DISCOVERY SCIENCE CENTER OF ORANGE COUNTY - 2002

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LSA ASSOCIATES, INC. MARCH 2002 ENVIRONMENTAL ANALYSIS AMENDMENT NO. I DISCO% ERY SCIENCE CENTER Noise Potential long -term and short-term noise impacts and cumulative noise impacts associated with the implementation of the DSC project were adequately evaluated in FEIR 96 -01. Mitigation measures were identified in FEIR 96 -01 to reduce potential noise impacts to a level considered less than significant with the exception of noise from piledriving for the parking structure (if it is determined to be necessary) and noise associated with potential outside activities adjacent to the freeway. The increased development area proposed for DSC Phase II would not result in additional noise impacts beyond the impacts previously analyzed in FEIR 96 -01 and would not substantially increase the severity of any noise impact identified in FER 96 -01. Additionally, no new information has been made available since preparation of FEIR 96 -01 that would affect the noise analysis and environmental determinations made in FEIR 96 -01. Geology /Soils Potential geological and soil impacts associated with the implementation of the DSC project were adequately evaluated in FEIR 96 -01. Mitigation measures were identified in FER 96 -01 to reduce potential geological and soil impacts to a level considered less than significant. The projected height of the building housing the domed theater is 106 feet, %Nhile the existing cube structure is 107 feet. The increased development area proposed for DSC Phase II would not result in additional geologic or soil impacts beyond the impacts previously analyzed in FEIR 96 -01 and would not substantially increase the severity of any geologic or soil impacts identified in FER 96 -01, in that potential geologic constraints associated with the project site are addressed in FER 96 -01. Because the site is flat and a relatively small amount of soil excavation is necessary, implementation of the proposed project would not involve the development of land uses or construction activities that would increase the risk of geologic impacts. Additionally, no new information has been made available since preparatim of FEIR 96 -01 that would adversely affect the geologic and soil impact analysis, mitigation measures, and environmental determinations made in FEIR 96 -01. Hydrology Potential hydrological impacts associated with the implementation of the DSC project were adequately evaluated in FEIR 96 -01. Mitigation measures were identified in FEIR 96 -01 to reduce potential hydrological impacts to a level considered less than significant. The increased development area proposed for DSC Phase II would not result in additional hydrological impacts beyond the impacts previously analyzed in FEIR 96 -01 and would not substantially increase the severity of any hydrological impact identified in FER 96 -01. There are no increases in surface eater runoff resulting from the proposed development. All drainage would be accommodated by on -site drainage improvements, as originally proposed. Additionally, no new information has been made available since preparation of FEIR 96 -01 that would adversely affect the hydrological impact analysis, mitigation measures, and environmental determinations made in FEIR 96 -01. Cultural Resources Potential project related and cumulative impacts to cultural resources associated with the implementation of the DSC project were adequately evaluated in FEIR 96 -01. Mitigation measures were included in FEIR 96 -01 to reduce project related impacts to cultural resources to a level considered less than significant. The increased deNelopment area proposed for DSC Phase II would HAROBB`FILESWmend I dsc revl.doc 0307/02» 7 Page 7 of 17