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LITHOLOGIC LOG BORING No. STK-2 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 r E a c ? 0 0 v � „ m DESCRIPTION Sample I.D. m o o o c U�p > n NrnCL E y ri h m a a 0 3 0 •t•"° GW Aggregate Base IV') •�; ° • ______ Well graded GRAVEL,dry,loose_,trace sand. - STK-2-0.5 1 Poorly graded SAND with SILT,dusky yellowish brown,dry,loose, medium-grained,little fine subrounded gravel,little orange brick SP-SM pieces,no odor. Sample STK-2-0.5 collected from 0.5—1 feet bgs. z ::. ________________ STK-z-3.0 j CL Lean CLAY,dark yellowish brown,slightly moist,medium stiff, medium plasticity,little fine-grained sand,no odor. / Sample STK-2-3.0 collected from 3—3.5 feel bgs. 4 24 / At 4 feet,becomes sok to medium stiff,slight petroleum odor. STK-2-5.0 1 / Sample STK-2-5.0 collected from 5—5.5 feet bgs. At 5 feet,becomes moist,medium stiff to stiff,moist,very slight 6 / petroleum odor. At 5.5 feet,becomes highly plastic. j At 6 feet,becomes stiff and medium plastic. At 7 feet,becomes stiff with low plasticity,trace to little medium- 3 36 grained sand,no odor. / At 9 feet,becomes slightly moist and non-plastic. STK-2-9.5 / Sample STK-2-9.5 collected from 9.5—10 feet bgs. 10- 12- 14- Notes: 0121aNotes:Boring completed to 10 feel bgs.Groundwater was not encountered.Borehole backfilled with neat cement from total depth to TERRA PACIFIC GROUP surface.Surface repaired to match surroundings. Emlronmemal Engineering,ConsuPong,and Construction