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Conestoga-Rovers&Associates BORING/WELL LOG <br /> 19449 Riverside Drive, Suite 230 <br /> Sonoma, CA 95476 <br /> Telephone: 707-935-4850 <br /> Fax: 707-935-6649 <br /> CLIENT NAME Shell Oil Products US BORING/WELL NAME MW-12 <br /> JOB/SITE NAME Former Shell Pipelines-Mountain House, NBH C&D DRILLING STARTED 20-Jan-09 <br /> LOCATION Tracy,CA DRILLING COMPLETED 21-Apr-09 <br /> PROJECT NUMBER 060222 WELL DEVELOPMENT DATE(YIELD) 21-Sep-09(38.0 gallons) <br /> DRILLER Gregg Drilling,C-57#485165 GROUND SURFACE ELEVATION 93.01 ft above msl <br /> DRILLING METHOD Hollow-stem auger TOP OF CASING ELEVATION 95.90 ft above msl <br /> BORING DIAMETER 8 SCREENED INTERVAL 23 to 38 fbq <br /> LOGGED BY S.Phillips DEPTH TO WATER(First Encountered) 28.0 ft(21-Apr-09) <br /> REVIEWED BY J.Gaarder DEPTH TO WATER(Static) 26.91 ft(30-Sep-09) 1 <br /> REMARKS Air knifed to 5 fbq. Above ground construction consisting of a 2 ft.Stovepipe. <br /> M 0O z a LU a� U ° O SOIL DESCRIPTION H z WELL DIAGRAM <br /> 0 opo (L X W� (n QJ ZH <br /> a U < W OUQ <br /> SILT(ML);dark greenish gray(10GY 3/1);dry;35% <br /> clay,55%silt, 10%fine to medium sand;medium <br /> ML plasticity. <br /> 5.0 <br /> ;; MW-12-5 5 SILT(ML);yellowish brown(10YR 5/6);dry; 10%clay, <br /> 74 55%silt,35%very fine sand;medium plasticity <br /> ML <br /> 10.0 Portland Type 1/11 <br /> 13 MW-12-10 10 SILT(ML);yellowish brown(10YR 5/6);dry;20%clay, <br /> 15 40%silt,35%very fine sand;medium plasticity <br /> ML <br /> 15.0 <br /> m is MW-12-15 15 SILT(ML)•yellowish brown(10YR 5/6);dry;20%clay, <br /> 15 40%silt,35%very fine sand;medium plasticity <br /> ML <br /> 0 <br /> 20.0 <br /> 11 20 Bentonite Seal <br /> LL 16 MW-12-zo Silty SAND(SM);yellowish brown(10YR 5/6); moist; <br /> LU " 35%silt,65%fine to medium sand. <br /> a' SM <br /> c? <br /> N 25.0 <br /> O 2 MW-12-25 25 Silty SAND(SM);yellowish brown(10YR 5/6); wet; <br /> 13 35%silt,65%fine to medium sand. <br /> 0 <br /> SW <br /> N 30 30.0 Monterey Sand <br /> o MW-12-30 SW SAND(SW);brown(10YR 4/3);wet; 100%fine to #2/12 <br /> o coarse sand. 31.2 2"diam.,Schedul <br /> o SILT(ML);brown(10YR 4/3);wet;20%silt,80%fine to 40 PVC <br /> o coarse sand. <br /> = ML <br /> v MW-12-35 35 <br /> 'w <br /> x <br /> a <br /> 38.0 <br /> 0 <br /> 0 <br /> 0 40 Bottom of <br /> Boring @ 38 ft <br /> 0 <br /> Ell <br /> cD <br /> 0 <br /> J <br /> J <br /> J <br /> 45 <br /> PAGE i OF 1 <br />