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17 <br /> the main and lateral pipes, if possible. Ten-inch loops shall be provided at each <br /> valve where control wires are connected . All wires passing under existing or <br /> future paving, construction, etc . , shall be encased in plastic pipe as specified, <br /> extending at least twelve inches beyond edges of paving or construction. <br /> E. TESTING: All main lines shall be hydrostatically tested in the presence of the <br /> Owner's representative at a pressure of 40 psi for a period of time not less than <br /> four (4) hours, should any leaks be found, they shall be repaired . The line shall <br /> then be retested until satisfactory. All lateral lines downstream from the remote <br /> control valves shall be visually inspected for leaks, should any be found, they shall <br /> be repaired . The line shall then be retested until satisfactory. <br /> F. BACKFILL AND COMPACTING After system is approved or sections thereof, <br /> backfill excavations and trenches with clean soil, free of rubbish. Backfill for all <br /> trenches, regardless of the type of pipe covered shall be compacted to a minimum <br /> 90% of its maximum density (AASHTO T480) . Dress off all areas to finish <br /> grades. <br /> G. PUMP ENCLOSURE : <br /> I . Pump house shall be pre-manufactured fiberglass enclosure bolted onto 6 " <br /> thick 3000 P . S . I . concrete slab . . 1 . <br /> 2 . Provide adequate interior space for maintenance. Approx. size: 4' x 4' x T tall . <br /> Increase size if necessary to accommodate equipment . <br /> 3 . Submit shop drawings for review prior to constructing. <br /> H . FINAL ADJUSTMENT Balance and adjust the irrigation system components for <br /> efficient, proper operation. This includes controller synchronization as well as <br /> individual settings of control stations. <br /> 3 . INSTRUCTIONS <br /> A. LABELS <br /> 1 . Number each zone valve box on underside of valve box cover with a black <br /> waterproof marker for reference. Numbers shall match the zone numbers on <br /> the drawings . <br /> 2 . Number each zone valve control wire at the controller with a waterproof <br /> marker and tags . Numbers shall match the zone numbers on the drawings . <br /> B . MAINTENANCE <br /> 1 . Maintain the irrigation system until final acceptance of the work. Maintenance <br /> shall include work, materials and replacements necessary to insure a complete <br /> properly operating system. <br /> 2 . It will be the Owner's responsibility to maintain the system in working order <br /> 2B - 6 <br />