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Project: Ellis Avenues Detention Basin LOG OF MONITORING WELL MW3 <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-st(SPTIand 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 /> 0 Brown, sandy lean CLAY (CL); medium plasticity, CL Cement Grout <br /> = soft/ripped <br /> 50 Light brown, dense, silty SAND with gravel (SM); SM 3 120 <br /> moist, fine to medium grained, fine to coarse <br /> gravel <br /> 5- <br /> 64 2 2" diameter <br /> schedule 40 <br /> IL <br /> PVC <br /> IL <br /> N <br /> M <br /> N <br /> N <br /> M <br /> 10 53 Gray, very dense, sandy GRAVEL (GM); moist, GM 3 <br /> fine to coarse gravel Bentonite Seal <br /> Y � � <br /> -- 2 feet above <br /> q top of screen <br /> J � � <br /> 15 30 Light brown, hard, sandy lean CLAY with some CL #212 Filter Sand <br /> Z === gravel (CL); moist, low plasticity, fine to coarse <br /> Q gravel <br /> m <br /> Z <br /> 0 <br /> LU <br /> w 20 = Brown, loose, silty SAND (SM); moist, fine to SM Schedule 40 <br /> w 12 medium grained, slight plasticity PVC 0.01" <br /> Z Screen <br /> w <br /> Brown, medium dense, silty SAND with gravel SM <br /> W (SM); moist, fine to medium grained, fine to <br /> coarse gravel <br /> 0 <br /> 25 <br /> = 49 <br /> Reddish brown, very dense, silt SAND (SM); SM <br /> moist, fine to medium grained, fine to coarse <br /> gravel <br /> o Brown, dense, silty SAND (SM); moist, fine to SM <br /> 30 41 `: medium grained, fine to coarse gravel <br /> LU <br /> cn _ <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 12 <br /> 6 A 5 5 0 C I A T E S <br />