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UNIFIED SOIL CLASSIFICATION SYSTEM <br />MAJOR DIVISIONS <br />LTR <br />DESCRIPTION <br />MAJOR DIVISIONS <br />LTR <br />DESCRIPTION <br />GWWell-graded <br />gravels or gravel sand <br />ML <br />Inorganic sifts and very One - <br />mixtures, little or no fees <br />grained sands, rods flour, silty <br />or clayey fine sands or clayey <br />GP <br />Poodyyraded gravels or gravel <br />GRAVEL <br />SILTS <br />silts with slight plasticity <br />AND <br />sand mixture, little or no tines <br />AND <br />GRAVELLY <br />CLAYS <br />CL <br />Ilnorgenic days of low to medium <br />p31astidty, gravelly days, sandy <br />Silty gravels, gravel -sand -day <br />SOILS <br />GM <br />mixtures <br />LL<50 <br />days, silty days, lean days <br />Clayey gravels, graveFaand-lay <br />Organic slits and organic silt - <br />COARSE <br />GC <br />mixtures <br />FINE <br />OL <br />days of low plasticity <br />GRAINED <br />GRAINED <br />SOILS <br />Wel4raded sands or gravelly <br />Inorganic sifts, micaceous or <br />SOILS <br />SW <br />MH <br />diatomaceous fine-grained sandy <br />sands, little or no fines <br />or gilt "Ns, els tic sifts <br />SAND <br />SILTS <br />AND <br />SP <br />Poorly -graded sands or gravelly <br />CH <br />Inorganic days of high plast- <br />AND <br />sands, little or no fines <br />CLAYS <br />!city, fat days <br />SANDY <br />SOILS <br />LL>50 <br />OH <br />Organic days of medium to high <br />SM <br />Silty sands, sand -silt mixtures <br />plasticity <br />HIGHLY ORGANIC <br />Pt <br />Peat and other highly organic <br />SC <br />Clayey sands, sand -day mixtures <br />SOILS <br />awls <br />SAMPLE CONDITION <br />NO RECOVERY <br />SAMPLED INTERVAL <br />_ DESCRIBED SAMPLE <br />® PRESERVED SAMPLE <br />Q GROUNDWATER LEVEL <br />OBSERVED FROM FIRST WET <br />SOIL SAMPLE IN BORING <br />V STATIC GROUNDWATER LEVEL <br />OVM ORGANIC VAPOR METER READING <br />IN PARTS PER MILLION BY VOLUME <br />PHOTO -IONIZATION DETECTOR READING <br />PID IN PARTS PER MILLION BY VOLUME <br />BLOW/FT. REPRESENTS THE NUMBER OF BLOWS OF <br />A 140 -POUND HAMMER FALLING 30 INCHES <br />TO DRIVE THE SAMPLER THROUGH THE LAST <br />12 INCHES OF AN 184NCH OR 244NCH PENETRATION. <br />WELL DESIGN <br />SAND PACK <br />EBENTONITE ANNULAR SEAL <br />® NEAT CEMENT ANNULAR SEAL <br />❑ BLANK CASING <br />® SLOTTED CASING <br />NR NOT RECORDED <br />NA NOT ANALYZED <br />DASHED LINES SEPARATING UNITS ON THE LOG <br />REPRESENT APPROXIMATE BOUNDARIES ONLY. <br />ACTUAL BOUNDARIES MAY BE GRADUAL. LOGS <br />REPRESENT SUBSURFACE CONDITIONS AT THE <br />BORING LOCATION AT THE TIME OF DRILLING <br />ONLY. <br />C!7�11 UNIFIED SOIL CLASSIFICATION SYSTEM <br />ER/ AND LOG OF BORINGS SYMBOL KEY <br />Shaping the Future <br />