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4.5 – Greenhouse Gas Emissions Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.5-27 road equipment and off-site sources such as vendor trucks and worker vehicles. Table 4.5-3 presents construction emissions for the Project in 2021 and 2022 from on-site and off-site emission sources. Table 4.5-3. Estimated Annual Construction Greenhouse Gas Emissions – Unmitigated Year CO2 CH4 N2O CO2e Metric Tons per Year 2021 285.70 0.06 0.00 287.26 2022 168.02 0.03 0.00 168.70 Total 455.96 Notes: CO2 = carbon dioxide; CH4 = methane; N2O = nitrous oxide; CO2e = carbon dioxide equivalent. See Appendix B for complete results. The values shown are the annual emissions reflect California Emissions Estimator Model “mitigated” output. Totals may not add due to rounding. As shown in Table 4.5-3, the estimated total GHG emissions during construction would be approximately 456 MT CO2e over the construction period. Estimated Project-generated construction emissions amortized over 30 years would be approximately 15 MT CO2e per year. As with Project-generated construction criteria air pollutant emissions, GHG emissions generated during construction of the Project would be short term, lasting only for the duration of the construction period, and would not represent a long-term source of GHG emissions. Operational Emissions Operation of the Project would generate GHG emissions through passenger vehicle and delivery truck trips to and from the Project site; landscape maintenance equipment operation; energy use (natural gas and generation of electricity consumed by the Project); solid waste disposal; generation of electricity associated with the water pump; an on-site septic system; and a yard truck, forklifts, and a diesel-fueled fire pump. CalEEMod and a spreadsheet model were used to calculate the annual GHG emissions based on the operational assumptions described in Section 4.5.3. The estimated operational Project-generated GHG emissions are shown in Table 4.5-4. Table 4.5-4. Estimated Annual Operational Greenhouse Gas Emissions Emission Source CO2 CH4 N2O CO2e Metric Tons per Year Area 0.02 <0.01 0.00 0.02 Energy 567.70 0.05 0.01 573.12 Mobile 8,857.25 0.06 1.23 9,226.53 Solid waste 139.43 8.24 0.00 345.43 Water supply and wastewater 0.00 38.25 0.13 994.80 Stationary 5.71 0.00 0.00 5.73 Fuel storage tank 0.00 0.00 0.00 0.00 Off-road 1,321.85 0.42 0.00 1,332.73 Amortized 30-Year Construction Emissions 15.20 Operation plus Amortized Construction Total 12,493.57 Notes: CO2 = carbon dioxide; CH 4 = methane; N2O = nitrous oxide; CO2e = carbon dioxide equivalent; <0.01 = reported emissions less than 0.01. See Appendix B for complete results. Totals may not add due to rounding.