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DEPTH SAMPLE BLOW COUNT *vow DRY UNIT MOISTURE GASTECH <br /> t I DESCRIPTION USCS WEIGHT CONTENT READING <br /> First Last <br /> ft OWL a In 12 in Ib/fts '!< PPm <br /> 0'- 6' Brown, silty CLAY, moist, medium <br /> stiff, medium plasticity <br /> gravelly at top foot ' <br /> 3 11 0 <br /> CL <br /> 4 • <br /> 3 9 " ,' 0 <br /> 6'- 16' Light brown, clayey sandy SILT, <br /> damp, medium stiff, low plasticity <br /> 8 <br /> y <br /> 2 9 HL 0 <br /> 12 <br /> 16 5 22 — 0 <br /> 16' - 20' Brown, clayey fine to medium <br /> SAND, wet, medium dense, low <br /> plasticity SC <br /> 20 20'-21.5' Brown, clayey sandy SILT, moist, — <br /> 2 8 medium stiff, low plasticity HL <br /> Boring terminated at 21.5 ft <br /> Groundwater encountered at 12 ft <br /> 24 <br /> Date Drilled: 12/14/90 <br /> Former Puregco Facility LOG OF BORING NO. TB-4 <br /> BALBI & CHANG ASSOCIATES PROJECT No2037-1 DATE 12/27/90 <br /> } Geotechnical Consultants / Materials Testing PREPARED BY GY14 PLATE A-5 <br /> tit! <br />