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footage would not create new hazards to aircraft utilizing the <br />Livermore Municipal Airport. <br />Hydrology and Water Quality <br />If the Ice Center were increased in size by approximately 3,000 <br />square feet, construction and operational impacts to hydrology and <br />water quality would be similar to those under the Ice Center <br />Alternative, and would not create a substantially more severe <br />impact than shown in the EIR. <br />The increase in building size by 3,000 square feet may create <br />additional impervious roof surface. On the other hand, the <br />increased size may result in a corresponding reduction in the <br />amount of hardscape around the Ice Center. Slight increases in the <br />pollutant load (more than 5%) are considered potentially significant <br />because the Staples Ranch development already increases <br />pollutant loads substantially compared to existing conditions. <br />Increased amounts of impervious surfaces could also result in <br />higher peak flow rates discharged to the Arroyo Mocho. The Ice <br />Center Alternative assumed that almost 8 acres of impervious <br />surface would be added as a result of the construction of the Ice <br />Center. An increase in the size in building size by 3,000 square <br />feet would not change that analysis. <br />Implementation of the Hydrology and Water Quality mitigation <br />measures for the Ice Center Alternative would reduce potential <br />impacts to a less than significant level. <br />Land Use and Agricultural Resources <br />A minor increase in the size of the building would not substantially <br />change the land use compatibility of the Ice Center. The EIR <br />assumed the Community Park, including the Ice Center, would <br />have an FAR of approximately 19% and this is not proposed to <br />change. <br />Noise and Transportation <br />The increase in building size is not anticipated to increase traffic <br />and traffic noise levels. The proposal does not include additional <br />spectator seating and is not expected to increase the number of <br />people that will visit or work in the Ice Center. Correspondingly, <br />traffic levels and operational noise levels are not anticipated to <br />increase from what was analyzed for the Ice Center Alternative. <br />Construction of the additional square footage would result in noise <br />and vibration levels similar to those that would be generated during <br />construction of the proposed project. Implementation of the noise <br />5 <br />