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SECOR <br />International Incorporated <br />Logged By <br />EG <br />Date Drilled <br />2/13/02 <br />Dnlling 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-7 <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 />27 79 <br />Groundwater Depth (ft) Total <br />Depth (ft) <br />21 5 <br />Drive <br />wt (lbs ) <br />140 <br />Drop <br />Dist (in) <br />30 <br />Well <br />Construction Depth, (ft) Sample Recovery -o -- <br />0 <br />gei <br />Descnption 2 <br />1 <br />• <br />: E . <br />I <br />, <br />, <br />-r-..._ <br />:Ai_ <br />• <br />' • <br />: fi <br />A <br />' . <br />111 <br />= <br />= <br />E <br />= <br />= <br />= <br />= _ <br />= — <br />= <br />=- <br />= — — • — <br />— <br />= <br />_.= <br />= <br />= _ <br />= <br />= <br />_ <br />7-7 <br />• <br />• - <br />TRAFFIC <br />RA1ED <br />WELL BOX <br />GRour <br />SBEENTAL ONITE <br />SAND <br />0 020" <br />SLOTTED <br />SCREEN <br />THREADED <br />END CAP <br />— <br />---, <br />_ <br />_ <br />5— <br />— <br />_ <br />_ <br />101 <br />_ <br />_ <br />— <br />15 <br />_ <br />_ <br />20 <br />— <br />_ <br />_ <br />1 <br />i <br />5 <br />5 <br />9 <br />4 <br />8 <br />8 <br />8 <br />20 <br />21 <br />' <br />Grass <br />No recovery <br />CLAYEY SILT (ML) dark gray (2 5Y4/2), fine-grained sand, low <br />plasticity, moist, petroleum odor (0,5,50,45) <br />CLAYEY SANDY SILT (ML) light olive brown (2 5Y5/4), fine-grained <br />sand, low plasticity, soft, wet, slight petroleum odor (0,15,50,35) <br />SANDY CLAYEY SILT (ML) light olive brown (2 5Y5/4), fine-grained <br />sand, low plasticity, wet, no odor (0,30,50,20) <br />MW? <br />@10' <br />MW? <br />@15' <br />MW7 <br />@20' <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 s'on this log apply only at the specific location <br />at the time of drilling and may not be representative of subsurface cond EaatiS ions or times <br />Project No 77CH 43578 00 0203 Date REVISED 6/13/02 PR <br />8632MW7 GPJ <br />LOG OF BOREHOLE <br />Log of Well <br />Figure <br />(sheet 1 of 1)