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Administrative Draft Environmental Impact Report Gill Medical Center Project increases in emissions would be predominantly associated with motor vehicle use.Table 4.5-6 summarizes operational emissions from the Proposed Project. The SJVAPCD's (2015) Guidance for Assessing and Mitigation of Air Quality Impacts identifies significance thresholds for ROG, CO, and NOx, SO2, PM10, and PM2.5. Operational-generated area source and energy source emissions associated with the Proposed Project were calculated using CalEEMod. Operational mobile source emissions are calculated with EMFAC2017. Helicopter emissions are calculated based on the emission factors identified for a UH-1 N with two T400-CP-400 engines contained in the Air Force 2020 Mobile Emissions Calculations Guide (Air Force Civil Engineer Center 2020). The UH-1 N was chosen to represent a "worst-case" scenario per its similarity to the Airbus H145 which is the largest aircraft anticipated for transport to the Project site. Predicted maximum annual operational-generated emissions of criteria air pollutants for the Proposed Projects are summarized in Table 4.5-6. Table 4.5-6.Operational Emissions Emission Source Maximum Pollutants(tons per year) ROG NOx CO I S02 PM10 PM2.5 Proposed Project Annual Emissions Area 1.32 0.00 0.01 0.00 0.00 0.00 Energy 0.08 0.78 0.65 0.00 0.00 0.00 Mobile(automotive) 2.25 6.97 24.74 0.07 1.11 0.49 Mobile(helicopter operation) 0.02 0.05 0.05 0.01 0.002 0.002 Total 3.67 7.80 25.45 0.08 1.11 0.49 SJVAPCD Significance Threshold 10 10 100 27 15 15 Exceed SJVAPCD Threshold? No No No No No No Source: CaIEEMod version 2016.3.2;EMFAC2017.Refer to Attachment A for Model Data Outputs. Notes: Automobile emissions projections account for an automotive trip generation rate identified in the Traffic Impact Study prepared by KD Anderson and Associates(2020). As indicated in Table 4.5-6, operational-generated emissions would not exceed SJVAPCD significance thresholds. As previously mentioned, SJVAPCD Rule 9510 is intended to fulfill the region's emission reduction commitments in the SJVAPCD PM10 and Ozone Attainment Plans.The Proposed Project is subject to Rule 9510 and would be required to consult with the SJVAPCD regarding the specific applicability of Rule 9510 in relation to Project operations. In accordance with Rule 9510, the Project applicant would be required to prepare a detailed air impact assessment for submittal to the SJVAPCD demonstrating the reduction from the Project's baseline of NOx and PM10 emissions.The inability to meet or exceed Rule 9510 required Air Quality 4.5-18 October 2021