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mainline run between manholes shall be performed. If any test results are unsatisfactory, the Contractor shall re -excavate and recompact the backfill, at his expense, until the required compaction is obtained. 6. The costs of all sampling, proctor and density testing shall be paid for by the Contractor. 3.08 PIPE SYSTEM LAYING AND JOINTING A. General 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, and shall be marked "REJECTED" and immediately removed from the work site. 3. Prior to installation, the interior of all pipe and fittings shall be inspected for debris, sediment accumulation, sand, and the like, and shall be cleaned as required to remove such foreign matter. Joint surfaces such as gaskets, gasket grooves, spigots, and bells shall be cleaned of sand and grit prior to joining. 4. Gasket lubricants shall be stored and applied in a manner that will prevent significant contamination or pick-up of sand and grit. 5. The pipe spigot shall be centered in and aligned with its mating bell prior to insertion and forced evenly in a straight line to seating depth, taking care not to over -bell the joint. Where required, deflections shall be made after the joint is seated. 6. Joining shall generally be done by hand or by push -bar with a cushion block whenever pipe size and weight permit. When a mechanical pushing/pulling device such as chain -puller, come -along, and the like is required, the device shall be used in a manner that will not deform gouge, chip, or otherwise damage the pipe or cause significant disturbance of the prepared bedding. In no case shall joints be made by "popping -on" or swinging the spigot into the bell to seat the joint. 7. Fittings and appurtenances shall be fully, independently supported on the bedding or on a permanent foundation so as not to bear on the pipe upon completion of the installation. 8. The installed piping system shall be kept free of dirt, trench water, and other foreign matter during the progress of the work, and all open ends of the line shall be sealed with watertight plugs whenever work is not in progress. 02530 — Gravity Sanitary Sewer Piping 02530- 8 4