Laserfiche WebLink
0 3.7 SUBGRADE FILL <br />A. Place Subgrade Fill at locations shown on the Construction Drawings or as <br />directed by the QA/QC Consultant. Place material in lifts not exceeding 8 -inch <br />uniform thickness. Each lift shall be compacted to a relative compaction of not <br />less than 90 percent (ASTM D1557). <br />B. During all compacting operations, maintain optimum practicable moisture content <br />required for compaction purposes in each lift of fill. Maintain uniform moisture <br />content throughout the lift. At the time of compaction, the water content of the <br />material shall be within 4 percent of the optimum moisture content. <br />C. Do not attempt to compact fill material that contains excessive moisture. Aerate <br />material by biading, discing, harrowing, or other methods to hasten the drying <br />process. <br />3.8 GRADING AND SUBGRADE PREPARATION <br />A. This Work shall consist of fine grading and preparation of lining subgrade for the <br />construction of the base and side slope lining. The lining subgrade is further <br />defined as those areas and surfaces within the subgrade upon which lining <br />materials are to be placed. <br />1. Fine grading shall be performed to grade the subgrade to within the tolerances <br />specified in Section 01410, SURVEYS. <br />2. The prepared subgrade surface shall be smooth and free of major irregularities. <br />The subgrade should contain no exposed particles larger than 3 inches or other <br />surface irregularities which, in the opinion of the QA/QC CONSULTANT, <br />will damage the overlying GCL, or 60 -mil HDPE geomembrane. <br />3. Overexcavation below the established lining subgrade by the EARTHWORK <br />CONTRACTOR shall, at his expense, be backfilled with Clay Liner Material <br />or General Earthfill Material as directed by the QA/QC CONSULTANT. <br />4. Once completed, all traffic shall be kept off the lining subgrade. <br />5. The lining subgrade shall be maintained in the finished condition until the first <br />succeeding course is placed. Any damage to the prepared lining subgrade by <br />the EARTHWORK CONTRACTOR shall be repaired, at the EARTHWORK <br />CONTRACTOR's expense. Any damage to the prepared lining subgrade by <br />the GEOSYNTHETICS CONTRACTOR, including those caused by a delay <br />of the GEOSYNHETICS CONTRACTOR, shall be at the <br />GEOSYNTHETICS CONTRACTOR's expense. <br />Forward Landfill WMU FU -06 <br />02300 13 EARTHWORK <br />