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SOIL BORING LOG Boring No B-42 Sheet 7 of 7 <br /> Client Arco Station 6100 Date 4/21/2004 <br /> Ass 25775 Patterson Pass Road Drilling Company Grego Drilling rig type Mobile Drill B-53 <br /> Tracy,CA Driller Robert <br /> Project No 136100 Method Mud Rotary hole diam 5 <br /> Logged By Scott Bittinger <br /> Sample Blow Sample Well Depth Descriptions of Materials PID <br /> Construe LITHO <br /> Type No Count Time Recov It Scale COLUMN and Conditions PPM <br /> 121 <br /> ---------------------- ------------- -------- --------- ---------------------------------------------------------------------------------------------------------- <br /> _ CL SILTY CLAY 120'-123' light olive brown moist,stiff <br /> --- ------S B42-122------- 1510 122 1 <br /> -- ----- - ------------- -------- --------- ---------------------------------------------------------------------------------------------------------- <br /> 123 <br /> _ ML SILT 123-125 8 light olive brown trace white caliche trace black <br /> -------- 124 manganese oxide stains dry stiff______ __________ <br /> S------642-12--- <br /> -5---------------- 15 20 125 1 <br /> ----- ---- - -------- --------- ---------------------------------------------------------------------------------------------------------- <br /> ---- 126 SM SILTY SAND 125 8-12650-60%fine-grained sand 40-50%fines <br /> _ trace cementation dry dense <br /> 127 core barrel plu �ed at 126_-_No recovery 126-=127 5' <br /> ----------------------- ------------- -------- --------- - - - -------------------------------- <br /> _ incomplete recovery 127 5-130' <br /> 128 ML SILT li ht olive brown d ff __________ <br /> - - -- -- -- - -- ------5------ --- -- --'� <br /> _q ------------------------------------------------------ <br /> S <br /> 12s - ` CL SILTY CLAY 129'-132 2' light olive brown dry to moist stiff - <br /> ------------------------ ------------- -------- - ---------------------------------- - - --------------------------- <br /> 130 <br /> ---------------------- ------------- -------- -------- ---------------------------------------------------------------------------------------------------------- <br /> 131 <br /> ------------------------ ------------- -------- --------- ---------------------------------------------------------------------------------------------------------- <br /> B42-132 1550 132 0 <br /> ML SILT 132 2'-133' light olive brown dry stiff <br /> 133 <br /> ------------------------------------ -------- 134 ML CLAYEY SILT 133'- <br /> -------- ---------------------------133----5---fight olive-- brown dry-stiff--- <br /> ----------------------------------- <br /> 135 no recovery 133 5-135 <br /> 136 <br /> ------------------------------------ -------- - --------------------------------------- <br /> 137 <br /> -------------------------------------- ------------------ ---------------------------------------------------------------------------------------------------------- <br /> 138 <br /> 139 <br /> ---------------------- ------------- -------- -------- ---------------------------------------------------------------------------------------------------------- <br /> 140 <br /> Comments total depth of boring is 135 bgs <br />