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ENGEOLOG OF BORING MWR-28 <br /> I IN C O R P O R A T E D <br /> WELL INSTALLATION DATE DRILLED:August 16,2005 LOGGED/REVIEWED BY:R. Declaro/D.R.H. <br /> RIVER ISLANDS HOLE DEPTH (FT):25.0 ft. DRILLING CONTRACTOR:V&W Drilling <br /> LATHROP, CALIFORNIA HOLE DIAMETER: 10.0 in. DRILLING METHOD: Hollow-Stem Auger <br /> 5044.5.001.01 SURF ELEV(FT-MSL):9.46 ft. HAMMER TYPE: 140 lb.with 30 in.drop <br /> �X <br /> O � <br /> LL N Q <br /> a)U Well: MWR-28 <br /> U o .� Elev.: 11.94 feet MSL(NAVD 88) <br /> L C- DESCRIPTION W v o*L <br /> n a E U o <br /> 0 o cn 5 m 3S <br /> 0 0 <br /> CLAYEY SILT(ML), brown, medium stiff, moist to wet. <br /> Grout <br /> 1 <br /> 5 4"SCH 40 Solid PVC <br /> 8 <br /> 2 SILTY CAY(CL), dark brown, medium stiff to stiff,wet to <br /> saturated. 12 <br /> 6 Bentonite Plug <br /> 10 3 <br /> SANDY SILT(ML),gray,stiff,saturated,fine-grained 13 <br /> sand. <br /> SILTY SAND(SM),olive gray, medium dense to dense, 32 <br /> saturated,fine-grained sand. <br /> 4 16 <br /> 15 22 <br /> 22 <br /> 5 .010 SCH 40 PVC Well Screen <br /> C 39 #212 Filter Pack <br /> N <br /> m <br /> 45 <br /> 20 6 <br /> s SAND(SW),olive gray, medium dense,saturated, medium <br /> to fine-grained sand. 26 <br /> 4"SCH 40 Solid PVC Sump <br /> Slip Cap w/stainless screws <br /> 0 <br /> N 7 <br /> 7 <br /> V <br /> O <br /> N <br /> V <br /> O <br /> 25 <br /> N <br /> U <br /> a 8 Bottom of boring at 25 feet. <br /> Groundwater encountered at 8.5 feet during drilling. <br /> U <br /> g Bottom of well at 22 feet. <br /> 6 <br /> 0 <br /> 0 <br /> N <br /> 9 <br /> 4 <br /> 30 <br />