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03-April-07 <br /> BoringlWell Log Legend <br /> KEY TO SYMBOLS/ABBREVIATIONS <br /> -7 First encountered groundwater PID Photo-ionization detector or organic vapor meter <br /> reading in parts per million(ppm) <br /> Static groundwater <br /> 1bg= Feet below grade <br /> Soils logged by hand-auger or air-knife cuttings <br /> Blow Counts r 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 falling freely 30 inches, <br /> recorded per 6-inch interval of a total 18-inch <br /> Undisturbed soil sample interval sample interval <br /> Soil sample retained for submittal to analytical (10Y 4/4)= Soil color according to Munsell Soil <br /> laboratory Color Charts <br /> ms]= 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) UMMARY <br /> Major Divisions raphic Group Typical Description <br /> Symbol <br /> AO <br /> GW Well-graded gravels,gravel-sand mixtures,little or no fines <br /> Clean Gravels + <br /> (55%fines) a <br /> Gravel and GP Poorly-graded gravels,gravel-sand mixtures,little or no fines <br /> Gravelly Soils z <br /> Gravels with Fines 4t GM Silty gravels,gravel-sand-silt mixtures <br /> Coarse-Grained { z 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 /> 055%fines) SP Poorly-graded sands,gravelly sand,little or no fines <br /> Sand and Sandy <br /> Soils SM Silty sands,sand-silt mixtures <br /> Sands with Fines '. <br /> ( z 15%fines) SC Clayey sands,sand-clay mixtures <br /> iu 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 /> Fine-Grained _ <br /> Soils —_— OL Organic silts and organic silty clays of low plasticity <br /> (>50%Silts Inorganic silts,micaceous or diatomaceous tine sand or silty <br /> o and/or Clays) MH soils <br /> m <br /> 0 <br /> Silts and Clays CH Inorganic clays of high plasticity <br /> >i <br /> OH Organic clays of medium to high plasticity,organic silts <br /> n — <br /> E Highly Organic Soils — PT Peat,humus,swamp soils with high organic contents <br /> E <br /> CONESTOGA—ROVERS <br /> &ASSOCIATE <br />