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SOIL BORING LOG Boring No B-40 Sheet 3 of 8 Client Arco Station 6100 Date 2/19/2004 Address 25775 Patterson Pass Road Drilling Company Gregg Drilling rig type Mobile Drill B-80 Tracy,CA Driller Chris Vr0j'ct No U6100 Method Mud Rotary hole dram 5" Logged By Scott Blttmger Sample Blow Sample well Depth Descriptions of Materials PID Construc LITHO Typo No Count Time Recov t Scale COLUMN and Conditions PPM a t ML SILT Ili ht brownish gray,trace clay dry hard - 4 2 4 3 4 4 ML SILT and CALICHE light gray trace yellow stains dry very hard - ------------ --------- ------------------ 4 5 ------------------------------------`---------------------------------------------------------------------- --------- a , gdry ------------------------------------------ 6 CL SILTY CLAY 45'_47 5' light brownish gray trace white caliche - -- - - - -------- ------------ _ stiff 4 7 5 B40-48 1051 a a SM SILTY SAND 47 5-48 5.-olive-brown--5-0-60%fine-grained sand,40.50%0 162 fines trace clay moist dense --------------------- ------------------------------- 4 9 ------------------------------------------------------------------------------------------------- -------- no recovery 48 5-51 5 0 5 1 SILTY SAND 51'-51 8' olive brown 50.60%fine grained-sand 40.50% 122 640-51 11 03 _ fines,trace clay moist dense --------------`------------------------- s 2 5 3 --------------------- ------------------------------- s 4 ML SILT 51 8-58 5' Might brownish gray trace white caliche from 54-56' — - -- -- - - ----------------------------------------- -------- dry stiff to very stiff --------------------------------- 5 5 5 6 5 7 -- 5 -640.58 1117 ------- 5 B 64 ------- no-r-e-co-very 58 5'-61 -------- ---------------------------------------------------- -------- so Comments