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LITHOLOGIC LOG BORING No. STK-6 Logged By:Jennifer Gruda Date Started:10/9/07 Client:PG&E ' Checked By:Rick McCartney Date Completed:10/9/07 Site:Stockton A Substation Driller:Precision Sampling/Ernesto Northing:- Location:Stockton,California Drilling Method:Hand Auger(0-5 ft)/Direct Push(5 ft-Total Depth) Easting:- Project No.:PGE-1035-400 Sampling Method:Hand Auger Bucket/2"x 5'core barrel Elevation:- ' Sampling Interval:Continuous Boring Depth: 10 Feet Page: 1 of 1 c E m c 9 c o ' o _Jm DESCRIPTION x Sample I.D. m > o 6 N m 0 Concrete(former building pad). ' STK-6-1,5 yi SWWell graded SAND,dark yellowish brown,dry,loose,medium-to z ---- coarse-grained,no odor. g j� CL Sample STK-6-1.5 collected from 1.5-1.75 feet bgs_ ' CLAY,dark yellowish brown,dry,stiff,medium plasticity,trace 0 / medium-grained sand,no odor. / At 3 feet,becomes dark grayish brown to dark brown,moist,soft to medium stiff,little fine-grained sand,orange brick pieces. _ ' 4 3 \. ______ _________dark___________________________________ CH Fat CLAY,dark yellowish brown to grayish brown,moist,settle medium stiff,high plasticity,no odor. STK-6-5.0 3 \ Sample STK-6-5.0 collected from 5-5.25 feet bgs. _ ____ At 5 feet,becomes medium stiff to stiff. _- t CL Lean CLAY,dark yellowish brown to brown,dry,stiff,no to low 6 3 / plasticity,no odor. j At 7 feet,becomes very stiff. At 8 feet,lean CLAY,brown,moist,soft to slightly medium stiff,low 8 4 / plasticity. At 8.5 feet,becomes soft. / Sample STK-6-9.0 collected from 9-9.5 feet bgs. STK-6-M 4 At 9 feet,becomes less plastic. NR No recovery. 10 12- 14- Notes: ztoNotes:Boring completed to 10 feet bgs.Groundwater was not encountered.Borehole backfilled with neat cement from total depth to TERRA PACIFIC GROUP surface.Surface repaired to match surroundings. ' Environmental Engineering,Consulting,and Construction