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082 Finding 3: Specific economic, social or other considerations make infeasible the mitigation measures or project alternatives identified in the EIR. Facts in Support of the Finding As compared to the proposed project, there would be no significant unavoidable adverse impacts with the No Project Alternative as the site would remain undeveloped. While the No Project alternative would be less impacting than the proposed project, this alternative would not contribute the benefit of the proposed project, which would provide educational and recreational opportunities for the children and adults of Orange County. With no site redevelopment, the community would not have secondary benefits of this project encouraging the development of other museum and cultural facilities which would benefit the community and the County. Unlike the proposed project, there would be no enhanced benefit to the adjacent Santiago Creek and park areas with the No- Project alternative. In addition, the present security and vagrancy problems in the area would remain. PHASE I ONLY ALTERNATIVE Finding Specific economic, social or other considerations make infeasible the mitigation measures or project alternatives identified in the EIR. Facts in Support of Findine If construction and operation of Phase I was to occur without Phase II, there would be no expansion of the science center, including no expanded exhibit space, no theater, and no parking structure built on the site north of Santiago Creek. The Phase I only alternative would reduce some impacts compared to the proposed project, but many others would remain. If Phase II was not built, construction of the multi-level parking structure would not be unnecessary. No foundation work or offsite soil removal associated with the structure would occur. As site acreage would be reduced, so would the scope of potential impacts related to subsidence, soil erosion, expansive soils, groundshaking, or liquefaction on the Phase II parcel. However, seismic impacts for this alternative would remain similar to those identified for Phase I. Geologic and earth resources impacts associated with seismic activity are expected to be similar for this alternative with the exception of the theater and the Phase Il parcel for the parking structure. With Phase I Only, there would be less building square footage and mom paved parking areas on the 3.5-acre parcel. The proposed parking structure would not be constructed on the 1.95- acre parcel, which is currently located in the 100-year floodplain, and the area would retain its present condition as a relatively flat, unpaved surface. The Phase I alternative project would still drain runoffinto Santiago Creek via drainage piping. Since the project portion north of the creek would remain undeveloped and unpaved, less runoffwould be contributed to the creek. However, potential impacts to water quality from either particulate matter or accumulated sediment washing into Santiago Creek would be the same as those for ~l~e proposed prc~iect. Even with less absolute runoff occurring to Di~'coveo' Science Center EIR ,4pri110, 1997