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SECOR <br />International incorporated <br />Logged By <br />EG <br />Date Drilled <br />2/14/02 <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-6B <br />See "Legend to Logs" for <br />sampling method, <br />classifications and laboratory <br />testing methods <br />Bonng Surface <br />Dam (in) Elev (ft) <br />8 25 90 TOC <br />Groundwater Depth (ft) <br />g 12 FIRST <br />Total <br />Depth (ft) <br />50 0 <br />Drive <br />wt (lbs ) <br />140 <br />Drop <br />Dist (in) <br />L 30 <br />Well <br />Construction <br />= <br />i. Sample Recovery Blows/6" Description 2 <br />. a , <br />' I <br />P <br />, ,- <br />! .. <br />. <br />t 4 <br />r <br />ft <br />CI <br />p .:i. <br />`7 ; c <br />A <br />. • <br />9 <br />a <br />C k <br />If <br />. 1 <br />4 <br />! c r. 0• <br />! ' <br />c : <br />! f <br />i . <br />1111' <br />1.., i <br />C :: <br />' <br />a , <br />'a <br />P <br />,,, <br />c <br />. <br />5 <br />t 4 <br />r , . <br />C <br />., <br />7 ; r <br />.0 <br />0 • <br />Q <br />.0 <br />c <br />? C I <br />If <br />! • <br />> 4 <br />! c <br />7 . 0 " <br />' <br />,. c <br />. <br />! G <br />R <br />TRAF TRAFFIC <br />WELL BOX <br />GROUT <br />5 <br />DA <br />151 <br />201 <br />— <br />_ <br />1 <br />—, <br />_ <br />— <br />—' <br />— <br />_ <br />__, <br />--- <br />_ <br />3 <br />3 <br />4 <br />Asphalt - <br />MW6B <br />@5' <br />@IO' <br />MW6B <br />@15' <br />MW6B <br />@20' <br />A -- <br />CLAYEY SILT (ML) dark gray (lOYR4/1), low plasticity, soft, moist, <br />slight petroleum odor (0,0,60,40) <br />6 <br />15 <br />7 <br />7 <br />8 <br />2 <br />2 <br />2 <br />MW6B <br /> <br />SILTY CLAY (CL) dark grayish brown (I0YR4/2), medium plasticity, <br />medium stiff, moist, petroleum odor (0,0,35,65) <br />SILTY CLAY (CL) brown (10YR5/3), medium plasticity, soft, wet, no <br />odor (0,0,30,70) <br />Same as above <br />The substrata descnptions above are generalized representations and based upon visuallmanual classification of cuttings and/or <br />samples obtained during dnIling 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 ntions on this log apply only at the specific location <br />at the time of drilling and may not be representative of subsurface cond EtBotkif lions or times <br />Project No 77CH 43578 00 0203 Date REVISED 6/13/02 pr <br />8632MW6B GP1 <br />LOG OF BOREHOLE <br />Log of Well <br />Figure <br />(sheet 1 of 3)