Laserfiche WebLink
*:/:11-3hWA <br />enjoyment of recreation. Industrial and commercial areas ace considered the least sensitive to air pollution. <br />Exposure periods are relatively short and intermittent, as the majority of the workers tend to stay indoors <br />most of the time. In addition, the working population is generally the healthiest segment of the public Both <br />Raiff Park (Site 1) and 6t1i Street Park (Site 2) are surrounded by residential land uses to the north, south, east, <br />and west of the park sites, resulting in the nearest sensitive receptor distances of 82 feet. <br />Methodology <br />Projected construction related air pollutant emissions are calculated using the California Emissions Estimator <br />Model (CalEEMocI, Version 2016.3.2. CaIEEMod compiles an emissions inventory of construction (fugitive <br />dust, off gas emissions, on road emissions, and off road emissions), area sources, indirect emissions from <br />energy use, mobile sources, indirect emissions from waste disposal (annual only), and indirect emissions from <br />water/wastewater (annual only) use. The calculated emissions of the project are compared to thresholds of <br />significance for individual projects using the SCAQMD's CEQA Air Quality Analysis Guidance Handbook <br />Thresholds of Significance <br />The analysis of the proposed project's air quality impacts follows the guidance and methodologies <br />recommended in SCAQMD's CEQA AirQuakty Handbook and the significance thresholds on SCAQMD's <br />website (SCAQMD 1993)J CEQA allows the significance criteria established by the applicable air quality <br />management or air pollution control district to be used to assess impacts of a project on air quality. <br />SCAQMD has established thresholds of significance for regional air quality emissions for construction <br />activities and project operation. In addition to the daily thresholds listed above, projects are also subject to the <br />AAQS. These are addressed though an analysis of localized CO impacts and localized significance thresholds <br />(LSTS). <br />REGIONAL SIGNIFICANCE THRESHOLDS <br />SCAQMD has adopted regional construction and operational emissions thresholds to determine a project's <br />cumulative impact on air quality in the SOCAB. Table 4, SCAQMD Significance Thresholds, lists SCAQMD's <br />regional significance thresholds that are applicable for all projects uniformly regardless of size or scope. <br />There is growing evidence that although ultrafine particulates contribute a very small portion of the overall <br />atmospheric mass concentration, they represent a greater proportion of the health risk from PM. However, <br />the EPA or CARB have not yet adopted AAQS to regulate ultrafine particulates; therefore, SCAQMD has not <br />developed thresholds for them. <br />7 SCAQMD's Au Qualify Significance Tbiesholds ao, current as of Mazcb 2015 and can be found here: http://�agrnd.gov/ceqa/hdbLhtn l <br />75C-151 <br />