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Project: Ellis Avenues Detention Basin LOG OF MONITORING WELL MW2 <br /> Project Location: Tracy, California <br /> WKA Number: 4630.2100075.0000 Sheet 1 of 1 <br /> Date(s) 1/25/22 Logged is Checked GHG <br /> Drilled By By <br /> Drilling Hollow Stem Auger Drilling V&W Drilling Total Depth 31.5 feet <br /> Method Contractor of Drill Hole <br /> Drill Rig CME 55 HT Diameter Approx.Surface <br /> Type of Hole,inches $ Elevation,ft MSL <br /> Groundwater Level Seal or and Date Measured Backfill Filter pack(sand),bentonite seal and neat cement grout <br /> dified California with 6-mch <br /> Sampling sleeve"1.4""Standard Penetration Drive Weights 1401b auto.hammer with 30"drop Bulk(0'-3') <br /> Method(s) T-stand Comments <br /> m <br /> o ~ GEOLOGIC AND ENGINEERING U.o <br /> > 0� °' 0 -a- y � � REMARKS <br /> w o E E o DESCRIPTION E <br /> cn Zoo 0 �U �U <br /> o Brown, sandy lean CLAY (CL); medium plasticity, CL Cement Grout <br /> = soft/ripped <br /> 15 Brown, stiff, sandy lean CLAY(CL); moist, with CL 11 91 <br /> gravel <br /> 5-1 10 Light yellowish brown, loose, silty SAND with SM 2" diameter <br /> gravel (SM); moist, fine to medium grained, fine to 5 schedule 40 <br /> coarse, subrounded gravel PVC <br /> IL <br /> IL <br /> N <br /> M <br /> N <br /> 10 22 Light yellowish brown, medium dense, silty SAND SM <br /> (S ); moist, fine to medium grained Bentonite Seal <br /> Y <br /> -- 2 feet above <br /> q Ligght yellowish brown, medium dense, silty SAND SM top of screen <br /> (SM); damp, fine to medium grained <br /> 15 35 #212 Filter Sand <br /> Z <br /> Q <br /> m <br /> 0 <br /> Z Ligght brown, very dense, silty SAND with gravel SM <br /> w 20 = (SM); moist, slight plasticity, fine to medium Schedule 40 <br /> ss grained, fine to coarse gravel PVC 0.01" <br /> w =_ <br /> Z = Screen <br /> w <br /> Reddish brown, dense, silty SAND with gravel SM <br /> (SM); moist, fine to medium grained, slight <br /> plasticity, fine to coarse gravel <br /> 25 - <br /> 24 <br /> _O <br /> N <br /> O <br /> M <br /> V <br /> 0 <br /> 30 <br /> 0 27 <br /> cn _ <br /> LU <br /> J = <br /> J <br /> Boring was terminated at approximately 31'/2 feet <br /> below existing ground surface. Groundwater was <br /> not encountered. <br /> 35 <br /> NMWa I l a c e Ku h l FIGURE 11 <br /> 6 A 5 5 0 C I A T E S <br />