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Combrio Environmental Technology, Inc BORING/WELL LOG <br /> 1144 - 65th St <br /> Ookland, CA 94608 <br /> Telephone (510) 420-0700 <br /> Fax (510) 420-9170 <br /> OLIENT NAME _BP Oil Company BORING/WELL NAME CB-6 <br /> JOB/SITE NAME BP-11193 DRILLING STARTED 08-Oct-99 <br /> LOCATION 3202 West Hammer Lane,Stockton California DRILLING 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 Riggi DEPTH TO WATER(First Encountered) 13 5 ft(08-Oct-99 <br /> REVIEWED BY_ K Rahman. RG DEPTH TO WATER(Static) 13 5 tt(08-Oct-99) 1 <br /> REMARKS Hand au eyed to 5'b s boring is located 6 5'East of lamer 51'South of W Hammer back of sidewalk <br /> C <br /> �+crn p U U ao <br /> Lu zc <br /> E O Z a Lu ¢O LITHOLOGIC DESCRIPTION z WELL DIAGRAM <br /> a 000 a �" c¢7� O� <br /> 0 c V W <br /> O <br /> _APOLAU 05 <br /> SP SAND,(SP),brown,dry to damp, 10%silt,90% <br /> medium grained sand,very high estimated permeability 20 <br /> Sandy Silty CLAY,(CL),grey to black,damp,45%clay, <br /> 30%silt,25%sand,medium plasticity very low estimated <br /> CL permeability <br /> 50 <br /> CB-6 ® 5 ClaM SAND,(SC), mottled red to brown,damp,30% <br /> 5' clay, 10%silt,60%fine-medium grained sand, low <br /> plasticity,low estimated permeability <br /> SC <br /> to— <br /> C13-6 @ 10 5'-mottled brown to grey,35%clay, 10%silt,55% <br /> 105, fine to medium grained sand,low plasticity,low estimated <br /> permeability,clay nodules in sand <br /> 130 <br /> c0 050 C13-6 0 fiUty_§A 2,(SM),brown,wet,20%silt,80%fine 1 <br /> grained sand,no plasticity,very high estimated <br /> 135, permeability <br /> 15 Portland Type <br /> l/lI <br /> CB-6 0 - Hydropunch groundwater sample collected from 16-17 ft <br /> 16-17' — bgs <br /> a C13-6 0 20 @ 20'-brown,wet, 10%clay,20%silt,70%fine grained <br /> 0 20' sand,no plasticity, high estimated permeability, pyrite <br /> SM flecks <br /> LL <br /> LULU <br /> l7 <br /> a <br /> C136 @ 25 <br /> B <br /> F 25 <br /> z <br /> L2 <br /> n <br /> rn <br /> CB-6 0 <br /> 28 5' = Hydropunch groundwater sample collected from 29-30 It <br /> E; 30 As— — — — — — — — — — — — — i 300 Bottom of <br /> Boring @ 30 It <br /> 0 <br /> ca <br /> J <br /> J <br /> J <br /> W? <br /> } <br /> PAGE i OF } <br />