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Environmental Checklist Greenhouse Gas Emissions <br /> Initial Study – Mitigated Negative Declaration 43 <br />municipal solid waste in California was primarily based on data provided by the California <br />Department of Resources Recycling and Recovery (CalRecycle). <br />Emissions from water and wastewater usage calculated in CalEEMod were based on the default <br />electricity intensity from the CEC’s 2006 Refining Estimates of Water-Related Energy Use in <br />California using the average values for Northern and Southern California. <br />For mobile sources, CO2 and CH4 emissions were quantified in CalEEMod. Because CalEEMod does <br />not calculate N2O emissions from mobile sources, N2O emissions were quantified using the <br />California Climate Action Registry General Reporting Protocol (CCAR 2009) direct emissions factors <br />for mobile combustion (Appendix C). Estimates of vehicle trips associated with the proposed <br />development are based on trip generation rates from the project Traffic Impact Analysis (Appendix <br />F), which developed trip generation rates based on the Institute of Transportation Engineers 9th <br />Edition Trip Generation Manual. The estimate of total daily trips was calculated and extrapolated to <br />derive total annual mileage in CalEEMod. Emission rates for N2O emissions were based on the <br />vehicle mix output generated by CalEEMod and the emission factors found in the California Climate <br />Action Registry General Reporting Protocol. <br />Construction Emissions <br />CalEEMod was used to estimate emissions associated with the construction period. Construction of <br />the project would generate temporary GHG emissions primarily due to the operation of <br />construction equipment and truck trips. Site preparation and grading typically generate the greatest <br />amount of emissions due to the use of grading equipment and soil hauling. Although construction <br />activity is addressed in this analysis, CAPCOA does not discuss whether any of the suggested <br />threshold approaches adequately address impacts from temporary construction activity. As stated <br />in the CEQA and Climate Change white paper, “more study is needed to make this assessment or to <br />develop separate thresholds for construction activity” (CAPCOA 2008). The BAAQMD does not have <br />adopted thresholds of significance for construction-related GHG emissions. However, BAAQMD <br />recommends that lead agencies quantify and disclose GHG emissions that would occur during <br />construction. <br />Impact Analysis <br />a. Would the project generate GHG emissions, either directly or indirectly, that may have a <br />significant impact on the environment? <br />Construction Emissions <br />As discussed above, BAAQMD does not have thresholds of significance for construction-related GHG <br />Emissions. Nonetheless, emissions are estimated in CalEEMod and disclosed per BAAQMD <br />recommendations. Emissions of metric tons (MT) of CO2e generated by construction of the project <br />are estimated at 370 MT of CO2e. <br />Operational Indirect and Stationary Direct Emissions <br />Long-term emissions relate to area sources, energy use, solid waste, water use, and transportation. <br />Each of the operational sources of emissions is discussed further below. Operational emissions for <br />both the project and existing onsite uses were modeled using CalEEMod. Net new operational <br />emissions (project emissions minus existing onsite uses emissions) were compared to the BAAQMD <br />thresholds. <br />340