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City of Santa Ana -Park View at Town and Country Manor <br />Draft EIR <br />result from onsite and offsite activities. Onsite emissions principally consist of exhaust emissions <br />(NOx, SOx, CO, VOC, PMT,, and PM,.,) from heavy -duty construction equipment, motor vehicle <br />operation, and fugitive dust (mainly PMT,) from disturbed soil. Additionally, paving operations and <br />application of architectural coatings will release VOC emissions. Offsite emissions are caused by <br />motor vehicle exhaust from delivery vehicles, worker traffic, and road dust (PMT, and PM,.,). <br />The emission estimates were derived using the ARB LTRBEMIS2007 Version 9.2.4 emission model <br />using the assumptions described in the Air Quality Analysis Report (Appendix B). The emissions are <br />shown in Table 4.2 -4. As shown in the table, VOC and NOx emissions would be exceeded. <br />Therefore, without mitigation, the short-term emissions are considered to have a significant regional <br />impact. <br />Table 4.2.4: Construction Emissions <br />Operational Emissions <br />Operational, or long -term, emissions occur over the life of the project. Operational emissions include <br />mobile and area source emissions. Area source emissions are from consumer products, heaters that <br />consume natural gas, gasoline- powered landscape equipment, and architectural coatings (painting). <br />Mobile emissions from motor vehicles are the largest single long -term source of air pollutants from <br />the project. <br />4.2 -14 Michael Brandman Associates <br />H\Cl t(PN- Rnb327b327W3MMVB270030 Sec 2AvQ ity.D <br />VOC <br />2.7 <br />Emissions <br />NO, <br />27.2 <br />(pounds per day) <br />CO s0, <br />13.5 <0.1 <br />PM�o <br />1 22.5 <br />5.7 <br />Demolition <br />Mass grading and excavation of soil <br />9.8 <br />90.4 <br />42.1 <br /><0.1 <br />27.8 <br />8.9 <br />Trenching <br />2.0 <br />16.5 <br />9.1 <br /><0.1 <br />0.8 <br />0.8 <br />Building (2011) <br />27.6 <br />323.0 <br />123.2 <br /><0.1 <br />10.2 <br />9.4 <br />Building (2012) <br />25.6 <br />300.0 <br />115.2 <br /><0.1 <br />9.4 <br />8.6 <br />Building, Asphalt Paving, and <br />Coating <br />312.0 <br />328.3 <br />137.7 <br /><0.1 <br />11.9 <br />10.8 <br />Maximum Daily Emissions <br />312.0 <br />328.3 <br />137.7 <br /><0.1 <br />27.8 <br />10.8 <br />Significance Threshold <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Significant Impact? <br />Yes <br />Yes <br />No <br />No <br />No <br />No <br />Note: <br />The maximum daily emissions refer to the maximum emissions that would occur in one day. <br />Emissions of PM, and PM2.5 assume compliance with the requirements of SCAQMD Rule 403. <br />VOC = volatile organic compounds NOx = nitrous oxides CO = carbon monoxide <br />SOx = sulfur oxides PM, and PM2.5 = particulate matter <br />Source: Michael Brundman Associates, Air Quality Impact Analysis Report, 2009. <br />Operational Emissions <br />Operational, or long -term, emissions occur over the life of the project. Operational emissions include <br />mobile and area source emissions. Area source emissions are from consumer products, heaters that <br />consume natural gas, gasoline- powered landscape equipment, and architectural coatings (painting). <br />Mobile emissions from motor vehicles are the largest single long -term source of air pollutants from <br />the project. <br />4.2 -14 Michael Brandman Associates <br />H\Cl t(PN- Rnb327b327W3MMVB270030 Sec 2AvQ ity.D <br />