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' E . DENSITY TESTS <br /> ' 1 . The Contractor shall arrange to have sufficient soil tests made by an <br /> independent testing laboratory selected by the Engineer to <br /> demonstrate conformance of his work with the stability and <br /> compaction levels required by these specifications . Compaction tests shall <br /> be taken at intervals listed herein or as deemed necessary <br /> by the Engineer. <br /> ' 2 . Any proposed alternative test methods to those specified herein must be <br /> approved by the Engineer prior to testing . At the request of the Engineer, <br /> ' the Contractor shall provide such documentation of a proposed <br /> alternative test method as the Engineer may require to evaluate the <br /> method for approval. <br /> ' 3 . In no case shall the Contractor proceed with construction on <br /> compacted material until the tests prove satisfactory and approval is given <br /> by the Engineer. <br /> 4 . In general , at least one test for maximum dry density/optimum <br /> moisture content shall be performed on a representative sample of each <br /> inherently different material to be used for compacted backfill or <br /> embankment fill . For material of uniform composition and textural class , <br /> ' a minimum of one test per 200 cu. yd. of material shall be performed <br /> at the point of use . <br /> ' S . Generally, in-place density tests shall be performed at approximately 20 <br /> foot intervals ; one each side of pipe for each 12 inch lift. Additional density <br /> tests may be required by the Engineer. If any tests results are unsatisfactory , <br /> ' the Contractor shall re-excavate and recompact the backfill at his <br /> expense until the required compaction is obtained. <br /> 9 . PIPE SYSTEM LAYING AND JOINTING <br /> ' A . GENERAL <br /> L Unless otherwise specified herein or directed by the Engineer, all pipe and <br /> ' fittings shall be laid and joined in accordance with the appropriate <br /> manufacturer' s directions with regard to allowable barrel and joint <br /> deflection, spigot seating depth, gasket placement, lubrication, bolt <br /> ' torque, field cutting/trimming, and pushing/pulling methods for joint <br /> assembly . <br /> 2 . Prior to placing in the trench, each pipe section, joint, and fitting shall be <br /> checked for damage or defects such as cracks, blisters , <br /> coating/lining separation, gouges , and the like . Any damage or <br /> defective materials found shall not be installed unless approved by the <br /> Engineer, and shall be marked " REJECTED " and immediately <br /> removed from the work site . <br /> ' C : \ Down1oad \ techspec - 02403 . doc 02403 - 7 <br />