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<br />P:\Projects\0106.069 CC&V 2024 CQA\J-REPORTS\2024 Phase 3B Subgrade and Leak Detection ROC Report <br /> Page 9 <br />3.2. Earthworks Construction Quality Assurance <br />All earthwork activities for the VLF2 Phase 3 Stage B 2024 Subgrade and Leak Detection <br />project were performed in accordance with the design drawings and project specifications as <br />discussed in Section 2. The CQA Monitor observed, documented, and performed testing during <br />material placement. This included ensuring the proper materials were placed, fills were free of <br />deleterious materials, lift placement was performed uniformly and on a firm an unyielding <br />underlying layer, haulage traffic was spread across fill surfaces when practical, moisture <br />conditioning was performed uniformly with acceptable moisture content, the proper method <br />specification was used when applicable, and specified densities were achieved during field <br />testing. Earthworks laboratory and field testing and frequencies are summarized in Table 2. <br />The CQA Monitor checked ambient temperatures and logged the daily high and low <br />temperatures, maximum wind speeds and amount of precipitation in Table 3. <br />3.2.1. Owner Performed Structural Fill/High Compaction Backfill <br />VLF Phase 3 Stage B was constructed by placing 15,256 cy of Owner Placed Structural Fill <br />(HCBF). The particle size distribution and Atterberg limits testing frequencies were one <br />sample for every 50,000 cy. One HCBF sample was required to be tested for particle size <br />and Atterberg limits. One SF sample was tested with passing results. SF laboratory testing <br />is summarized in Table 4 and individual test results are presented in Appendix G. <br />No laboratory compaction testing was performed on the SF placed within the VLF Phase <br />3B, as all SF material contained more than 30 percent retained on the ¾-inch sieve. <br />Density was achieved by placing the material in accordance with the method compaction <br />specification used previously in VLF2 Phase 3. <br />3.2.2. Contractor Structural Fill <br />VLF2 Phase 3 Stage B Subgrade was constructed by placing 94,520 cy of SF. The particle <br />size distribution and Atterberg limits testing frequencies were one sample for every <br />50,000 cy. Two SF samples were required to be tested for particle size and Atterberg <br />limits. Two SF samples were tested with passing results. SF laboratory testing is <br />summarized in Table 5 and individual test results are presented in Appendix G. <br />No laboratory compaction testing was performed on the SF placed within the VLF Phase <br />3B, as all SF material contained more than 30 percent retained on the ¾-inch sieve. <br />Density was achieved by placing the material in accordance with the method compaction <br />specification presented in Appendix D. <br />3.2.3. Leak Detection Fill <br />VLF2 Phase 3 Stage B was constructed by placing 137 cy of Leak Detection Fill (LDF). The <br />particle size distribution and Atterberg limits testing frequencies were one sample for <br />every 10,000 cy. One LDF sample was required to be tested for particle size and Atterberg