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PA <br />BENDER READY -MIX CONCRETE MANUFACTURING PROJECT <br />F %-" Initial Study /Mitigated Negative Declaration <br />4.3 AIR QUALITY <br />Where aw,allable, the sl ntcance criteriahestablrshed "by 19 <br />Less Than ." <br />appllcable air qda My ,management or ar pollutâ–ºon "control <br />Potentially <br />Significant <br />Less Thart <br />No <br />"r. <br />district may . be relied " upon - to make the following <br />Significant <br />Impact <br />Impact With:_ <br />Mitigation <br />Significant <br />Impact <br />Impact <br />determ uld inations. Wo the project: <br />Incorporated <br />a. Conflict with or obstruct implementation of the applicable air <br />quality Ian? <br />b. Violate any air quality standard or contribute substantially to <br />an existing or projected air quality violation? <br />c. Result in a cumulatively considerable net increase of any <br />criteria pollutant for which the project region is non - attainment <br />under an applicable federal or state ambient air quality <br />standard (including releasing emissions which exceed <br />quantitative thresholds for ozone precursors)? <br />d. Expose sensitive receptors to substantial pollutant <br />concentrations? <br />e. Create objectionable odors affecting a substantial number of <br />people? <br />a) Conflict with or obstruct implementation of the applicable air quality plan? <br />Less Than Significant Impact <br />According to the CEQA Air Quality Handbook, in order to determine consistency with the South Coast <br />Air Quality Management District (SCAQMD) Air Quality Management Plan (AQMP) two main criteria <br />must be addressed. <br />Criterion 1: <br />With respect to the first criterion, SCAQMD methodologies require that an air quality analysis for a <br />project include forecasts of project emissions in relation to contributing to air quality violations and delay <br />of attainment. <br />a) Would the project result in an increase in the frequency or severity of existing air qualify <br />violations? <br />Since the consistency criteria identified under the first criterion pertain to pollutant <br />concentrations, rather than to total regional emissions, an analysis of the project's pollutant <br />emissions relative to localized pollutant concentrations is used as the basis for evaluating <br />project consistency. As discussed in Response 4.3(d), below, localized concentrations of CO, <br />NOx, PM,o, and PM2.5 would be less than significant. Therefore, the proposed project would <br />not result in an increase in the frequency or severity of existing air quality violations. Because <br />ROGs are not a criteria pollutant, there is no ambient standard or localized threshold for <br />ROGs. Due to the role ROG plays in ozone formation, it is classified as a precursor pollutant <br />and only a regional emissions threshold has been established. <br />JULY 2011 4.3 -1 AIR QUALITY <br />31A-39 <br />