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City of Santa Ana <br />Environmental Checklist <br />occurring in a relatively intensive manner. As provided in Table 3 -5, construction- related daily <br />(short -term) emissions for the worst -case scenarios during which emissions from construction <br />components would overlap to exceed the SCAQMD regional significance thresholds for ROG and NOx <br />emissions in Phase 1, and ROG emissions in Phase 11. Thus, Mitigation MeasuresAQ -1 through AQ -3 <br />have been included to reduce short -term construction emissions to a less -than- significant level. <br />Table 3 -5. Estimate of Regional Construction Emissions (pounds per day) Before Mitigation <br />Measures <br />Notes: <br />Construction emission calculation worksheets are included in Appendix A. <br />a PM10 emissions estimates take into account compliance with SCAQMD Rule 403 requirements for <br />fugitive dust suppression, which require that no visible dust be present beyond the site boundaries, <br />as well as the use of EPA Tier 2 equipment. <br />b lmplementation of Excavation & Soils Import and Rough Grading & Bldg Pad Prep 2012; and Fine <br />Grading, Bldg Construction, Asphalt Parking Lots & Architectural Finishing 2013 within Phase 1 have <br />the potential to overlap, thus emissions are summed. <br />Implementation of Fine Grading, Bldg Construction & Architectural Finishing 2019 within Phase II <br />have the potential to overlap, thus emissions are summed. <br />Source: ICF 2012. <br />The Academy Charter High School June 2012 <br />initial Study /Mitigated Negative Declaration 3 -22 ICF 90914.11 <br />' 00� <br />ROG <br />NOx <br />CO <br />SOx <br />PM10a <br />PM2.5 <br />Phase I <br />Excavation & Soils Import 2012 <br />29 <br />284 <br />152 <br /><1 <br />29 <br />14 <br />Rough Grading & Bldg. Pad Prep 2012 <br />6 <br />51 <br />24 <br /><1 <br />5 <br />3 <br />Fine Grading & Soil Prep 2013 <br />4 <br />31 <br />16 <br /><1 <br />2 <br />2 <br />Site Trenching & Foundation Excavation 2012 <br />4 <br />35 <br />17 <br /><1 <br />4 <br />2 <br />Building Construction 2012 <br />7 <br />39 <br />37 <br /><1 <br />15 <br />3 <br />Building Construction 2013 <br />6 <br />36 <br />36 <br /><1 <br />14 <br />3 <br />Concrete Transit Mix - For Footings /Slabs 2012 <br />1 <br />9 <br />11 <br /><1 <br />8 <br /><1 <br />Asphalt Parking Lot Area 2013 <br />4 <br />28 <br />13 <br /><1 <br />2 <br />1 <br />Architectural Finishing 2013 <br />207 <br />3 <br />3 <br /><1 <br />1 <br /><1 <br />SCAQMD Regional Threshold (5 acres) <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Excavation & Soils Import and Rough Grading & Bldg <br />Pad Prep 2012b <br />35 <br />335 <br />176 <br /><1 <br />34 <br />17 <br />Fine Grading, Bldg Construction, Asphalt Parking <br />Lots & Architectural Finishing 20136 <br />221 <br />99 <br />68 <br /><1 <br />19 <br />6 <br />Exceed Threshold? <br />Yes <br />Yes <br />No <br />No <br />No <br />No <br />Phase II <br />Fine Grading & Soil Prep 2018 <br />2 <br />15 <br />13 <br /><1 <br />2 <br />1 <br />Site Trenching & Foundation Excavation 2018 <br />4 <br />22 <br />19 <br /><I <br />3 <br />1 <br />Building Construction 2018 <br />4 <br />20 <br />25 <br /><1 <br />11 <br />1 <br />Building Construction 2019 <br />4 <br />18 <br />25 <br /><1 <br />10 <br />1 <br />Concrete Transit Mix - For Footings /Slabs 2019 <br />1 <br />4 <br />4 <br /><1 <br />5 <br /><1 <br />Architectural Finishing 2019 <br />83 <br />2 <br />2 <br /><1 <br /><1 <br /><1 <br />SCAQMD Localized Significance Threshold (2 acres) <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Fine Grading, Bldg Construction & Architectural <br />Finishing 2019r <br />89 <br />36 <br />40 <br /><1 <br />12 <br />2 <br />Exceed Threshold? <br />Yes <br />No <br />No <br />No <br />No <br />No <br />Notes: <br />Construction emission calculation worksheets are included in Appendix A. <br />a PM10 emissions estimates take into account compliance with SCAQMD Rule 403 requirements for <br />fugitive dust suppression, which require that no visible dust be present beyond the site boundaries, <br />as well as the use of EPA Tier 2 equipment. <br />b lmplementation of Excavation & Soils Import and Rough Grading & Bldg Pad Prep 2012; and Fine <br />Grading, Bldg Construction, Asphalt Parking Lots & Architectural Finishing 2013 within Phase 1 have <br />the potential to overlap, thus emissions are summed. <br />Implementation of Fine Grading, Bldg Construction & Architectural Finishing 2019 within Phase II <br />have the potential to overlap, thus emissions are summed. <br />Source: ICF 2012. <br />The Academy Charter High School June 2012 <br />initial Study /Mitigated Negative Declaration 3 -22 ICF 90914.11 <br />' 00� <br />