2014-069 - Final Environmental Impact Report No. 2014-01

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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR CITY OF SANTA ANA 5. Environmental Analysis AIR QUALITY Table 5.2 -4 Existing Land Uses Land Uses Dwelling Units/Building Square Feet Residential 739 DU Retail 633,878 BSF Service 815,346 BSF Other 505,037 BSF Notes: DU = dwelling unit; BSF = building square feet Sensitive Receptors Some land uses are considered more sensitive to air pollution than others due to the types of population groups or activities involved. Sensitive population groups include children, the elderly, the acutely ill, and the chronically ill, especially those with cardiorespiratory diseases. Residential areas are also considered sensitive to air pollution because residents (including children and the elderly) tend to be at home for extended periods of time, resulting in sustained exposure to any pollutants present. Other sensitive receptors include retirement facilities, hospitals, and schools. Recreational land uses are considered moderately sensitive to air pollution. Although exposure periods are generally short, exercise places a high demand on respiratory functions, which can be impaired by air pollution. In addition, noticeable air pollution can detract from the enjoyment of recreation. Industrial, commercial, retail, and office areas are considered the least sensitive to air pollution. Exposure periods are relatively short and intermittent, because the majority of the workers tend to stay indoors most of the time. In addition, the workforce is generally the healthiest segment of the population. The closest sensitive receptors to the project site are the residential, schools and parks in and along the project area. 5.2.2 Thresholds of Significance According to Appendix G of the CEQA Guidelines, a project would normally have a significant effect on the environment if the project would: AQ -1 Conflict with or obstruct implementation of the applicable air quality plan. AQ -2 Violate any au quality standard or contribute substantially to an existing or projected au quality violation. AQ -3 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). AQ -4 Expose sensitive receptors to substantial pollutant concentrations. AQ -5 Create objectionable odors affecting a substantial number of people. Page 5.2 -12 PlaceWorkr