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• Coordinate with the Earthwork Contractor and Owner to perform excavation verification surveys upon completion of excavating operations. Verify corrective action measures as determined by verification surveys. Verification surveys will also be used to determined limits of excavation for measurements and payment applications. Submit copy of verification surveys to the Construction Manager. 3.4.3 General Earthfill and Subgrade Fill • Verify that construction staking is performed before work and that survey bench marks with elevations are secured outside the work area. • Perform visual and manual soil classifications (ASTM D2488) to verify that material source is suitable for earthfills. Verify that the material is free of organic and oversized materials. Perform classifications continually during excavation of borrow materials. • Perform moisture -density relationship testing (ASTM D1557) to determine the maximum dry density and optimum moisture content of earthfill materials. Perform tests at testing frequencies specified in Section 3.2.2. • Verify that earthfill materials are placed and compacted in accordance with the Specifications. If a sheepsfoot compactor is not used, verify that the top of each compacted lift is scarified before placing the subsequent lift. • Perform nuclear density -moisture tests ASTM D2922 and ASTM D3017 to verify that t3' ( ) fY each lift is compacted as required by the technical specifications. Perform tests at testing frequencies specified in Section 3.2.2. • Verify that soil materials that are too wet for proper compaction per Specifications are properly aerated and processed to bring the moisture content of the material into the acceptable range of the optimum moisture content. • Verify that earthfill soils that are too dry for proper compaction per Specifications are properly moisture conditioned and processed to bring the moisture content into the acceptable range of the optimum moisture content. • Verify that desiccated earthfills are properly repaired or removed before placing subsequent lifts. • Verify that final earthfill surfaces are free of ruts, gouges, and other features that might contribute to erosion and sediment run-off. • During earthfill operations field verify lines, grades, and dimensions using hand-held levels and inclinometers, range poles and measuring tapes. Page 21 •