PC-2026-16 - Laserfiche WebLink

PC-2026-16 June 24, 2026 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 Blowoff requirements: At all dead ends whether temporary or permanent At all low points in the line Minimum fire flows in gallons per minute (gpm): 2,000 to 2,500 gpm for 2 hours (single family residential) Minimum pressures: 40 psi (peak hour demand) 20 psi (maximum day demand plus fire flows) Dwelling unit equivalent flows: 160 gallons per day (single family residential) 78. BACKFLOW PREVENTION ASSEMBLIES: Backflow preventer assemblies shall be designed and installed in accordance with current City Standard Drawings 704, 705, 706; Pleasanton Municipal Code Chapter 14.16, State Health and Safety Code; State Water Resources Control Board adopted Cross-Connection Control Policy Handbook (CCCPH); and as required by the Public Works Department. Backflow Preventers (BFP) shall be selected from the latest “List of Approved Backflow Prevention Assemblies” available from the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California. All backflow preventer assemblies shall be tested and certified by a City approved tester with the certification submitted to the City. Testing will be performed at the time City water is turned on to the site. If an existing backflow preventer is on the site, it shall be tested and certified by a City-approved tester with the certification submitted to the City before project water is drawn through it. An all-weather cover shall be placed over all backflow prevention assemblies 4 inches and smaller, and follow City Standard Specification 19-02N for backflow enclosure requirements. (Fulfill this condition prior to plan approval.) 79. SINGLE-FAMILY RESIDENTIAL FIRE PROTECTION SYSTEMS AND BACKFLOW PREVENTION: Single-family residential water services which include a fire protection system must be equipped with either Double Check (DC) valve backflow protection (requiring annual testing) or satisfy CCCPH section 3.2.2(e)(3) with pass-through/purge design of fire protection system with signage posted at fixture to bring attention to the system design with pass-through/purge. If applicant selects to install DC, assembly shall be designed and installed in accordance with current City Standards 704, 705, and PMC 14.16; including installation as close as possible to the service line before the first branch line leading off the service line. (Fulfill this condition prior to plan approval.)