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<br /> <br /> Forward Landfill WMU FU-23 02300 22 EARTHWORK <br />5. The EARTHWORK CONTRACTOR shall use low ground pressure <br />equipment to place the granular drainage material. A minimum thickness of <br />1 ft of material is required between a low ground pressure dozer (such as a <br />wide pad Caterpillar D-4 bulldozer or equivalent) and an underlying <br />geomembrane. A minimum thickness of 3 ft of material is required between <br />rubber-tired vehicles and underlying geosynthetics. In areas of heavy <br />vehicle traffic, such as access ramps, the material thickness should be at <br />least 3 ft. In any case, the following table shall be complied with during <br />construction: <br /> <br />Maximum <br />Equipment Ground Pressure <br />(psi) <br /> <br />Initial Lift Thickness <br />(ft) <br />< 5 0.5 <br />5 1.0 <br />10 1.5 <br />20 2.0 <br />>20 >3.0 <br /> <br /> 6. EARTHWORK CONTRACTOR is responsible for repairing any <br />geomembrane lining material damaged during GDM placement at no cost to <br />the OWNER. <br /> 7. After completion of the GDM layer, construction traffic shall be minimized <br />to that absolutely necessary for placement of the overlying geotextile and <br />Protective Operations Layer. No vehicles used for transporting the GDM or <br />coarse gravel from the borrow source shall be allowed on top of the placed <br />and compacted GDM layer except in areas where a minimum 12-inches of <br />protective operations layer and geotextile have been placed above the <br />GDM. <br /> 8. Placement of granular drainage materials on the geomembrane shall not <br />proceed when the ambient temperature is less than 40 degrees F or more <br />than 104 degrees F, unless approved by the QA/QC CONSULTANT. <br /> 9. Placement of granular drainage materials on the geomembrane shall be <br />halted when wrinkling of the geomembrane becomes excessive enough, in <br />the opinion of the QA/QC CONSULTANT, to damage the geomembrane. <br />The EARTHWORK CONTRACTOR will not be compensated for any costs <br />or delays resulting from this halt in Work and shall schedule granular <br />drainage material placement at times when wrinkling of the geomembrane, <br />in the opinion of the QA/QC CONSULTANT, is minimal. Approval by the <br />QA/QC CONSULTANT of appropriate times for GDM placement does not <br />absolve EARTHWORK CONTRACTOR of responsibility for repairing any <br />geomembrane lining material damages during GDM placement, at <br />EARTHWORK CONTRACTOR's sole expense. <br /> <br /> C. Compaction Requirements: Compact using a minimum of two passes of a low <br />ground pressure dozer (see Section 3.12.B.5), unless otherwise approved by the