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Ordinance No. 2306 <br />Page 18 of 35 <br />Page 18 of 35 <br /> <br />55. DESIGN STANDARDS: All permanent connections to the City’s potable water network <br />shall conform to Pleasanton Municipal Code §14.04.050. Any required water pressure <br />and/or flow needed by the project developer beyond that available from the network at <br />the point-of-connection must be provided by the project developer as a private <br />improvement on the customer side of the meter or backflow prevention device. All <br />extensions or upgrades to the potable water network shall be designed to satisfy the <br />following minimum standards: <br /> <br />a. Minimum number of valves: <br />i. 3 at cross intersections <br />ii. 2 at “T” intersections <br />iii. 500 feet maximum spacing <br />iv. 1 valve at each fire hydrant lateral <br />v. Pressure regulating valve station required between pressure zones <br /> <br />b. Minimum number of fire hydrants (subject to approval by Livermore-Pleasanton <br />Fire Department (LPFD) Fire Marshal: <br />i. 1 hydrant within 250 feet of any existing or proposed structure <br />ii. 2 hydrants within 500 feet of any commercial, multi-family residential, <br />industrial, or school building <br /> <br />c. Minimum pipe size: 8-inch diameter <br /> <br />d. Minimum depth of cover over pipe: 42 inches <br /> <br />e. Blowoff requirements: <br />i. At all dead ends whether temporary or permanent <br />ii. At all low points in the line <br /> <br />f. Maximum flow velocity: 10 feet per second (fps) <br /> <br />g. Minimum fire flows in gallons per minute (gpm): <br />i. 1,500 gpm for 2 hours (rural residential) <br />ii. 2,500 gpm for 2 hours (single family residential) <br />iii. 3,500 gpm for 2 hours (schools/commercial/public/institutional) <br /> <br />h. Minimum pressures: <br />i. 40 psi (peak hour demand) <br />ii. 20 psi (maximum day demand plus fire flows) <br /> <br />i. Dwelling unit equivalent flows: 160 gallons per day (single family residential) <br /> <br />56. SEPTIC TANK ABANDONMENT: If an on-site wastewater treatment system (septic <br />tank, leach field, or similar component) is discovered on properties subject to <br />development, said system shall be decommissioned according to a permit obtained <br />Page 41 of 617