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Project No 77CH 43578 00 0203 Date REVISED 6/13/02 PR
<br />8632MW5 GPJ
<br />LOG OF BOREHOLE
<br />&Yscoii
<br />144 GABLE cr No 636
<br />Exp
<br />SECOR
<br />Internatronal Incorporated
<br />Logged By
<br />EG
<br />Date Drilled
<br />2/13/02
<br />DnIling 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 />testinR methods
<br />Boring
<br />Diam (in)
<br />8
<br />Surface
<br />Elev (ft )
<br />26 98 TOC
<br />Groundwater Depth (ft)
<br />3Z 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) Sample Recovery Blows/6" Description @ a.
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<br />4
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<br />c
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<br />.7.---- _
<br />-.= — ^ _
<br />.__,.
<br />0—
<br />= — -_---
<br />'--.'
<br />.
<br />BENTONITE
<br />SEAL
<br />SAND
<br />:0020"
<br />1
<br />-
<br />--1
<br />_
<br />15
<br />16
<br />20
<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 />30
<br />35
<br />40
<br />45
<br />,,,/:/
<br />--
<br />I
<br />_
<br />-
<br />-
<br />-
<br />- -
<br />-
<br />_
<br />-
<br />_
<br />-
<br />_
<br />4
<br />7
<br />19
<br />20
<br />22
<br />50
<br />23
<br />50/3"
<br />19
<br />22
<br /> 39
<br />CLAYEY SILT (ML) brown (10YR5/3), 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 (10YR4/3), medium-grained sand, dense,
<br />wet, no odor (0,85,0,15)
<br />SLOIILD
<br />SCREEN
<br />THREADED
<br />END CAP
<br />- -
<br />CLAYEY SILTY SAND (SM) brown (10YR4/3), fine-grained sand,
<br />medium dense, wet, no odor (0,45,25,30)
<br />- The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings ancUor
<br />samples obtained dunng drilling Predominant material 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 lions on this log apply only at the specific location
<br />at the time of drilling and may not be representative of subsurface con thilF Uons or times
<br />Log of Well
<br />Figure
<br />(sheet 2 of 2)
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