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Conestoga-Rovers & Associates BORING/WELL LOG 19449 Riverside Drive, Suite 230 Sonoma, CA 95476 Telephone: 707-935-4850 Fax: 707-935-6649 CLIENT NAME Shell Oil Products US BORING/WELL NAME MW-13B JOB/SITE NAME Former Shell Pipeline DRILLING STARTED 27-Jul-11 LOCATION Cordes Ranch, Tracy, California DRILLING COMPLETED 29-Jul-11 PROJECT NUMBER 060223 WELL DEVELOPMENT DATE (YIELD) NA DRILLER Cascade Drilling Co. GROUND SURFACE ELEVATION 120.64 it above msl DRILLING METHOD Roto-sonic vibration TOP OF CASING ELEVATION 122.93 it above msl BORING DIAMETER 6" SCREENED INTERVAL 110 to 125 fbq LOGGED BY B. Siegfried DEPTH TO WATER (First Encountered) 40.0 ft (29-Jul-11 ) Q REVIEWED BY J. Gaarder DEPTH TO WATER (Static) NA 1 REMARKS F U F m E O a F a 0 ai a 0 SOIL DESCRIPTION z = LL DIAGRAM CL mo ¢ W o �" OW V UO No soil logged from 0 to 8 feet. 5 - - - - - - - - - - - - - - - - - - - - - - - - - - 8.0 Silty SAND ISM) ; dark yellowish brown (10YR 4/6); sM moist; 5% clay, 30% silt) 65% fine sand. 10 10.0 SAND with Silt (SP-SM) ; brownish yellow (1 OYR 6/6); moist; 10% silt, 90% medium sand. SP-SM 15 15.0 ML SILT fML1 ; brownish yellow (10YR 6/6); moist; 20% clay, 80% silt. 16.5 SM Silty SAND ISM) ; brownish yellow (10YR 6/6); moist; 17.5 30% silt 70% fine sand. ------------ Sandy SILT (ML ; brownish yellow (10YR 6/6); moist; 'a ML 5% clay, 30% silt, 65% fine sand. 20 20.5 SAND with Silt (SP-SM) ; light olive brown (2.5Y 5/4); i moist; 10% silt, 90% medium sand. � SP-SM 25 25.0 ' . : SAND with Silt and Gravel (SP-SM) ; yellowish brown sSP-SM (10YR 6/6); moist; 10% silt, 60% medium sand, 30% fine sand. 27.5 SILT ML ; dark yellowish brown (10YR 4/4); moist; 20% N clay, 70% silt, 10% fine sand. O 30 o ML @ 34' - yellowish brown (10YR 5/4); 25% clay, 75% silt. 35 Continued Next Page PAGE f OF 4