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C7 <br />Coordinate with the Earthwork Contractor and Owner to perform excavation verification <br />surveys upon completion of excavating operations. Verify corrective action measures as <br />determined by verification surveys. Verification surveys will also be used to determined <br />limits of excavation for measurements and payment applications. Submit copy of <br />verification surveys to the Construction Manager. <br />3.4.3 General Earthfill and Subgrade Fill <br />• Verify that construction staking is performed before work and that survey bench marks <br />with elevations are secured outside the work area. <br />• Perform visual and manual soil classifications (ASTM D2488) to verify that material <br />source is suitable for earthfills. Verify that the material is free of organic and oversized <br />materials. Perform classifications continually during excavation of borrow materials. <br />• Perform moisture -density relationship testing (ASTM D1557) to determine the maximum <br />dry density and optimum moisture content of earthfill materials. Perform tests at testing <br />frequencies specified in Section 3.2.2. <br />• Verify that earthfill materials are placed and compacted in accordance with the <br />AWIL Specifications. If a sheepsfoot compactor is not used, verify that the top of each <br />compacted lift is scarified before placing the subsequent lift. <br />• Verify that general earthfill placed around HDPE tanks is appropriately compacted. Hand <br />held compaction equipment may be necessary to obtain adequate compaction around <br />HDPE tanks. <br />• Perform nuclear density -moisture tests (ASTM D2922 and ASTM D3017) to verify that <br />each lift is compacted as required by the technical specifications. Perform tests at testing <br />frequencies specified in Section 3.2.2. <br />• Verify that soil materials that are too wet for proper compaction per Specifications are <br />properly aerated and processed to bring the moisture content of the material into the <br />acceptable range of the optimum moisture content. <br />• Verify that earthfill soils that are too dry for proper compaction per Specifications are <br />properly moisture conditioned and processed to bring the moisture content into the <br />acceptable range of the optimum moisture content. <br />• Verify that desiccated earthfills are properly repaired or removed before placing <br />subsequent lifts. <br />is Page 21 <br />