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8.17.1.1.1 Residential Waterflow Alarms. A local water -flow alarm shall be provided on all sprinkler systems and shall be connected to the building fire alarm or water -flow monitoring system, where provided. Group R occupancies not requiring a fire alarm system by the California Fire Code shall be provided with a minimum of one approved interior alarm device in each unit. Sound levels in all sleeping areas shall be minimum of 15 DBA above the average ambient sound or a minimum of 75 DBA with all intervening doors closed, whichever is greater. Alarms shall be audible within all other living areas within each dwelling unit. When not connected to a fire alarm or water -flow monitoring system, audible devices shall be powered from an uninterruptible circuit (except for over - current protection) serving normally operated appliances in the residence. (4) Section 11.1.1.2 is hereby added as follows: 11.1.1.2 When fire sprinkler systems are required in buildings of undetermined use other than warehouses, they shall be designed and installed to have a fire sprinkler density of not less than that required for an Ordinary Hazard Group 2 use, with no reduction(s) in density or design area. Warehouse fire sprinkler systems shall be designed to Figure 16.2.1.3.2 (d) curve "G ". Use is considered undetermined if a specific tenant/occupant is not identified at the time the sprinkler plan is submitted. Where a subsequent occupancy requires a system with greater capability, it shall be the responsibility of the occupant to upgrade the system to the required density for the new occupancy. (5) Section 11.2.3.1.1.1 is hereby added as follows: 11.2.3.1.1.1 The available water supply for fire sprinkler system design shall be determined by one of the following methods, as approved by the Fire Code Official: 1) Subtract the project site elevation from the low water level for the appropriate pressure zone and multiply the result by 0.433; 2) Use a maximum of 40 psi, if available; 3) Utilize the Orange County Fire Authority water -flow test form /directions to document a flow test conducted by the local water agency or an approved third party licensed in the State of California. (6) Section 23.2.1.1 is hereby revised as follows: Section 23.2.1.1 Where a waterflow test is used for the purposes of system design, the test shall be conducted no more than 6 months prior to working plan submittal unless otherwise approved by the authority having jurisdiction. (b) NFPA 13R 2013 Edition, Installation of Sprinkler System in Residential Occupancies up to and Including Four Stories in Height is hereby amended as follows: Ordinance No. NS -2851 Page 59 of 67