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0 <br /> S ECOR <br /> Logged By: Date Drilled: Drilling Contractor Project Name: Method/Equipment: Well Number: <br /> STTC-Ozone Well Install Hollow Stem Auger <br /> C.Melanion 11/6/03 Cascade Drilling Stockton,California CAL Split Spoon OS-37 <br /> Boring Surface Groundwater Depth(ft.): Total Drive Drop <br /> Diam.(in.): Elev.(ft.): Q 9.5 First Water Depth(ft.): wt.(lbs.): Dist.(in.): <br /> 8 19.5 140 30 <br /> c a E E <br /> Well cd <br /> v `° z i— <br /> r x 3 Description ca <br /> Construction n v o <br /> Traffic Rated <br /> Well Box <br /> Grout <br /> 5 5 FAT CLAY(CH):black(10YR 2/1),stiff,damp,high <br /> 5 plasticity,faint hydrocarbon odor(0,0,100). 0 OS-37 1200 <br /> 6 @5' <br /> Q _______ ____ _________ <br /> 10 6 SILT WITH SAND(ML):brown(10YR 5/3),fine grained <br /> 6 sand,stiff,moist to wet,moderate plasticity,faint <br /> 8 hydrocarbon odor 0 25 75 . 0 OS-37 1210 <br /> ' Bentonite FAT CLAY(CH):dark greenish gray(LOGY 4/1),fine @10.5' <br /> Chips grained sand,very stiff,moist,high plasticity,SPH sheen, <br /> stringers of black staining,moderate odor,(0,10,90). <br /> Sand <br /> 15 7 66 <br /> 7 <br /> 9 SANDY SILT(ML):dark greenish gray(10Y 5/3),fine 476 OS-37 1220 <br /> 2"Sparge grained sand,stiff,moist to wet,moderate plasticity,faint @ 15.5' <br /> TIP 5 `hydrocarbon odor(0 25,75�.______________J 354 <br /> 5 POORLY GRADED SAND WITH SILT(SP)�reenish <br /> 8 black(l0Y 2.5/1),fine grained sand,medium dense,wet, 131 <br /> 5 tron h drocarbon odor 0 90 10 . 16 <br /> 5 SILTY SAND(SM):dark greenish gray(5GY 3/1),fine <br /> 20 7 grained sand,medium dense,moist to wet, moderate <br /> 1 drocarbon odor, 0 65 35 . <br /> IISILT WITH SAND(ML):dark greenish gray(10Y 5/3), <br /> (fine grained sand,stiff,moist to wet,moderate plasticity, <br /> faint hydrocarbon odor 0 5�7�).____________1 <br /> The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or <br /> samples obtained during drilling. Predominant material types shown on the log may contain different materials and the change from <br /> one predominant material type to another could be different than indicated. Descriptions on this log apply only at the specific location <br /> at the time of drilling and may not be representative of subsurface conditions at other locations or times. <br /> Project No. Date 9/29/04 DWR Log of Well <br /> OS-33-57.GPJ Figure <br /> LOG OF BOREHOLE <br /> (sheet 1 of 1) <br />