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SOIL BORING LOG Boring No. 048 Sheet 5`of 5 <br /> Client Former Arco Station 6100 Date 11/21/2005 <br /> Address 25775 Patterson Pass Road Drilling Company Gregg Drilling ria type Mobile Drill B-80 <br /> Tracy,CA Driller Chris St.Pierre <br /> Project No. U6100 Method Mud Rotary hole diam� 5" <br /> Logged By: Scott Bittinger <br /> MS� <br /> am le Blow Sam le well Depth <br /> Construc LITHO Descriptions of Materials PID <br /> No. Count Time Recov, I. Scale COLUMN and Conditions <br /> _ M SILTY SAND 120'-121.5',very dark grayish brown,85%fine grained PPM <br /> ------------ _______ _-__ 121 sand,15%fines,trace cementation,tlamp_medium de_ns_e _________ <br /> 848.121 10:45 ________-_____-____-________________________ ________cemented material plugged sampler. No recovery 121 5 122.5- p-- <br /> _______-__ ______ _______ 122 <br /> __________- ___ 123 <br /> SM SILTY SAND,olive brown to very dark grayish brown,65-75%fine <br /> S -848-124 10:55 _ 124 rained sand 25 35/ sll fines trace cementation moist,medium dense 0 <br /> _ (122.5'-126.5') <br /> ________ _________ 125 <br /> _ __________ _ 126 <br /> S848.126 11:00 ______-__ -______-_____--------__________________________--___------------------------------- <br /> 0------- <br /> -------______________ ________-_ ________ ____-____ 127 SAND with SILT 126.5-130',ve-r�1 dark�rayish brown_90-95%fine ____________ <br /> SP-SM grained sand,5-10%fines,trace cementation 126.5'-127.5',damp to <br /> ____-___---___------ ________ ________ 128 wet,medium dense <br /> ---------_------------___-------------------------------_----_-------_-------- <br /> S B48-129 11:06 ___-_____ 129 <br /> _____________ --------- ------------------------------------------------------ p <br /> ______________________ ---------___ ___----- __-_---- 130 <br /> -------- __---------- -__----- _________ 131 <br /> ML SILT w th CLAY,light olive brown,trace cementation,dry to moist, <br /> --- ----_B48-131- ---------_-- 11:13 - —_--- 132 ve stiff 130'-133' - <br /> 133 <br /> S B48-133 11:20 SILTY SAND 133'-134',light olive brown,60%fine grained sand,40°/ 0 <br /> ________ ________ 134 S silty fines,moist <br /> ______________________ -------___ --------- -----__ 135 <br /> _____ <br /> ML SILT,light olive brown,1-7°h very fine grained sand,dry,very stiff <br /> ________----------___ _----_---- --------- --_----- 136 <br /> --- --- —848.137 11:30 _-___-- 137 <br /> ______________------------------ <br /> _----------- <br /> ______--__________-______-_____- _ _ <br /> ML SILT,light olive brown,trace white caliche,dry,very stiff(136'-140') 0 <br /> ______________________ _____________ ________ All— <br /> comments: <br /> total depth of borehole is 140'bgs <br />