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Drilling Log <br /> ❑❑� GROUNDWATER Monitoring Well MW-7 <br /> ❑❑❑ TECHNOLOGY <br /> See Site Map <br /> Project Chevron/Benjamin Holt owner Chevron USA Products Co <br /> 2905 W Benjamin Holt Dr 02320-2241 3/3/92 For Boring Location <br /> Location _.., Project No Date drilled <br /> Surface Eley Total Hole Depth 315 ft Diameter 8// COMMENTS <br /> Top of Casing Water Level Initial 18 0 ft Static 17 5 ft <br /> Screen Dia 2 in Length 20 ft Type/Size 0 020 fn <br /> Casing Dia 2 In Length 10 ft Type Sch 40 PVC <br /> Filter Pack Material Lapis Lustre #2/12 Rig/Core Type Mable B-53/Split Spoon <br /> Drilling Company Sierra Pacific Method Hollow Stem Auger Permit # <br /> Driller Manuel Arguillo _ Log By Steve KranYak <br /> Checked By Ed Simonrs License No RG 4422 <br /> C O' N <br /> ° <br /> E a L" <br /> U <br /> Description <br /> vi a V CL <br /> p <br /> E 1 E 3 <br /> rn (Color, Texture, Structure) <br /> U1mx occ j Trace < 10%, Little 10% to 20%, Some 20% to 35%. And 35% to 50% <br /> —2 <br /> 0 Bark over brown silty sandy CLAY (soft, moist, no <br /> hydrocarbon odor) <br /> 2 <br /> 4 < <br /> 0 A 9 <br /> 6 <br /> to <br /> S CL <br /> 10 1 B 10 <br /> ,2 <br /> ,4 <br /> 12 — <br /> 14 = <br /> 2 C <br /> 16 115 Brown silty clayey very fine SAND (loose, very moist, no <br /> hydrocarbon odor) <br /> — I <br /> 18 — Encountered wafer 3/3/32 (1400 hours) <br /> sm <br /> 20 = 0 D 10 <br /> ,z <br /> 14 <br /> 22 = Brown sandy SIL T (soft very moist no hydrocarbon odor) <br /> SM <br /> 24 <br /> 04/02/1992 hthlog-mar82 Page 1 of 2 <br />