90 <50 - 0.87 <0.5 <0.5 <0.5 <2[2] -- 12/19/2000 -- 14.38 37.20 -22.82 <50 -- <0.5 <0.5 <0.5 <0.5 <2.5 -- 3/15/2001 -- -- - - - -- - - -- -- -- - Well Covered 6/20/2001 - -- 36.98 -- 11,000[5] - <2[4] <2[4] <2[4] <2[4] <2[2] . 9/12/2001 - - -- - -- -- -- -- - - -- Well Covered 12/12/2001 - - - - -- - - -- -- -- - - Well Covered 3/13/2002 -- - - - - - - -- - - -- -- Well Covered 6/18/2002 - -- - -- - -- - -- -- -- - - Well Covered 9111/2002 -- - -- - -- - - -- - - - Wel!Covered 12/18/2002 - - -- -- -- - -- - - - -- Well Covered 06/11/2003 -- -- - -- - - -- - -- -- -- Well Covered 09/25/2003 -- - - -- - -- - -- -- -- -- Well Destroyed vW-1 5/20/1997 -- -- 44.16 -- 340,000 -- 330 540 2,100 13,000 <1,200* - No FP,No S 9/1/1998 -- -- 41.75 NA - NA NA NA NA NA -- NA 12/2/1998 - - 38.43 - NA NA NA NA NA NA - NA Report Date:October 21,2005 Page 17 of 24