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SOIL BORING LOG Boring No B-40 Sheet 4 of 8 <br /> Client Arco Station 6100 Date 2/19/2004 <br /> Address 25775 Patterson Pass Road Drilling Company Gregg Drilling rig type Mobile Drill B-80 <br /> Tracy CA Driller Chris <br /> *r0j'ct No U6100 Method Mud Rota hole diam 5 <br /> La ed B Scott Bittin er <br /> Sample Blow Sample Well Depth Descriptions of Materials PID <br /> Construc LITHO <br /> Type No Count Time Recov t Scale COLUMN and Conditions PPM <br /> 6 1 <br /> — ML SILT 61'-64' grayish brawn,trace caliche dry hard <br /> --------- -- s z <br /> 6 3 <br /> -------- -------------------------------- <br /> 6 4 <br /> - ------------------------------------------------------------------- <br /> - ML SILT grayish brown with strong yellow staining dry very hard <br /> 6 5 <br /> 6 6 <br /> 6 7 <br /> CL/CH SANDY CLAY 66 5'-68',Ilght gray 75%clay,25%fine g-r-a-T n--e-W sand <br /> 5 B40-68 11 45 6 8 medium plasticity wet very soft 196 <br /> -- - - - '----------------- — --- -p-----------------------------_----------------------------------- -- ---------------------- <br /> ---------- - - <br /> _ CL SILTY CLAY 68-68 5 light brownish gray with white caliche moist stiff <br /> 6 9 <br /> no recovery 68 5'-71' <br /> ----------------------------------------------------- 7 4 <br /> 7 f <br /> B40-72 1158 ________ 7 2 ML SILT 71'-79__grayish-brown with white caliche increase fellow staining <br /> _ 73'-75' dry very stiff to hard <br /> 7 3 <br /> 7 4 <br /> 7 5 <br /> 7 6 <br /> 7 7 <br /> S 640-78 12 10 7 8 <br /> 7 9 <br /> ML SILT 79'-81 olive brown trace white caliche,dry,hard <br /> eo <br /> Comments <br />