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City of Santa Ana <br />Environmental Checklist <br />b. Violate any air quality standard or contribute substantially to an existing or projected air <br />quality violation? <br />Less - than- Signlflcant Impact. As discussed above, the project site is located within the Basin, <br />where state and federal air quality standards are occasionally exceeded. The proposed project <br />would contribute to regional air pollutant emissions during construction (short -term) and project <br />operations (long- term). <br />Construction Impacts <br />Construction of the proposed project has the potential to create air quality impacts through the use <br />of heavy -duty construction equipment and through vehicle trips generated from construction <br />workers traveling to and from the project site. In addition, fugitive dust emissions would result from <br />site work related to the excavation and export of 3,021 total cubic yards of soil materials. Mobile <br />source emissions, primarily NOx, would result from the use of construction equipment such as <br />graders, scrapers, bulldozers, wheeled loaders, and cranes. During the structure erection /finishing <br />phase, paving operations and the application of architectural coatings (i.e., paints) and other <br />building materials would release ROG emissions. Construction emissions can vary substantially from <br />day to day, depending on the level of activity, the specific type of operation, and, for dust, the <br />prevailing weather conditions. The assessment of construction air quality impacts considers each of <br />these potential sources. <br />Construction of the proposed project is anticipated to take approximately 19 months to complete. <br />The total magnitude of construction activity, duration of construction activity, and intensity of <br />construction activity would have a substantial effect upon the quantity of construction emissions <br />(and related pollutant concentrations) occurring at any one time. As such, the emission forecasts <br />provided herein reflect a specific set of conservative assumptions based on the expected <br />construction scenario wherein a relatively large amount of construction activity is occurring in a <br />relatively intensive manner. As provided in Table 3 -5, construction- related daily (short -term) <br />emissions for the scenarios during which emissions from construction components could possibly <br />overlap are provided to be conservative. As shown, in no components or scenarios do emissions <br />exceed the SCAQMD regional thresholds, and short -term construction emissions can be considered <br />less than significant. <br />Table 3 -5. Estimate of Regional Construction Emissions (pounds per day) <br />Regional Construction Emissions <br />ROG <br />NOx <br />CO <br />SOx <br />PM10 <br />PM2.5 <br />Demolition <br />5 <br />39 <br />25 <br /><1 <br />4 <br />2 <br />Excavation & Soils Export <br />5 <br />36 <br />20 <br /><1 <br />6 <br />2 <br />Grading &Soils Prep <br />3 <br />26 <br />16 <br /><1 <br />3 <br />2 <br />Site Trenching & Bldg Foundation <br />2 <br />31 <br />23 <br /><1 <br />3 <br />2 <br />Building Construction 2013 <br />9 <br />52 <br />38 <br /><1 <br />5 <br />4 <br />Building Construction 2014 <br />9 <br />49 <br />37 <br /><1 <br />4 <br />4 <br />Concrete & Asphalt <br />5 <br />27 <br />20 <br /><1 <br />3 <br />2 <br />Architectural Finishing <br />19 <br />3 <br />4 <br /><1 <br />1 <br /><1 <br />SCAQMD Regional Threshold <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Exceed Threshold? <br />No <br />No <br />No <br />No <br />No <br />No <br />The Bat Nha Buddhist Meditation Center 3-19 June 2013 <br />Initial Study /Mitigated Negative Declaration ICi 00215.12 <br />31 C -72 <br />