Laserfiche WebLink
ameo <br />• <br />The southern Closure Drain resides over the Phase IVa VLF. At closure this area will be <br />punctured and allowed to drain into the Phase IVa VLF. <br />4.2.4 Subgrade Preparation <br />AMEC monitored subgrade preparation, including verification that Ames compacted the <br />subgrade with a smooth drum vibratory compactor. AMEC verified that Ames removed <br />protruding rocks from the subgrade surface prior to SLF placement. AMEC verified that the <br />subgrade surface was moisture conditioned, smooth, and unyielding prior to SLF placement. <br />4.2.5 Site Grading <br />AMEC monitored site grading. In areas where the SF contained less than 30 percent by <br />weight larger than three-quarter-inch particle size, nuclear density tests were conducted to <br />verify density and moisture content. A total of 68 moisture-density tests were conducted on <br />128,400 cubic yards resulting in a testing frequency of one per 1,888 cubic yards, exceeding <br />the minimum testing frequency of one per 2,000 cubic yards. <br />The majority of the SF contained more than 30 percent by weight larger than <br />three-quarter-inch particle size, and was placed by method specification (per Specification <br />2200 Section 3.06). <br />AMEC verified that the SF 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 SF <br />was placed for slope reduction, AMEC verified that Ames scarified in-situ materials prior to <br />fill placement. AMEC verified that Ames made a minimum of four passes with the SDVR <br />compactor. <br />0 <br />AMEC Earth & Environmental, 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 33