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FLOW BYPASS SYSTEMS 02 7400-2 defined by the ENGINEER that may occur during a rainstorm. 3. If pumping is required on a 24-hour basis, engines shall be equipped in a manner to keep noise to a minimum. All pumps shall be on-line, isolated by individual valves, and be ready for immediate use in the event of an emergency or breakdown of an on- line pump. 4. There shall be 100% redundant pump ready for immediate use in the event of an emergency or breakdown of any of the service connection pumps. Each pumping location shall have provisions for immediate installation of a redundant pump without shutting the system down. 5. Bypass pumping system shall be of adequate size to convey the required flow without causing upstream pipelines to surcharge to more than 24 inches above the crown of the pipeline and 3 feet below the rim elevation. 6. Provide onsite portable lights for emergency use only. 7. Provide standby generation facilities for emergency use if pumps are equipped with electric motors. Standby generators shall be noise-rated for residential zones, meet air quality exhaust criteria of BAAQMD, as applicable, and shall meet the City’s ordinances. 1.02 SUBMITTALS A. Contractor shall submit a bypass pumping/piping plan and an emergency plan for each bypass setup. The bypass pumping/piping plans are required for mainline bypass and shall include: 1. A site plan showing dimensions, layout and list of equipment on each site and how the facilities will be protected from public access during use. 2. Detailed description of each bypass system including connection, testing, operation, alarm and control functions, and disconnection. 3. Contingency plans for power or equipment failure shall also be included where pumps are used. 4. Schematic Map showing route of discharge, discharge locations, areas to be fenced, and where and how discharge piping will be hardened to allow traffic access. B. Where pumping is required, submit complete information and calculations on pumping system to meet or exceed peak flow conditions. Calculations shall show the performance of pumps (where used) against friction and minor losses in each bypass system. C. Where standby generators are required, submit complete information and calculations on generation system. 1.03 QUALITY ASSURANCE A. The Contractor is responsible for the operation and maintenance of the bypass systems. These systems will operate 24-hours a day for 7 days a week for as long as bypassing is necessary.