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SECTION 12: The City Council of the City of Santa Ana hereby finds, determines and declares that adoption of Section 8-115 amending California Building Code section 1005.3.3.7 is necessary because of local climatic, geological or topographic conditions. This expressed finding is supported and based upon the following more specific findings, and determinations: The City of Santa Ana is located in an area subject to a climatic condition of high winds and Iow humidity. This combination of events creates an environment, which is conducive to rapidly spreading fires. Control of such fires requires rapid response. Obstacles generated by a strong wind, such as fallen trees, street lights and utility poles, and the requirement to climb 75 feet vertically up flights of stairs will greatly impact the response time to reach an incident scene. Additionally Table 16-G identifies a significant increase in the amount of wind force at 60 feet above the ground. Use of aerial type fire fighting apparatus above this height would place rescue personnel at increased risk of injury. The City of Santa Ana is located in the middle of the seismically active area identified as Seismic Zone 4. The viability of the public water system would be questionable at best after a major seismic event. This would leave tall buildings vulnerable to uncontrolled fires due to a lack of available water and an inability to pump sufficient quantities of any available water to floors above the 55-foot level. A severe seismic event has the potential to negatively impact any rescue or fire suppression activities because it is likely to create obstacles similar to those indicated under the high wind section above. With the probability of strong aftershocks there exists a need to provide increased protection for anyone on upper floors. SECTION 13: That section 8-115 is added to Chapter 8 of the Santa Aha Municipal Code to read in full as follows: Sec 8-115. Section 1005.3.3.7 is amended to read as follows: 1005.3.3.7 Pressurized enclosure. In a building having a floor level used for human occupancy located more than 55 feet (16.674mm) above the lowest level of fire department vehicle access, all required exit enclosures shall be pressurized in accordance with Section 905 and this section. Pressurization shall occur automatically upon activation of an approved fire alarm system. EXCEPTION: If the building is not equipped with a fire alarm system, pressurization shall be upon activation of a spot-type smoke detector listed for releasing service located within 5 feet (1524 mm) of each vestibule entry. A controlled relief vent capable of discharging a minimum of 2,500 cubic feet per minute (1180 L/s) of air at the design pressure difference shall be located in the upper portion of such pressurized exit enclosures. Ordinance No. NS-2522 Page 9 of 47