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BENDER READY -MIX CONCRETE MANUFACTURING PROJECT ' Initial Study /Mitigated Negative Declaration 1 Area Source Emissions v �J PI LJ Area source emissions are generated from electrical energy and natural gas consumption. The primary use of natural gas by the facility is for combustion to produce space heating, water heating, and other miscellaneous heating or air conditioning sources. It is noted that the facility has obtained the required permits from the SCAQMD for on -site cement storage tanks, concrete batch equipment, and a dry filter. The project would not result in any new stationary sources and would not generate any new trips. As indicated in Table 4.3 -2, Operational Air Emissions, emissions generated by vehicle traffic and area source emissions do not exceed established SCAQMD thresholds for SOx, ROG, CO, NOx, PM1o, and PM2.5. As the total operational (mobile and area sources) emissions for the proposed project do not exceed SCAQMD thresholds, air quality impacts from operations are less than significant. Mitigation Measures: No mitigation is required. Table 4.3 -2 Operational Air Emissions r AP Area Source Emissions 0.22 0.83 2.23 0.00 0.01 0.01 Vehicle Emissions 0.59 4.69 7.46 0.02 1.78 0.45 Total Emissions 0.81 5.52 9.69 0.02 1.79 0.46 SCAQMD Thresholds 55 55 550 150 150 55 Thresholds Exceeded? No No No No No No Notes; ROG = reactive organic gases; NOx = nitrogen oxides; CO = carbon monoxide; S02 = sulfur dioxide; PM10 = particulate matter; up to 10 microns; PMz,s = particulate matter; up to 2.5 microns 1. Based on URBEMIS 2007 (version 9.2.4) modeling results, worst-case seasonal emissions for area and mobile emissions have been modeled. 2. Area Source emissions exclude the use of fireplaces and wood burning stoves. Refer to Appendix A, Air QualitylGreenhouse Gases Data. C) 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)? Less Than Significant Impact. IJULY 2011 CUMULATIVE CONSTRUCTION IMPACTS With respect to the proposed projects construction -period air quality emissions and cumulative Basin - wide conditions, the SCAQMD has developed strategies to reduce criteria pollutant emissions outlined in the 2007 AQMP pursuant to Federal Clean Air Act mandates. As such, the proposed project would comply with SCAQMD Rule 403 requirements, and implement all feasible mitigation measures. Rule 403 requires that fugitive dust be controlled with the best available control measures in order to reduce dust so that it does not remain visible in the atmosphere beyond the property line of the proposed project. In addition, the proposed project would comply with adopted 2007 AQMP emissions control measures. Per SCAQMD rules and mandates, as well as the CEQA requirement that significant impacts be mitigated to the extent feasible, these same requirements (i.e., Rule 403 compliance, the implementation of all feasible mitigation measures, and compliance with adopted Air Quality Management Plan emissions control measures) would also be imposed on construction projects throughout the Basin, which would include related projects. 4.3 -5 i iki F.111 AIR QUALITY