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4. Delays caused by inadequate stockpiling operation, as determined by the QA/QC CONSULTANT, shall not be cause for an extension in the EARTHWORK CONTRACTOR's completion dates or cause for EARTHWORK CONTRACTOR change orders and all additional cost associated shall be at the EARTHWORK CONTRACTOR's sole expense. 3.7 SUBGRADE FILL A. Place Subgrade Fill at locations shown on the Construction Drawings or as directed by the QA/QC Consultant. Place material in lifts not exceeding 8-inch uniform thickness. Each lift shall be compacted to a relative compaction of not less than 90 percent (ASTM D1557). B. During all compacting operations, maintain optimum practicable moisture content required for compaction purposes in each lift of fill. Maintain uniform moisture content throughout the lift. At the time of compaction, the water content of the material shall be within 4 percent of the optimum moisture content. C. Do not attempt to compact fill material that contains excessive moisture. Aerate material by blading, discing, harrowing, or other methods to hasten the drying process. 3.8 GRADING AND SUBGRADE PREPARATION A. This Work shall consist of fine grading and preparation of lining subgrade for the construction of the base and side slope lining. The lining subgrade is further defined as those areas and surfaces within the subgrade upon which lining materials are to be placed. 1. Fine grading shall be performed to grade the subgrade to within the tolerances specified in Section 01410, SURVEYS. 2. The prepared subgrade surface shall be smooth and free of major irregularities. The subgrade should contain no exposed particles larger than 3 inches or other surface irregularities which, in the opinion of the QA/QC CONSULTANT, will damage the overlying GCL, 60-mil HDPE geomembrane, or Geogrid. 3. Overexcavation below the established lining subgrade by the EARTHWORK CONTRACTOR shall, at his expense, be backfilled with Clay Liner Material or General Earthfill Material as directed by the QA/QC CONSULTANT. 4. Once completed, all traffic shall be kept off the lining subgrade. 5. The lining subgrade shall be maintained in the finished condition until the first succeeding course is placed. Any damage to the prepared lining subgrade by the EARTHWORK CONTRACTOR shall be repaired, at the EARTHWORK CONTRACTOR's expense. Any damage to the prepared lining subgrade by the GEOSYNTHETICS CONTRACTOR, including those caused by a delay of the GEOSYNHETICS CONTRACTOR, shall be at the GEOSYNTHETICS CONTRACTOR's expense. 0 Forward Landfill WMU FU-04 02300 12 EARTHWORK