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• Verify that final earthfill surfaces are free of ruts, gouges, and other features that might <br />contribute to erosion and sediment run-off. <br />• During earthfill operations field verify lines, grades, and dimensions using hand-held <br />levels and inclinometers, range poles and measuring tapes. <br />• Coordinate with the Earthwork Contractor and Owner to perform verification surveys at <br />the completion of earthfill operations. Verify corrective action measures as determined <br />by verification surveys. Verification surveys will also be used to determine the limits of <br />earthfills for measurement and payment applications. Submit copy of verification <br />surveys to the Construction Manager. <br />3.4.4 Clay Liner, Clay Plug, and Clay Earthfill <br />• Perform visual and manual soil classifications (ASTM D2488) to verify that material <br />source is suitable for clay liner, clay plug, and clay earthfill. Perform classifications <br />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 clay materials. Perform tests at testing <br />frequencies specified in Section 3.2.2. <br />• Verify that clay materials are placed and compacted in accordance with the <br />Specifications. <br />• Perform nuclear density -moisture tests (ASTM D2922 and ASTM D3017) to verify that <br />each lift is compacted as required by the 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 clay 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 acceptable moisture is maintained to reduce desiccation of the clay liner <br />surface. <br />• Verify that the clay liner surface is free of ruts, gouges, and other features that might <br />damage overlying geosynthetics. <br />Page 22 0 <br />