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Draft Environmental Impact Report Page IV.D-16 Forward Landfill Expansion • Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard(including releasing emissions which exceed quantitative thresholds for ozone precursors); • Expose sensitive receptors to substantial pollutant concentrations;or • Create objectionable odors affecting a substantial number of people. Also, to address greenhouse gas emissions, the proposed project may be deemed to have a significant effect on the environment if it would: • Conflict with or obstruct implementation of the California Global Warming Solutions Act of 2006 (AB32). Consistent with CEQA Guidelines Appendix G,the SJVAPCD has established thresholds of significance that may be relied upon in assessing construction impacts, project operations and cumulative impacts. For construction impacts, the pollutant of greatest concern to the District is PM10. The SJVAPCD recommends that significance be based on a consideration of the control measures to be implemented during project construction. Compliance with Regulation { VIII, Rule 8011, and implementation of appropriate mitigation measures to control respirable particulate matter emissions are considered by the SJVAPCD to be sufficient to render a project's construction-related impacts less than significant. The SJVAPCD Guide for Assessing and Mitigating Air Quality Impacts contains a list of feasible control measures for construction-related PM10 emissions. The SJVAPCD's GAMAQI also includes significance criteria for evaluating operational- phase emissions from direct and indirect sources associated with a project. Indirect sources include motor vehicle traffic resulting from the project and do not include stationary sources covered under permit with the SJVAPCD. For this analysis, the project would be considered to have a significant effect on the environment if it would exceed the following thresholds: • Cause a net increase in pollutant emissions of reactive organic gases(ROG), NO, or PM10 exceeding 10 tons per year. • Cause a violation of state CO concentration standards.The level of significance of CO emissions from mobiles sources is determined by modeling the ambient concentration under project conditions, and comparing the resultant 1-and 8-hour concentrations to the respective state CO standards of 20.0 and 9.0 parts per million. { & Cause "visible dust emissions" due to onsite operations and thereby violate SJVAPCD Regulation VIII. Cancer Risk Cancer risk is defined as the lifetime probability of developing cancer from exposure to k carcinogenic substances. Cancer risks are expressed as the chances in one million of contracting cancer, for example one cancer case among one million people exposed. Incremental cancer risks are determined by summing the individual risk for each TAC. A project is considered to have a significant cancer risk if the incremental cancer risk at a receptor exceeds 10 in a million. This is consistent with regulation under AB 2588 as well