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03/08/2008 13:24 FAX a010/041 <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR D!VlSIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> b Gw WEIIGRADED GRAVELS,GRAVEL-SAND <br /> CLEAN GRAVELS ; MIXTURES WITH LITTLE OR NO FINES <br /> GRAVELS WITH LITTLE ._.—. <br /> OR NO FINES <br /> ° POORLY-GRADED GRAVELS GRAVEL-SAND <br /> (Mom Ilan half of Dt Op MTXRIP,ES WITH LITTLE OR NO FINES <br /> worse fraction O <br /> is larger than <br /> the#4 sleve) a GM SILTY GRAVELS,GRAVEL-SILT,-NAD <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER — <br /> GRAINED 12%FINESGCCIJIX.YEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS MTURES <br /> (More than half Sw WELL-GRADED SANDS,SAND-GRAVEL <br /> of materialCLEAN SANDS MIXTURES WITH Lr1TLE OR NO FINES <br /> Is larger than SANDS WITH LITTLE <br /> the#20D shave) More than half of OR NO FINES <br /> warse fraction SP MIXTURES WITH SANDS, NOFI SAND-GRAVEL <br /> MIXTURES WITH LITTLE OR NO FINES <br /> is smal{er than <br /> the 114 slava) <br /> SM SILTY SANDS,SAND-GRAVEL-SILT MIXTURES <br /> SANDS WITH <br /> OVER 12% FINES <br /> SC CLAYEY SANDS.SANDGRAVEL GAY MIXTURES <br /> INORGANIC SILTS&VERY FINE SANDS. <br /> ML SILTY OR CLAYEY FINE SANDS, <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYSINORGANIC CLAYS OF LOW TO MEDIUM <br /> CL <br /> PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, <br /> "uid limit less than 50) SILTY CLAYS,LEAN CLAYS <br /> FINE — --------- <br /> GRAINED ORGANIC SILTS&ORGANIC SILTY GAYS <br /> SOILS OL OF LOW PLASTICr ' <br /> (More than half <br /> MH INORGANIC SILTS,MICACEOUS Oi� <br /> of matedal DIATOMACEOUS FINE SAND OF.5LT <br /> is smaller than — <br /> the#200 sieve) SILTS AND CLAYS <br /> INORGANIC CLAY$OF HIGH PLASTICITY.(Liquid limit greater than 50) FAT CLAYS <br /> ORGANIC CLAYS&ORGANIC SILT <br /> OF MEDIUM-TO-HIGH PLASTICn-Y <br /> HIGHLY ORGANIC SOILS FIT ORGANIC <br /> HUMUS.SWANIP SOILS WITH HIGH <br /> ORGANIC CONTEI,T <br /> UNIFIED SOIL CLASSIFICATION SYSTEMPLATE <br /> KLEIN f E L D R PROPOSED ASHTON PLACE SUBDIVISION <br /> o PETERS, CALIFORNIA r1 <br /> v <br /> J <br /> Drafted By: GDG Prc)eet No.: 23197.601 <br /> Date: 2IW2006 File Number, ST02G145 <br />