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• to a density greater than or equal to 90 percent of maximum dry <br />density, as determined by the Standard Procter Compaction Test <br />(ASTM D-698) and having a moisture content of 12 to 22 percent. <br />A field density testing program should be conducted during <br />disposal operations to determine the actual dry density being <br />achieved. If the density achieved is not sufficient to permit <br />mobilizing of the design strength required for adequate slope <br />stability, modification to the compaction procedure or to the <br />disposal plan may be required. Since present methods of <br />disposal have produced acceptable test results, field density <br />tests can be extended to monthly. If the compaction procedures <br />continued to obtain consistent and acceptable test results, the <br />testing frequency could be extended further. If acceptable test <br />• results are not being consistantly achieved the test frequency <br />s::ould be increased. <br />The refuse should advance upward in nearly horizontal layers. <br />Runoff from the adjacent hill sides should be kept off the fill <br />areas by directing the runoff within the limits of the pile area, <br />above the present fill area, to the rock drain and outside of the <br />pile area by diversion ditches. <br />The refuse pile should be graded as shown on Figure 1 to prevent <br />the ponding of water on the surface of the pile. <br />It is expected that implementation of the guideline <br />specifications will produce a consistent, uniform fill which <br />meets the requirements for stability of the refuse pile. <br />• The final pile configuration assuming a 75-foot maximum height, <br />13 <br />