2004-078 - Laserfiche WebLink

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H . Gravity sewers must be installed in front ( under driveway/roadway pavement) of new buildings and/or under roadway pavement in dedicated Rights-of-Way, all accessible to maintenance equipment. I . Gravity Mains shall be installed a minimum of 10 feet from any existing or proposed structure (walls , trees , transformer pads , etc. ) . 11 . 02 WASTEWATER PUMPING STATIONS A. A Remote Telemetry Unit ( RTU ) shall be included in all pump stations that are to be dedicated to Indian River County, B . Wastewater pumping stations shall be designed to peak ultimate development flow from all contributory areas , in accordance with the Indian River County Wastewater Master Plan . Design average daily flow and peak hour flow shall be as set forth in Section 11 . 01 . C . Design of private lift stations that may be dedicated to the County at a later date shall meet IRCDUS design standards and . shall be approved by IRCDUS . Any private station that does not meet IRCDUS design standards will not be taken over by the IRCDUS . Owners of private stations shall sign a form acknowledging future upgrade requirements if Owner is to dedicate a private station to the IRCDUS at a later date . D . At least 2 pumps shall be provided for stations handling flows of 700 gallons per minute (gpm ) or less . A minimum of 3 pumps shall be provided in stations where peak design flow exceeds 700 gpm unless otherwise approved by IRCDUS . In all cases , standby-pumping capability shall be provided such that if any one Pump is out of service , an alternate unit is available at equal or greater capacity. E . The sewage pump system shall be capable of pumping the design peak flow at the maximum computed system total dynamic head . Maximum residual head within existing force mains shall be obtained and coordinated through IRCDUS. F . Pumps shall be capable of passing spheres of at least 3-inches in diameter, and Pump suction and discharge piping shall be at least 4-inches in diameter. Grinder pumps shall be used when riser pipes in wet well are less than 3-inches . Minimum valve (all types ) size is 4-inches . G . Wet wells shall be a minimum of 6 -feet in diameter ( ID ) . All wet wells shall be sized to provide a minimum pump cycle of 15 minutes . Pumps shall be designed to provide a minimum pump run time equal to half the cycle time . Additionally, wet wells shall provide sufficient space for installed equipment and required suction pipe submergence and spacing . The wet well floor shall have a minimum slope of one-to-one to the hopper bottom . H . A separate valve vault shall be provided to house the gate valves , check valves and the emergency pump connection . The vault shall be of sufficient size to allow for installation , removal and maintenance of the valves . The bottom of the valve vault shall be a minimum of 12-inches above the high water level of the associated development. The wet well top elevation and the valve vault top 11 - 2