2008-009 (4) - Laserfiche WebLink

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b. Depth of Cover and Pipe Elevation: Unless otherwise shown on the drawings, or otherwise authorized by the Engineer, all pipe shall have a minimum cover of 36 r inches. Contractor shall determine top of pipe elevation and top of ground elevation for every two (2) joints of pipe installed using a level . Pipe must have the minimum cover described above and must be within ±0.2 feet of the top of pipe elevation indicated on the drawings. Installed pipe which does not meet these requirements r shall be reinstalled until it does meet these requirements. Contractor shall record top of pipe and top of ground elevations and the locations of where these elevations were determined and submit this information to Engineer or his representative . Engineer r reserves the right to have Contractor excavate and check top of pipe and top of ground elevations to see if they conform to the aforementioned requirements, at no cost to Owner. r G . Testing And Inspection Of Water Mains, Pressure And Leakage Tests Of Underground Pressure Piping r 1 . Hydrostatic pressure and leakage tests shall conform with Section 4 of the latest edition . of AWWA C-600 Specifications , with the exception that the Contractor shall furnish all gauges, meters, pressure pumps, and other equipment needed to test the line . Engineer or designated representative shall be present during all testing, televising , and final inspections. r 2. The pressure required for the field hydrostatic pressure test shall be 1 . 5 times the normal working pressure at the point of testing, and not less than 1 .25 times the working pressure at the highest point along the test section , but not less than 150 psi r (100 psi for force main). The Contractor shall provide temporary plugs and blocking necessary to maintain the required test pressure. Corporation stops at least 1 ' 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 two (2) hours . The cost of these items shall be included as part of testing. 3. The leakage test shall be conducted concurrently with the hydrostatic pressure test and shall be of not less than two (2) hour duration. All leaks evident at the surface shall be repaired and leakage eliminated regardless of total leakage shown by test. Lines that r fail to meet tests shall be repaired and re tested as necessary until test requirements are met. Defective materials, pipes, valves, and accessories shall be removed and replaced. The pipelines shall be tested in such sections as may be directed by the r Engineer by shutting valves or installing temporary plugs as required. 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. r r r r