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Sexlinger Farmhouse and Orchard <br />Residential Development Project <br />CEQA Findings <br />reason that with the reduced intensity of the project, impacts will still be less than <br />significant with mitigation incorporated, (January 2014 EIR Attachment, p. 4.) <br />2. Impact: Would the Project violate any air quality standard or contribute significantly to <br />an existing or projected air quality violation? <br />Finding: Less Than Significant, With Mitigation Incorporated. (FIR, p. 5 -10 through 5 <br />13.) <br />Analysis: SCAQMD has established daily emissions thresholds for several criteria <br />pollutants. While the proposed project will result in unmitigated daily construction <br />emissions below all thresholds for regional significance (EIR, Table 5 -1), and for NOX <br />and CO thresholds for local significance (FIR, Table 5 -3), the proposed project would <br />exceed daily construction thresholds for PM10 and PM2.5. Short-term, unmitigated daily <br />construction impacts will result in PM10 and PM2.5 emissions that exceed the AQMP <br />thresholds for particulate matter. Therefore, this impact is potentially significant. <br />However, with the implementation of the following mitigation measures, particulate <br />matter emissions will be reduced to less than significant: <br />AIR -l; In order to reduce particulate matter emissions during project construction, <br />nontoxic soil stabilizers or comparable dust suppressant shall be applied to all inactive <br />construction areas (previously graded areas inactive for five consecutive days or more). <br />Chemical soil stabilizers, if used, shall be applied according to manufacturer's <br />specifications, <br />AIR -2: In order to reduce particulate matter emissions during construction, exposed <br />surfaces shall be watered three times a day, <br />AIR -4: In order to reduce particulate matter emissions during construction, speeds on <br />unpaved roads will not exceed 15 miles per hour. <br />The incorporation of these measures will reduce PM2.5 and PM10 emissions. This is <br />because chemical stabilizers will reduce dust pick up from inactive graded areas, <br />spraying exposed dirt with water will reduce fugitive dust emissions, and reducing the <br />speed of trucks on unpaved areas will reduce dust kick -up. In total, these measures are <br />expected to reduce PM2.5 emissions from 5.17 pounds per day to 1,55 pounds per day. <br />(FIR, Table 5 -3, compared to Table 5 -5.) As the PM2.5 threshold is 4 pounds per day, <br />PM2.5 would be reduced to a level of less than significant, with incorporation of the <br />above mitigation measures. Similarly, emissions of PMI O would be reduced from 21.08 <br />pounds per day, to 3.74 pounds per day. As the PM10 threshold is 6 pounds per day, <br />PMI O would be reduced to a level of less than significant with incorporation of the above <br />mitigation measures. (EIR, Table 5 -3, compared to Table 5 -5.) Given that the project <br />proposal analyzed in the Draft FIR included development of 24 new single family <br />residences, and the project as approved will include development of only 22 new single <br />family residences, it stands to reason that with the reduced intensity of the project, <br />23 "Exhibit A" <br />