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SOIL BORING LOG Boring No B-39 Sheet 5 of 8 <br /> Client Arco Station 6100 Date 2/17/2004&12/18/2004 <br /> Address 25775 Patterson Pass Road Drilling Company Gregg Drilling rig type Mobile Drill 8-80 <br /> Tracy,CA Driller Chris <br /> Oct No U6100 Method Mud Rotary hole diam 5" <br /> Logged By Scott Blttin er <br /> ample Blow Sample well Depth Descriptions of Materials PED <br /> Construe LITHO <br /> Type No Count Time Recov t Scale COLUMN and Conditions PPM <br /> a t ML SILT-76-82,olive brown_dry very stiff------------------------------------------------ -------- <br /> a z <br /> S B39-83-- 1540 ------- 8 3 ML SANDY SILT 82'-84',olive brown 30-40%fine gained sand,moist,stiff -- 23 <br /> 8 4 <br /> a 5 SM SILTY SAND 84'-88',olive brown 40-50%fines 84'-86 5' 20%fines <br /> _ 86 5-88 moist dense <br /> S B39-86 1600 e 6 61 <br /> B 7 <br /> -- S -_ 639-88 1615 8 a 25 <br /> ML SANDY SILT 88'-89' olive brown 25-35%fine grained sand,moist <br /> as <br /> s o SM SILTY SAND 89-91 olive brown 40-50%fines moist dense <br /> S B39-91 1630 9 1 69 <br /> - --- - 9 2 Drilled through cemented sod from 91'to 94'bgs with a tri-cone drill bit <br /> No soil care recovered material likely siltstone <br /> '__-'-----------`--------------------------------------- 9 3 ------------------------`-`----------------------------------------------------------------------' -------- <br /> 9 4 <br /> - S B39-95 17 20 - - 9 5 SM SILTY SAND 94__96,olive brow_n 80%o fine gained sand 20%fines---- - 110 <br /> ----------- - — - <br /> _ moist dense <br /> 9 fi <br /> 9 7 <br /> 9 8 <br /> _ Cemented sand/sandstone plugged core barrel between 96'and 101' <br /> ------------------------------------- <br /> ----------------- s 9 b s Poor recove ---------------- -------- <br /> 100 <br /> Comments Stopped drilling at 96 bgs on 2117 Resumed an 2118 <br />