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2) All excavated material not suitable for backfill shall be placed on site at an acceptable location , by Owner, or hauled off the job at the price set forth in the accepted Bid Documents . All material that is brought in from other sources for backfill shallbe at the price set forth in the Contract. 3) Excavated material to be used for backfill shall be neatly deposited at the sides of the trenches where space is available to protect against caving or sloughing into the trench . Where stockpiling of excavated material is required , the Contractor shall coordinate the site location with the Engineer and shall maintain his operations to provide for natural drainage and not present an unsightly appearance . No excavated material shall be placed on private property without the consent of the property owner. j D) COMPACTION METHODS 1 ) Mechanical compaction shall be accomplished using pneumatic or gasoline-powered tampers or flat-plate vibrators , with the exception that the first two feet of backfilling over the pipe shall i be compacted by hand-operated tamping devices . 2 ) Flooding or puddling with water to consolidate backfill is not acceptable , except where sand is { encountered below unpaved areas only , and only with prior approval by the Engineer. The flooding or puddling operation shall be repeated with each two feet of backfill placed . E ) DENSITY TESTS 1 ) The Contractor shall arrange to have sufficient soil tests made by an independent testing laboratory selected by the Engineer to demonstrate conformance of his work with the stability and compaction levels required by these specifications . Compaction tests shall be taken at intervals listed herein or as deemed necessary by the Engineer. 2 ) Any proposed alternative test methods to those specified herein must be approved by the Engineer prior to testing . At the request of the Engineer, the Contractor shall provide such documentation of a proposed alternative test method as the Engineer may require to evaluate the method for approval . 3) In no case shall the Contractor proceed with construction on compacted material until the tests prove satisfactory and approval is given by the Engineer. 4) In general , at least one test for maximum dry density/optimum moisture content shall be performed on a representative sample of each inherently different material to be used for compacted backfill or embankment fill . For material of uniform composition and textural class , a minimum of one test per 200 cu , yd . of material shall be performed at the point of use . 5) Generally , in-place density tests shall be performed at approximately 20 foot intervals ; one each side of pipe for each 12 inch lift . Additional density tests may be required by the j Engineer. If any tests results are unsatisfactory , the Contractor shall re-excavate and recompact the backfill at his expense until the required compaction is obtained . 9 ) PIPE SYSTEM LAYING AND JOINTING j A) GENERAL j 1 ) Unless otherwise specified herein or directed by the Engineer, all pipe and fittings shall be laid and joined in accordance with the appropriate manufacturer's directions with regard to allowable barrel and joint deflection , spigot seating depth , gasket placement, lubrication , bolt torque , field cutting/trimming , and pushing/pulling methods for joint assembly . 2) Prior to placing in the trench , each pipe section , joint , and fitting shall be checked for damage or defects such as cracks , blisters , coating/lining separation , gouges , and the like . Any damage or defective materials found shall not be installed unless approved by the Engineer, I� and shall be marked " REJECTED" and immediately removed from the work site . i D-3-5 i