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Section 02200 <br />Earthworks <br />S: \Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc <br />ame <br />excessive gaps are left between successively dumped loads of materials. The fill shall be <br />leveled prior to compaction by means of a dozer or grader, or other suitable approved <br />equipment, to obtain a surface free from depressions. <br />7. Except in areas approved by MANAGER and CERTIFYING ENGINEER where space <br />is limited or otherwise specified, CONTRACTOR shall place fill by routing the hauling <br />and spreading units approximately parallel to the axis of the fill. As far as practical, hauling <br />units shall be so routed that they do not follow in the same paths, but split their tracks <br />evenly across the surface of the fill to enhance compaction. <br />8. CONTRACTOR shall apply water required for moisture conditioning on the fill or in the <br />borrow areas. <br />CONTRACTOR shall maintain fill materials within the moisture content range required to <br />permit proper compaction to the specified density with the equipment being used. The <br />moisture content of the fill materials, prior to and during compaction, shall be uniform <br />throughout each layer of the material. <br />Prior to mixing of wet and dry material on the fill to obtain the proper moisture content, <br />approval shall be obtained from CERTIFYING ENGINEER. Mixed material shall have a <br />uniform distribution of the moisture content prior to placement on the subsequent lift. <br />When materials spread on the fill are too dry for proper compaction, CONTRACTOR <br />shall spray water on each layer of the fill and shall work the moisture into the fill by <br />harrowing or other approved means, until a uniform distribution of moisture is obtained. <br />Material that is too wet for proper compaction, as determined by CERTIFYING <br />ENGINEER, shall be removed from the fill and/or spread out and permitted to dry, assisted <br />by disking and harrowing or mixing in dry material when permitted by CERTIFYING <br />ENGINEER, if necessary, until the moisture content is reduced to an amount suitable for <br />obtaining the specified degree of compaction, at no cost to CC &V. <br />9. After each layer of fill material has been placed, spread, and moisture- conditioned, the layer <br />shall be compacted by passing compaction equipment over the entire surface of the layer a <br />sufficient number of times to obtain the required density, as specified herein. <br />Compaction shall be accomplished with equipment and by methods approved by <br />CERTIFYING ENGINEER. If such equipment or methods are found unsatisfactory for <br />the intended use, CONTRACTOR shall replace the unsatisfactory equipment with other <br />types or adjust methods until proper compaction is achieved. Prior to placement of a <br />subsequent lift, the previous lift shall be thoroughly scarified to a nominal depth of 2- inches <br />to provide good bonding between lifts. Scarification shall be accomplished by disking, <br />raking with a grader, or an alternative method approved by CERTIFYING ENGINEER. <br />10. The CQA Monitor will measure the ambient air temperature on an hourly basis. If the <br />ambient air temperature is less than thirty-two degrees Fahrenheit for more than one hour <br />(1) over the preceding twenty-four (24) hours, the CQA Monitor will measure the <br />temperature of the fill to determine if the fill is frozen. "Frozen" is defined as a mean <br />temperature of thirty-two degrees Fahrenheit (32 °F) or less. The CQA Monitor will <br />measure the temperature at a depth of three (3) inches and six (6) inches, recording the <br />lower of the two. Six (6) measurements will be taken per acre, and if the average is below <br />thirty-two degrees Fahrenheit (32 °F), the fill will be considered frozen. If the fill is <br />determined to be frozen the CONTRACTOR may either remove and replace the frozen fill <br />Page 9 of 18 January 14, 2011 <br />Revision 0 <br />