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TABLE 1 Soil Boring and Well Construction Details ARCO Service Station No, 2130 7906 North EI Dorado Street, Stockton, CA Construction Elevation Boring Depth Borehole Casing Screened Filter Pack Bentonite Seal Cement Seal Well I.D. Diameter Diameter Interval Interval Interval Interval Comments Date (TOC f¢et) (feet bgs) (inches) (inches) (feet bg¢I (feet (feet b g¢I Monitoring Wells (MVVI B2 / MW-1 12/16/91 15.71 75 10 4 60-75 58-75 56-58 N56 Overdrill 361 MW-2 12/1 B191 16.31 75 8 4 60-7556-75 54-56 0-54 Overdrlll Be/ MW-3 12/19/91 17.15 75 10 4 60-75 57-75 55-57 0-.55 Overdrill B9 / MW-4 08/13/92 15.69 75 10 4 55-7553-75 51-53 0-51 Overdnll B16 / MW-5 08/20/92 16.17 7B 10 4 59-78 56-78 54-56 0-54 Pressure Grout B21 / MW-6 11/16/92 15.68 74 8.25 2 59-74 57-74 54-57 0-54 Pressure Grout - B-22 / MW-7 11/17/92 15.71 74.5 8.25 2 54-74.5 52-74.5 4952 0-49 Pressure Grout > 820 is FS 8.26 P bi �s 6 525 0 =1 70 AM Nil : 12/9/03 -� MW-11 07/06/06 15.80 50 8.25 2 30-50r 2650 - 25-28 0.25 Ovendrill - MW-12 07/06/06 15.93 50 8.25 2 30-50.- 28-50 '- 25-28 0-25 Overdrill MW-13 07/05/06 16.38 50 8.25 2 30-50 i- 213-50 25-28 0-25 Pressure Grout, - MW-14 10/01/07 15.35 50 8 2 30-50 - 28Z0 , 25-28 0-25 Pressure Grout t- 1Y0 MW-15 08/16/07 15.44 50 0 2 30-50 - 28-50 25-28 D-25 Overdrill MW-16 08/16/07 16.92 50 8 2 30-50 28-50 - 25-28 0-25 Pressure Grout MW-17 08/17/07 15.55 50 8 2 30-50 26-50 25-28 0-25 Overdrill MW-18 08/13/07 15.91 75 8 2 60-75 . 58-75 55-58 0-55 Overdrill MW-19 09/27/07 15.44 75 8 2 60-75 58-75 55-58 0.55 Pressure Grout /Vb MW-20 08/20/07 15.87 100 8 2 90-100- 68-100 85-88 0-80 Pressure Grout MW-21 09/26/07 15.75 50 8 2 3050 / 28-50 24-28 0-24 Pressure Grout Na MW-22 00/17/07 16.60 5D 8 2 30-501 28-5D 25-28 0-25 Overdrill MW-23 08/15/07 16.67 75 8 2 60-75 - 58-75 5558 0-55 Overdrill Vapor Wells (VW) B3 / VW-1 12/17/1991 15.47 65 B 4 44-65- 1} 65 :32-34 40-42 0-02 Overdrill B4 / VW-2 12/17/1991 15.60 65 8 4 29-65 28-6524-28 0.24 Overdrill B5 / VW-3 12/18/1991 16.06 65 8 4 40-65� 35-5531-35 0-31 Pressure Grout B7 / VW-4 12/18/1991 16.00 55 8 4 40-65 - 36-6532-36 0.32 Ovendrill B10 / VWS 8/14/1992 16,42 61 .5 8 4 36-51� 34-51 0.32 Overdrill B11 / VW-6 8/17/1992 17.04 46.5 8.25 4 16-40 - 14-4112-14 0-12 Pressure Grout B13 / vW-8 8/18/1992 16.19 61 .5 8.25 4 40-60 39-61 .5 37-39 0-37 Pressure Grout _ _ B141 VW-9 8/1B/1992 1553 41 .5 8 4 16-40 -- 1541 .5 13-15 0-13 Pressure Grout _ B15 / VW-10 8/19/1992 16.00 61 .5 8.25 4 30-59, 29.5-61 .5 29-29.5 0-29 Pressure Grout - - 829 / VW-11 8/11/1995 16.59 70.1 10 4 5.545-69 44-70.1 4244 0-42 Pressure Grout 1328 / VW-12 8/11/1995 15.80 65.3 10 4 rJsAF4o34.5 44-65.3 41-44 0-41 Pressure Grout 2130 Soil Boring and Well Construction Details.xlsx Page°1 of 2 Stantec