ORD 2308 - Laserfiche WebLink

Ordinance No. 2308 August 11, 2026 Maximum depth of flow to pipe diameter (d/D) = 0.75 for dry weather flow conditions Minimum pipe sizes: Laterals = 4 inches diameter Main = 8 inches diameter Force main = 6 inches diameter Minimum slope per table: Pipe size in diameter Minimum slope 4 inches 0.02 (lateral) 6 inches 0.005 (lateral) 8 inches 0.003 10 inches 0.0025 12 inches 0.0020 15 inches or larger 0.0015 Maximum manhole spacing = 350 feet Minimum curvature for curved sewer mains: 200 feet or not less than recommended by pipe manufacturer Minimum pipe cover = 5 feet Backflow prevention devices must be installed if the lowest plumbing fixture if the building is lower than the downstream cleanout overflow device or manhole to assure effluent discharge outside of the building in case the downstream pipe network becomes obstructed. 77. POTABLE WATER SYSTEM DESIGN STANDARDS: All permanent connections to the City’s potable water network shall conform to Pleasanton Municipal Code §14.04.050. Any required water pressure and/or flow needed by the applicant beyond that available from the network at the point-of-connection must be provided by the applicant as a private improvement on the customer side of the meter or backflow prevention device. All extensions or upgrades to the potable water network shall be designed to satisfy the following minimum standards: (Address this condition prior to plan approval) Minimum number of valves: 3 at cross intersections 2 at “T” intersections 500 feet maximum spacing 1 valve at each fire hydrant lateral Minimum number of fire hydrants (subject to approval by Livermore-Pleasanton Fire Department (LPFD) Fire Marshal: 1 hydrant within 250 feet of any existing or proposed structure Minimum pipe size: 8-inch diameter Minimum depth of cover over pipe: 42 inches