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its occupancy so as to increase its required fire flow above five thousand five hundred (5,500) gallons per minute. No existing building which currently requires a fire flow of more than five thousand five hundred (5,500) gallons per minute shall be added to, altered, or changed in the character of its occupancy if such addition, alteration or change would increase the fire flow required for such building. No building shall hereafter be constructed, and no additions, alterations, or repairs shall be made to an existing building within any twelve-month period which exceed twenty-five (25) percent of its value, and no existing building shall be changed in the character of its occupancy so as to increase the fire flow required for such building, unless fire hydrants and appurtenant water supply capable of delivering the fire flow that will be required for such building, with a residual pressure measured at the hydrant outlet of not less than twenty (20) pounds per square inch during times of average daily consumption, are located in accordance with the following distance limitations: 1. In any case where this requirement applies solely by reason of additions, alterations, or repairs to an existing building; and in the case of new construction of a building designed for Group R, Division 3 occupancy, as defined in the building code of the City of Santa Ana, or building or structure accessory thereto: the required hydrant or hydrants must be located within five hundred (500) feet of all portions of the exterior walls of the building or be protected. Such required hydrant or hydrants may be located either on a public street or on the site of the premises to be protected. 2. In all other cases: the required hydrant or hydrants shall be located on the site of the premises to be protected, except that any required hydrant may be located on a public street if such location is within one hundred fifty (150) feet of all portions of the exterior walls of the building to be protected. Where more than one (1) fire hydrant is located on the site of the premises to be protected, or where a combination of hydrants located on such site and a public street are used to meet the distance requirements, the required fire flow in gallons per minute may be divided between such hydrants provided: 1. That the combination of hydrants will deliver the required flow, and 2. That no single hydrant has a flow of less than one thousand five hundred (1,500) gallons per minute with a residual pressure Ordinance No. NS-XXXX 11 A-33 Page 33 of 43