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4. Pipelines shall be flushed and tested in such lengths or sections as agreed upon between the OWNER, ENGINEER, and CONTRACTOR. 5. Give the OWNER and ENGINEER reasonable notice of the time prior to testing the pipeline. 6. The ENGINEER reserves the right, within reason, to request flushing and testing of a section or portion of a pipeline. 7. For sewage force mains, unless otherwise specified, the minimum test pressure shall be 150 psig. B. Flushing 1. At the conclusion of the installation work, thoroughly clean new pipe by flushing with water or other means to remove dirt, stones, and pieces of wood, which may have entered the pipe during the construction period. a. If after this cleaning should any obstructions remain, they shall be corrected by the CONTRACTOR, at his own expense and to the satisfaction of the ENGINEER. b. Pipelines shall be flushed at a rate of at least 2.5 feet per second for a duration suitable to the ENGINEER, but in no event less than 60 minutes. C. Pressure Testing 1. After the pipe has been installed, joints completed, thrust blocks have been in place for at least five days, and the trench has been partially backfilled leaving the joints exposed for examination, the pipe shall be filled with water in a manner to expel air. a. The pipeline shall be subjected to a test pressure of 150 psig, as measured at the low points of the pipe, for a period of at least two hours. b. Each valve shall be opened and closed several times during the test. c. The exposed pipe, joints, fittings, and valves shall be examined for leaks. d. Visible leaks shall be stopped or the defective pipe, fitting, joints, or valve(s) shall be replaced. D. Leakage Testing 1. The leakage test may be conducted subsequent to or concurrently with the pressure test. City of Sunny Isles Beach NE 174th Street Roadway Improvements 15105 - 29 Pipes and Tubes 14-1758 / 09-19-2014