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Conestoga-Rovers&Associates�` BORING/WELL LO G 19449 Riverside Drive, Suite 230 Sonoma, CA 95476 Telephone: 707-935-4850 (2i�y Fax: 707-935-6649 CLIENT NAME Shell Oil Products US BORING/WELL NAME MW-3 JOB/SITE NAME Former Shell Pipelines-Mountain House,NBH B DRILLING STARTED 04-Sep-09 LOCATION Tracy,California DRILLING COMPLETED 14-Sea-09 PROJECT NUMBER 060222 WELL DEVELOPMENT DATE(YIELD) 24-Sep-09(25.0 gallons) DRILLER Gregg Drilling GROUND SURFACE ELEVATION 116.68 ft above msl DRILLING METHOD Hollow-stem auger TOP OF CASING ELEVATION 118.79 ft above msl BORING DIAMETER 8" SCREENED INTERVAL 23 to 38 fbq LOGGED BY C.Rodriguez DEPTH TO WATER(First Encountered) 28.0 ft(14-Sep-09) REVIEWED BY J.Gaarder DEPTH TO WATER(Static) 30.75 ft(30-Sep-09) 1 REMARKS Air knifed to 1 fbq;water knifed to 5 fbq. Above qround construction consisting of a 2 ft.Stovepipe U) a a Q O SOIL DESCRIPTION = WELL DIAGRAM o ppp x o W� za a 0 < w � C) o w 0 SILT(ML);(fill);brown(10YR 4/3);dry;20%clay,70% Completed with silt, 10%fine-grained sand;low plasticity;grassy surface a 2'tall with cracks up to 1.5"-diameter;silt is very compacted with stovepipe. prismatic structure. 0.4 1z MW-3-5 5 @ 5'-(fill) very dark grayish brown(2.5Y 3/2);dry;20% e clay,70%silt, 10%fine-grained sand;low plasticity; 17 blocky structure. 79ML 0.3 e s 4 10 Portland Type II 0.0 a MW-3-10 @ 10'-dark yellowish brown(10YR 3/4). o @ 105-SILT with sand(ML);dark yellowish brown 1 (10YR 3/4);dry;5%clay,80%silt, 15%fine to 13 medium-grained sand;low plasticity;block structure; 0.0 1z 9 P tY� Y 13 trace fine gravel. 14 0.0 12 MW -3-15 15 t7 16.3 12 SM Silty SAND(SM);light olive brown(2.5Y 5/4);dry;5% 17.0 17 19 ML clay,30%silt 65%fine to medium- rained sand. 18.0 0 0.0 1< SW :°:• Sandy SILT(ML;light olive brown(2.5Y 5/4);dry;5% 19.0 15 SP-SM clay,55%silt,40%fine-grained sand; low plasticity; 19.7 IS 0.0 19 MW-3-20 20 1 block structure. Bentonite Seal 22A ND with gravel(SW);olive brown(2.5Y 4/3);dry;5% I W 10;64 il70%fine to coarse-grained sand,25%fine gravel; I Monterey sand a0.0 s ML unded and subrounded ravel u to 1.5"diameter. ( #2112 15 1 SAND with silt and gravel(SP-SM);light olive brown m 16 25 I(2.5Y 5/4);moist; 10%silt,65%fine to medium grained I z 0,0 79 MW-3-25 Isand`25%fiine�ravel._ _ _ _I 26.0 8 % o SM Sandy SILT(ML);light olive brown(2.5Y 5/4);dry; 10 0 1° clay,50%silt,40%fine-grained sand;low plasticity. 28.0 o e SILT(ML);light olive brown(2.5Y 5/4);moist;20%clay, 28.5 1z 70%silt, 10%fine-grained sand;low plasticity;buttery texture;caliche veins. w 0,0 s1 MW-3-30 30 2 diam.,o.ozo 0 „ SILT with sand(ML);dark yellowish brown(10YR 4/4); - Slotted Schedule 81 ML dry; 15%clay,60%silt,25%fine-grained gravel; low 40 PVC N 10 lastici . o s Silty SAND(SM):olive brown(2.5Y 4/4);moist;30%silt, i1 35 70%fine-grained sand. 35.5 0.0 g MW 3-36 SM SAND with silt SPSM;olive brown(2.5Y 4/4);moist to - 's' et 10%silt 90%fine to medium-grained sand. 36.5 7J 9ML SILT(ML);olive brown(2.5Y 4/4);moist;20%clay,70% 38.0 a 12 silt, 10%fine-grained sand;medium plasticity. SILT with sand(ML);yellowish brown(10YR 5/4);moist W 40 to wet; 15%clay,70%silt, 15%fine-grained sand;low Bottom of plasticity. Boring @ 38 ft @ 31'-wet;20%clay,55%silt,25%fine-grained sand; medium plasticity. z @ 33'-wet;25%clay,55%silt,20%fine-grained sand; 0 edium plasticity. _ 45 Silty SAND SM•yellowish brown(10YR 5/4);wet; 10% o iplay,20%silt 70%fine to medium-grained sand. a ISandy SILT(ML);yellowish brown(10YR 5/4); 10%clay, 0 0%silt 40%fine-grained sand;medium lasticit . 0 J J 50 PAGE 1 OF 1