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MONITORING WELL LOG <br /> PROJECT NAME Former Stefano's Gas Station LOG OF WELL MW-4 <br /> SITE ADDRESS 1419 East Charter Way TOTAL DEPTH (ft) 50 <br /> Stockton, California WELL DIAM in 2 <br /> DATE STARTED September 26, 2001 DRILLER/COMPANY Amador Arroyo <br /> DATE COMPLETED September 26, 2001 V&W Drilling C-57#720904 <br /> DRILLING METHOD Hollow-stem Auger GEOLOGIST/ENGINEER Joseph Ramage, R G #5856 <br /> 5 lit-s oon Sam ler Ramage Environmental <br /> m <br /> o + <br /> r FLLJ <br /> W 0 i IL <br /> O N <br /> W CL E 3g a 2 U V <br /> o O Qr <br /> Q m a to N DESCRIPTION CLU) <br /> ' 0 WELL CONSTRUCTION 2-inch pvc screen(0 020)from 3D-50' 0 <br /> #2112 sand from 28-50',Surge and purge, <br /> Hydrated bentonite chips from 26-28' <br /> 20 1 cement bentonde from surface to 26' <br /> ' Expansion cap,Dolphin lock,8-inch utility box <br /> $ ,', 00 ML CLAYEY SILT Medium tan-brown,dry,stiff,no petroleum odor 5 <br /> 10 <br /> 21 00 M L SILT Light tan-brown,dry,very stiff no petroleum odor 10 <br /> �11 15 12 0 0 ML CLAYEY SILT Medium tan-brown, dry,stiff,no petroleum odor, 15 <br /> I some black organics <br />' 20 1y 00 (grades light tan-beige very stiff no organics) 20 <br /> 25 s 00 ML SANDY SILT Fine sandy silt light orange-brown,dry,very stiff, <br /> D' n' , 25 <br /> no petroleum odor <br /> 30 e 00 MW4-30 CL SILTY CLAY Medium beige-brown dry,stiff,no petroleum odor 30 <br /> 35 15 0 0 ML SILT Some clay medium beige-brown,dry,stiff, 35 <br /> no petroleum odor <br /> 40 „ 00 MW4-40 Static groundwater at 40 55 feet bgs on 9/26/01 40 <br /> CL SILTY CLAY Medium tan-brown,dry,stiff no petroleum odor <br /> 1 s <br /> 45 12 00 ML CLAYEY SILT Medium beige-brown,dry,shff,no petroleum odor 45 <br /> Encountered saturated sal at 46 0 feet below ground surface <br />' 50 e 0 0 MW4-50 (grades wet,no petroleum odor) of 50 <br /> Page t 1 <br />