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SOIL BORING LOG Boring No B-42 Sheet 6 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 /> Protect No U6100 Method Mud Rotary hole diam 5 <br /> Logged By Scott Bittin er <br /> Sample Blow Sample well Depth Descriptions of Materials PID <br /> Construc LITHO <br /> Type No Count Time Recov t Scale COLUMN and Conditions PPM <br /> ------------------------------------------------------ <br /> 101 SILTSTONE pluggedre_ <br /> cobarrel at 100.2' No recovery 100 2'_102 5 _________ <br /> ------`--------- <br /> 102 <br /> 103 <br /> _ ML SILT 102 5'-111' olive brown trace white caliche 102 5'-105 no caliche <br /> S B42-104 1405 104 105'-111' trace black manganese oxide stains dry-very stiff 17 <br /> ----------------------------------------- - ----- ---- ---------------- - -------` — <br /> 105 <br /> 106 <br /> 107 <br /> f0a <br /> S---. B42-109 1419 109 2 <br /> ----- --------------------------------------------- ---------------------------------------------------------------------------------------------------------- <br /> 110 <br /> 111 <br /> _ ML SILT with medium caliche cement 111'-111 5 light olive brown,dry hard <br /> 112 no-recovery-1-1 1 5-112 5' <br /> 113 ML SILT h hE oLve brown no caliche 112 5-113 medium caliche resent <br /> ----------------------------------------------------- - - — - ----- ----------------------------------- ----- --------------------------- <br /> 113_ -113 5 dry stiff to very stiff <br /> S 842.114 1440 iia ML CLAYEY SILT 113 5-114 6' Ilght olive_brown dry stiff --- 2 <br /> -__-- 116 ML SILT 114 6'_115'_light olive brown_trace white caliche dry,hard <br /> 116 Caliche concretion lu ed core barrel at 115' No recove 115'-117 5 <br /> 117 ------------ <br /> _ SM SILTY SAND 117 5-117 7 olive brown,60%fine grained sand 40% <br /> -------- -------------------- <br /> 11e fines dry dense <br /> - - - -- ----dry-d --------- <br /> ------- 119 ML SILT- fight olive brown trace white caliche dry_vera stiff........... _ <br /> ________ _____________________________________ 117_7__120' ____ _ <br /> 120 1 <br /> Comments <br />