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SOIL BORING LOG Boring No B-41 Sheet 1 of 7 <br /> hent Arco Station 6100 Date 4/1912004 <br /> Address 25775 Patterson Pass Road Drilling Company Gregg Drilling rig type Mobile Drill B-53 <br /> Tracy CA Driller Robert <br /> Protect No U6100 Method Mud Rotary, hole dram 5 <br /> Logged By Scott Brttln er <br /> Well Pack sand ft to ft Well Construction casing screen <br /> bent ft to ft casing diam screen slot <br /> grout ft to ft Depth to GW 17 ft Time/Date IV ft Time/Date <br /> Sam le Blow Sample well Depth Descriptions of Materials PID <br /> Constru LITHO <br /> Tvoe No Count Time Recon ct Scale COLUMN and Conditions PPM <br /> — 1 <br /> ----------------- ------------------- ------ — - ---- ---------------------------- ------------------------------------------------------------ <br /> 2 ML SILT dark olive gray_upper 2 disturbed from tilling dry <br /> 3 <br /> — <br /> ------- ------------------------- ----- —4 - ------------- -------- ------- ------- -------------------------------------------------- <br /> 5 SC CLAYEY SAND 4'-5 3 light olive gray with white caliche 70%fine <br /> ----- ----------- ---------------- — ---------- <br /> _ grained sand 30%fines dry <br /> s <br /> ML CLAYEY SILT 5 3-9 gray trace orange iron oxide stains dry very stiff <br /> ------ -------- -- ----- ---------------- — --------------------------- ----------------------------------------------------------- ------- <br /> —8 <br /> ---- ----- -- ----------- --------------- ---- --------------------------- ------------ -------------------------------------------- ------ <br /> — <br /> ----------------------------- -------------- -- 9 ------------------------------------------ --------------------------------------------------------- <br /> SC CLAYEY SAND 9-11 olive gray 70%fine grained sand 1%medium <br /> 1 v sand 2%coarse sand&fine gravel 27%fines dry <br /> 1 1 <br /> S B41-11 11 0$ _ SW GRAVELLY SAND with CLAY 11'-12 70%fine to coarse grained sand nla <br /> 1 2 15-20%fine-ravel 10-15%fines-dr- --------------------------------------------------------- <br /> ----- -------------------- --------------- ---- ---2 ----n-- <br /> _ ML CLAYEY SILT 12-13' gray dry stiff <br /> 1 3 <br /> _ SANDY SILT 13-13 5' gray 10-20%fine grained sand dry stiff <br /> 1a <br /> ------ ---- --- ---------------------- ---- -- ----- ----- --5-----`------`------ - --------------------- <br /> _ SM SILTY SAND 13 5-15+' olive gray 80-85%fine grained sand 1%coarse <br /> 1 b rained sand 15-20%fines d --------------------------------- _________ <br /> i 6 no recovery 15' 18' <br /> 1 7 <br /> ------ -------- -------------------------- — ------ -------------------------------------------------------------------------------- ------- <br /> 1 8 ML SILT 18-20 5 grayish brown trace yellow staining and white caliche <br /> --------------- --------- -------- — - 9 -------------- --- -------- g_ <br /> ------------------------------------------- <br /> 3-5%fine grained sand dry18-20 moist 2D-20 5 <br /> A -----------r 1s <br /> 2 0 <br /> - --------------- - ---- -------- ------------------------------------------------- <br /> Comments <br />