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PROJECT: BURNS PROPERTY j <br /> Tracy, California Log of Boring No. GMX-28 <br /> ' BORING LOCATION: 1881 West 11 th Street ELEVATION AND DATUM: <br /> Not surve ed; datum is ground surface <br /> DRILLING CONTRACTOR: Precision Sampling Incorporated DATE STARTED: DATE FINISHED: <br /> 10/12/00 10/12/00 <br /> ' TOTAL DEPTH(ft.): MEASURING POINT: <br /> DRILLING METHOD: Direct push 18.0 Ground surface <br /> FIRST COMPL. <br /> DRILLING EQUIPMENT: XD-3 DEPTH TO WATER(ft.) 14.75 11.5 <br /> ' SAMPLING METHOD: Er1VIfO-COTe Sampling system [3'x 1 5/8"1 LOGGED BY:T. Loar <br /> HAMMER WEIGHT: NA DROP: NA <br /> RESPONSIBLE PROFESSIONAL: REG. NO. <br /> ' G. Foote 5044 <br /> SAMPLES Q DESCRIPTION <br /> 2 ? E NAME(USCS): color,moist, %by wt., plast.density,structure, REMARKS <br /> Q12 cn Z rn m LL 00 < a cementation, react.w/HCI,geo. inter. <br /> ' Surface Elevation: Not surveyed <br /> ASPHALTIC CONCRETE <br /> AGGREGATE BEDROCK <br /> OVM =Thermo <br /> ' 1 <br /> SILTY SAND (SM): yellowish brown (10YR 5!4), moist, 80% - EnvironmentalInstruments 5806 PID, <br /> 0 <br /> fine sand, 20% nonplastic fines,firm calibrated with 100 ppm <br /> ' 2 - isobutelyne standard. <br /> 0 Cleared upper 2'with <br /> 3 - Modified California drive <br /> ' 4 T iron oxidation staining along microfractures _ sampler. <br /> 0 <br /> --------------------------- <br /> SANDY SILT(ML): dark yellowish brown (10YR 3/6), moist, <br /> lie 5 70%fines, 30%fine sand,firm <br /> 7.5 - <br /> ' —dark greenish gray(5GY 3/1), hydrocarbon odor ———————- <br /> 6 LEAN CLAY with SAND (CL): dark greenish gray (5GY 3/1), <br /> moist, 80%fines,20%fine sand, medium plasticity, high dry <br /> 13' <br /> 7 strength,firm _ <br /> Grab groundwater sample <br /> 152 - GMX-28-1000 collected <br /> _ through 5'of 1"OD Sch. <br /> 8 <br /> ' 40 PVC screen (0.01"slot <br /> size)placed in borehole <br /> 186 from 18'to 13'bgs. <br /> 9 Drive casing retracted <br /> ' = from bottom of boring to <br /> 147 15'bgs to maintain <br /> 10- surface seal. <br /> T light bluish gray(10B 8/1), pockets of soft calcium carbonate - <br /> ' 11 176 cemented clay - <br /> T <br /> + soft - <br /> 12 --------------------------- <br /> 27 <br /> --- -- -------- -- <br /> 27 SANDY LEAN CLAY(CL): dark bluish gray (106 4/1), moist, <br /> 13 70%fines, 30%fine sand, low plasticity, soft, very slight <br /> hydrocarbon odor _ <br /> Tyellowish brown (10YR 5/4), no hydrocarbon odor <br /> 14 =0 <br /> ' L T wet,60%fines,40%fine sand <br /> 15 OAKBOREv(REV.aroo) <br /> Geomatrix Consultants Project No.6115.007.0 Page 1 of 2 <br />