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No Woodward-Clyde Consultants ! PROJECT NAME OSA ockton <br /> St <br /> MONITORING WELL LOCATION Caltrans Shop 10 (Mw 8) ELEVATION AND DATUM +100 36 ft <br /> DRILLING AGENCY Datum Exploration DRILLER Steve/Anthony DATE STARTED 3/&90 DATE FINISH <br /> COMPLETION California <br /> DRILLING EOUIPMENT CME 75DEETtj 70 SAMPLER Modified <br /> DRILLING METHOD 8 Hollow stem auger DRILL BIT CME 4 Tooth Carbide NO OF DIST 13 UNDIST <br /> SAMPLES <br /> SIZE AND TYPE OF CASING 4"PVC screwihreeded FROM 700 TO 05 FT WATER FIRST 57 COMPL 58 24 HRS 58 <br /> TYPE OF PERFORATioN 0 020"slotted FROM 605 TO 495 FT LOGGED BY CHECKED BY <br /> SIZE AND TYPE OF PACK Clemintina#3 Loneslar Send 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 !T <br /> L 2 C <br /> $m 2 MATERIAL DESCRIPTION 3 0 ° <br /> m <br /> o - A <br /> y� U <br /> Asphaltic Concrete, Gravel Base & Fill Sand <br /> — — — — — — — — — — — — — -- — -lojjyclLocaLk2on_Wor <br /> CLAY (fiLL) djrk bt pn�or iia sl}_Lttl�fln�sap�, IQy�pl tic�c, d&lp— OVM = 0 ppm — CL <br /> SILT (FILL) yellow brown some clay low plasticity, damp ML <br /> 5 SILT No Hydrocarbon odor <br /> 17 red brown, some very fine sand occasionally some clay, low OVM=0 ppm ML <br /> plasticity, damp, layers grade to sandy or clayey silt, layers-�1 7 <br /> thick with clayey layers<1 thick, occasional dark gray debris (fine) <br /> Interbedded SILT and SAND ML <br /> 10medium yellow brown,up to some clay, sand is very fine to Sw <br /> 2 19 medium with occasional coarse or small pebbles, low plasticity, No Hydrocarbon odor <br /> 14 damp, occasional dark brown stain OVM = 0 ppm <br /> 5 SILTY CLAY CLAYEY SILT CL <br /> 3 medium yellow brown,up to some very fine sand, low plasticity, No Hydrocarbon odor ML <br /> damp clay areas have slight blocky internal sturcture,generally OVM =0 ppm <br /> homogeneous <br /> 20SAND with Interlayered SILT Sw- <br /> - " <br /> 4 medium yellow brown,sand is very fine with up to some clay/silt, No Hydrocarbon odor ML <br /> 17 <br /> silt has up to some very fine sand and ctay, low plasticity silt, OVM= 0 ppm <br /> damp occasionally up to medium sand <br /> 25 CLAY and SAND with SILT CL- <br /> 5 medium light gray with yellow brown mottling and offwhite No Hydrocarbon odor SW <br /> streaks, gray is typically clay silty clay, yellow brawn very line OVM = 0 ppm <br /> sand with silt and clay, appears churned by bioturbatlon,off white <br /> streaks are possibly former tubuler or plant roots, crumbly, low <br /> plasticity,damp <br /> 30 CLAY grades to SILT CL <br /> 8 more event} bedded, has <1 mm thick off white caliche layers,faint Na Hydrocarbon odor ML <br /> unidentifiable odor like solvent OVM -0 ppm Sw <br /> 5 <br /> LOG OF MONITORING WELL NO MW-8 SHEET 1 OF 2 <br />