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6 <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-38 <br /> Boring Surface Groundwater Depth(ft.): Total Drive Drop <br /> Diam.(in.): Elev,(ft.): V 9.5 First Water Depth(ft.): wt.(Ibs.): Dist.(in.): <br /> 8 20.0 140 30 <br /> o a E <br /> Well a <br /> 9 3 Description Q <br /> Construction �L 2 s <br /> a N <br /> Traffic Rated <br /> Well Box <br /> Grout <br /> 5 5 FAT CLAY(CH):black(IOYR 2/1),stiff,damp,high <br /> 5 plasticity,faint hydrocarbon odor(0,0,100). 1 OS-38 1100 <br /> 5 @5 <br /> Q _ __________ ________ _ <br /> 10 6 SILT WITH SAND(ML):brown(10YR 5/3),fine grained 4 <br /> 5 sand,stiff,moist to wet,moderate plasticity,faint <br /> 6 hydrocarbon odor 0 25 75 . 6 OS-38 1110 <br /> FAT CLAY(CH):dark greenish gray(LOGY 4/1),fine @10.5' <br /> Bentonite grained sand,very stiff,moist,high plasticity,separate <br /> Chips phase hydrocarbon sheen,stringers of black staining, <br /> moderate odor,(0,10,90). <br /> 15 7 AS ABOVE:dark greenish gray(IOY 4/1),stiff,strong <br /> Sand 7 h drocarbon odor 0 0 100 . 392 OS-38 1120 <br /> 9 SILT WITH SAND(ML):dark greenish gray(IOY 3/1), 328 @15' <br /> 5 fine grained sand,very stiff,moist to wet,moderate SPH <br /> 2"Sparge 5 plasticity,separate phase hydrocarbon sheen,strong 46 <br /> Tip 7 drocarbon odor 0 25 75 . <br /> 5 POORLY GRADED SAND(SP):dark greenish gray(IOY 13 <br /> 5 3/1),fine grained sand,medium dense,wet,moderate <br /> 8 hydrocarbon odor(0,100,0). <br /> 20 5 22 <br /> 5 <br /> 7 <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 />