ARCHIVED REPORTS XR0010022 - Laserfiche WebLink

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t 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 P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msl) (feet bgs) (feet msl) (ug1L) (ug/L) (ug1L) Ug/L) (pg/L) (uglL) (pug/L) (mg/L) Comments MW-5 06/11/2003 P 15.10 38.68 -23.58 51 -- 2.7 5.5 1.2 8.4 4.2[2] 2.67 09/23/2003 P 15.10 42.70 -27.60 95 -- <2.5 2.5 <2.5 11 6.0[2]12/09/2003 P 15.10 41.73 -26.63 <50 - <0.50 <0.50 <0.50 0.79 <0,50[2] -- 03/09/2004 P 15.10 39.42 -24.32 950 -- 34 0.66 7.1 <0.50 4.6[2] 2.08 06/23/2004 P 15.10 44.28 -29.18 66 - 3.3 8.7 1.4 10 1.8[21 2.43 09/20/2004 P 15.10 48.44 -33.34 <50 - <10 <10 <10 <10 <10[2] 0.8 12/21/2004 P 15.10 44.99 -29.89 330 -- 3.0 5.1 1.3 11 3.8[2] 1.3 Water Level Data 12/20/04 03/27/2005 P 15.10 41.74 -26.64 <50 - 0.78 1.4 0.60 3.4 6.6[2] 2.2 MW-6 12/4/1992 -- 14.55 63.40 NA 330 - <0.5 <0.5 <0.5 <0.5 NA -- No FP,No S 1/20/1993 - 14.55 61.87 47.32 NA -- NA NA NA NA NA - No FP,No S 1/29/1993 -- -- -- -- 120 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 3/22/1993 -- 14.55 60.28 45.73 NA -- NA NA NA NA NA - No FP,No S 4/6/1993 - 14.55 59.74 45.19 160 -- 0.6 <0.5 <0.5 <0.5 NA - No FP,No S 7/30/1993 - 14.55 60.40 45.85 170 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 11/29/1993 -- 14.55 59.61 45.06 150 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 3/23/1994 - 14.55 54.60 40.05 270 -- 69 69 6 29 NA - No FP,No S 6/22/1994 - 14.55 54.66 40.11 <10 - 0.3 <0.3 <0.3 <0.5 NA - No FP,No S 9/28/1994 - 14.55 58.50 43.95 <50 - 1.2 1 <0.5 <0.5 NA -- No FP,No S 12/1/1994 - 14.55 57.46 42.91 <50 - 0.8 <0.5 <0.5 <0.5 NA -- No FP,No S 2!2811995 - 14.55 54.54 -39.99 55 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 5/19/1995 - 14.55 52.59 -38.04 96*** - <0.5 <0.5 <0.5 <0.5 NA -- No FP,No S 8/28/1995 -- 14.55 54.25 -39.70 120 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 12/7/1995 - 14.55 52.91 -38.36 <200*' -- <0.5 <0.5 <0.5 <0.5 NA -- No FP,No S 2!511996 - 14.55 50.39 -35.84 130 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S 5/30/1996 -- 14.55 47.38 -32.83 140*** - <0.5 <0.5 <0.5 <0.5 <3 - No FP,No S 9/18/1996 -- 14.55 51.26 -36.71 <200*** - <0.5 <0.5 <0.5 <0.5 <3 - No FP,No S 11/26/1996 -- 14.55 49.01 -34.46 <200*'* - <0.5 <0.5 <0.5 <0.5 <4** - No FP,No S 3/24/1997 - 14.55 43.97 -29.42 <50 <0.5 <0.5 <0.5 <0.5 <3 - No FP,No S 5/20/1997 -- 14.55 44.52 -29.97 180 - <2** <0.5 <0.5 <0,5 <3 -- No FP,No S 8/19/1997 - 14.55 48.12 -33.57 190 - <0.5 <0.5 <0.5 <0.5 <5 -- No FP, No S 11/19/1997 -- 14.55 46.26 -31.71 95 - 3.4 2.1 1 2.5 <5 3/4/1998 - 14.55 41.63 -27.08 60 - 1.6 <0.5 <0.5 <0.5 <5 -- No FP,No S 6/26/1998 -- 14.55 39.33 -24.78 101 - 0.734 <0.5 <0.5 <0.5 <5 Report Date:April 25, 2005 Page 12 of 23