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Section 02200 <br />Earthworks <br />B. Structural Fill <br />amee <br />When materials spread on the fill are too dry for proper compaction, CONTRACTOR shall <br />spray water on each layer of the fill and shall work the moisture into the fill by harrowing or <br />other approved means, until a uniform distribution of moisture is obtained. Material that is <br />too wet for proper compaction, as determined by CERTIFYING ENGINEER, shall be <br />removed from the fill and/or spread out and permitted to dry, assisted by disking and <br />harrowing or mixing in dry material when permitted by CERTIFYING ENGINEER, if <br />necessary, until the moisture content is reduced to an amount suitable for obtaining the <br />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 <br />placement of a subsequent lift, the previous lift shall be thoroughly scarified to a nominal <br />depth of 2- inches to provide good bonding between lifts. Scarification shall be <br />accomplished by disking, raking with a grader, or an alternative method approved by <br />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 (1) <br />over the preceding twenty-four (24) hours, the CQA Monitor will measure the temperature <br />of the fill to determine if the fill is frozen. "Frozen" is defined as a mean temperature of <br />thirty-two degrees Fahrenheit (32 °F) or less. The CQA Monitor will measure the <br />temperature at a depth of three (3) inches and six (6) inches, recording the lower of the two. <br />Six (6) measurements will be taken per acre, and if the average is below thirty-two degrees <br />Fahrenheit (32 °F), the fill will be considered frozen. If the fill is determined to be frozen the <br />CONTRACTOR may either remove and replace the frozen fill or wait until subsequent <br />temperature monitoring indicates the fill is unfrozen, at no cost to CC &V. <br />11. Overburden slopes shall be compacted using a method specification and graded to meet the <br />grades and dimensions shown on the DRAWINGS. The Bedding Fill subgrade surface will <br />be prepared as identified in Section 2200 of the SPECIFICATIONS. <br />1. Areas to receive Structural Fill will include, but are not limited to, slope reductions, and <br />miscellaneous site grading. <br />2. CONTRACTOR shall condition Structural Fill to a moisture content that allows <br />compaction to the required density and that results in a firm, unyielding surface capable of <br />allowing the movement of vehicles and equipment over the surface without causing rutting <br />or other deleterious effects. <br />3. CONTRACTOR shall place Structural Fill materials with less than 30 percent rock <br />materials above 3/4 -inch size in maximum 12 -inch loose lifts, and compact to 95 percent of <br />maximum dry density (ASTM D698). <br />P \Phase 5 OSA 2011 Cert Report \Appendices\Appendix E Specifications \02200 r1 doc <br />Page 9 of 18 September 3, 2008 <br />Revision 1 <br />