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Vista Charter Public Schools District Office and Outdoor Space Project <br />CEQA Exemption 15183 <br />Table 3 <br />Estimated Greenhouse Gas Emissions <br />Source <br />CO2 <br />CH4 <br />N20 <br />Refrigerants <br />COze <br />Metric Tons/year' <br />Direct Emissions <br />Construction amortized over 30 ears <br />2.57 <br /><0.01 <br /><0.01 <br /><0.01 <br />2.58 <br />Area Source <br />0.14 <br /><0.01 <br /><0.01 <br /><0.01 <br />0.14 <br />Mobile Source <br />55.10 <br /><0.01 <br /><0.01 <br />0.01 <br />56.00 <br />Refrigerants <br />0.00 <br />0.00 <br />0.00 <br /><0.01 <br /><0.01 <br />Total Direct Emissions2 <br />57.81 <br /><0.01 <br /><0.01 <br /><0.01 <br />58.72 <br />Indirect Emissions <br />Energy <br />39.50 <br /><0.01 <br /><0.01 <br />0.00 <br />39.70 <br />Solid Waste <br />0.58 <br />0.06 <br />0.00 <br />0.00 <br />2.03 <br />Water Demand <br />2.48 <br />0.04 <br /><0.01 <br />0.00 <br />3.78 <br />Total Indirect Emissions2 <br />42.56 <br />0.10 <br /><0.01 <br />0.00 <br />45.51 <br />Total Project -Related Emissionsz <br />104.23 <br />GPU EIR GHG Significance Threshol'dsl <br />3,000 MTCO2e <br />Exceeds Thresholds? <br />No <br />Notes: <br />1. Emissions calculated using California Emissions Estimator Model Version 2022.1 (CaIEEMod) computer model and are based on 7,000 square <br />feet building area as a conservative analysis. <br />2. Totals may be slightly off due to rounding. <br />Refer to Attachment A, for detailed model in utlout ut data. <br />Direct Project -Related Sources of Greenhouse Gases <br />Construction Emissions. Construction GHG emissions are typically summed and amortized over <br />the lifetime of the project (assumed to be 30 years), then added to the operational emissions.19 <br />The project would comply with RR GHG-1 which restricts non -essential idling of construction <br />equipment and RR GHG-7 which ensures recycling and/or salvaging for reuse at minimum of 65 <br />percent of the nonhazardous construction and demolition waste generated during construction. <br />As shown in Table 3, the proposed project would result in 2.58 MTCO2e per year construction <br />emissions when amortized over 30 years (or a total of 77.3 MTCO2e in 30 years). <br />Area Source. Area source emissions were calculated using CaIEEMod and project -specific land <br />use data. Project -related area sources include natural gas consumption for space heating and <br />exhaust emissions from landscape maintenance equipment, such as lawnmowers, <br />shedders/grinders, blowers, trimmers, chain saws, and hedge trimmers used to maintain the <br />landscaping of the site. The project would directly result in 0.14 MTCO2e per year from area <br />source emissions; refer to Table 3. <br />Mobile Source. CaIEEMod relies upon trip generation rates from the Vista Heritage Global <br />Academy Expansion Trip Generation Assessment prepared by Urban Crossroads and dated July <br />24, 2023. The proposed project would generate 84 average daily trips without taking trip reduction <br />from the existing uses on -site as they are currently vacant. The project would result in <br />19 The project lifetime is based on the standard 30-year assumption of the South Coast Air Quality Management District <br />(South Coast Air Quality Management District, Draft Guidance Document - Interim CEQA Greenhouse Gas (GHG) <br />Significance Threshold, October 2008). <br />Dec I y ouncil 26 - 90 1/16/202 e 30 <br />