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PROJEcT: ROBERTS PROPERTY <br /> Vernalis, California Log of Boring No. SB-15 <br /> BORING LOCATION: GPS N:370 62.890';W: 1210 28.614' ELEVATION AND DATUM: <br /> Not surveyed; datum is round surface <br /> DRILLING CONTRACTOR: ResonantSonic International DATE STARTED: DATE FINISHED: <br /> 8/6/03 18/7/03 <br /> - DRILLING METHOD: Sonic drilling TOTAL DEPTH(ft.): MEASURING POINT: <br /> 100.0 Ground surface <br /> DRILLING EQUIPMENT: ROtosonic rig 114 DEPTH TO WATER(ft.)150.IT 0 NAMPL <br /> ! SAMPLING METHOD: 5-foot continuous core system [5'x 3"] LOGGED BY: _ <br /> M. Goerz/Y. Hashimoto <br /> RESPONSIBLE PROFESSIONAL: REG.NO. <br /> HAMMER WEIGHT: NA DROP: NA <br /> Y. Hashimoto CH.G. 782 <br /> SAMPLES DESCRIPTION <br /> NAME(USCS): color,moist,%by wt.,plast.density,structure, REMARKS <br /> oE C m o g a cementation,react.w/HCI,geo.inter. <br /> N ro v Surface Elevation: Not surveyed <br /> o SANDY SILT(ML): dark grayish brown (10YR 4/2),moist, <br /> 60%fines,40%fine sand,nonplastic,firm - <br /> Global positioning system <br /> (GPS)coordinates for <br /> boring g location acquired <br /> using a hand-held <br /> 2 - Garmin'GPS-5 unit. <br /> -� <br /> 3 _- OVM=Thermo <br /> Environmental <br /> - Instruments 5808 PID <br /> 4 _ calibrated with 100 ppm <br /> -� - - isobutylene standard. <br /> 5 " OVM readings could not <br /> be quantified due to <br /> 6 - equipment malfunction. <br /> _.� 7 - <br /> { � Hand angered to 5 feet <br /> tw - bgs. <br /> 8- <br /> 9- <br /> 10- <br /> 12- <br /> 13- <br /> 14- <br /> a , _ <br /> 9 - <br /> 10 _ <br /> 12 _ <br /> a . <br /> 13 <br /> i.r <br /> 14 --------------------------------- <br /> SILTY SAND(SM): dark grayish brown (10YR 4/2);moist, <br /> xa 60%fine sand,30%nonplastic fines, 10%fine to coarse gravel - <br /> Q 15 <br /> OAKaOREV(REV.]I00) <br /> fg y Geomatrix Consultants Project No.5011.001 Page 1 of 6 <br />