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7 <br /> i <br /> SOIL BORINGIWELL CONSTRUCTION G Boring No. MW-3R Sheet: I of 2 <br /> Client Arco 2186 Date Aril 22,2009 <br /> 'dress 3212 N.California Street Drilling Co. Woodward Drilling rig type: SK-81 <br /> Stockton,CA Driller Amador Arroyo <br /> Project No. E2186-01 Method Hollow Stem Auger Hole Diameter; 8 inches <br /> f Logged 13y: Allan Dudding Sampler: 2 in.split spoon <br /> Well Pack sand: 36 ft.to 58 ft. Well Construction Casing Materiat: Schedule 40 PVC Screen Interval: _38 to 58 ft. <br /> bent.: 34 It to 36 ft. Casing Diameter;2 in. Screen Slot Size: 0-020-in. <br /> grout: 0 ft.to 34 ft. Depth to GW: Qfrst encountered:50 feet bgs -Static: <br /> Sample glow Sam to Wall Depth Lithoiogic FID <br /> Type No. Count Time F1.0 V--. Details Scale Column Descriptions of Materials and Conditions PPM <br /> :ZG} Asphalt pavement at surface;borehole Geared to 6.5 feet bgs using airknife- <br /> ---------------------------------------------------------------------- --- <br /> 2 Boring not lagged until 30 feet bgs due to proximity to boring MW-3- <br /> E ______________________ ________________ _ — .----------------------________________________________________________ <br /> -________ _ - •r, 23 ______________—_____ ____ <br /> 24 <br /> 25 <br /> ______ ___________________»_ ________________ •,fie_ .. — ____________________.________.___-_________________________._________________________________________ ________ <br /> Ar. <br /> 26 <br /> 27 <br /> �28 <br /> 29 <br /> --------------------------------------------------- <br /> 30 <br /> 12 1020 20% SM Silty Sand,SM,brown(10YR 4/3),damp,fine to medium grained,medium 0 <br /> 18-_ ;-; 31 dense. 85°/sand, 15%silt. <br /> ------- - <br /> ------ -------------- ---7 32 — — <br /> 7 s <br /> 19-- -1022 100% ! 33 <br /> 12 ;: 34 <br /> ----'- -------------- ----- -------- -------- <br /> 18 1027 100% <br /> 10 35 <br /> 10 00, <br /> S MW-3R-35 10 1030 100% 36 ML Silt,some clay,ML,dark yellowish brown(10YR 314),damp,low plasticity, 0 <br /> -------- - - - — <br /> ----------------- -------- <br /> 1 very stiff. 85%silt, 15%clay. <br /> 14 37 <br /> 1034 100% <br /> --------------------------------------------------------------------------------------- <br /> S <br /> _ 38 --at 38 feet bgs,same as above,little caliche and MnO3 staining. <br /> ------------- ------------------ ----------- <br /> 10 - —-- ----- <br /> =19 <br /> — 3s <br /> ------ -------------- _ <br /> ------—-----—------------------------------------------------- <br /> 7 - <br /> --------- -------- <br /> at 39.5 feet bgs,same as above,no staining. <br /> = 40 <br /> Comments:Calor descriptions based on Munsell Soil Color Chart. <br /> Recovery <br /> Sample <br /> ENVIR01`41VI1zNT"AL• INC. <br />