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<br /> Page 18 <br />levels and inclinometers, range poles and measuring tapes. <br /> <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 /> <br /> <br />3.4.4 Subgrade Preparation <br /> <br /> <br /> Verify that grade control construction staking is performed prior to work. <br /> <br /> Verify that angular or sharp rocks, and other debris that could damage the geomembrane <br />are removed from the surface of the subgrade. Verify that the subgrade is free of <br />irregularities and is steel drum rolled smooth prior to geosynthetic placement. <br /> <br /> Verify that the final surface provides continuous and intimate contact with the overlying <br />geosynthetic. <br /> <br /> Coordinate with the Earthwork Contractor and Owner to perform subgrade verification <br />surveys upon completion of the subgrade preparation. Verify corrective action measures <br />as determined by the verification surveys. Verification surveys will also be used to <br />determine the limits of the subgrade preparation for measurement and payment <br />applications. Submit copy of verification surveys to the Construction Manager. <br /> <br />3.4.5 Granular Drainage Material <br /> <br /> Review the Contractor’s approved work plan of proposed methods to place granular <br />drainage material over geosynthetic installations. Determine and note corrective action <br />items if applicable. <br /> <br /> Perform soil tests to verify that the granular drainage material is in compliance with <br />material gradation and permeability requirements of the Specifications. Perform tests at <br />testing frequencies specified in Section 3.2.2. <br /> <br /> Monitor placement operations to verify that low ground pressure equipment is used in <br />accordance with the Specifications and that underlying geosynthetics installations are not <br />damaged during placement operations. Mark damaged geosynthetics and verify that <br />damage is repaired. <br /> <br /> <br />