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Unified Soil Classification System <br /> GW <br /> Well graded gravels or grave; sand mixtures <br /> 14t1e or no lines <br /> w Poorly graded gravels or gravel sand mixtures <br /> a Gravels GP tittle or no fines <br /> > M" <br /> Cn y (tutor© than hat[at i } <br /> coarse fractmn> J1 1 G� Sandy gravels grave[ sand sift mrxiures <br /> 0" no 4 sieve size} I` <br /> � o <br /> t�z <br /> a � GC Clayey gravels gravel-sand-silt mixtures <br /> cp Z5 <br /> C7 o SW Well graded sands or gravelly sands Irtile or no fines <br /> pC, c <br /> L Sands SP Poorly graded sands or gravelly sands little or no fines <br /> U m (More than half ofh r" <br /> O coarse fracoon< I I 1 <br /> no 4 sieve sue) I t t l l l l SM Silty sands,sand-silt mixtures <br /> SG Inorganic silts and very tine sands rack(bur silty <br /> _ _ or clayey fine sands or clayey sifts with slight plasticity <br /> MLInorganic sifts and very fine sands rock Ebur silty <br /> fine sands or clayey sats with slight plasticity <br /> N o Slits and Clays Inorganic clays of low to medium plasticity gravelly <br /> N LL= < 50 CL clays,sandy clays lean days <br /> O o <br /> (J]z <br /> 'o v OL Organic sifts and organic silty clays of low plasticity <br /> a�— <br /> � o <br /> o �H Inorganic sifts micaceous or diatomaceous fine sandy <br /> or silty soils,eleastic silts <br /> Q7 L <br /> SIits and Clays <br /> LL= i 50 CH Inorganic sifts of high plasticrty,fat days <br /> LD <br /> E `:`:`:`:`: Organic days of high plasticity,organic silty clays, <br /> OH <br /> organic sifts <br /> Highly Organic Solis Pt Peat and other highly organic sods <br /> Grain Size Chart Sample Designation <br /> Range of Grain Sizes <br /> Classification U-S Standard Gain Size Drive Sample Interval <br /> Selve Size In M111[meters <br /> Boulders Above 12' Above 305 <br /> Continuous Core <br /> Cobbles 12'to T 305 to 76 2 Sample Interval <br /> Gravel T to No 4 762 to 7 76 <br /> coarse a,to 314- 76.2 rp 4 76 <br /> fine 314-to No 4 19 1 to 4 76 First Encountered Water (during drilling) <br /> Sand No 4 to No 200 4 76 to 0 074 <br /> coarse No 4 m No 10 4 16 10 200 <br /> medium Na 10taNo 40 2-00m042G Stabilized Water Elevation (7/1/91) <br /> Ful No 40 w No 206 0 420 M 01574 — <br /> Sift nd Clay Below No 200 Below 0 074 <br /> ,C" ICOR <br />