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IRRIGATION Section 02810 Project 15-1207 handle and assemble pipe, fittings and equipment. Keep interior of pipes, fittings and accessories clean at all times. Close ends of pipe immediately after installation; leave closure in place until removal is necessary for completion of installation. Do not permit bending of pipe. C. Flushing: Remove end heads and operate system at full pressure until all rust, scale, and sand is removed. Divert water to prevent ponding or damage to finished work. D. Coverage: Accept responsibility for full and complete coverage of irrigated areas to satisfaction of Landscape Architect and make necessary adjustments to better suit field conditions at no additional costs to Owner. 3.14 CONCRETE WORK A. Underground anchors and pads for valves boxes are included under this Section of Specifications. Concrete shall have a minimum strength of 2500 psi. The slump test shall be a four inch (4") maximum slump. At twenty-eight days, the concrete shall have a minimum strength of 2500 psi. Use materials and mix in accordance with ASTM C 94. Refer to Section 03300 —CONCRETE WORK. 3.15 FIELD QUALITY CONTROL A. Visual Inspection: Verify that all pipe is homogenous throughout and free from visual cracks, holes, or foreign materials. Inspect each length of pipe. All materials are subject to impact test at the discretion of the Landscape Architect. B. Hydrostatic Tests — Open Trench: Center -load piping with a small amount of backfill to prevent arching or slipping under pressure. 2. Request the presence of the Proiect Inspector in writing at least forty-eight hours in advance of testing. 3. At no additional cost to Owner, test in the presence of the Project Inspector. 4. Apply continuous static water pressure of 100 psi when welded plastic joints have cured at least twenty-four hours, and with the risers capped, as follows: test main lines and submains for four hours; test lateral lines for two hours. 5. Repair leaks resulting from tests; and repeat tests. 6. Test (in presence of District personnel) to determine that all sprinkler heads function according to manufacturer's data and give full coverage according to intent of Drawings. Replace any sprinklers not functioning as specified with ones that do, or otherwise correct system to provide satisfactory performance. C. Continuity Testing: Test locating device and control wires for continuity prior to and after back -filling operations. 13