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SOIL BORING/WELL CONSTRUCTION LOG Boring No. MW-8 Sheet: 6 of 6 <br /> Client Arm 443 Date December 2 2008 wmpleted February 11 2009 <br /> Address 2478 East Oak Street Drilling Co. Woodward Drilling rig 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 Bitlinger 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: V first encountered:55 feet bgs -Static <br /> amp[ Blow Sample wan DePth LlOwlogic PID C <br /> Type No. Count Time 1aea. Details Scale Column Descriptions of Materials and Conditions PPM <br /> --- <br /> —101 0 <br /> is102 - --------------- --' <br /> _S_ _ _""_"" 50/5" 0843 - 2% — 103 CL Silly Clay,light olive brown_moist_stiff----------------------------------------_--_____-__ n/a <br /> - <br /> - 104 <br /> _105 ._..._.._"...""_.__..__"""-."_____________"-_"_"""__"""""""...----------------_--------------------------- <br /> S MW-8-105 50/5" 0855 30%" = i' 106 ML Clayey Silt,olive brown,2%very fine grained sand, to mold_very stiff. _ 0__ <br /> _ <br /> — 707 <br /> 17 :: _ 108 .__.._---______..__-._"._.______-__"_____"__"_._______-__._-___-_-..___________-__--_.___________.______ <br /> -------------------- --------------- <br /> 23 SC Clayey Sand,dark yellowish brown,55-65%very fine sand,35-45%clayey <br /> 30 ;i - 109 fines,wet,medium dense. <br /> S MW-8-109 32 0905 95% <br /> 0 <br /> 20 = <br /> _25__ __._-____.—____________.________.__-____-____..____.-._.__________._____________._._-_______._ <br /> S MW-8-111 30 0913 95% <br /> 36 = 112 ML Silt with clay,olive brown,tlry,very stiff,approximately 90%silt,10%clay. <br /> i <br /> 30 3 <br /> "32 At 113 teatClayey Solive brown,trace caliche,trace MnC2 staining, <br /> 5 MW-8-113 36 0925 60°� :�::: �:�7 114 dry,very sfiN,approximately 70%silt,30%clay. <br /> 38 <br /> ___________________ __ ..-____-_______ <br /> :;:;:;: 115 _________.________________________._______..______.._-_____________.___._ <br /> 38 __________---_.."__-__---------- <br /> '. <br /> .:.:.:.:.:. <br /> S MW-8-115 42 0939 35% �:.� : :: 116 Sandy Clay with silt,dark yellowish brown,approximately 50%clay,40%very <br /> 50/5" CL fine sand,10%silt,damp,stiff. <br /> .:.:.:.:.:. <br /> 117 <br /> 17g Ila sapproximately At 118 feet bgs,becomes olive brown,a roximalel 60%Ga 10%silt, <br /> ° <br /> Y. <br /> S MW-&11a20 0955 60% i%y3�•�� 30%fine sand. <br /> 50/5" L{3 ' 119 <br /> _ Slough from 11710119 feet bgs when well was set. , <br /> 20 <br /> Comments:85 feet of 18"augers had to be left in the borehole. Conductor was <br /> LO G ry grouted to the surface Inside the remaining augers.Well drilled to 120 <br /> feet bgs,sampled to 119 feet bgs using 8"augers on Feb.9,2009. <br /> •`� 'to Borehole reamed with mud-rotary to 119 feet bgs Feb.10,2009. Well <br /> ` Scott G.Bittinyer —A set at 113 feet bgs. <br /> Boring logged by Scott Biltinger from 100 to 120 feet bgs on February <br /> a M0.pan a 9,2009. <br /> 1ryA. E�RONMMEry c <br /> �,` <br /> y , <br />