14 ATTACHMENT 6 - Appendix A - E

Summary of 2018 Spotorno Ranch Air Quality Analysis March 22, 2021 Page 3 The proposed project would result in an increase of housing units over the existing allowable units for the Spotorno Flat Area. However, the redesignation of the PUD-MDR designated portion of the Spotorno Upper Valley Area to Open Space/Agriculture would result in a decrease of 75 units in the Spotorno Upper Valley Area and would result in the buildout of 58 fewer homes than initially anticipated by the HVSP. As such, the proposed project would not result in a substantial unplanned increase in population, employment, or regional growth in vehicle miles traveled. Therefore, emissions related to development of the project site would have been included in growth forecasts for the current AQP as Low Density Residential, Medium Density Residential, and Open Space—Public Health and Safety, and implementation of the project would not result in substantial new regional emissions not foreseen in the air quality management planning process. Contribution to Air Quality Violations A measure for determining if the project is consistent with the air quality plans is ensuring the project would not result in an increase in the frequency or severity of existing air quality violations, cause or contribute to new violations, or delay timely attainment of air quality standards or the interim emission reductions specified in the air quality plans. This measure is determined by evaluating the project in view of the regional and localized thresholds identified by the District for Regional and Local Air Pollutants, which are used in this SEIR to evaluate Impacts AIR-2 through AIR-5. Buildout of the proposed project would not be in violation with regional and localized thresholds after implementation of Mitigation Measure (MM) AIR-2 and AIR-4, and therefore is consistent with Criterion 1 with incorporated mitigation. Criterion 2. Include Applicable AQP Control Measures The 2017 Clean Air Plan (2017 CAP) aims to reduce air pollutants and greenhouse gases (GHGs) at the local and regional level and includes a number of control measures to protect the climate and promote mixed use, compact development to reduce vehicle emissions and human exposure to pollutants from stationary and mobile sources. None of these stationary or mobile source control measures directly apply to the proposed project, therefore, the proposed project would generally support the overall goals of the CAP. However, it is expected that any future residents who would use transit would drive to transit stations as continuous pedestrian connections are not provided to transit stops from the project site. The project would be consistent with all applicable measures in the 2017 CAP including energy efficiency, renewable energy, and urban heat island mitigation and shade tree planting. Therefore, the proposed project would include applicable control measures from the 2017 CAP and is consistent with Criterion 2. Criterion 3. Disrupt or Hinder Implementation of any AQP Control Measures The project would not preclude extension of a transit line or bike path, propose excessive parking beyond parking requirements, or otherwise create an impediment or disruption to implementation of any AQP control measures. Because the project would not disrupt or hinder implementation of any AQP control measures, the project is therefore consistent with Criterion 3.