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City of Santa Ana -Park View at Town and Country Manor <br />Draft EIR <br />a.) Conflict with or obstruct implementation of the applicable air quality plan? <br />b.) Violate any air quality standard or contribute substantially to an existing or projected air <br />quality violation? <br />c.) Result in a cumulatively considerable net increase of any criteria pollutant for which the <br />project region is non - attainment under an applicable federal or state ambient air quality <br />standard (including releasing emissions, which exceed quantitative thresholds for ozone <br />precursors)? <br />d.) Expose sensitive receptors to substantial pollutant concentrations? <br />e.) Create objectionable odors affecting a substantial number of people? <br />4.2.5 - Impact Analysis and Mitigation Measures <br />This section discusses potential air quality impacts associated with the development of the project. <br />Mitigation measures are provided where necessary. <br />Regional Emissions <br />Impact 4.2 -1 The project would exceed the SCAQMD regional significance thresholds during <br />construction or operation. <br />Thresholds of Significance <br />Regional significance thresholds have been established by SCAQMD. Projects within the South <br />Coast Air Basin region with construction or operational emissions in excess of any of the thresholds <br />in Table 4.2 -3 are considered to have a significant impact. <br />Table 4.2 -3: Regional Significance Thresholds <br />Ilutant <br />Nitrogen oxides (NOx) <br />Construction <br />(pounds per day) <br />100 <br />Operation <br />(pounds per day) <br />55 <br />Volatile organic compounds (VOC) <br />75 <br />55 <br />Particulate matter (PMto) <br />150 <br />150 <br />Particulate matter (PM2.5) <br />55 <br />55 <br />Sulfur oxides (SO,) <br />150 <br />150 <br />Carbon monoxide (CO) <br />550 <br />550 <br />Source: Michael Bradman Associates, Air Quality Analysis Report, 2009. <br />Construction Impact Analysis <br />Short -term impacts refer to emissions generated during construction because they occur on a short- <br />term basis. Construction emissions can vary substantially from day to day, depending on the level of <br />activity, the specific type of operation, and prevailing weather conditions. Construction emissions <br />Michael Brandman Associates 4.2 -13 <br />H\Cl t(PN- Rnb327b32]003MMVB2]0030 Se 4GAvQ ity.DOc <br />