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I <br /> 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 1 <br /> 100 I I i I I I I I I I I I I I <br /> 90 : I <br /> 80 • <br /> • <br /> 70 .. . <br /> w <br /> N <br /> CO L <br /> 60 <br /> ��n <br /> aOLL 50z "C"_� Et)40 ' <br /> z • i <br /> . <br /> cS <br /> U <br /> m 30 \t` I <br /> z <br /> 0 <br /> O 20I <br /> z <br /> O 10 <br /> 5 • <br /> I <br /> 0 . <br /> 0 <br /> z 100 10 1 0.1 0.01 0.001 <br /> o) Grain Size in Millimeters <br /> o I <br /> a Cobbles Gravel Sand Silt or Clay <br /> u>, coarse fine coarse medium fine <br /> o <br /> I <br /> to <br /> o <br /> Point Depth Classification LL PL PI Cc C, <br /> LL <br /> w • B3 2.5 Gravelly SAND (SP) 0.23 25.99 I <br /> o <br /> TO <br /> m B3 7.5 Slightly gravelly SAND (SP) 0.46 7.45 <br /> F A B4 7.5 Very Gravelly SAND (SP) 0.23 22.47 <br /> o <br /> o * B4 15.0 Slightly gravelly SAND (SP) 0.75 4.18 I <br /> 0 <br /> a. <br /> Point Depth D90D60D50D30D %Coarse %Fine %Coarse "%Medium %Fine %Fines <br /> o p 10 Gravel Gravel Sand Sand Sand <br /> 2 • B3 2.5 15.544 2.76 1.101 0.261 0.106 0.0 28.1 11.0 16.2 36.8 2.9 1 <br /> o <br /> E I B3 7.5 0.656 0.352 0.164 0.088 0.0 11.7 8.2 14.8 49.8 4.7 <br /> w <br /> o A B4 7.5 27.238 2.259 0.722 0.229 0.101 20.3 13.3 7.5 15.3 40.5 3.2 <br /> ct <br /> o * B4 15.0 4.627 0.355 0.269 0.15 0.085 0.0 5.7 4.1 19.5 60.9 5.7 1 <br /> X <br /> o <br /> to <br /> CC= D3021(D60* D10) To be well graded: 1 < Cc, <3 and I <br /> Cu = D60/D10 C, >4 for GW or C, >6 for SW <br /> North Puget Sound Behavioral Figure I <br /> CC ole 5T Health Treatment Center Grain Size Test Data 1 0 <br /> Everett,Washington I <br /> I <br />