1999-338A - Laserfiche WebLink

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40 W SCOPE A. This Section describes the procedural, material, and acceptance requirements for cleaning, disinfecting, and testing of water distribution systems with regard to sanitary quality, alignment, tightness, and overall integrity of the installed system. GENERAL A. The Contractor shall furnish all labor, materials, transportation, pumps, gauges, and equipment necessary to flush, disinfect, and test the installed pipe system as required by these Specifications. B. • The Contractor shall provide and install all temporary connections, corporation stops, blowoffs, and the like required for flushing and testing, and upon completion of satisfactory tests, shall remove same and install appropriate plugging/capping devices or permanent connections as required. C. The Contractor shall notify the Engineer at least 24 hours in advance of all acceptance testing to be performed. No testing for acceptance of the work shall begin until the Engineer or his authorized representative is present. D. No interconnection shall be made between the new work and an existing active pipe system, except that necessary and approved by the Engineer for testing, until the work is approved for use by the Engineer and until all approvals and clearances required by applicable construction permits for use of the work are issued by the permitting agency. E. At least 3 business days prior to conducting each item of work under this Section, the Contractor shall submit to the Engineer for approval a description of the specific equipment, materials, and procedures to be used, plus identification of proposed water source(s), testing lab(s) and field analysis kits) as applicable to the particular work item. 3. FLUSHING A. Upon completion of each run of pipe between main valves or between a main valve and a terminal blowoff, the pipe run shall be flushed at a minimum full diameter velocity of 2.5 ft./sec. in order to remove sand, debris, and other foreign materials prior to pressure testing and disinfection. Turing flushing, all in-line service meters shall be bypassed or replaced with a temporary spool to prevent damage due to excessive flow. B. Where a pipe system is looped, no more than one loop shall be included in any section being flushed. I. C. The pipe run to be flushed shall be slowly filled with clean water with all valves, hydrants, and services open to allow escape of air pockets. High points in the pipe shall be vented with suitable valved taps as necessary., When the system is full and prior to flushing, all services and hydrant stub -out valves shall be fully closed. The ends of services shall be xu•r 6