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2. Equipment used to place and compact the coarse gravel shall be not travel <br />directly on the underlying geomembrane. <br />3. The EARTHWORK CONTRACTOR shall use low ground pressure <br />equipment to place the coarse gravel. A minimum thickness of 1 ft of <br />material is required between a low ground pressure dozer (such as a wide <br />pad Caterpillar D-3 bulldozer or equivalent) and an underlying geoembrane. <br />A minimum thickness of 3 ft of material is required between rubber -tired <br />vehicles and underlying geosynthetics. In areas of heavy vehicle traffic, <br />such as access ramps, the material thickness should be at least 3 ft. In any <br />case, the following table shall be complied with during construction: <br />3 <br />0 <br />Maximum <br />Equipment Ground Pressure <br />(psi) <br />Initial Lift Thickness <br />(ft) <br />< 5 <br />0.5 <br />5 <br />1.0 <br />10 <br />1.5 <br />20 <br />2.0 <br />>20 <br />>3.0 <br />Method of dumping and spreading materials shall be approved by the <br />QA/QC CONSULTANT and shall ensure uniform distribution of the <br />material and prevent damage to the underlying geotextile and geomembrane <br />lining. Approval does not absolve the EARTHWORK CONTRACTOR of <br />responsibility for damage to underlying components. <br />Compaction of Coarse Gravel shall be accomplished by shovel -slicing <br />during dumping, and taking necessary precautions to prevent damage to <br />underlying geosynthetics. <br />C. Quality Control: <br />1. General: As the Coarse Gravel material is being placed, the QA/QC <br />CONSULTANT will be monitoring the construction activities and soil <br />properties. If acceptance tests conducted by the QA/QC CONSULTANT <br />indicate that the Coarse Gravel does not meet specified requirements, the <br />EARTHWORK CONTRACTOR shall terminate material placement until <br />corrective measures are taken. <br />2. Coarse Gravel Acceptance: Final acceptance of the Coarse Gravel will be <br />based on all tests made on completed Work or on samples of material taken <br />from the completed layer. Testing for final acceptance shall be performed <br />by the QA/QC CONSULTANT in accordance with these Specifications and <br />the CQA Manual. <br />Forward Landfill WMU FU -06 <br />02300 20 EARTHWORK <br />C <br />• <br />