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Project: Ellis Avenues Detention Basin LOG OF MONITORING WELL MW1 <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 29.5 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); moist, medium CL Cement Grout <br /> 18 plasticity, soft/ripped 14 81 <br /> Light brown, medium dense, silty SAND with SM <br /> _ ravel SM ; moist, fine to medium grained <br /> -= 27 Light yellowish brown, dense, silty SAND with SM 2 <br /> 5 - :. gravel (SM); damp, fine to medium grained, fine to 2" diameter <br /> coarse gravel schedule 40 <br /> IL <br /> PVC <br /> IL <br /> N <br /> N = 51 Light yellowish brown, very dense, silty SAND SM <br /> 10 = with gravel (SM); damp, fine to medium grained, <br /> fine to coarse gravel <br /> o Bentonite Seal <br /> Y <br /> Reddish brown, dense, poorly graded SAND with P-S -- 2 feet above <br /> 4o silt (SP-SM); moist, fine to medium grained, trace top of screen <br /> W 15 `- gravel #212 Filter Sand <br /> Light brown, hard, clayey SAND with gravel (SC); CL <br /> moist, low to medium plasticity, fine to coarse <br /> gravel <br /> Z <br /> o _ <br /> z '= 63 <br /> w -_ <br /> 0 20 - Schedule 40 <br /> w PVC 0.01" <br /> Z Brown, hard, sandy lean CLAY(CL); moist, low to CL Screen <br /> medium plasticity <br /> J _ <br /> w 36 <br /> o <br /> 25 - <br /> 0 <br /> Ligght brown, very dense, silty SAND with gravel SM <br /> (S1VI); moist, fine to medium grained, fine to <br /> coarse gravel <br /> 76 <br /> 0 <br /> 30 <br /> Boring was terminated at approximately 30 feet <br /> w below existing ground surface. Groundwater was <br /> not encountered. <br /> 35 <br /> NMWa I l a c e Ku h l FIGURE 10 <br /> 6 A 5 5 0 C I A T E S <br />