Laserfiche WebLink
October 2001 -18- 003-2182.004 <br /> verified that the subgrade surface was smooth and unyielding prior to Soil Liner Fill <br /> placement. <br /> 4.2.2 Site Grading <br /> Golder monitored site grading. Due to the gradation of the Structural Fill used for site <br /> grading, the compaction of the fill could not always be tested with a nuclear density gauge <br /> (that is, the fill had greater than 30 percent by weight larger than three-quarter inch particle <br /> size). Golder verified that the maximum particle size of the fill did not exceed 24 inches, and <br /> that lifts were no thicker than one and one-half times the maximum particle size. When <br /> Structural Fill was placed for slope reduction, Golder verified that Ames scarified in situ <br /> materials prior to fill placement. Golder verified that Ames made a minimum of four passes <br /> with the smooth drum vibratory compactor when fill could not be tested with the nuclear <br /> density gauge. During cold weather placement of Structural Fill, Golder monitored ambient <br /> air temperature. If ambient air temperature- fell below 32°F for an hour before or during <br /> Structural Fill placement, Golder monitored the fill temperature in accordance with the <br /> specifications as discussed in Section 4.2.4 of this report. No frozen fill was placed. <br /> Structural Fill temperature monitoring data is presented in Appendix H-2. <br /> Golder performed a total of 29 in-place moisture-density tests of Structural Fill. Golder <br /> compared results of the field moisture content and density tests to the Proctor dry density and <br /> optimum moisture content values of material with similar gradation and plasticity <br /> characteristics. Proctor dry density and optimum moisture content values for samples with <br /> greater than 10 percent plus three-quarter-inch material were corrected according to <br /> ASTM D4718 to facilitate direct comparison to nuclear density values. The moisture-density <br /> testing frequency of approximately one test per 2,000 cubic yards met the minimum specified <br /> testing frequency of one test per 2,000 cubic yards. Nuclear density tests performed on <br /> Structural Fill are summarized in Table 9. Two of the 29 nuclear density tests failed to meet <br /> specifications. These areas were reworked, recompacted, and retested to meet specifications. <br /> The number of retests were not used to determine the testing frequency. <br /> 1\00\2182\EXTERNAL POND RPTTMALDOC Golder Associates <br />