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SECTION 02519 TESTING AND DISINFECTING WATER SYSTEM PART I - DISINFECTING POTABLE WATER PIPELINES 1 . 01 The new water system shall remain disconnected from existing water lines except for the temporary jumper connection. All water used to fill and test the new water system shall be obtained through the temporary jumper connection. Flushing shall be accomplished through the new connection only under direction by the Utility Authority and only after installation of upstream and downstream pressure gauges. 1 . 02 Before pressure testing against existing water system valves, and before being placed into service, potable water pipelines shall be chlorinated in accordance with the latest edition of AWWA C-651 , "Standard Procedure for Disinfecting Water Mains" . The procedure shall be approved by the Engineer. The location of the chlorination and sampling points will be as shown on the Drawings. Taps for chlorination and sampling shall be uncovered and backfilled by the Contractor as required. 1 .03 The pressure required for the field hydrostatic pressure test shall be 50 percent above the normal working pressure but not less than 150 psi. The Contractor shall provide temporary plugs and blocking necessary to maintain the required test pressure. Corporation cocks at least 3/4-inches in diameter, pipe riser and angle globe valves shall be provided at each pipe dead-end in order to bleed air from the line. Duration of pressure test shall be at least 2 hours. The cost of these items shall be included as a part of testing. 1 .04 The leakage test shall be conducted concurrently with the hydrostatic pressure test and shall be of not less than 2 hours duration. All leaks evident at the surface shall be repaired and leakage eliminated regardless of total leakage as shown by test. Lines which fail to meet tests shall be repaired and retested as necessary until test requirements are complied with. Defective materials, pipes, valves and accessories shall be removed and replaced. The pipe section to be tested shall be between valves or in such sections as may be directed by the Engineer by shutting valves or installing temporary plugs as required. In no case shall the section of line to be hydrostatically tested exceed 2000 feet in length. The line shall be filled with water and all air removed and the test pressure shall be maintained in the pipe for the entire test period by means of a force pump to be furnished by the Contractor. Accurate means shall be provided for measuring the water required to maintain this pressure. The amount of water required is a measure of the leakage. 1 .05 The Contractor must submit his plan for testing to the Engineer for review at least five (5) working days before starting the test. The Contractor shall remove and adequately dispose of all blocking material and equipment after completion and acceptance of the field hydrostatic test, unless otherwise directed by the Engineer. Any damage to the pipe coating shall be repaired by the Contractor. Lines shall be totally free and clean prior to final acceptance. 1 .06 The Engineer or the Engineer's representative must be present during testing. PART 2 - PRESSURE AND LEAKAGE TESTS OF UNDERGROUND PRESSURE PIPING 2 .01 Hydrostatic pressure and leakage tests for ductile iron pipe shall conform with Section 4 of AWWA Standard C-600, with the exception that the Contractor shall furnish all gauges, meters, pressure pumps and other equipment needed to test the line. PVC pipe shall be tested in accordance with 02519 — Testing and Disinfecting Water System 02519 - 1