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SOIL BORINGMELL CONSTRUCTION LOG Boring No. MW-8 Sheet: 5 of 6 <br /> Client Arco 443 Date December2,2008 completed February 11 2009 <br /> Address 2478 East Oak Street Drilling Co. Woodward Drilling rip type: BK-81 <br /> Stockton,CA Driller Dave Van Steyn <br /> Project No. E443-01 Method Hollow Stem Auger Hole Diameter 18/10 Inches <br /> Logged By: Allan Dudding Scott Bittinger Sampler 18 or 24 inch long x 2 Inch diameter split spoon <br /> Well Pack sand: 97 ft.to 117 ft. Well Construction Casing Material: Schedule 40 PVC Screen Interval: 103 to 113 ft <br /> bent.: 92 ft.to 97 ft. Casing Diameter:2 in. Screen Slot Size: 0.020-in. <br /> grout: 0 ft.to 92 ft. Depth to GW: Vfirst encountered:55 feet bas -Static. <br /> Sam le Blow Sam le <br /> Well DepScale Column PID <br /> Type No. 50/3" Time a10% beWlls Scale Column Descd one of Materials and Conditions PPM <br /> 50/3" 1051 10% : $W Well-sorted Sand with silt and gravel,SW,dark olive gray(5Y 3/2),fine to n/a <br /> ._____-_---- ---------------- ----------------- 81 coarse grained,wet,very dense. 85%sand,10%silt,5%fine to coarse <br /> ,. ____.._._________-_______--.____-_._____________________________----------------- <br /> - grovel. ___-------- <br /> ----------------- <br /> ._..___ <br /> _________________ _-_____ -._____-- —82 <br /> .___------- --------- -_--._--------- —83 <br /> .__-_ --------__.___.____ ______ --- ______ —84 <br /> -------------.-------------------____._-_---------------------------_-----_---------_..--------.------- <br /> ----------------- --- _._.___ " ' 85 <br /> 14 As above,with 25%fine to coarse grained gravel,up to 1.5"diameter <br /> S MW-8-85 50/5" 1109 100% 88 <br /> ---- _____________ ____________ <br /> ___________________ _______ ______.__..__ _87 <br /> ______------------ ________________-------- —88 <br /> 89 <br /> ______________-----------_ _._____.._____ —90 <br /> 12 -----___.______-_.___.-.___.__-_______.___ -------------- <br /> 12 ----_--- y, 91 Well-graded Sand,some silt,SW,dark yellowish brown(10YR 4/4),fine to0 <br /> ___________________ _______ _______ __.__-__.______--.....___ _ <br /> S MW-8-91 12 1115 100% coarse grained,wet,medium tlense. 80 k send,20%silt.� - - ---------------------- <br /> _______________ ______ ----_---________ —92 <br /> Driller rioter chan a in drilliri conditions at a---------m-a-------— -'� 9 9 pproximately 92 feet hgs, - � i <br /> ___- ____ ________________ - —93becomes more diHlcub. <br /> ___________ _______ _______________ —94 <br /> ______------------ --____. -___.____._-___. 95 <br /> 14 ___._______________________________________________________.___...._.._--.-___- <br /> CL Clay with silt,CL,dark yellowish brown(tOYR 4I6),medium plasticity, - --r,ja- ' <br /> S MW-8-E6 50/5" 1219 100% 96 moist_hard- 75--%cla_25%silt---------_------------------------_----_-_------_-,--------- <br /> -------- <br /> _____ -----------_--------_------.---------- i 97 <br /> 98 <br /> i -------- <br /> -Be <br /> 100 <br /> Inner Wall of 18"HSA string <br /> Steel Conductor Casing Comments:Well boring first drilled with 10"augers to 95 feet bgs,sampled to 96 feet <br /> Well Casing bgs.Well boring then drilled with 18"augers to 95 feet bgs;a 10 5/8"ID <br /> Recovery flush-threaded steel conductor casing was Inserted inside the augers. <br /> Sample .While grouting the conductor Into place,the drill rig broke down and(cont) <br /> 14AL G o <br /> �N ENVIRONMENTAL, INC- <br /> 0- <br /> NCQ phen J.Carter <br /> -9 RIO. 5577 <br /> tP., <br /> �TFQFC AUF�P <br />