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SOIL BORINGANELL CONSTRUCTION LOG Boring No. MW-1D Sheet: 4 of 5 <br /> Client Arco 2186 Date April 24 and 27 2009 _ <br /> Address 3212 N.California Street Drilling Co. Woodward Drilling rig <br /> e: BK-81 <br /> Stockton,CA Driller Amador Arra o <br /> Project No. E218"1 Method Hollow Stem Auger Hale Dlameter: 15 and 8 inches <br /> Logged By: Allan Dudding Sampler. 2"x 18"split spoon <br /> Well Pack sand: 68 ft.to 85 ft. Well Construction Casino Material: Schedule 40 PVC — Screen Interval: 70 to 65 ft. <br /> bent.: 65 ft.to 68 ft. Casing Dlameter.2 in. Screen Slot Size: 0.020-in. <br /> grout: 0 ft.to 65 ft._ Depth to GW: Qfirst encountered:50 feet bas -Static: <br /> samale Blew Sam a well Depth Lithologic PID <br /> T No. Count Time R..- Details Scale Column Descriptions of Materials and Conditions PPM <br /> 20 Silty Clay,CL,olive brown(2.5Y 413),medium plasticity,moist,hard. 70% 0 <br /> S mw-tD-61 5016" 1118 100% 81 CL Gay,30%slit.00 <br /> _ <br /> 00 <br /> 62 <br /> ;i <br /> _24_ 63 Same as above. <br /> S MW-1D-63 5015" 1126 100°A <br /> 64 <br /> —65 <br /> _ r <br /> r <br /> 66 <br /> r <br /> r <br /> —67 r <br /> 68 <br /> 22 _ r 69 SM Silty Sand,SM,dark yellowish brown(10YR 4/4),fine grained_moist,very 0 <br /> S MW-1 Die 5016" 0818 10D°k dense. 50%sand,50%slit. T <br /> 70 <br /> 20 <br /> ___ _ 71 SP Poorly-graded Sand with silt,SP,dark yellowish brown(10YR 414),fine to <br /> ~~ 40 — 100% = medium grained,moist then wet at 70.25 feet bgs,very dense. 90%sand, <br /> 28 = 72 10%silt. <br /> ----- 6013" --- 100% --- <br /> 73 <br /> _ 23 — 74 <br /> S MW-1D-74 43 0934 100% <br /> 10 — 75 r <br /> 12 = —at 75.5 feet bgs,becomes coarser(still fine ta-mediumgrained),with no ' <br /> 20 100% 76 slit content. <br /> — 16 — _ — 77 --at 76.5 feet bgs,becomes fine grained with 5%silt content. <br /> — - - — --22 ~ —�- <br /> 20 = 78 --at 78 feet bgs,no slit content. <br /> 34 <br /> S MW1 D•79 40 0958 100% — 79 —at 78.75 feet bgs,slit content increases to 10%. 0 <br /> 8 — 80 --at 79.75 feet bgs,as above but becomes medium to coarse grained. <br /> Steel Conductor Casing Comments:10-inch diameter,welded joint,steel conductor casing installed from <br /> Well Casing surface to 63 feet bgs inside 15anch diameter hollow-stem augers. <br /> Recovery <br /> Sample <br /> EN\ARONl1AENTAL_INC. <br /> i <br /> i <br /> i <br /> i <br /> I <br /> i <br /> I <br /> i <br />