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' Unified Soil Classification System <br /> ���aan GW Well graded gravels or gravel-sand mixtures, <br /> little or no fines <br /> Poorly graded gravels or gravel-sand mixtures, <br /> Gravels GP little or no fines <br /> d (More than half of <br /> � 1j.�, <br /> coarse fraction> GM Sandy gravels, gravel-sand-sift mixtures <br /> ' to S no 4 sieve size) <br /> Q3A GC Clayey gravels,gravel-sand-silt mixtures <br /> 0 <br /> Lb Aww w <br /> SW Well graded sands or gravelly sands,little or no fines <br /> 2 w .. <br /> Ca <br /> of Sands' t SP Poorly graded sands or gravelly sands, little or no fines C.1 2 (More than half of <br /> o coarse fraction< f I I <br /> E no 4 sieve size) {[1,if I I SM Silty sands,sand-silt mwures <br /> I <br /> SC Inorganic sifts and very tine sands, rock flour, silty <br /> or clayey fine sands or clayey sifts with slight plasticity <br /> Inorganic silts and very fine sands, rock flour, silty <br /> ML fine sands or clayey silts with slight plasticity <br /> ' No Sifts and Clays CL Inorganic clays of low to medium plasticity, gravelly <br /> o 2 LL- <50 days, sandy clays, lean days <br /> rn 0 <br /> Z <br /> 'D v OL Organic silts and organic silty clays of low plasticay <br /> co <br /> 2 a Inorganic silts, micaceous or diatomaceous fine sandy <br /> (9 MH or sihy soils, eleastic silts <br /> ' M Silts and Clays <br /> LL = a 50 CH Inorganic sifts of high plastictty,fat days <br /> m <br /> a` ..... <br /> ' E OH Organic clays of high plasticity,organic silty clays, <br /> organic sifts <br /> Highly Organic Soils Pt Peat and other highly organic soils <br /> ' Grain Size Chart Sample Designation <br /> ' Range of Grain Sizes <br /> Classification US Standard Gain Size Onve Sample interval <br /> Selve Size In Millimeters <br /> ' Boulders Above 12' Above 305 <br /> Cobbles 12"to 3" 305 to 76 2 Continuous Core <br /> Sample Interval <br /> Gravel 3"to No 4 76 2 to 7 76 <br /> ' coarse 3-to 3/4- 762 a 4 76 <br /> fine 3/4'w No 4 19 1 n4 76 f=irst Encountered Water(dunng drilling) <br /> Sand No 4 to No 200 4 76 to 0 074 <br /> ' coarse NO 4 to NO i 0 4 7610 2.00 <br /> mecum No 1011 NO 40 2A0 a0420 Stabdized Water Elevation (711191) <br /> fine No 40 b No 200 0 42010 OA74 <br /> ' Slit and Clay Below No 200 Below 0 074 <br /> SEACOR <br />