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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> - GW WELL GRADED GRAVELS GRAVEL SAND <br /> CLEAN GRAVELS == MIXTURES WITH LITTLE OR NO FINES <br /> WITH LITTLE <br /> GRAVELS OR NO FINES — GP POORLY GRADED GRAVELS GRAVEL-SAND <br /> ' (More than half of MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction <br /> is larger than - GM SILTY GRAVELS GRAVEL SILT SAND <br /> the #4 sieve) GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINES GC CLAYEY GRAVELS GRAVEL SAND CLAY <br /> SOILS MIXTURES <br /> (More than half <br /> WELL GRADED SANDS SAND GRAVEL <br /> of material CLEAN SANDS = SW <br /> Is larger than MIXTURES WITH LITTLE OR NO FINES <br /> - <br /> I` the #200 sieve) WITH LITTLE <br /> SANDS OR NO FINES SID POORLY GRADED SANDS SAND GRAVEL <br /> (More than half of MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction <br /> is smaller than SM SILTY SANDS SAND GRAVEL SILT MIXTURES <br /> the #4 sieve► SANDS WITH <br /> OVER 12% FINES <br /> SC CLAYEY SANDS SAND GRAVEL CLAY MIXTURES <br /> ' INORGANIC SILTS&VERY FINE SANDS <br /> ML SILTY OR CLAYEY FINE SANDS <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYS INORGANIC CLAYS OF LOW TO MEDIUM <br /> CL PLASTICITY, GRAVELLY CLAYS SANDY CLAYS <br /> (Liquid limit less than 50) SILTY CLAYS LEAN CLAYS <br /> FINE <br /> GRAINED OL ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> SOILS OF LOW PLASTICITY <br /> (More than half INORGANIC SILTS MICACEOUS OR <br /> of material MH DIATOMACEOUS FINE SAND OR SILT <br /> Is smaller than <br /> the #200 sieve) SILTS AND CLAYS INORGANIC CLAYS OF HIGH PLASTICITY <br /> (Liquid lima greater than 50) CH FAT CLAYS <br /> OH ORGANIC CLAYS&ORGANIC SILTS <br /> Of MEDIUM TO HIGH PLASTICITY <br /> �I UNDER USDA SOIL CLASSIFICATION SYSTEM <br /> LOAMS All <br /> SOIL OF APPROXIMATELY EQUAL SANDISILT/CLAY <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> KIK L E I N F E L D E R <br /> 1 MANTECA UNIFIED SCHOOL DIST <br /> o Drafted 8y DWA Project No 20-1131-40 E01 2901 E LOUISE AVE A- <br /> w Date 11/10/98 FIIe Number MANTECA, CALIFORNIA <br /> X <br /> Copynght Klemfelder Inc 1999 <br />