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i SECOR International Incorporated 7DH] Date Drilled: Drilling Contractor Project Name: Method/Equipment: Boring Number: WEST ARCO 5450 HOLLOW STEM AUGER 2121102 HAZMAT STOCKTON,CA SPLIT SPOON SB-2 See"Legend to Logs"for Boring Surface Groundwater Depth(ft_): Total Drive Drop sampling method, Diam.(in.): Elev.(ft.): 13 FIRST Depth(ft wt.(lbs.): Dist.(inJ: classifications and laboratory testin methods 8 20.5 140 30 Well Construction a. o i Description Z V) Asphalt and gravel. SILTY SAND(SM):brown(10YR5/3),fine-grained sand,medium dense,slightly moist,moderately cemented,poorly graded,no odor 17 3 SB2 5 SANDY SILT(MI.):brown(10YR5/3),fine-grained sand,low @5 plasticity,firm,dry to damp,weakly cemented,oxidation in matrix (orange),no odor(0,20,70,10). 24 CLAYEY SILT(ML):strong brown(7.5YR5/6),fine-grained sand, 4 SB2 ld moderate plasticity,hard,dry to slightly moist,moderately cemented, @ 10' no odor(0,15,50,35). GROUT 16 SILTY CLAY(CL):brown(10YR5/3),moderate plasticity,firm to 4 SB2 15 hard,wet,weakly cemented,mottled with olive streaks,no odor @151 (0,5,40,55). 23 SILTY CLAY(CL):olive brown(2.5YR4/3),moderate to high 1 SB2 20 plasticity,hard,moist,moderately cemented,no odor(0,0,30,70). @20' The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or samples obtained during drilling. Predominant material types shown on the log may contain different materials and the change from one predominant material type to another could be different than indicated. Descriptions on this log apply only at the specific location at the time of drilling and may not be representative of subsurface conditions at other locations or times. Project No. 77BP.43323.00.0203 Date 3112/02 PR Log of Boring 5450SB2.GP7 Approved by LOG OF BOREHOLE Figure (sheet l of 1)