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Specifically,the number and length of vehicle trips is utilized to estimate the vehicle miles travelled ("VMT") <br /> associated with construction. Then, utilizing vehicle-class specific EMFAC 2014 emission factors, CaIEEMod <br /> calculates the vehicle exhaust, evaporative, and dust emissions resulting from construction-related VMT, <br /> including personal vehicles for worker commuting.4 <br /> Specifically, in order to calculate VMT, CaIEEMod multiplies the average daily trip rate by the average overall trip <br /> length (see excerpt below): <br /> "VMTd =F(Average Daily Trip Rate; * Average Overall Trip Length ;) n <br /> Where: <br /> n = Number of land uses being modeled."' <br /> Furthermore, to calculate the on-road emissions associated with worker trips, CaIEEMod utilizes the following <br /> equation (see excerpt below): <br /> "Emisslonspollutant=VMT * EFrunning,pollutant <br /> Where: <br /> Emissionspollutant=emissions from vehicle running for each pollutant <br /> VMT=vehicle miles traveled <br /> EFrunning,pollutant=emission factor for running emissions."' <br /> Thus,there is a direct relationship between trip length and VMT, as well as a direct relationship between VMT <br /> and vehicle running emissions. In other words, when the trip length is increased, the VMT and vehicle running <br /> emissions increase as a result. Thus, vehicle running emissions can be reduced by decreasing the average overall <br /> trip length, by way of a local hire requirement or otherwise. <br /> Default Worker Trip Parameters and Potential Local Hire Requirements <br /> As previously discussed,the number, length, and vehicle class of worker trips are utilized by CaIEEMod to <br /> calculate emissions associated with the on-road vehicle trips required to transport workers to and from the <br /> Project site during construction! In order to understand how local hire requirements and associated worker trip <br /> length reductions impact GHG emissions calculations, it is important to consider the CaIEEMod default worker <br /> trip parameters. CaIEEMod provides recommended default values based on site-specific information, such as <br /> land use type, meteorological data, total lot acreage, project type and typical equipment associated with project <br /> type. If more specific project information is known, the user can change the default values and input project- <br /> specific values, but the California Environmental Quality Act ("CEQA") requires that such changes be justified by <br /> substantial evidence.'The default number of construction-related worker trips is calculated by multiplying the <br /> 4"Appendix A Calculation Details for CaIEEMod."CAPCOA,October 2017,available at:http://www.agmd.gov/docs/default- <br /> source/caleemod/02 appendix-a2016-3-2.pdf?sfvrsn=6, p. 14-15. <br /> 5"Appendix A Calculation Details for CaIEEMod."CAPCOA,October 2017, available at:http://www.agmd.gov/docs/default- <br /> source/caleemod/02 appendix-a2016-3-2.pdf?sfvrsn=6, p.23. <br /> 6"Appendix A Calculation Details for CaIEEMod."CAPCOA,October 2017, available at:http://www.agmd.gov/docs/default- <br /> source/caleemod/02 appendix-a2016-3-2.pdf?sfvrsn=6, p. 15. <br /> "CaIEEMod User's Guide."CAPCOA, November 2017, available at:http://www.agmd.gov/docs/default- <br /> source/caleemod/01 user-39-s-guide2016-3-2 15november2017.pdf?sfvrsn=4, p.34. <br /> $CaIEEMod User Guide,available at:http://www.caleemod.com/, p. 1,9. <br /> 2 <br />