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10 Drilling Log 4 <br />UUn, GROUNDWATER Monitoring <br />Well MW -1 <br />❑❑❑ TECHNOLOGY <br />Project Chevron -Charter way. Stockon Owner Chevron USA Products Company <br />See Site Hap <br />For Boring Location <br />Location 503 Charter way, Stockton CA Prol• No. 02070 0071 <br />COMMENTS. <br />Surface Elev. Total Hole Depth 5f.5 ft. Diameter 8 in. <br />Top of Casing Water Level Initial 35 ft. Static <br />Screen: Dia 2 in- Length 20 ft. Type/Size 0.020 in. <br />Casing: Dia 2 in. Length 30 ft. Type Sch 40 PVC <br />Fill Material 03 Sand Rig/Core CME-75/51pilt Spoon <br />Drill Co. SES, Inc. Method Hollow Stem Auger/PID <br />Driller Mike Duffy Log By Bruce Beale Date 03/15/95 Permit f 5179 <br />Checked By Ed Simons License No. RG*4422 <br />c <br />O <br />1 <br />C <br />O <br />N <br />Description <br />v- <br />3 a <br />of <br />a 0, <br />.. <br />v S a <br />C _ U <br />t� <br />�0 <br />m <br />(Color, Texture, Structure) <br />0 <br />in x <br />CD <br />? <br />Trace < 10%. Little 10% to 20%, Some 20% to 35%. And 35% to 50% <br />mo <br />—2 <br />0 <br />2" asphalt over 4" base coarse. <br />Gravelly silty sandy CLAY (10,10,40,40): brown -black, moist, slight <br />2< <br />< <br />hydrocarbon odor. <br />CL <br />c <br />< <br />4 <br />` <br />` <br />Silty CLAY (20,80): light brown with white streaks and patches, <br />< <br />MW -1 <br />moist, no hydrocarbon odor. <br />< <br />1.0 <br />-5' 2 <br />6 <br />` <br />` <br />6 <br />CL <br />8 <br />` <br />`Silty <br />CLAY (40,60): light brown, moist, no hydrocarbon odor. <br />10 <br />< <br />< <br />1.0 <br />Mw -1 <br />-10' 6 <br />9 <br />CL <br />12 <br />< <br />< <br />14 <br />< <br />` <br />Sandy silty CLAY (20,30,50): brown with green -gray mottling, aha <br />< <br />< <br />Mw -1 <br />white streaks and patches, moist, no hydrocarbon odor <br />34 <br />-15' 14 <br />16 <br /><< <br />20 <br />CL <br />< <br />c <br />18 <br />< <br />< <br />< <br />< <br />Mw -1 <br />(grades with abundant root casts <Imm diameter) <br />20 <br />< <br />`4r <br />38 <br />-20' 2 <br />< <br />< <br />3 <br />6 <br />CL <br />22 <br />< <br />< <br />< <br />(grades gray) <br />24 <br />` <br />04/12/1995 mNog-maf93 <br />