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Logged By: Date Drilled: Drilling Contractor: Method/Equipment: Boring Number: 16 HOLLOW STEM AUGER Todd Brown 5/21/97 Mitchell Drilling CME 75 HT SB-2 See Legend toLogs" or Boring Ground Groundwater Elevation(ft.): Total Drive Drop sampling method, Diam.(in.): Elev.(ft.): Q Depth(ft.): wt.(Ibs.): Dist.(in.): classifications and laboratory 1 11.0 50.5 140 30 testing methods 8 no Well H " 3 Description a a Construction ZC, E 4 ...same as above 0 - SB2-30 30 3 (CL) CLAY, soft, wet, moderate yellowish brown, no 4 petroleum odor 9 (SM) Silty SAND, fine grained, saturated, dark yellowish 0 - SB2-35 35 22 brown, micaceous, no petroleum odor 30 ...interbedded with Sandy SILT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 SB2 40 (CL) CLAY, stiff, saturated, moderate yellowish brown, 0 - : Abondoned 40 9 wet, no petroleum odor with Neat Cement Grout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 (SM) Silty SAND, saturated, moderate yellowish brown to 0 _ SB2-45 45-112 dark yellowish brown, no petroleum odor 14 4 As above, more prominent bedding of Sands with mixed 0 - 50 6 Sandy CLAYS, no petroleum odor 11 Total depth = 50.5 feet below ground surface Hnu readings are in ppm 55 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. 40007-130-01 Date MAY 97 Log of Boring Figure A-6 (sheet 2 of 2)