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ameO <br />Weather data for the Phase 5 Berm Modification construction activities from the period of <br />June 2012 through August 2012 are presented in Table 2. <br />2.1 Underground Workings Remediation <br />The Phase 5 Berm Modification was constructed on previously placed fill. No underground <br />workings were encountered within the footprint of the Phase 5 Berm Modification. <br />2.2 Site Grading <br />Prior to SSF placement, Ames conditioned and compacted the subgrade surface of the fill <br />area. AMEC monitored the preparation of the subgrade and verified that it met project <br />specifications. <br />Ames graded existing slopes and placed SSF so that final slopes were no steeper <br />than 1.5H:1V (horizontal:vertical). In native ground, the in -situ material was scarified to a <br />depth of approximately 6 inches. SSF was compacted with a minimum of four passes by a <br />smooth drum vibratory compactor according to the project specifications. <br />Ames placed approximately 925 cubic yards of SSF for site grading in the Phase 5 Berm <br />Modification footprint. <br />2.3 Subgrade Preparation <br />Prior to SLF placement, Ames moisture conditioned and compacted the entire surface of the <br />Phase 5 Berm Modification with a smooth drum vibratory compactor according to the project <br />specifications. The quality of the finished surface was then maintained to the project <br />specifications until SLF was placed. <br />AMEC Environment & Infrastructure, Inc. <br />2000 S. Colorado Blvd 2 -1000 <br />Denver, CO 80222 <br />Tel 303 - 935 -6505 <br />Fax 303 - 935 -6575 www.amec.com <br />7 <br />