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SOIL BORING LOG Boring No B-41 Sheet 4 of 7 <br /> Client Arco Station 6100 Date 4/19/2004 <br /> Address 25775 Patterson Pass Road Drilling Company GreggDrilling nq type Mobile Drill B-53 <br /> Tracy CA Driller Robert <br /> fb,oje,t No U6100 Method Mud Rotary hole diam 5 <br /> Logged By Scott Bittin er <br /> Sample Blow Sam le well Depth Descriptions of Materials PID <br /> Construc LITHO <br /> Type No Count Time Recov t Scale COLUMN and Conditions PPM <br /> 6 1 <br /> _ SM SILTY SAND 60 2'-63 olive brown 80%fine grained sand 20%fines 4 <br /> 5 B41-62 1405 6 z <br /> 6 3 <br /> 6 4 ML SANDY SILT 63-65 olive to olive brown white caliche present from <br /> - - -^ ^ - - - — ------- -- --- - --- ---- - - ---------------- -------- <br /> 63 5-64 5 dry stiff <br /> 6 5 <br /> 6 6 SS very little recovery 65'_67 5' piece of cemented sand/sandstone <br /> --------------------- --------------------------------- — - - -------------------------- <br /> _ plugged coring barrel <br /> 6 7 <br /> 6 B <br /> _ SP-SM SAND with SILT 67 5'-72' dark olive gray 90%fine grained sand <br /> S B41 69 14 35 6 9 10%fines moist medium dense 8 <br /> ---- -- -- - -------- - --------- — -- -- _ - ---------------- ------------------------------------------------------------------ <br /> 7 0 <br /> ----------------------------------------------------- -- --------------------------------------------------------------------------------------------------------- <br /> S B41 71 _1445 7 1 4 <br /> 7 2 <br /> ML SILT 72-76 olive gray 3-8%very fine grained sand moist stiff <br /> 7s <br /> S 1341-74 1455 7 a NIA <br /> 7 5 <br /> -------- ------------ ----------------------- --------- -------------------------------------------------------------------------------------------------- -------- <br /> 7 6 <br /> _ SS CEMENTED SILTY SAND 76'-78' olive gray 70-75%fine grained sand <br /> ------- 7 7 25 30%fines dry_very hard------- <br /> 7 8 <br /> ----------------------------------------------------- -- ---------------------------------------------------------------------------------------------------------- <br /> S 641.79 15 07 7 9 SM SILTY SAND 78'_80' dark graysh brown 60.70%fine grained sand 17 <br /> -------- ------------------ --^ — - <br /> _ 30 40%fines moist medium dense <br /> 8 0 <br /> Comments <br /> i <br />