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6. The EARTHWORK CONTRACTOR shall notify the OWNER at least 3 <br /> working days in advance of when the subgrade is completed and ready for <br /> as-built surveys. The OWNER will survey the top of the base and slope <br /> subgrade in accordance with Section 01410, SURVEYS. The survey shall <br /> provide coordinates and elevations of the subgrade surface at a minimum of <br /> 75-foot centers and delineating prominent features. The results of the <br /> survey will be provided to the QA/QC CONSULTANT within 2 days of the <br /> survey for approval prior to placing overlying materials. The QA/QC <br /> CONSULTANT shall have 2 working days to review survey results and <br /> may independently verify survey results. The time taken by the QA/QC <br /> CONSULTANT in checking and verifying the survey results will be <br /> considered included in the total calendar days allotted the EARTHWORK <br /> CONTRACTOR before liquidated damages are assessed. <br /> B. After completion of clay liner and subgrade fill, proof-roll the surface of the entire <br /> lined area with a loaded dump truck or similar heavy-wheeled equipment to detect <br /> soft or loose zones. Notify the QA/QC CONSULTANT prior to commencement <br /> of proof-rolling. If soft or loose zones are found, excavate the soft or loose <br /> material to a depth accepted by the QA/QC CONSULTANT, then fill with Clay <br /> Liner or General Earthfill, as appropriate. The Clay Liner or General Earthfill <br /> shall be compacted as specified for such fill. <br /> 3.9 CONSTRUCTION OF CLAY LINER <br /> A. General: <br /> 1. Clay Liner Material shall be processed to meet the requirements of Article <br /> 2.4 of this Specification. Exhibit A has been included to provide <br /> information on successful processing and placement procedures used for the <br /> construction of WMU D-01 at the Forward Landfill. The EARTHWORK <br /> CONTRACTOR shall have the option to determine construction procedures <br /> to be used, subject to the approval and acceptance testing by the QA/QC <br /> CONSULTANT. <br /> 2. The EARTHWORK CONTRACTOR shall process the Clay Liner Material <br /> suitable for the purpose intended. After processing, the Clay Liner Material <br /> shall be free from dry clods, roots, organic matter, frozen material, debris, <br /> rocks or stones larger than 1 inch, and other deleterious material. Clay <br /> Liner Material shall be thoroughly blended and compacted to provide a <br /> homogeneous material relatively uniform in gradation and moisture content. <br /> FORWARD LANDFILL 02300 <br /> 13 EARTHWORK <br />