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GROUNDWATER MONITORING WELL LOG <br /> PRJECT NAME San Joaquin County Motor Pool UST Site LOG OF WELL MW-7 <br /> SITE ADDRESS 1810E Hazelton Avenue BORING DIAM (in) 8 <br /> Stockton California WELL DIAM In 2 <br /> ' DATE STARTED February 25 2005 DRILLERICOMPANY Van Leonard <br /> DATE COMPLETE=D February 25 2005 Woodward Drilling C 57#710079 <br /> DRILLING METHOD Hollow-stem Auger(BK-81) GEOLOGISTlENGINEER R David Smith R G <br /> ' <br /> Split-spoon sam ler Ramage Envlronmentaf <br /> Z <br /> 0 <br /> m F m <br /> v r W J J 3 Y <br /> LU 0 <br /> W <br /> F m $e a a m to m +n 1— <br /> CIL c 12 2 z <br /> O <br /> W N m a 0 )) z 7(q DESCRIPTION 0p <br /> 0 fill Four inches of asphalt underlain by base Hand dug to 3 feet + 0 <br /> ' cL CLAY WITH SILT Dusky yellowish brown mast medium stiff medium <br /> plasticity no odor <br /> CLAYEY SILT Moderate yellowish brown moist stiff no odor <br /> n <br /> Unit becomes mottled pale and moderate yellowish brown medium stiff <br /> 10 ,0 21 with black organic matter at 10 feet 10 <br /> ,5 <br /> Unit becomes stiff at 15 feet clay content increases <br /> ' 15 � 29 15 <br /> ML <br /> Unit becomes medium stiff at 20 feet clay content decreases trace <br /> 20 ;; 42 very fine sand 20 <br /> ,B <br /> i <br /> ' 25 57 Unit becomes stiff at 26 feet clay content increases 25 <br />' Unit becomes very stiff at 30 feet zones of whitish caliche <br /> 30 66 30 <br /> SILTY SAND Moderate yellowish brown moist medium dense 60% <br /> 35 :n 65 very line micaceous sand 40°,6 silt 35 <br /> n <br />' SM <br /> 4p 73 40 <br /> B 44 <br /> SILT WITH CLAY AND SAND Moderate yellowish brown moist stili <br /> 45 » 75 ML 70%silt 20%clay 10%very fine 45 <br /> micaceous sand <br />' Static water level measured al 45 43 feet on 323r05 <br /> SILTY CLAY Mottled pale and moderate yellowish brown moist to wet <br /> 50 64 MW 7 50 very stiff trace whitish caliche 50 <br /> CL <br /> Saturated sod observed of 54 feet bgs on 225W <br /> i <br /> � 55 � <br /> $$ ;° NM MW 7 55 ML SANDY SILT Moderate yellowish brown wet medium stiff 55 <br /> Terminated drilling at 55 feet sampled with split spoon to 56 5 feet <br /> Installed groundwater monitoring well MW 7 <br /> Screen(0 020 inch)from 35 to 55 feet #3 Sand from 33 to 55 feet <br /> 60 Hydrated bentonite from 30 to 33 feet 60 <br />' Neat cement/bentonite(20 1)grout from 1 to 30 feet <br /> Wellhead completed within 12 inch traffic rated socurily pox in concrete at grade <br /> 1 of <br />