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MAJOR DIVISIONS LETTER TYPICAL DESCRIPTION <br />SYMBOL <br />IClean (`jN/ Well•graded gravels, gravel•sand mixWres, little or no <br />GRAVELS Gravels fnes. <br />� °' less than <br />J oi l Gp Poorlygraded gravels, gravel-sand mixlures, lillle or <br />Q m N More lhan 5% fines) no fines. <br />� �'y 50% of coa�se Silty gravels, gravel-sand-sill mixtures, non-plaslic <br />traction is GM r�es. <br />� � > larger than No. Gravels <br />w�°7 4 sieve with fines <br />Q�`� (�(; Clayey gravels, grevel•sand-clay mixlures, plaslic fines. <br />o� <br />��N � Clean SW Well•graded sands, gravolly sands, litlle or no fines. <br />o SANDS Sands _. <br />less than <br />�W m Z ( SP Poorly-graded sands or gravelly sands, lillle or no <br />� c More than 5% fiines) fines. <br />Q y� 50°/a of coarse — <br />Q o fraCtion i5 S(� Silly sands, sand-silt mixlures, non-plastic fines. <br />U� smaller lhan Sands � <br />No. 4 sieve with fines <br />SC "layey sands, sancl•clay mixtures, plasllc Mes. <br />Inorganic sills, �ock flour, clayey sills with slic�h� <br />J`�o SILTS AND CLAYS M� plasticity. <br />va <br />O � N � CL Inore�anic clays of low to medium plaslicity, (lean clay). <br />E o� � Liquid limit is less than 50% —.— <br />p � Z N QL Organic silts and organic clays of low plAsticity. <br />Z � m m -- <br />Q e �� MH Inorganic sills, elaslic. <br />� L a��� SILTS AND CLAYS <br />C� — — <br />W � E (',�-{ Inorganic cl;ye of high plaslicify, fal clays. <br />z� v� Liquid limil is grealer ihan 50% <br />�- �H Organic clays of high plaslicity. <br />HIGHLY ORGANIC SOILS PT Peat. <br />DEFINITION OF TERMS AND SYMBOLS <br />rn Slandard Penetration <br />W Densitv Resistance in BlowslFool I 2� DUTSIDE DIAMETER SPLIT <br />SPOON SAMPLER <br />� Very Ioose 0-4 � 2.4' INSIDE DIAMETER RING SAMPLER <br />� Loose 4-10 �- OR SHELBY TUBE SAMPLER <br />O Medium dense 10-30 1 yyATER LEVEL DATE <br />Dense 30-50 ( 1 <br />v Very dense >50 <br />Tr TORVANE READINGS, Isf <br />Slandard Penef�alion PP PENETROMET[R READING, Lsf <br />W Consislencv Resistance in Blows/Foot DD DRY DENSI7Y, pounds per cubic lool <br />� Very sofl 0-2 LL LIQUID LIMIT, percent <br />w Soft 2-0 <br />� Medium sliff q-8 PI PLASTIC INDEX <br />U Velry sliH g�gZ N STANDARD PENETRATION, blows per foot <br />Hard >32 <br />:� ' Terra UNIFIED SOIL CLASSIFICATION SYSTEM <br />��:-.�.-��?� RETAIL BUILDING <br />. Associates, It1C. EVERETT, WASHINGTON <br />"—"� Consullants in Geotechnicul Engineering <br />Geology antl <br />Environmental Earth Sciences PfOj. No. T-6366 D3te SEPT 2009 Figu�e A-1 <br />Y' <br />