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There shall be NO rock in contact with PVC pipe. The sub-contractor shall use backfilling equipment that will tamp backfill to its original density. He shall barricade or light the excavation to prevent hazards to the public. Objectionable materials such as old concrete, asphalt, lime rock and bricks that are encountered during working operations, shall be removed from the project by the sub-contractor. B. PVC Pipe Assembly: 1. All PVC pipe shall be cut to the proper length prior to assembly. The cut shall be neat and square, 90 degrees to the axis of the pipe. Prior to assembly, the cut end shall be de- burred. The fitting and pipe end shall both be cleaned with a PVC Etch Primer. This primer shall have a purple tint to aid in visual inspection. 2. A thin even flow coat of slow drying, heavy duty PVC solvent/glue shall be applied to both the inside of the fitting and the pipe-mating surface. 3. The pipe shall be inserted into the fitting until it bottoms, and then given quarter turn to insure proper sealing. The pipe and fittings shall be out of service during the curing time as recommended by the manufacturer or 24 hours, whichever is longer. The finished joint shall be watertight and shall have strength equal to or greater than that of the pipe being joined. The direct tapping of PVC pipe or fittings shall not be permitted. C. Irrigation Control Wire: See irrigation specifications on irrigation plans. D. Cleaning and Pressure Testing: 1. After all PVC assembly is complete and prior to the installation of the sprinkler heads, the lines shall be flushed to insure that no rock, sand or other foreign material remains in the lines. 2. The sprinkler mains shall be filled with water and all outlets shall be capped and plugged. The main shall be pressurized to 100 PSI for a minimum of 24 hours. No section of the main will be approved if the pressure drops by more than 10% at the end of the 24-hour period. Leaks shall be repaired immediately and the system shall be retested until found satisfactory. Contractor is responsible to provide an oil filled gauge for Pressure testing for Final Acceptance. E. Modifications Due to Field Conditions: Conditions that occur on the site that cause the system to be modified, shall be presented as shop drawings by the sub-contractor and approved by the Design Consultant prior to construction. F. Power feed to the time clock and pump station if the General Contractor shall provide present. The Irrigation Contractor shall be responsible for activating/energizing controller and pump station if present. Precise voltage and Phases shall be coordinated before installation. All wires into and out of the time clock shall be in conduit. G. Underground and Overhead Utilities: City of Sunny Isles Beach NE 174th Street Roadway Improvements 328400 - 6 Irrigation