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Page 22 <br /> <br />98. SANITARY SEWER DESIGN STANDARDS: Connections to the City’s sanitary sewer <br />network shall conform to Pleasanton Municipal Code Title 15 “Sewerage”. All buildings <br />inhabited by human beings which are not more than 250 feet from the City’s sewer network <br />shall be connected. All premises, parcels, and/or lots shall have independent connections to <br />the City’s sewer network except under the following conditions: <br /> If a private on-site treatment system has been authorized by both the City and Alameda <br />County Department of Environmental Health. <br /> If multiple premises are located on a single parcel or lot which cannot be subdivided and are <br />all under one ownership. <br />The public sanitary sewer system shall be designed to satisfy the following minimum standards: <br />a. Minimum Manning Coefficient (n) within the pipe = 0.013 <br />b. Minimum flow velocity = 2 feet per second at least once per day <br />c. Maximum flow velocity = 10 feet per second <br />d. Maximum depth of flow to pipe diameter (d/D) = 0.75 for dry weather flow conditions <br />e. Minimum pipe sizes: <br />i. Laterals = 4 inches diameter <br />ii. Main = 8 inches diameter <br />iii. Force main = 6 inches diameter <br />f. Minimum slope per table: <br />Pipe size in diameter 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 />g. Maximum manhole spacing = 350 feet <br />h. Minimum curvature for curved sewer mains: 200 feet or not less than recommended by <br />pipe manufacturer <br />i. Minimum pipe cover = 5 feet <br />i. Peaking factor shall be Peak Wet Weather Flow divided by Average Dry Weather flow (PF <br />= PWWF/ADWF). Referring to the City’s Wastewater Master Plan from August 2007, PF <br />shall be the average of the three events shown on Table 4.5 “Inflow and Infiltration <br />Analysis” for each subbasin. The Basin I.D. is from Figure ES-3. Minimum allowable PF = <br />2.0. <br />j. Backflow prevention devices must be installed if the lowest plumbing fixture if the building <br />is lower than the downstream cleanout overflow device or manhole to assure effluent <br />discharge outside of the building in case the downstream pipe network becomes <br />obstructed. <br />k. Fats, Oils, and Grease (FOG) controls: Discharge of FOG to the City’s sanitary sewer <br />system shall conform to Pleasanton Municipal Code Chapter 15.44. In addition to other <br />controls, a sampling manhole must be provided immediately downstream of any grease <br />interceptor in accordance with City Standard Drawing 402. <br />(Address this condition prior to plan approval) <br /> <br />Docusign Envelope ID: DD265359-AEA1-4A7A-A8D3-92788E5DBFC8