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PC-2026-16 June 24, 2026 <br />sanitary sewer system shall be designed to satisfy the following minimum <br />standards: <br /> <br />Minimum Manning Coefficient (n) within the pipe = 0.013 <br />Minimum flow velocity = 2 feet per second at least once per day <br />Maximum flow velocity = 10 feet per second <br />Maximum depth of flow to pipe diameter (d/D) = 0.75 for dry weather flow <br />conditions <br />Minimum pipe sizes: <br /> Laterals = 4 inches diameter <br /> Main = 8 inches diameter <br /> Force main = 6 inches diameter <br />Minimum slope per table: <br />Pipe size in <br />diameter <br />Minimum slope <br />4 inches 0.02 (lateral) <br />6 inches 0.005 (lateral) <br />8 inches 0.003 <br />10 inches 0.0025 <br />12 inches 0.0020 <br />15 inches or larger 0.0015 <br /> <br />Maximum manhole spacing = 350 feet <br />Minimum curvature for curved sewer mains: 200 feet or not less than <br />recommended by pipe manufacturer <br />Minimum pipe cover = 5 feet <br /> <br />Backflow prevention devices must be installed if the lowest plumbing fixture if the <br />building is lower than the downstream cleanout overflow device or manhole to <br />assure effluent discharge outside of the building in case the downstream pipe <br />network becomes obstructed. <br /> <br />77. POTABLE WATER SYSTEM DESIGN STANDARDS: All permanent connections <br />to the City’s potable water network shall conform to Pleasanton Municipal Code <br />§14.04.050. Any required water pressure and/or flow needed by the applicant <br />beyond that available from the network at the point-of-connection must be <br />provided by the applicant as a private improvement on the customer side of the <br />meter or backflow prevention device. All extensions or upgrades to the potable <br />water network shall be designed to satisfy the following minimum standards: <br />(Address this condition prior to plan approval) <br /> <br />Minimum number of valves: <br />3 at cross intersections <br />2 at “T” intersections <br />500 feet maximum spacing <br />1 valve at each fire hydrant lateral <br />        <br /><br /><br /><br />