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SECOR <br />International Incorporated <br />Logged By <br />EG <br />Date Dnlled <br />2/1 3/02 <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-S <br />See "Legend to Logs" for <br />sampling method, <br />classifications and laboratory <br />testane irnethods <br />Boring <br />Diam (in) <br />8 <br />Surface <br />Elev (ft) <br />26 98 TOC <br />Groundwater Depth (ft) <br />6 5 FIRST <br />Total <br />Depth (ft) <br />47 0 <br />Dove <br />wt (lbs ) <br />140 <br />Drop <br />Dist (in) <br />30 <br />Well <br />Construction Depth, (ft ) Sample Recovery Blows/6' Descnplion P. <br />c <br />VI <br />. <br />' 4 <br />o <br />' v <br />' V <br />v <br />' c <br />0 <br />. <br />> 4 <br />• <br />' • <br />! c <br />'17 ' <br />' c <br />• . , <br />C <br />I <br />, <br />. <br />. • <br />• <br />'. <br />--- <br />-.=-- <br />— .._ --• ...— <br />— — __ __. <br />=---- _...- <br />11- <br />a <br />a <br />. <br />• <br />• <br />4 <br />c <br />0 b, <br />• <br />• <br />c <br />o <br />c <br />0 , <br />BENTONITE <br />SEAL <br />• SAND <br />. 0 020" <br />SLOTTED <br />' SCREEN <br />'THREADED <br />END CAP <br />,i, <br />— <br />— <br />_ <br />30 <br />_ <br />_ <br />— <br />35 <br />_ <br />— <br />— <br />40 <br />— <br />_ <br />— <br />_ <br />45 <br />_ <br />_ <br />_ <br />15 <br />16 <br />20 <br />4 <br />7 <br />19 <br />22 <br />50 <br />23 <br />50/3" <br />19 <br />22 <br /> 39 <br />SILTY SAND (SM) brown (10YR5/3), fine-grained sand, dense, wet, no <br />odor (0,50,35,15) <br />MW5 <br />@25' <br />MW5 <br />@30' <br />MW5 <br />@35' <br />MW5 <br />@40' <br />MW5 <br />@45' <br />CLAYEY SILT (ML) brown (I 0YR5/3), medium plasticity, stiff, wet, no <br />odor (0,5,50,45) <br />CLAYEY SAND (SC) brown (10YR5/3), fine-to medium-grained sand, <br />medium plasticity, dense, wet, no odor (0,55,5,40) <br />CLAYEY SAND (SC) brown (10YR413), medium-grained sand, dense, <br />wet, no odor (0,85,0,15) <br />- <br />CLAYEY SILTY SAND (SM) brown (10YR4/3), fine-grained sand, <br />medium dense, wet, no odor (0,45,25,30) <br />' <br />The substrata descnpnons 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 matenals and the change from <br />one predominant material type to another could be different than indicated P ' • ions on this log apply only at the specific location <br />at the time of drilling and may not be representative of subsurface con. .t. , : 't I • Ortfi. : tions or times <br />Project No 77C11 43578 00 0203 Date REVISED 6/13/02 PR <br />8632MW5 GP.) <br />LOG OF BOREHOLE <br />Log of Well <br />Figure <br />(sheet 2 of 2)