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SOIL BORINGWELL CONSTRUCTION LOG wing No. MW-1R Sheet: 3 of 3 f <br /> i <br /> Client Arco 2186 Date April 27,2009 _ <br /> f <br /> Address 3212 N.California Street Drilling Co. Woodward Drilling_ rig type: BK-81 <br /> Stockton,CA Driller Amador Arroyo <br /> Project No. E2186-01 Method Hollow Stem Auger Hole Diameter: 8 Inches <br /> Logged By: Allan Dudding Sampler: 2 inch diameter x IS inch long split spoon <br /> Well Pack sand: 36 ft.to 58 ft. Well Construction Casing Material: Schedule 40 PVC Screen Interval: 38 to 58 ft__ i <br /> bent.: 34 ft.to 36 ft. Casing Diameter:2 in. Screen Slot_Size: 0.020-in. ; <br /> grout: 0 ft.to 34 ft. Depth to GW: Qfirsl encountered:49.25 feet bgs -Static: <br /> s <br /> Sample at Unn a Wel Depth Llihalogle PFD <br /> 1 No. Count Time Reaov. Doll s Scale Column Descri ons of Materials and Conditions PPM <br /> 7 Silty Clay,CL,olive brown(2.5Y 413),medium plasticity,moist,very stiff. 0 ; <br /> _ 10 _ 41 CL 60%day,40%sill. <br /> S MW-1R-41 15 1340 60% — <br /> 42 <br /> -- — —49 - <br /> - —44 r <br /> _ = T45 <br /> 10 = <br /> 12 — 46 Same as above. _ <br /> S MWA R-46 1.5 1345 100°r6 = 0 <br /> — -- —10 = 47 _ --------- --- <br /> 12 — <br /> _ _13 i = [ 48 <br /> ML Clayey Silt,ML.dark yellowish brown(10YR 414),tow plasticity,moist to wet <br /> _-- 10 _ 49 at <br /> 49.25 feet bgs, tiff. 60%silt,40%day. _ <br /> 7 — very s <br /> -- —__ <br /> 10 _-- <br /> -- — 12 = 1 <br /> S MW-IR-51 20 1356 100% 51 —__--_ �_���__--_--_—__—_ ❑ <br /> _9 52 l <br /> — — 11 SM Silty Sand,SM,dark grayish brown(2.5Y 412),finegrained,wet,medium—� — <br /> 7 — 53 dense. 60%sand,40%silt. <br /> _—_ 1❑ _ = 54 ML Sand Sllt,ML,dark grayish brown(2.5Y 412).non-piestic,wet,very stiff. <br /> 7 60%silt,40%very fine sand. <br /> 12 — 55 <br /> - - - za <br /> 14 56 <br /> S MW-lit-56 5015" 1409 100% ' = SM Silty Sand,SM.dark grayish brown(2.5Y 412),fine grained,wet,very dense. ❑ <br /> 57 ~� 70%sand,30%sift,17 ~ML Sandy Silt,ML,dark grayish brown(2.SY 412),non-plastc,wet,hard. 60%— <br /> S MW-1R-58 5016" 1414 100% :; — 58 silt,40%fine sand. ----- 0 <br /> 59 <br /> 60 <br /> Comments: Borehole drilled and sampled to 58 feet bgs,with continuous sampling <br /> Recovery from 45 to 85 feet bgs using 2"x18"split spoon sampler:well set at 58 <br /> Sample feet bgs. <br /> ENVIRONMENTAL, INC. <br />