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Table 3 Soil Boring and Well Construction Details 7-Eleven Store#14117 2725 Country Club Boulevard Stockton, California Boring Well Screen Screen Well Drill Depth Diameter Top Bottom Length Comments I.D, mate (feet bgs) (inches) (feet bgs) (feet bgs) (feet) Soil Borings OSGP-1 09/24/98 20 2 -- -- -- OSGP-2 09/29/98 20 2 -- -- — OSGP-3 09/29/98 20 2 -- -- -- OSGP-4 09/29/98 20 2 -- -- -- OSGP-5 09/29/98 20 2 -- -- -- OSGP-6 09/29/98 20 2 -- -- -- GP-7 09/29/98 20 2 -- -- -- GP-8 09/29/98 20 2 -- -- -- GP-9 10/02/98 20 2 -- -- -- GP-10 10/02/98 20 2 -- -- -- GP-11 10/02/98 20 2 -- -- -- GP-12 10/02/98 26 2 -- -- -- GP-13 10/02/98 20 2 -- -- -- GP-14 10/02/98 31 2 -- -- -- GP-15 10/02/98 20 2 -- -- -- GP-16 10/02/98 20 2 -- -- -- GP-17 10/02/98 20 2 SB-1 08/14/03 50 8 -- -- -- East of UST pit GP-1 04/27/05 16 2 -- -- -- Geo robe with grab water sample GP-2 04/27/05 16 2 -- -- -- Geoprobe with grab water sample CPT-1 04/27/05 110 2 -- -- -- CPT with (3) grab water samples CPT-2 1 04/26/05 1 110 2 -- -- -- CPT with 3) grab water samples CPT-3 1 04/26/05 110 2 -- -- -- CPT with (3) grab water samples Monitoring Wells & Infection Wells MW-1 05/13/99 30 2 10 30 20 MW-2 05/13/99 51 2 5 25 20 Conductor casing to 13' MW-3 05/13/99 25 2 10 25 15 Cross radient to tank/pump area MW-4 05/14/99 25 2 10 25 15 Cross radlent to UST MW-5 10/30/01 20 2 5 20 15 MW-6 10/30/01 20 2 5 20 15 MW-7 10/30/01 20 2 5 20 15 MW-8 08/14/03 1 50 1 2 1 40 50 10 1-1 L 04/28/05 1 255 2 20 25 5 Oxygen Injection Well Proposed Borings and Wells MW-9 pending20 2 5 20 15 Offsite well on Former Exxon MW-10 I pendin 1L 20 2 5 20 15 Offsite well southeast of site Explanation Welts are of poly-vinyl-chtonde(PVC)construction bgs=Below ground surface UST= Underground storage tanks File 7-11 Stores114117rrables114117 Current Well Boring Sum As Page 1 of 1