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SOIL BORING LOG Boring No B-42 Sheet 5 of 7 <br /> Client Arco Station 6100 Date 4/21/2004 <br /> Address 25775 Patterson Pass Road Drilling Company GreggDrilling rig type Mobile Drill B-53 <br /> Tracy CA Driller Robert <br /> Pri"t.No U6100 Method Mud Rotary hole diam 5" <br /> Logged By Scott Bittinger <br /> Sample Blow Sam le woll Depth Descriptions of Malenals Pit) <br /> Construc LITHO <br /> Type No Count Time Recov t Scale COLUMN and Conditions PPM <br /> _ Dnlled 80'to 82 5 with a to-cone bit due to hard conditions No care <br /> 8 1 recovered <br /> 8 2 <br /> 8 3 <br /> _ SM SILTY SAND 83'-86 5' olive brown 60-70%fine sand 83'-84 75-80% <br /> s 4 fine sand 84'-86 5' moist medium dense <br /> S 1342-85 12_17 s 5 16 <br /> 8 6 <br /> ------------------------ -- ---` ------------- 8 7- — ---- - ----to---c--ane------b----d <br /> it -ue---------toha <br /> ----rd co---n---ditions F---- ----o--r--ma---tion----li--kel---1----- -------- <br /> _ Drilled 86 5'-90'+nnth a y <br /> s 8 SS? sandstone <br /> as <br /> 9 d <br /> 9 Z <br /> S B42-91 13 10 _ ML SILT 90'-94 5',light olive brown 0-5%very fine grained sand dry stiff 36 <br /> -------------- <br /> _ ____________________________________ 8 Z __-__-__-------------------------__-_____-_______________________-------------_-__________________ __---_-- <br /> 9 3 <br /> 9 4 <br /> s 5 CL SILTY CLAY 94 5-95 light oUve brown moist medium stiff <br /> 9 6 - <br /> _ no recovery 95'-97 5' <br /> s 7 __________ <br /> _ SS SANDSTONE 97 5-97 6 <br /> s e C CLAYEY SAND 97 6-98' h ht olive brown 70%finerained----- <br /> sand 30% <br /> - - - - ------------------ - ------- — -- - - -- - ------------- ---- — -- -- - <br /> S B42-98 13 40 _ fines damp medium stiff 753 <br /> 9 9 <br /> _ ML SILT 98-100 2 light brown with black manganese oxide stains moist <br /> 100 stiff <br /> Comments <br />