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product of combustion in diesel engines. It is present at some concentration in all developed areas of the state. Other TACs are less common and are typically associated with industrial operations. As noted, the SJVAPCD is tasked with implementing regulations designed to attain ambient air quality standards. SJVAPCD regulations that are potentially applicable to the project are summarized below. Regulation VIII (Fugitive Dust PMIo Prohibitions) Rules 8011-8081 are designed to reduce PMIo emissions (predominantly dust/dirt) generated by human activity, including construction and demolition activities, road construction, bulk materials storage, paved and unpaved roads, carryout and track out, landfill operations, etc. Rule 4101 (Visible Emissions) This rule prohibits emissions of visible air contaminants to the atmosphere and applies to any source operation that emits or may emit air contaminants. Rule 9510 (Indirect Source Review) Rule 9510, also known as the Indirect Source Rule, is intended to reduce or mitigate construction and operational emissions of NO,, and PMIo generated by new development, either directly and/or by payment of off-site mitigation fees. Construction emissions of NO,, and PMIo exhaust must be reduced by 20% and 45%, respectively. Operational emissions of NOX and PMIo must be reduced by 33.3% and 50%, respectively. As Rule 9510 applies to residential projects of at least 50 units, it would apply to this project. In 2015, the SJVAPCD adopted a revised Guide for Assessing and Mitigating Air Quality Impacts. The Guide defines an analysis methodology, thresholds of significance, and mitigation measures for the assessment of air quality impacts for land development projects within SJVAPCD's jurisdiction. Table 3-2 shows the CEQA thresholds for significance for pollutant emissions within the SJVAPCD. The significance thresholds apply to emissions from both project construction and project operations. Environmental Impacts and Mitigation Measures a) Air Quality Plan Consistency. The California Emissions Estimator Model (CaIEEMod) was used to estimate both construction and operational emissions associated with the proposed project. The CaIEEMod results are shown in Appendix A of this document, and Table 3-2 shows the maximum project construction emissions in a calendar year and the annual operational emissions based on the CaIEEMod run. Pock Lane Public Review Draft IS/MND 3-9 May 2022