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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-16 <br /> JOB/SITE NAME Former Shell Pipelines-Mountain House,NBH B DRILLING STARTED 01-Sep-09 <br /> LOCATION Tracy,California DRILLING COMPLETED 09-Sep-09 <br /> PROJECT NUMBER 060222 WELL DEVELOPMENT DATE(YIELD) 25-Sep-09(30.0 gallons) <br /> DRILLER Gregg Drilling GROUND SURFACE ELEVATION 103.19 ft above msl <br /> DRILLING METHOD Hollow-stem auger TOP OF CASING ELEVATION 105.00 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(09-Sep-09) <br /> REVIEWED BY J.Gaarder DEPTH TO WATER(Static) 27.83 ft(30-Sep-09) 1 <br /> REMARKS Air Knifed to 2.5 fbq;Water Knifed to 5 fbq.Above ground construction consisting of a 2 ft.Stovepipe. <br /> U) F U ~ <br /> 8 O Z a W CL Q O SOIL DESCRIPTION Z? WELL DIAGRAM <br /> a °°O ¢ W O 0 OW <br /> U o <br /> SILT(ML);brown(10YR 4/3);dry; 15%clay,80%silt, Completed with <br /> 5%fine sand; low plasticity;block structure;compact; 2'tall stovepipe. <br /> grassy surface with cracks up to 2 cm in diameter. <br /> @1'-20%clay,75%silt,5%fine sand;low to medium <br /> ML plasticity. <br /> 0.0 114 5 @5'-yellowish brown(10YR 5/4); hard; 100%silt. <br /> 16 <br /> _ 7.5 <br /> SAND(SP);yellowish brown(10YR 5/4);dry;medium <br /> dense;5%silt,95%fine to medium sand. <br /> 0.0 1510 SP Portland Type II <br /> 12.0 <br /> 0 <br /> 0 <br /> 0.0 12 @14'-SILT(ML);brown(10YR 5/3);dry;hard; 10% <br /> F 14 15 clay,90%silt;low plasticity. <br /> 0 <br /> c? <br /> J <br /> D ML <br /> LL <br /> W <br /> O <br /> Q- 0.0 ;6 @19'-moist. <br /> M 16 20 Bentonite Seal <br /> Z: <br /> z <br /> N Silty SAND(SM);brown(16YR 4/3);moist;30%silt, ___ 22 0 MJ12 rey Sand <br /> o SM 70%fine to medium sand. 24.0 <br /> 0 0.0 ;; SILT;brown(10YR 5/3);moist; 10%clay,90%silt;low <br /> 16 25 plasticity. <br /> i <br /> N <br /> o - <br /> 0 8 <br /> 0 0.0 10, 30 @29'-moist to wet. <br /> 6 ML 2"-diam.,0.020" <br /> Slotted Schedule <br /> X 40 PVC <br /> U <br /> (D <br /> W <br /> = 10 <br /> F 0.0 16 @34'-Sandy SILT(ML);moist to wet; hard;5%clay, <br /> 0 35 65%silt,30%fine to medium sand;low plasticity. <br /> z <br /> 0 <br /> 0.0 13 @37'-SILT(ML);moist;hard; 10%clay,90%silt;low 38.0 <br /> 16 lastici <br /> a <br /> 0Bottom of <br /> 40 <br /> Boring @ 38 ft <br /> PAGE 1 OF 1 <br />