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Table 3 Soil Boring and Well Construction Details 7-Eleven Store No 14117 2725 Country Club Boulevard Stockton, California Well Screen Screen Well Drill Depth Diameter Top Bottom length Comments I D Date (feet bgs) (inches) (feet bgs) (fest 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 Monitoring Wells MW-1 05/33/99 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 Grossgradient to tank/pump area MW-4 05/14/99 25 2 10 25 15 Crossgradient 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 1 08/14/03 50 2 40 50 10 Proposed Borings and Wells MW-9 1 pending 20 2 5 20 15 Offsite well on Former Exxon MW-10 pending 20 2 5 20 15 Offsite well southeast of site 1-1 pending 26 2 21 26 5 Oxygen Injection Well GP-1 pending 15 — -- -- — Geoprobe with grab water sample GP-2 pending 15 -- — -- Geoprobe with grab water sample GP-3 pending 15 -- — -- Geoprobe with grab water sample CPT-1 pendin 110 - -- -- CPT with (3)grab water samples CPT-2 I pending 110 -- -- — CPT with(3)grab water samples CPT-3 pending 110 -- — -- -- CPT with(3)grab water samples Explanation Wells are of poly vinyl chlonde(PVC)construction bgs=Below ground surface UST=Underground storage tanks File 7 11 Stores/14117rrabiesl14117 Current Well Boning Sum xrs Page 1 of 1