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SECOR <br />Internatwnal Incorporated <br />Logged By <br />EG <br />Date Drilled <br />2/13/02 <br />Drilling Contractor <br />GREGG <br />DRILLING <br />Project Name <br />CHEVRON 9-8632 <br />TRACY, CA <br />Method/Equipment <br />SPLIT SPOON <br />HOLLOW STEM AUGER <br />Well Number <br />MW-5 <br />See "Legend to Logs for <br />sampling method, <br />classifications and laboratory <br />testing methods <br />Boring <br />Diam (in) <br />8 <br />Surface <br />Elev (ft) <br />26 98 TOC <br />Groundwater Depth (0) <br />SZ 6 5 FIRST <br />Total <br />Depth (ft) <br />47 0 <br />Drive <br />wt (lbs ) <br />140 <br />Drop <br />Dist (in) <br />30 <br />Well <br />Construction Depth, (It) c4 <br />-.0 -a 3 o <br />xi <br />Description <br />-4 <br />• <br />V <br />' <br />O . <br />T <br />r e <br />e c t„ <br />A <br />• <br />g <br />• <br />.. <br />1.- <br />0 <br />• <br />? c <br />r <br />P r <br />V.;*. <br />. <br />' • <br />c <br />4 <br />' • <br />, . <br />• <br />p. c <br />0 <br />0 . <br />r e <br />Pt <br />, c <br />A <br />' • <br />- .? <br />.? <br />? , <br />I. <br />0 <br />' • <br />0 <br />C <br />f <br />) <br />I. <br />c <br />TRAFFIC <br />— <br />— <br />— <br />_ <br />— <br />—, <br />_ <br />10 <br />_ <br />_ <br />— <br />15 <br />_ <br />— <br />— <br />20 <br />— <br />2 <br />4 <br />5 <br />5 <br />9 <br />10 <br />3 <br />6 <br />9 <br />4 <br />12 <br />19 <br />Asphalt <br />MW5 <br />@5' <br />MW5 <br />010' <br />MW5 <br />@15' <br />MW5 <br />@20' <br />RAfhl) <br />WELL BOX <br />GROUT <br />SILTY SAND/CLAYEY SILTY SAND (SM) dark brown (10YR3/3), <br />fine-to medium-grained sand, loose, moist, petroleum odor (0,40,30,20) <br />Grades to fine-grained sand <br />CLAYEY SILT (ML) dark gray (10YR4/1), low plasticity, soft, wet, <br />petroleum odor (0,5,55,40) <br />CLAYEY SILT (ML) yellowish brown (10YR5/4), medium plasticity, <br />medium stiff, wet, no odor (0,0,55,45) <br />/ SILTY CLAY (CL) yellowish brown (10YR5/4), medium plasticity, stiff, <br />wet, no odor (0,0,35,65) <br />4 <br />The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or <br />samples obtained during drilling Predominant matenal 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 D• on this log apply only at the specific location <br />at the time of drilling and may not be representative of subsurface condit. it,,. I , s or times <br />Project No 77CH 43578 00 0203 Date REVISED 6/1 3/02 PR <br />8632MW5 GPJ <br />LOG OF BOREHOLE <br />Log of Well <br />Figure <br />(sheet 1 of 2)