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Dust emissions generated by operation of construction equipment in unpaved areas were <br />estimated by multiplying the maximum number of acres of land expected to be disturbed in a single <br />day during the construction period by a fugitive dust emission rate taken from the EPA document <br />described above. <br />Calculation of Vehicular and Stationary Operation Emissions <br />The Fashion Square EIR included estimates of emissions of CO, ROG, NOx, and PM10 <br />generated by motor vehicles traveling to and from the project site, and the on -site use of natural gas. <br />Emissions of CO, ROG, NOx, and PM10 generated by motor vehicles and on -site natural gas use <br />were estimated for the proposed MainPlace modifications by multiplying the emissions estimated <br />in the Fashion Square EIR by a factor equal to the proposed expansion's square footage divided by <br />the square footage analyzed in the Fashion Square EIR. <br />Construction -Related Impacts <br />As shown in Table 6, construction of the proposed MainPlace modifications would result in <br />the emission of approximately 72 pounds per day (ppd) of CO, 8 ppd of ROG, 75 ppd of NOx, and <br />119 ppd of PM10. These quantities are clearly below the SCAQMD construction emission <br />thresholds of 550 ppd of CO, 75 ppd of ROG, 100 ppd of NOx, and 150 ppd of PM10. <br />Operation -Related Impacts <br />As shown in Table 7, even though emissions for pollutant emissions generated by the <br />proposed MainPlace modifications are above AQMD thresholds, these emissions coupled with the <br />emissions for the existing center would be well below the quantities generated by the project <br />analyzed in the Fashion Square EIR. <br />Shade/Shadow, Solar Glare, Illumination <br />The Fashion Square EIR examined shade/shadow from the assumption that high-rise <br />buildings could be built onsite. This was assumed at the time based on the square footage that was <br />proposed, and the lack of a finite configuration. That analysis examined multi -story building ranging <br />from 8 to 52 stories at various setbacks from area residential neighborhoods. It was determined that <br />no impacts would result. The existing buildings onsite are no higher than three stories and pose no <br />shade/shadow impacts to offsite structures. The proposed expansions of the testaurant/cinema and <br />the Robinson's-May department store addition are also proposed at a maximum of three stories, will <br />blend with the existing structure, and will not result in any adverse impacts to shade/shadow. <br />Addendum ri for Main Plaae/Santa Ana (ER96.033) Aprll4, 1996 <br />Page 20 Project No. 96.066 <br />75D-411 <br />