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Bore ID: I Sample Depth: <br /> ASTM D448 Size No. 9 <br /> Soil Soil <br /> Sieve Diameter Passing Passing <br /> Number (mm) Upper Lower <br /> (%) (%) <br /> 3/4" 19.050 100.00% 100.00% <br /> 1/2" 12.700 100.00% 100.00% <br /> 3/8" 9.525 100.00% 100.00% <br /> No. 4 4.750 85.00% 100.00% <br /> No. 8 2.000 10.00% 40.00% <br /> No. 16 0.600 0.00% 10.00% <br /> No. 50 0.150 0.00% 5.00% <br /> No. 100 0.075 0.00% 0.00% <br /> No. 200 0.420 0.00% 0.00% <br /> Upper Lower <br /> mm inch mm inch <br /> D15: 2.20 0.087 0.75 0.030 <br /> D5o: 3.20 0.126 2.40 0.094 <br /> D85: 3.17 0.125 1.19 0.047 <br /> After some iterative testing of other potentially suitable filter materials, ASTM 33, <br /> D448 No. 9 was selected. The chart below (Amen Cell 1 Drain Design) plots the <br /> grain size distribution of the upper and lower limits of ASTM 33 D448 no. 9 filter <br /> material along with the 3 boring samples. The chart shows a reasonable portion <br /> of overlap between the grain size distribution of the samples and the range of <br /> distributions of the filter materials. <br /> Amen Aggregate Resource <br /> Specific Exhibits <br /> Page 47 of 84 <br />