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SOIL BORING LOG Boring No B-45 Sheet 2 of 4 <br /> Client Former Arco Station 6100 Date 11/15/2005 <br /> AS 25775 Patterson Pass Road Drilling Company Grew Drilling ng type Mobile Drill B-8D <br /> Tracy CA Dnller Chris St Pierre <br /> Protect No U6100 Method Mud Rotary hole diam 5" <br /> Logged By Scott Bittinger <br /> Sample Blow Sa la well Depth <br /> Descriptions of Materials PIA <br /> Construc LITHO <br /> Tvpe No Count Time Recoy t. Scale COLUMN and Conditions PPM <br /> 6 1 <br /> 5 B45-61 13 55 _ SP-SM SAND with SILT 60 5-64' very dark gray fine grained,8-10%fines 0 <br /> s 2 moist — ___—_-- <br /> 6 3 ---- <br /> 6 4 <br /> _ ML SILT Eight olive brown with yellow staining dry very stiff <br /> 6 5 --- <br /> ML SILT light brownish gray to light yellowish brown trace white caliche <br /> --------------------------------------------- s s illy very sLf __-------------—----------------------------------------------------- <br /> S <br /> -- -----S -B45-67-- 1410 ---- s7 --------------------------------------- ------------------------------------- <br /> 0 <br /> s a ML SILT-with-strong caliche cementation 67 5'-68' --------------------- -------- <br /> s s Poor recovery 68'_70 Good recovery 70.71 5' -Material is <br /> ----------- <br /> ----------------------- --------- --- — - -------- <br /> _ SM SILTY SAND,olive brown intermittent cementation 80-85%fine <br /> 7 o grained sand_15_20%siltyfines_moist medium dense _____________—..... <br /> S -_B45.71- ----------1425 t ------------------------------------------------------------------------------- <br /> L <br /> --7 2 very hard at 71_5'_Drilled 71-5_72 5'with tn_cone bit <br /> ----------------------------------- ------------------ — ---------- <br /> 7 3 ____ <br /> _ SM SILTY SAND 72 5'-75 alive brown intermittent cementation 80-85% <br /> S B45-74 1445 7 4 fine grained sand-15 20%°silty fines moist medium dense _ _________________4 <br /> 7 5 -------- <br /> ------------ - <br /> to-cone drilled 75'-77 5 due to cemented conditions <br /> s <br /> 7 7 ---------------------------------------- <br /> ML CLAYEY SILT 77 5-78 light olive brown moist stiff <br /> -- 7 8 ----- -------- <br /> S B45-78 3 5 00 <br /> 7 s SM SILTY SAND with CLAY 78'-83' olive brown 65-75%fine grained-sand, - <br /> ------' ----- — -- --------------— --- ___------------------'- <br /> -------- -------'---------- 25-35%- <br /> _ fines fines are clayey silt moist medium dense <br /> so <br /> Comments <br />