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5.0 Environmental Analysis 5.5 Air Quality <br />Avion Project SEIR <br />Page 5.5-9 <br />The growth projections used by the SDAPCD to develop the RAQS emissions budgets are based on <br />the population, vehicle trends, and land use plans developed in general plans and used by SANDAG <br />in the development of the regional transportation plans and sustainable communities strategy. As <br />such, projects that propose development that is consistent with the growth anticipated by SANDAG’s <br />growth projections and/or the general plan would be consistent with the RAQS. In the event that a <br />project would propose a development that is less dense than that associated with the General Plan, <br />the project would likewise be consistent with the RAQS. In the event a project proposes <br />development that is greater than anticipated in the growth projections, further analysis would be <br />warranted to determine if the project would exceed the growth projections used in the RAQS for the <br />specific subregional area. <br />The project is consistent with the Black Mountain Ranch Subarea Plan. The project site was <br />designated for development of 117 dwelling units, including a requirement for 19 affordable units, <br />in the 1998 EIR (96-7902) to which this SEIR is tiered. The project would develop 84 detached multi- <br />family residential units and associated streets, which would be consistent with the land use <br />identified for the project site in the 1998 EIR (96-7902). Project density on-site would be less than <br />what was assumed and analyzed for the property under the 1998 EIR, and the project would <br />transfer the remaining density (19 affordable housing units and 14 market-rate units) to the Black <br />Mountain Ranch North Village Town Center, pursuant to the density transfer allowances established <br />by the Subarea Plan. Therefore, the project would be consistent with the Transportation Phasing <br />Plan for buildout of the Subarea Plan, and would be consistent with the growth assumptions <br />assumed in the RAQS. <br />5.5.4 Issue 1 Air Quality Violations (Construction) <br />• Would the project result in a violation of any air quality standard or contribute substantially <br />to an existing or projected air quality violation? <br />5.5.4.1 Threshold <br />As stated in Appendix G of the California Environmental Quality Act (CEQA) Guidelines, “significance <br />established by the applicable air quality management or air pollution control district may be relied <br />upon.” The City’s air quality significance determination thresholds are established by the SDAPCD. <br />The SDAPCD sets forth quantitative emission thresholds for stationary sources. Project-related air <br />quality impacts would be considered significant if any of the applicable significance thresholds <br />presented herein are exceeded. <br />For CEQA purposes, these screening criteria can be used as numeric methods to demonstrate that a <br />project’s total emissions would not result in a significant impact to air quality. Significance <br />thresholds are listed in Table 5.5-2.