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Ordinance No. 2245 Page 26 of 37 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 = approximately 350 feet Minimum curvature for curved sewer mains: approximately 200 feet or not less than recommended by pipe manufacturer Minimum pipe cover= approximately five feet Peaking factor shall be Peak Wet Weather Flow divided by Average Dry Weather flow (PF = PWWF/ADWF). Referring to the City's Wastewater Master Plan from August 2007, PF shall be the average of the three events shown on Table 4.5 "Inflow and Infiltration Analysis" for each subbasin. The Basin I.D. is from Figure ES-3. Minimum allowable PF = 2.0. Backflow prevention devices must be installed if the lowest plumbing fixture in 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. Fats, Oils, and Grease (FOG) controls: Discharge of FOG to the City's sanitary sewer system shall conform to Pleasanton Municipal Code Chapter 15.44. In addition to other controls, a sampling manhole must be provided immediately downstream of any grease interceptor in accordance with City Standard Drawing 402. (Address this condition prior to plan approval) 75. 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: a. Minimum number of valves: i. three at cross intersections ii. two at "T" intersections iii. approximately 500 feet maximum spacing iv. one valve at each fire hydrant lateral v. Pressure regulating valve station required between pressure zones b. Minimum number of fire hydrants (subject to approval by Livermore-Pleasanton Fire Department (LPFD) Fire Marshal: i. one hydrant within approximately 250 feet of any existing or proposed structure ii. two hydrants within approximately 500 feet of any commercial, multi- family residential, industrial, or school building