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SOIL BORING LOG Boring No B-42 Sheet 1 of 7 <br /> tient Arco Station 6100 Date 4/21/2004 <br /> Address 25775 Patterson Pass Road Drilling Company GreggDrilling ri-q type Mobile Dnll B-53 <br /> Tracy CA Driller Robert <br /> Project No U6100 Method Mud Rotary hole diam 5 <br /> Logged By Scott Biltin er <br /> Well Pack sand It 10 ft Well Construction casing screen <br /> bent ft to ft easing dram screen slot <br /> grout ft to ft Depth to GW ft Time/Date ft Time/Date <br /> Sample Blow Sam le Well Depth Descriptions of Materials PID <br /> Constru LITHO <br /> Tvoe No Count Time Recov ct Scale COLUMN and Conditions PPM <br /> — <br /> ---------------------- ---------------------- — t ------------ ------------------------------- ----------------------------------------------------- <br /> 2 ML SILT dark olive gray upper 2 disturbed from tilling dry - <br /> 3 <br /> ------------------------ ------ —4 ....... -- - ----------------------------------------------- ------------------- -------- <br /> CLAYEY SAND 4'-5' light olive gray with white caliche,70%fine <br /> 5 SC grained sand 30%fines dry <br /> ------------------------------------ — ---------- <br /> ____ 6 <br /> _ ML CLAYEY SILT 5 8,grey trace orange Iron oxide stains trace caliche dry <br /> 7 stiff <br /> �. 8 <br /> ----- -------- --- --------- ------ — ---------------------------------------------------------------- ------- ------------ ---------- <br /> ML SILT 8 10 gray with orange Iron oxide stains trace clay dry stiff <br /> ---- ---------------------- ------- ------ — ----------------------------------------------------- -------------------- ------ ----- --------- <br /> 1 0 <br /> _ SAND 16 <br /> -- <br /> 102' fine grained <5%fines dry <br /> 1 1 <br /> _ ML SILT 10 2-12 5 graywith orange iron oxide stains trace clay 0 1% <br /> t 2 very-fine-grained sand dry_very stiff ________ <br /> _ SILTY SAND 12 5-13 6 pale olive 70%fine sand 1%medium sand <br /> 1 3 SM I%coarse sand 28%fines d dense <br /> _ SILT 13 V-13 9,gray with white caliche black manganese oxide and <br /> t 4 yellow r <br /> stains dry very stiff <br /> ------ ---------------------- ------- ------- — ---s d ---------------- ---------------------------------------- <br /> _ SILTY SAND 13 9-14 1 pale olive 60%fine grained sand 40%fines dry <br /> 1 5 dense <br /> ML CLAYEY SILT 14 1-17 2 olive gray with white caliche and yellow stains <br /> ------------ --------------------- ------- 1 8 dry very stiff------------------------- ----- ---------------------------------------------- <br /> 1 7 <br /> ------ ---- ----------------------- — – -` -i --- ------- -fine-`r l- nil--oarse-------------------- <br /> ML CLAYEY SILT 17 2-17 6 light olive gray 2-3%fine gravel and coarse <br /> 1 e framed sand dry_very stiff---________ <br /> _ ML SILT 17 6 188 fight olive gray with while caliche and yellow staining, <br /> - 1 9 trace cla d stiff <br /> _ ML SILT with SAND 18 8-21 grayish brown 6-10%very fine grained sand <br /> 2 0 trace clay dry stiff -------- --- <br /> Comments <br />