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Woodward-Clyde Consultants ' PROJECT NAME _QRA Stockton —_ NO <br /> MONITORING WELL LOCATION Caltrans Shop 10 (MW 7) ELEVATION AND DATUM +100 00 tL <br /> • DRILLING AGENCY Datum Exploration DRILLER Steve/Anthony DATE STARTED 315/90 31"G <br /> DATE IS ED <br /> DRILLING EQUIPMENT CME 75 COMPLETION 70 SAMPLER Modified <br /> d fied <br /> DEPTH I <br /> DRILLING METHOD B'Hollow stem auger DRILL BIT CME 4 Tooth Carbide NO OF DIST S3 UNDIST <br /> SAMPLES <br /> SIZE AND TYPE OF CASING 4'PVC screwthreaded FROM 700 TO 05 F7 WATER FIRST COMPL 24 HRS 57 58 58 <br /> LFVFL <br /> TYPE OF PERFORATION 0 020'slotted FROM 695 TO 495 FT LOGGED BY CHECKED BY <br /> SIZE AND TYPE OF PACK Clemintina 03 Lonestar Sand FROM 700 TO 450 FT G Heyman M Bonkowski <br /> TYPE OF NO 1 Bentonite pellets FROM 450 TO 430 FT <br /> SEAL NO 2 Cement grout FROM 430 TO 10 FT <br /> 2 c <br /> m MATERIAL DESCRIPTION 3: ° <br /> Asphaltic Concrete and Base Material— — — — — — — — — — — — — <br /> SAND — — — No Hydrocarbon odor SP <br /> medium brown, very fine to fine, little sill/clay, occasional mica, OVM =0 ppm <br /> poorly graded moist, occasional gravel In lenses <br /> 5 --- — — — — — — --- — — -- — — -- — — --- — — <br /> 1 CLAY No Hydrocarbon odor CL <br /> brown medium gray, medium plasticity,damp, little silt and OVM m 0 ppm CH <br /> very fine sand, generally homogenous transition zone from <br /> _Ian-d-above has tlggulaarIIy_LnteLTIxW sand and cJAy — — — — — _.-. — — — <br /> SILT ML <br /> 10 medium brown little very fine sand and some clay, low <br /> 2 plasticity, damp, occasional mottled with medium yellow No Hydrocarbon odor <br /> brown occasional lenses of sand and small gravel In cuttings OVM s 0 ppm <br /> 15 SANDY SILT ML <br /> 3 medium yellow brown,very fine sand, little clay with few clay No Hydrocarbon odor <br /> pockets to 4 mm In diameter, low plasticity,damp,occasional OVM =0 ppm <br /> organics dark gray and dark gray mottled areas, gradational with <br /> silt above <br /> SILTY SAND with SAND <br /> 20 4 coarsely mottled yellow brown and tan very fine sand with little <br /> fine, little clay damp, occasional organic fine material- dark No Hydrocarbon odor <br /> gray, generally homogeneous gradational with sandy silt above OVM a 0 ppm <br /> cuttings very clayey — — — — — — — — — — — — — — — — <br /> Sw <br /> SILTY SAND - SANDY SILT ML - <br /> 25 medium yellow brown,very fine sand, Irregulanly Interlayered No Hydrocarbon odor <br /> 5 sand and silt, as above, up to some clay OVM a 0 <br /> PPm <br /> — Sw <br /> 30 Interlayered SAND and CLAY CL <br /> 6 medium brown gray,very fine to fine sand with up to some No Hydrocarbon odor <br /> clay,clay has up to some silt and very fine sand, gradational OVM a 0 ppm <br /> layering, law plasticity,damp,occasional white and dark <br /> mottling and organic debris <br /> 3 <br /> LOG OF MONITORING WELL 140 MW-7 SHEET 1 OF 2 <br />