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Cambria Environmental Technology, Inc BORING/WELL LOG
<br /> ~ 1144 - 65th St
<br /> Oakland, CA 94608
<br /> Telephone (510) 420-0700
<br /> Fax (510) 420-9170
<br /> LI ENT NAME BP Oil Company BORING/WELL NAME CB-4
<br /> JOB/SITE NAME BP-11193 DRILLING STARTED 08-Oct-99
<br /> LOCATION 3202 West Hammer Lane, Stockton, CaliforniaDRILLING COMPLETED 08-Oct-99
<br /> PROJECT NUMBER 852-1530 WELL DEVELOPMENT DATE(YIELD) NA
<br /> DRILLER Precision Sampling C-57 636387 GROUND SURFACE ELEVATION NA
<br /> DRILLING METHOD CPT TOP OF CASING ELEVATION NA
<br /> BORING DIAMETER 1 75" SCREENED INTERVAL NA
<br /> LOGGED BY _ J Riggs _ DEPTH TO WATER(First Encountered) 13 5 ft(08-Oct-99)
<br /> REVIEWED BY K Rahman RG DEPTH TO WATER(Static) 13 5 f1 08-Oct-99 1
<br /> REMARKS Hand augered to 5'bas ,boring is located 64'West of Kelly Dr 12'South of W Hammer,CB-4E is 3'North of CB-4
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<br /> Q a w w ¢O LITHOLOGIC DESCRIPTION = WELL DIAGRAM
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<br /> P L 05
<br /> SP SAND,(SP),brown,dry, 10%silt,90%medium grained
<br /> sand,no plasticity,very high estimated permeability_ _ _ 20
<br /> Silty Sandy CLAY,(CL),grey,dry to damp,45%clay,
<br /> 40%silt, 15%sand,medium plasticity,very low estimated
<br /> CL permeability
<br /> 50
<br /> <0 05 CB-4 @ 5 Clayey SAND,(SC),mottled yellow to brown,damp,
<br /> 5' 20%clay, 10%silt,70%fine to medium grained sand,no
<br /> plasticity,medium estimated permeability
<br /> SC
<br /> 10 _ _ _ _ _ _ _ _ _ _ _ _ _ _ 105
<br /> CB-4 @ SAND,(SP),brown,damp,5%clay, 10%silt,85%fine
<br /> 105, SP grained sand no plasticity,very high estimated
<br /> permeability
<br /> 130
<br /> 074 CB-4 @ Silty SAND,(SM),brown,wet, 10%clay,40%silt,50% 135
<br /> 13 5' fine grained sand,no plasticity,high estimated
<br /> ermeabdi
<br /> 15 SAND,(SP),brown,wet, 10%silt,90%medium grained Portland Type
<br /> CB-4 @
<br /> sand,no plasticity,very high estimated permeability I/ll
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<br /> 16-17'
<br /> Hydropunch groundwater sample collected from 16-17 ft
<br /> bgs
<br /> o CB-4 0 20 @ 20'-fine grained sand
<br /> c� 20'
<br /> a SP
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<br /> CB-4 ® 25
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<br /> CB-4 0
<br /> ~ CB-4 @ - Hydropunch sample collected from 29-30 ft bgs
<br /> 300
<br /> 29-30' 30 — — — — ___ — — — — — — — — — — — Bottom of
<br /> Boring 30 ft
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