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S ECOR <br /> Logged By: Date Drilled: Drilling Contractor Project Name: Method/Equipment: well Number: <br /> STTC-Ozone Well Install Air Rotary <br /> C.M. 10/17/03 Cascade Drilling Stockton,California Casing Hammer OS-13B <br /> Boring Surface Groundwater Depth(ft.): Total Drive Drop <br /> Diam.(in.): Elev.(ft.): SZ 13 First Water Depth ft): wt.(Ibs.): Dist-(in.): <br /> 8 37.0 140 30• <br /> Well <br /> s x Description <br /> Construction o <br /> Ca a <br /> a <br /> 149 <br /> 155 <br /> Bentonite _______________ <br /> 30 SILTY SAND(SM):dark grayish green(5G 2.5/2),fine grained sand,medium <br /> #3 Sand dense,wet to moist,moderate hydrocarbon odor,(0,60,40). 326 <br /> 2" Sparge POORLY GRADED SAND WITH SILT(SP-SM):dark greenish gray(IOGY 3/1), <br /> Tip fine grained sand,medium dense,wet,moderate hydrocarbon odor,(0,90,10). <br /> 35 WELL GRADED SAND(SW):greenish black(5GY 2.5/1),fine-course grained 2696 <br /> sand,well graded,dense,wet,fragments of decaying wood,strong hydrocarbon odor, (over <br /> (0,100,0). range) <br /> 40 <br /> 45 <br /> The substrata descriptions above are generalized representations and based upon visuaUmanual 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. 770T.43673.06.0007 Date 11/19/04 Log of Well <br /> OS 1B-16B.GPJ Figure <br /> LOG OF BOREHOLE <br /> (sheet 2 of 2) <br />