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U Table 1 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. Date (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 1 04/27/05 16 2 -- -- GP-2 04/27/05 16 2 -- - CPT-1 04/27/05 110 2 - -- - CPT to collect laboratory samples only CPT-2 04/26/05 110 2 - -- -- CPT to collect laboratory samples only CPT-3 04/26/05 110 2 -- -- CPT to collect laboratory samples only Monitoring Wells&Injection 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 2 10 25 15 Crossgradient to tank/pump area MW-4 05/14/99 25 2 10 25 15 Crossgradient to UST MW-5 10/30/01 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 50 2 40 50 10 1-1 04/28/05 25.5 2 20 25 5 Oxygen Injection Well 1-2 -- TBD 2 20 35 15 Proposed Oxygen Injection Well 1-3 -- TBD 2 20 35 15 Proposed Oxygen Injection Well 1-4 -- TBD 2 20 35 15 Proposed Oxygen Injection Well 1-5 -- TBD 2 20 35 15 Proposed Oxygen Injection Well 1-6 -- TBD 2 20 35 15 Proposed Oxygen Injection Well Explanation Wells are of poly-vinyl-chloride(PVC)construction bgs=Below ground surface UST=Underground storage tanks File:7-11Stores/14117/Tables/14117 Current Well Boring Sum.xls Page 1 of 1