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0 S ECOR Logged By: Date Drilled: Drilling Contractor Project Name: Method/Equipment: well Number: STTC-Ozone Well Install Hollow Stem Auger C.Melanion 11/7/03 Cascade Drilling Stockton,California CAL Split Spoon OS-34 Boring Surface Groundwater Depth(ft.): Total Drive Drop Diam.(in.): Elev.(ft.): SZ 9.5 First Water Depth(ft.): wt.0bs.): Dist.(in.): 8 19.5 140 30 Well o o _E u H E. Z 3 A Construction Q Description.2 .2 � E n n. A o Traffic Rated Well Box Grout o'. 'v. 5 5 FAT CLAY(CH):light olive brown,(2.5Y 5/3),stiff, 0 5 moist,high plasticity(0,0,100). SZ 10 5 ELASTIC SILT WITH SAND(MH):brown(10Y 5/3), 0 5 fine grained sand,stiff,moist to wet,medium plasticity 0 OS-34 840 Bento7 0 20 80 . @ 10' Chips ite FAT CLAY(CH):brown(IOYR 5/3),fined grained sand, Chips stiff,moist,high plasticity,(0,10,90). Sand _____ ____ ________ ___ 15 7 SILTY SAND(SM):dark greenish gray,(IOY 4/1),fine 0 7 grained sand,medium dense,moist to wet,(0,65,35). 0 OS-34 850 2" Sparge 9 FAT CLAY WITH SAND(CH):brown(IOYR 513),fine 0 @15' Tip 5 grained sand,very stiff,moist,high plasticity(0,15,85). 0 5 SANDY SILT(ML):dark greenish gray(10Y 5/3),fine 7 grained sand,stiff,moist to wet,moderate plasticity 0 03070 . SILTY SAND(SM):dark greenish gray,(l0Y 4/1),fine 0 rained sand medium dense moist to wet 0 65 35 . 20 FAT CLAY(CH):brown(l OYR 5/3),fined grained sand, stiff moist hi h plasticity,(0,10,90). The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or samples obtained during drilling. Predominant material types shown on the log may contain different materials and the change from one predominant material type to another could be different than indicated. Descriptions on this log apply only at the specific location at the time of drilling and may not be representative of subsurface conditions at other locations or times. Project No. Date 9/29/04 DWR Log of Well OS-33-57.GPJ Figure LOG OF BOREHOLE (sheet 1 of 1)