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0 <br /> S ECOR <br /> �FG <br /> ed By Date Drilled Drilling Contractor Project Name Method/Equipment well Number <br /> CASCADE CHEVRON#1001621 HOLLOW STEM AUGER <br /> 12/11/03 DRILLING BANTA,CA SPLITSPOON MW-68A <br /> Boring Surface Groundwater Depth(ft) Total Drive Drop <br /> Diam(in) Elev(ft) SZ 8 5 FIRST Depth(ft) wt(lbs) Dist(in) <br /> 7 1925 415 140 30 <br /> _ o <br /> Well z <br /> p W <br /> s z 3 Description a <br /> Construction <br /> R � <br /> Traffic Rated 3 5"Concrete slab with 1/2 inch steel rebar <br /> Well Box ,a Pea Gravel fill in former tank pit <br /> 8"Steel <br /> Conductor ° <br /> Casing O <br /> o�5-DO <br /> 11 <br /> Hycrated <br /> Bentonite Q <br /> Chips <br /> 5Z 18 a0 660 1100 <br /> 20 <br /> Bentonite 22 Pea Gravel fill in former tank pit,extreme hydrocarbon <br /> Pellets 10 O odor,sheen&free product <br /> 2"Diameter 3 7 JST-3f 1145 <br /> SCH 40 PVC SILTY SAND(SM) dark greenish gray(GLEY 4/5GY), 320 Sample 1105 <br /> Casing 70-80%fine to medium grained sand,trace coarse sand, sent to <br /> wet,medium dense,20-30%, medium plastic fines,extreme lab <br /> 42/12 Sand hydrocarbon odor,sheen with free product <br /> Pack <br /> 0 02" Screen 15 8 SANDY CLAY(CL) yellowish brown(IOYR 5/4), 96 1110 <br /> 8 40-50%fine sand,wet,medium stiff to stiff, 50-60% <br /> 10 medium plastic fines,slight hydrocarbon odor <br /> SILTY SAND(SM) yellowish brown(IOYR 5/6), <br /> 20 60-70%fine grained sand,wet,medium dense,30-40%low <br /> 6 plastic fines,slight hydrocarbon odor 202 1120 <br /> _X <br /> 8 <br /> 10 <br /> SAND TO SILTY SAND(SP-SM) yellowish brown <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 77CH 11621 18 0550 Date 1/15/2004 DWR Log of Well <br /> 1621MW68A GPJ Figure <br /> LOG OF BOREHOLE <br /> (sheet 1 of 2) <br />