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i UNIFIED SOIL CLASSIFICATION SYSTEM r USCS TYPICAL F MAJOR DIVISIONS SYMBOL DESCRIPTIONS ' GW WELL-GRADED GRAVELS,GRAVEL-SAND CLEAN GRAVELS : MIXTURES WITH LITTLE OR NO FINES j GRAVELS WITH LITTLE OR NO FINES 0O POORLY-GRADED GRAVELS,GRAVEL-SAND (More than half of o GP MIXTURES WITH LITTLE OR NO FINES coarse fraction is larger than the#4 sieve) ISM SILTY GRAVELS,GRAVEL-SILT-SAND GRAVELS MIXTURES COARSE WITH OVER GRAINED 12% FINES CLAYEY GRAVELS,GRAVEL-SAND-CLAY ' SOILS ` GC' MIXTURES k E (Mare than half S W WELL-GRADED SANDS,SAND-GRAVEL of material CLEAN SANDS of WITH LITTLE OR NO FINES is larger than SANDS WITH LITTLE I the#200 sieve) (More half alf of OR NO FINES coarse n ha f SP POORLY-GRADED SANDS,SAND-GRAVEL is smaller than MIXTURES WITH LITTLE OR NO FINES the#4 sieve) S M SILTY SANDS,SAND-GRAVEL-SILT MIXTURES SANDS WITH OVER 12% FINES SC CLAYEY SANDS,SAND-GRAVEL-CLAY MIXTURES r k 4 INORGANIC SILTS&VERY FINE SANDS, F M L SILTY OR CLAYEY FINE SANDS, CLAYEY SILTS WITH SLIGHT PLASTICITY SILTS AND CLAYSINORGANIC CLAYS OF LOW TO MEDIUM CL PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS FINE GRAINED — SOILS — OL ORGANIC SILTS&ORGANIC SILTY CLAYS xx OF LOW PLASTICITY (More than halt INORGANIC SILTS,MICACEOUS OR of material MH DIATOMACEOUS FINE SAND OR SILT is smaller than j the#200 sieve) SILTS AND CLAYS CH INORGANIC CLAYS OF HIGH PLASTICITY, (Liquid limit greater than 50) FAT CLAYS OH ORGANIC CLAYS&ORGANIC SILTS OF MEDIUM-TO-HIGH PLASTICITY i LOAMS UNDER USDA SOIL CLASSIFICATION SYSTEM, SOIL OF APPROXIMATELY EQUAL SANDISILT/CLAY 0 UNIFIED SOIL CLASSIFICATION SYSTEM PLATE K L E 1 N FELDER DSS COMPANY PROPOSED GRAVEL PIT (OX-96-1) N A- KOSTER ROAD FACILITY Drafted By: D. Ross Project No.: 20-2245-36.E02 TRACY, CALIFORNIA Y Date: 4/9/2001 File Number. 20224536 Copy.g"KI.W.Idw.Inc.200 ]f1]