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PROJECT: TRACY GRAVEL PITS <br /> Tracy, California Log of Boring No. GMX-25 (cont'd) <br /> SAMPLES 0 <br /> H 7":' <br /> 2 Z E DESCRIPTION REMARKS <br /> W <br /> 4? O0 w a NAME(USCS):color,moist, %by wt.,plast.density,structure, <br /> LU cementation,react.w/HCI,geo. inter. <br /> POORLY GRADED GRAVEL with SILT and SAND (SP-GM): _ <br /> cont'd <br /> 34 - <br /> 0 <br /> 35 - <br /> 0 Grab groundwater sample <br /> T wet - GMX-25-082305 collected <br /> 36 0 - through 5 feet of 1-inch <br /> OD Sch. 40 PVC screen <br /> (0.010-inch slot size) <br /> ---- placed in borehole from 41 <br /> 37 LEAN CLAY with SAND (CL) yellowish brown (10YR 5/2), to 46 feet bgs. <br /> 0 moist, 85%fines, 15%fine to medium sand, low plasticity, hard - Enviro-core drive casing <br /> retracted from bottom of <br /> 38 - boring to 41 feet bgs to <br /> 0 ______ _ maintain surface seal. <br /> SANDY LEAN CLAY (CL): yellowish brown (10YR 5/2),wet, <br /> 39 0 65%fines, 35%fine to medium sand, medium plasticity, soft <br /> 40 0 — <br /> 0 <br /> 41- <br /> 0 --------------------------------- — <br /> CLAYEY SAND with GRAVEL(SC): yellowish brown (10YR <br /> 42 0 5/2),wet, 65%fine to coarse sand, 20% low plasticity fines, <br /> 15%fine to medium gravel <br /> ------------------------------------ <br /> 43— POORLY GRADED SAND with GRAVEL(SP): yellowish <br /> 0 brown (10YR 5/2), wet, 55%fine to coarse sand,40%fine to — <br /> medium gravel, 5%fines <br /> 44 0 — <br /> 0 <br /> 45 — <br /> 46 <br /> Bottom of boring at 46.0 feet Borehole destroyed using <br /> Type 1-11 neat cement <br /> 47 _ grout placed from total <br /> depth to ground surface <br /> with a tremie pipe. <br /> 48- <br /> 49- <br /> 50- <br /> 51 <br /> 8 49 5051 <br /> OAKBOREV(REV.3/00) <br /> Geomatrix Consultants Project No.7066.001 Page 3 of 3 <br />