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<br />c. Result in a cumulatively considerable net increase of any <br />criteria pollutant for which the project region is non- <br />attainment under an applicable federal or state ambient air <br />quality standard? <br /> <br />Less Than Significant Impact <br /> <br />As mentioned previously, the South Coast Air Quality Management <br />District (SCAQMD) regulates air quality pollutants in the South <br />Coast Air Basin. Pollutants for which ambient standards have <br />been set are referred to as criteria pollutants. Criteria <br />pollutants include Ozone (03), Carbon Monoxide (CO), Nitrogen <br />Dioxide (N02) , Sulfur Dioxide (S02), and Particulate Matter <br />(PM10). The South Coast Air Basin is currently a non-attainment <br />area for Carbon Monoxide, Ozone and particulate Matter. The <br />SCAQMD considers an air quality impact to be significant if it <br />exceeds the criteria pollutant thresholds identified in the <br />Table A-1. <br /> <br />Table A-l <br />Emission Thresholds of Significance <br /> <br /> Project <br />Pollutant Construction Tons/ Operations <br /> Pounds/Day Quarter Pounds/Day <br />Carbon Monoxide 550 24.75 550 <br />Reactive Organic <br />Compounds 75 2.5 55 <br />Nitrogen Oxides 100 2.5 55 <br />Particulate <br />Matter 150 6.75 150 <br /> <br />Long-term Operational Air Quality Impacts <br /> <br />The primary source of operational emissions would be generated <br />by vehicle travel to and from the project site. A relatively <br />minor amount of gaseous emissions would also occur from natural <br />gas and electricity usage. Summarized in Table A-2 are the <br />project-related operational emissions for on-road mobile sources <br />and stationary sources for the proposed First Street Medical <br />Building. <br /> <br />7 <br /> <br />3~Ato? 1 <br />