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SOIL BORING LOG Boring No B-40 Sheet 2 of 8 <br /> Client Arco Station 6100 Date 211912004 <br /> Address 25775 Patterson Pass Road Drilling Company Gregg Drilling rig type Mobile Drill B-80 <br /> Tracy,CA _ Driller Chns <br /> Project No U6100 Method Mud Rotary hole diam 5" <br /> Logged By Scott Blttinger <br /> Sam Io Slow sample Well Depth Descriptions of Materials PID <br /> Construc LrrHO <br /> Type I No Count Time Recov It Scale COLUMN and Conditions PPM <br /> __-_-____ __________ igt greyis _ <br /> ------------ -------------------- —2 t ML CLAYEY SILT brownish Gray-------------------------------- 20_225fhhbrown 22 5'-26'---- ---------- -------- <br /> _ orange iron oxide staining dry very stiff <br /> 2 z <br /> 2 3 <br /> 2 4 <br /> 5 640-25 954 2 5 0 <br /> 2 6 <br /> _ ML SANDY SILT 26'-27 5' alive gray 70-80%silt 20-30%fine to medium <br /> 2 7 Brained sand trace clay_dry--- <br /> 2 8 <br /> ------ ---96-- -- -- ------------`- — --------"- - ---------------- ----- ------ ---------- <br /> 10 - <br /> S 10 03 _ SW-SP SAND 27 5-29' dark gray,85-90%fine grained sand 5-10%medium 0 <br /> _--- 2 9 Brained sand <5%coarse grained sand and fine gravel,damp dense <br /> ------------------------------------------------ — ----------------- ------------------ -------- <br /> ------------------- ---- --------------------- -- 3 o ML CLAYEY SILT 29'-32 It ht olive gray, 1_3 %o fine grained sand,dry very ---- <br /> ------------------------------ ---------------------------------------- <br /> _ stiff -------- <br /> 3 1 <br /> 3 2 <br /> _ CL SILTY CLAY,light gray dry stiff <br /> 3 3 <br /> _ ML 51LT,grayish brown with yellow staining trace clay,dry,very stiff 9 <br /> S___- B40-34--. 10 19 3 4 M SILTY SAND 33 2-34 light olive brown,70%fine grained sand 30% <br /> -------------------------- ---- -------------------------------- -------- <br /> — fines moist dense <br /> _____ 3 5 <br /> ---------- ------------------------------ ----------------------------- 6----­ed" ------------e-----` -ML SILT light olive brown <5%fine grained sand dry very stiff <br /> 3 6 <br /> 3 7 <br /> _ ML SILT,light olive brown caliche present from 38-39 trace yellow staining <br /> -------- 3 a dry very_stiff- -- -------------------------------------------------------------------- -------- <br /> 3 9 <br /> S B40-40 10321 4 p 40 <br /> Comments <br />