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Proposed Costco Wholesale Redwood City GDF Expansion 7.B. - Page 199 <br /> Air Quality/Climate Change Analysis <br /> Appendix B: Operation Emission Calculations <br /> Table B-1. Operation Emissions-Summary. <br /> 2. Source for BAAQMD significance thresholds: Bay Area Air Quality Management District,California Environmental Quality <br /> Act Air Quality Guidelines, May 2011, Sections 2.1 (Criteria Air Pollutants and Precursors-Project Level)and 2.2 <br /> (Greenhouse Gases-Project Level). <br /> 3. For criteria pollutants associated with project operation,the CEQA baseline(against which project impacts are compared <br /> for analysis of air quality impacts)is considered to be the 16-position gasoline dispensing facility(GDF)evaluated in the <br /> Final Environmental Impact Report certified in June 2007(2007 Certified EIR). Thus,criteria pollutant emission changes <br /> associated with the proposed project reflect the difference in emissions between the proposed 20-position GDF and the <br /> 16-position GDF evaluated in the 2007 Certified EIR. <br /> 4. For greenhouse gas(GHG)emissions associated with project operation,the CEQA baseline is considered to be the <br /> existing 12-position GDF. Thus, GHG emission changes associated with the proposed project reflect the difference in <br /> emissions between the proposed 20-position GDF and the existing 12-position GDF. <br /> 5. Conversion factors: <br /> Global warming potential for methane: 21 <br /> Global warming potential for nitrous oxide: 310 <br /> Page 2 Date: 7/30/2012 <br />