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31-Oct-O5 <br /> Boring/Well Log Legend <br /> KEY TO SYMBOLS/ABBREVIATIONS <br /> -7 First encountered groundwater PID= Photo-ionization detector or organic vapor meter <br /> T Static groundwater reading in parts per million(ppm) <br /> fbg= Feet below grade <br /> Soils logged by hand-auger or air-knife cuttings <br /> Blow Counts= Number of blows required to drive a <br /> California-modified split-spoon sampler using <br /> ({ Soils logged by drill cuttings or disturbed sample a 140-pound hammer failing freely 30 inches, <br /> recorded per 6-mch interval of a total 18-inch <br /> QUndisturbed soil sample interval sample interval <br /> m Soil sample retained for submittal to analytical (10YR 4/4)= Soil color according to Munsell Soil <br /> laboratory Color Charts <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 /> do 4 GW Well-graded gravels,gravel-sand mixtures, little or no fines <br /> Clean Gravels • <br /> (:S;5%fines) 0 <br /> Gravel and P� GP Poorly-graded gravels gravel-sand mixtures little or no fines <br /> Gravelly Soils o 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 •• SW Well-graded sands,gravelly sands,little or no fines <br /> and/or Gravels) Clean Sands <br /> Sand and Sandy (55% fines) SP Poorly-graded sands,gravelly sand,little or no fines <br /> Soils Sands with Fines SM Silty sands,sand-silt mixtures <br /> ( ?15%fines) SC Clayey sands,sand-clay nuxtuies <br /> Q) 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 /> m Silts and Clays CL sandy clays,silty clays, lean clays <br /> o Fine-Grained <br /> Soils OL Organic silts and organic silty clays of low plasticity <br /> o) (>SO%Silts Inorganic silts,micaceous or diatomaceous fine sand or silty <br /> `o and/or Clays) H[H I I I MH soils <br /> m <br /> E Silts and Clays CH Inorganic clays of high plasticity <br /> 0 <br /> tl <br /> as <br /> OH Organic clays of medium to high plasticity,organic silts <br /> m <br /> o. <br /> Highly Organic Soils " � PT Peat,humus,swamp soils with high organic contents <br /> L! 4! t! <br /> • <br /> G <br /> C A M B R I A <br />