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31 Oct-O5 <br /> Boring/Well Log Legend <br /> KEY TO SYMBOLSIABBREVIATIONS <br /> -7 First encountered groundwater PID= Photo-ionization detector or organic vapor meter <br /> _T Static groundwater rt <br /> reading in pas per million(ppm) <br /> fbg= Feet below grade <br /> r Soils logged by hand-auger or air-knife cuttings <br /> Blow Counts= Number of blows required to drive a <br /> �( Soils togged by drill cuttings or disturbed sample Cali forna-modified split-spoon sampler using <br /> a 140-pound hammer failing freely 30 inches, <br /> recorded per 6-inch interval of a total 18-inch <br /> QUndisturbed soil sample interval sample interval <br /> (I OYR 4/4)= Soil color according to Munsell Soil <br /> � Soil sample retained for submittal to analytical Color Charts <br /> laboratory <br /> msl= Mean sea level <br /> O No recovery within interval <br /> _ Soils logged according to the USCS <br /> Hydropunch or vapor sample screen interval <br /> UNIFIED SOILS CLASSIFICATION SYSTEM (USCS) SUMMARY <br /> Major Divisions raphic Group Typical Description <br /> Symbol <br /> I <br /> Clean Gravels 4 * GW Well-graded gravels,gravel-sand mixtures, little or no fines <br /> (s5%fines) o <br /> Gravel and o 0 GP Poorly-graded gravels,gravel-sand mixtures little or no fines <br /> Gravelly Soils o <br /> Gravels with Fines GM Silty gravels,gravel-sand-silt mixtures <br /> Coarse-Grained ( ?15% fines) <br /> GC Clayey gravels,gravel-sand-clay mixtures <br /> Soils <br /> (>50%Sands SN/ Well-graded sands gravelly sands, little or no fines <br /> and/or Gravc,ls) Clean Sands <br /> Sand and Sandy (55% fines) SP Poorly-graded sands,gravelly sand, little or no fines <br /> Soils <br /> Sands with Fines SM Silty sands,sand-silt mixtures <br /> ( ?15%fines) SC Clayey sands,sand-clay mixtures <br /> v <br /> g ML Inorganic silts,very fine sands,silty or clayey fine sands, <br /> clayey silts with slight plasticity <br /> Inorganic clays of low to medium plasticity,gravelly clays, <br /> Silts and Clays CL sandy clays,silty clays,lean clays <br /> o Fine-Grained <br /> m — <br /> Soils OL Organic silts and organic silty clays of low plasticity <br /> (>50% Silts – — <br /> and/or Clays) MH Inorganic silts,micaceous or diatomaceous fine sand or silty <br /> o soils <br /> m <br /> 0 <br /> Silts and Clays CH Inorganic clays of high plasticity <br /> OH Organic clays of medium to high plastii.ity,organic silts <br /> CU <br /> a � _ <br /> v Highly Organic Soils — — PT Peat,humus swamp soils with high organic,contents <br /> G <br /> C A M B R I A <br />