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;. Conestoga-Rovers&Associates BORING/WELL LOG <br /> 19449 Riverside Drive, Suite 230 <br /> r Sonoma, CA 95476 <br /> Telephone: 707-935-4850 <br /> Fax: 707-935-6649 <br /> CLIENT NAME Shell Oil Products US BORING/WELL NAME MW-4 <br /> JOB/SITE NAME Former Shell Pipelines-Mountain House,NBH B DRILLING STARTED 04-Sep-09 <br /> LOCATION Tracy,California DRILLING COMPLETED 11-Sep-09 <br /> PROJECT NUMBER 060222 WELL DEVELOPMENT DATE(YIELD) 25-Sep-09(30.0 gallons) <br /> DRILLER Gregg Drilling GROUND SURFACE ELEVATION 112.15 ft above msl <br /> DRILLING METHOD Hollow-stem auger TOP OF CASING ELEVATION 113.72 ft above msl <br /> BORING DIAMETER 8" SCREENED INTERVAL 23 to 38 fbq <br /> LOGGED BY C.Rodriguez DEPTH TO WATER(First Encountered) 28.0 ft(11-Sep-09) <br /> REVIEWED BY J.Gaarder DEPTH TO WATER(Static) 28.83 ft(30-Sep-09) 1 <br /> REMARKS Air Knifed to 5 fbq. Above ground construction consisting of a 2 ft.Stovepipe. <br /> U U R <br /> CL 0O Z a s ¢p SOIL DESCRIPTION z= WELL DIAGRAM <br /> Q oD0 Q w 0 UJ UW <br /> U U 0 <br /> SILT with sand(ML);brown(10YR 4/3);dry; 10%clay, Completed with <br /> 75%silt,15%fine-grained sand;low plasticity;dirt surface 2'tall stovepipe. <br /> ML with weeds and shrubs. <br /> 5.0 <br /> 0.0 s 5 SAND(SP);light brownish gray(10YR 6/2);dry;5%silt, <br /> 9 95%fine-grained sand;high permeability. <br /> SP <br /> 0.0 16 @ 8.5'-dry; 100%fine-grained sand;high permeability. <br /> 510— <br /> Portland Type II <br /> 11.5 <br /> Sandy SILT(ML). <br /> z @ 13.5'-light brownish gray(10YR 6/2);dry;5%clay, <br /> a 16 15 65%silt,30%fine-grained sand;medium plasticity. <br /> F- ML <br /> 0 <br /> J <br /> 0.0 17 SILT(ML); light brownish gray(10YR 6/2);dry to moist; <br /> 0 1620 5%clay,85%silt, 10%fine-grained sand;low Bentonite Seal <br /> permeability. <br /> a --- -------------------------- 21.5 <br /> SAND(SP). Monterey Sand <br /> _ #2112 <br /> z <br /> 0.0 za @ 23.5'-grayish brown(10YR 5/2);dry; 100%fine to <br /> 0 31 25 SP medium sand;high permeability. <br /> 0 <br /> 0 <br /> 0.0 1LLI <br /> 5 @ 28.5'-brown(10YR 4/3);wet;5%silt,95%fine to 1 29.0 <br /> ,s 30 medium rained sand. <br /> o ML SILT with sand(ML);brown(10YR 4/3);wet;5%clay, 2"-diam.,0.020^ <br /> 80%silt 15%fine- rained sand. 31.5 Slotted Schedule <br /> o Silty SAND(SM). 40 PVC <br /> it 0.0 9 SM @ 33.5'-dark grayish brown(10YR 4/2);wet;20%silt, <br /> 13 35 80%fine-grained sand;high permeability. <br /> @ <br /> 34'-25%silt,75%fine-grained sand. <br /> Lu <br /> 0.0 s 37.0 <br /> a ML SILT(ML);brown(10YR 5/3);moist to wet;20%clay, 38.0 <br /> < 80%silt low to medium lastici • low ermeabili <br /> 0 <br /> 0 40 Bottom of <br /> _ Boring @ 38 ft <br /> 0 <br /> a <br /> C7 <br /> O <br /> J <br /> J <br /> J <br /> 45 <br /> PAGE 1 OF 1 <br />