Multi-Hazard Mitigation Plan: 18. Risk Assessment

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Chapter 18:Risk Assessment enhancement of the ventilation system to include better indoor air quality, and the abatement of hazardous material. This is a multi-hazard retrofit in which the State of Hawaii's contribution is the retrofit of the ventilation system to mitigate against harmful volcanic gas emissions and abatement of some indoor hazardous material. The Federal share contribution is for seismic bracing of the ceiling grid in essential facility areas, removal of an incinerator stack that is a potential seismic falling hazard, and mitigation against hurricane and windstorms through protection against windborne debris impacts on windows and rooftop mechanical systems and anchorage of nearby ancillary structures on site that would otherwise be large debris sources. Matching funds will come from two sources, both expenditures of the Hawaii Health System Corporation: 1) Final design and construction documents for the retrofits prepared by a structural engineer, and 2) a Capital Improvement Project for Kau Hospital to provided enhanced supply air handling system to mitigate against Volcanic Gas (VOG), ceiling asbestos abatement, and the replacement of vulnerable jalousie louver windows for improved hurricane resistance and better control of the interior air environment. In past VOG episodes, patients have needed to be relocated to other hospitals because of lack of sufficient air pre- conditioning to eliminate sulfur dioxide and other VOG particulates. According to Hawaii Volcano Observatory 2008 estimates, Kilauea Volcano emits 2,300 tons of sulfur dioxide per day. The project was determined by the FEMA BCA tool to have over $4 million in benefits over 25 years accrued from building loss protection, contents loss prevention, and functionality protection to enable continuity of operations during hurricane and earthquake disasters. The Benefit Cost Ratio is expected to be 6.67. Thus, the combination of the proposed FEMA PDM retrofits with the state's already planned air handling and enclosure retrofits will mitigate against hurricanes, earthquakes, and volcanic gas hazards. 18-14 Hawaii County Multi-Hazard Mitigation Plan