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PROJECT: TRACY GRAVEL PITS 9 g <br /> Tracy, California LO Of Boring NO. GMX-27 <br /> BORING LOCATION: Central portion of site, affected area ELEVATION AND DATUM: <br /> Not surveyed; datum is qround surface <br /> DRILLING CONTRACTOR: Precision Sampling Incorporated DATE STARTED: DATE FINISHED: <br /> 8/24/05 8/24/05 <br /> TOTAL DEPTH(ft.): MEASURING POINT: <br /> DRILLING METHOD: Direct push 55.0 Ground surface <br /> DRILLING EQUIPMENT: SD-1 DEPTH TO WATER(ft.) 1 FIRST COMPL. <br /> 38.5 IND <br /> SAMPLING METHOD: Enviro-core sampling system [3'x 1.5"] LOGGED BY:M. Gilmore <br /> HAMMER WEIGHT: NA DROP: NA RESPONSIBLE PROFESSIONAL: I REG. NO. <br /> B. Turner PG 7807 <br /> SAMPLES _ DESCRIPTION <br /> F- a a �'— o E NAME(USCS): color,moist,%by wt.,plast.density,structure, REMARKS <br /> wQ.w E 6 E p O Q a cementation, react.w/HCI,geo.inter. <br /> 0" i�Z in mu_ L " <br /> Surface Elevation: Not surveyed <br /> SILT (ML): grayish brown (10YR 5/2), moist, 90%fines, 10% <br /> fine sand, nonplastic, hard,trace fine gravel - <br /> OVM =Thermo <br /> 1 - Environmental <br /> x _ Instruments 580B PID <br /> 0 calibrated with 100 ppm <br /> 2 - isobutylene standard. <br /> 2 Black tar-like material, odor <br /> 3— <br /> ----------------------------------- <br /> SANDY SILT(ML): dark gray (5Y 4/1), moist,60%fines,40% <br /> fine sand, nonplastic,firm, odor <br /> 4 — <br /> 0 <br /> N <br /> 5 x — <br /> 0 <br /> 6- <br /> 7 7— <br /> x <br /> N <br /> 0 GRAVELLY LEAN CLAY with SAND (CL): dark gray (5Y 4/1), <br /> 8 moist, 55%fines, 30%fine to coarse gravel, 15% low plasticity <br /> fines, dark tar-like material, odor <br /> 9 <br /> ----------------------------------- <br /> CLAYEY SAND with GRAVEL(SC): dark gray (5Y 4/1),wet, - <br /> 10 X 50%fine to coarse sand, 30%fine to medium gravel, 20% low - <br /> plasticity fines <br /> 28 <br /> 11 N - <br /> LEAN CLAY (CL): black tar-like material, odor <br /> N <br /> 12 — <br /> --------------------------------- <br /> SANDY SILT(ML): dark brown (10YR 3/3), moist,60%fines, - <br /> 13 40%fine to medium sand, nonplastic,firm, black tar-like <br /> 1 material, odor <br /> 14- <br /> 15 OAKBOREV(REV.3/00) <br /> Geomatrix Consultants Project No. 7066.001 Page 1 of 4 <br />