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U.S.SIEVE OPENING IN INCHES I U.S.SIEVE NUMBERS I HYDROMETER <br /> 6 4 3 2 1.5 1 3/4 1/23/8 3 4 6 810 1416 20 30 40 50 60 100140200 <br /> 100 I I I I I ' I I I I i I I I <br /> • <br /> 90 ®' <br /> co • <br /> • <br /> 15 80 • <br /> 3 • <br /> w t• <br /> N <br /> o _ `i \ <br /> CL t <br /> CO -5 60 <br /> o <br /> o <br /> z <br /> o .50 <br /> u • <br /> . <br /> z : <br /> w • <br /> . \iiil\ <br /> a40 <br /> w ;\I <br /> vi • <br /> w 30 • <br /> co <br /> > <br /> N <br /> 0 <br /> 20 <br /> W <br /> 0 <br /> ✓ <br /> O. 10 <br /> 0 <br /> 0 <br /> K <br /> = 100 10 1 0.1 0.01 0.001 <br /> co Grain Size in Millimeters <br /> LL <br /> co <br /> z <br /> o <br /> Cobbles Gravel Sand Silt or Clay <br /> a coarse fine coarse medium fine <br /> w <br /> 0 <br /> Point Depth Classification LL PL PI Cc Cu <br /> o • B-1 2.5 Silty SAND (SM) <br /> ce4 I B-1 10.0 Silty SAND (SM) <br /> g <br /> i, A B-3 10.0 Silty SAND (SM) <br /> o <br /> w * B-4 7.5 Silty SAND (SM) <br /> 3 <br /> cc <br /> I; Point Depth D D D D D %Coarse %Fine %Coarse _%Medium %Fine %Fines <br /> § <br /> p 10o so 50 3o 10 Gravel Gravel Sand Sand Sand <br /> o • B-1 2.5 4.75 0.142 0.096 0.0 0.0 2.0 9.4 42.7 44.3 <br /> ui <br /> w I B-1 10.0 19 0.205 0.131 0.0 3.8 2.3 10.0 36.5 38.0 <br /> w A B-3 10.0 9.5 0.147 0.096 0.0 2.1 2.6 9.8 39.0 44.2 <br /> 3 <br /> a * B-4 7.5 9.5 0.206 0.143 0.058 0.0 1.8 2.6 12.0 44.2 34.4 <br /> 0 <br /> r <br /> a Cc=D3021(D60*D10) To be well graded: 1 <Cc<3 and <br /> CO <br /> 4 Cu=D60/D10 Cu>4 for GW or Cu>6 for SW <br /> Proposed AD Systems Figure <br /> oeoTe5T Expansion Grain Size Test Data 1 O <br /> 2201 100th Street SW <br /> Everett,WA <br />