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' BENDER READY-MIX CONCRETE MANUFACTURING PROJECT Initial Study/Mitigated Negative Declaration Project-Related Sources of Greenhouse Gases w I Direct project-related GHG emissions include emissions from construction activities, area sources, and mobile sources. Table 4.7-1, Estimated Greenhouse Gas Emissions, presents the estimated C02, N20, and CH4 emissions of the proposed project. GHG emissions from construction are typically amortized over the lifetime of the project (30 years) and added to the operational emissions.4 As seen in Table 4.7-1, the proposed project would result in a total of 7.25 MTC02eq/yr from construction activities. Following construction, no other GHG emissions would result with project implementation, as no new vehicle trips would result and no new stationary sources are proposed. However, GHG emissions associated with the existing facility operations have been quantified and are presented in Table 4.7-1. GHGs associated with area sources and mobile sources are 160.00 MTC02eq/yr and 295.80 MTC02eq/yr, respectively. Total project-related direct operational emissions equate to 456.22 MTC02eq/yr. Table 4.7-1 Estimated Greenhouse Gas Emissions a?,.'?a' ?N .p?CVz.? ;Y # 4+t?jQ yK r?7.G.r t C1 F{ elrlc Eric ->>Tons,:, c lNf?c?Tons tonsryr of, py/yrzt 5 tijnalyr efC rz a^CO:edtyr.- DIRECT EMISSIONS Construction Emissions' 2011 6.50 0,00 0.01 0.00 0.74 7.25 Total Amortized Construction Emissions (30 years) 0.22 0.00 0.00 0.00 0.20 0.42 Area Source Emissions 160.00 0.00 0.00 0.00 0.00 160.00 Mobile Source Emissions' 273.0 0.07 22.49 0.01 0.31 295.80 INDIRECT EMISSIONS Electricity Consumption 8.85 0.00 0.03 0.00 0.01 8.89 Water Supply 0.36 0.00 0.00 0.00 0.00 0.36 Total Project-Related GHG Emissions 465.47 MTCOseq/yr GHG Threshold of Significance 1,100 MTCO:eq/yr Significance of Impact Less Than Significant Notes: 1. Emissions calculated using CARB's Construction Equipment Emissions Table and the URBEMIS 2007 computer model. 2. C02 Equivalent values calculated using the U.S. Environmental Protection Agency Website, Greenhouse Gas Equivalencies Cakulator, htt _ p:/hvww.epa.gov/cleanenergy/energy-resources/gkulator.html, accessed January 2011. r Refer to Appendix A, Air QualitylGreenhouse Gases Data, for detailed model imut(outout data. Indirect Project-Related Sources of Greenhouse Gases Electricity Consumption Energy Consumption emissions were calculated using the South Coast Air Quality Management District's (SCAQMD) CEQA Air Quality Handbook,5 the U.S. Energy Information Administration ,6 and project-specific land use data. The emission factors for electricity use (771.62 pounds of C02 per megawatt hour [MWh], 0.00659 pounds of N20 per MWh, and 0.4037 pounds of CH4 per MWh) were 4 The project lifetime is based on the standard 30 year assumption of the South Coast Air Quality Management District (http:/hvww.agmd.gov/hb/2008/December/081231 a.htm). 5 SCAQMD's CEQA Air Quality Handbook, Table A9-11, November 1993. 6 U.S. Energy Information Administration, Domestic Electricity Emissions Factors 1999-2002. JULY 2011 4,7-3 GREENHOUSE GASES 31A-59