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CW of Santa Ana -Park View at Town and Country Manor <br />Draft EIR <br />Level of Significance After Mitigation <br />Less than significant. <br />Mitigation measure AQ -1 would reduce emissions from onsite construction equipment by at least 5 <br />percent. Mitigation measure AQ -3 would reduce emissions from fugitive dust during grading and <br />demolition. After mitigation, the onsite emissions during construction are compared with the <br />localized significance thresholds and are summarized in Table 4.2 -9. As shown in Table 4.2 -9, <br />mitigated emissions during construction do not exceed the localized significance thresholds. Impacts <br />are less than significant. <br />Table 4.2 -9: Localized Significance Analysis (Mitigated) <br />4.2 -20 Michael Bmndman Associates <br />H\Cl t(PN- Rnb327b327003MMVB270030 Se 4EAvQ ity.D <br />Onsite Emissions (pounds per day) <br />NO: <br />CO <br />PMto <br />PMz.e <br />Demolition <br />7.6 <br />4.8 <br />10.8 <br />2.5 <br />Mass grading and excavation of material <br />71.9 <br />31.4 <br />12.7 <br />5.1 <br />(mitigation option to reduce soil movement to <br />200 cubic yards per day or less) <br />Trenching <br />16.4 <br />8.1 <br />0.8 <br />0.8 <br />Building (2011) <br />64.8 <br />25.8 <br />2.8 <br />2.6 <br />Building (2012) <br />60.2 <br />24.6 <br />2.6 <br />2.4 <br />Building and Coating <br />60.2 <br />24.6 <br />2.6 <br />2.4 <br />Building, Asphalt Paving, and Coating <br />87.9 <br />41.7 <br />5.0 <br />4.6 <br />Maximum Daily Emissions <br />87.9 <br />41.7 <br />12.7 <br />5.1 <br />LST - Adjacent to Project <br />183 <br />1,323 <br />13 <br />7 <br />Exceed LST? <br />No <br />No <br />No <br />No <br />Mass grading and excavation of material <br />71.9 <br />31.4 <br />26.1 <br />7.9 <br />(mitigation option to prohibit sensitive <br />receptors within 40 meters from Project) <br />LST - 40 meters from the Project <br />177 <br />1,602 <br />26 <br />8 <br />LST - 50 meters from the Project <br />167 <br />1,830 <br />39 <br />9 <br />Exceed LST? <br />No <br />No <br />No <br />No <br />Note: <br />LST = localized significance threshold <br />Each of the above activities does not occur at the same time; therefore, the maximum daily emissions <br />represent the maximum emissions that would occur in one day. <br />Demolition activities are reduced by at least 50 percent pursuant to documentation from the SCAQMD <br />in its fugitive dust mitigation, Table xIA, Construction & Demolition, <br />www.acgnd.gov /CEQA/ handbook / mitigation /fugitive /MM_fugitive.html <br />Source: Michael Brnndman Associates, Air Quality Impact Analysis, 2009. <br />4.2 -20 Michael Bmndman Associates <br />H\Cl t(PN- Rnb327b327003MMVB270030 Se 4EAvQ ity.D <br />