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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 <br /> • <br /> 90 <br /> • 7- 1(1111 -. • <br /> 6-- 80 . <br /> • <br /> • <br /> •• <br /> i 70 . <br /> 0 <br /> Q. r <br /> ai .2360 <br /> o <br /> J <br /> o .o <br /> z <br /> o <br /> F 50 • <br /> m <br /> F <br /> z c • <br /> \CP <br /> • <br /> . <br /> w a40 • <br /> II :: <br /> O 10 <br /> z <br /> 0 <br /> • <br /> w 100 10 1 0.1 0.01 0.001 <br /> w <br /> Grain Size in Millimeters <br /> 6 <br /> z <br /> O <br /> Cobbles GravelSilt or Clay <br /> coarse fine coarse medium fine <br /> w <br /> O <br /> w <br /> 2 Point Depth Classification LL PL PI Cc Cu <br /> o • B-1 2.5 Silty SAND (SM) <br /> cw� m B-1 10.0 Silty SAND (SM) <br /> N A B-3 10.0 Silty SAND (SM) <br /> c <br /> w * B-4 7.5 Silty SAND (SM) <br /> 0 <br /> re <br /> a %Coarse %Fine %Coarse -%Medium %Fine <br /> Point Depth D100 D60 D50 D30 D10 Gravel Gravel Sand Sand Sand %Fines <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 /> w <br /> m B-1 10.0 19 0.205 0.131 0.0 3.8 2.3 10.0 36.5 38.0 <br /> 1- <br /> 8 A B-3 10.0 9.5 0.147 0.096 0.0 2.1 2.6 9.8 39.0 44.2 <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 /> O <br /> X <br /> n <br /> r. <br /> a Cc=D302/(D60*D10) To be well graded: 1 <Cc<3 and <br /> 0 <br /> s Cu =D60/D10 Cu>4 for GW or C,>6 for SW <br /> Proposed AD Systems Figure <br /> c,OTe5T Expansion Grain Size Test Data �I 0 <br /> 2201 100th Street SW I <br /> Everett,WA <br />