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t ~ Responses to " `~ Environmental Checklist i j For CEQA Compliance G, Place housing within a 900-year floodpiain, as mapped en a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? Finding: No impact. Analysis: According to Orange County General P-an Figure 1X-6, Santa Ana River Overflow Area, the project area is not located within the 100 year floodpiain for the Santa Ana River, which is located northwesterly of the proposed project site. There are no other 100-year floodplains identified in the project area. Moreover, the project would not result in the construction of any new housing. Therefore, a significant impact would not occur. H. Place within a 100-year floodpiain structures which would impede or redirect flood flows? Finding: No Impact. Analvsis: Please refer to the discussion under Issue VIII.G. As indicated, the proposed project would not place any structures within a 100-year floodpiain. No impact would occur. I. Expose people or structures to a significant risk of loss, injury or death involving flooding, including flooding as a result of failure of a levee or dam? Finding: No Impact. Analysis: Please refer to the discussion under issue VIII.G. In addition, Orange County General Plan Figure iX-9, Prado Dam and Santiago Reservoir Inundation Areas, indicates that the project area is subject to inundation due to a failure of either the Prado Dam or Santiago Reservoir. However, the proposed project would not introduce any new residents into the area. Although the structures proposed as part of the project are subject to inundation hazards, such hazards are not considered to be significant because the chance of dam failure is low and because the proposed structure, which would be composed of solid brick materials, would not be significantly affected in such an event. As such, a significant impact would not occur. J. Inundation by seiche, tsunami, or mudflow? Finding: Less than Significant Impact. Analysis: Given the lack of topographic landforms in the project area, there is little to no potential for mudflow impacts. Likewise, there are no large bodies of water within the project vicinity which could be to significant seiche hazards. The project area is located approximately 7.0 miles northeast of the nearest coastline, and is therefore subject to potential tsunamis. However, the risk of tsunamis impacting the site is considered remote, and project implementation would not increase risks to existing or future residents due to potential tsunamis. For these reasons, impacts are evaluated as less than significant. Page 51 of 64 75E-55