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L S A FAIRVIEW BRIDGE REPLACEMENT AND STREET IMPROVEMENTS <br />(9TH STREET TO 16TH STREET) PROJECT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION <br />SANTA ANA, CALIFORNIA MAY 2020 <br />Table 3.3.B: Maximum Daily Project Construction Emissions without Mitigation <br />Project Phase <br />ROG <br />c0 <br />NOx <br />Total PMta <br />Total PM2.5 <br />Grubbing/Land Clearing(lbs/day) <br />2.47 <br />20.23 <br />28.14 <br />8.71 <br />1.67 <br />Grading/Excavation (Ibs/day) <br />17.10 <br />125.59 <br />198.35 <br />15.98 <br />8.52 <br />Drainage/Utilities/Subgrading(lbs/day) <br />10.86 <br />85.86 <br />118.05 <br />12.81 <br />5.55 <br />Paving(lbs/day) <br />2.89 <br />31.02 <br />29.87 <br />1.73 <br />1.64 <br />Maximum (Ibs/day) <br />17.10 <br />125.59 <br />198.35 <br />15.98 <br />8.52 <br />SCAQMD Threshold (maximum Ibs/day) <br />75.0 <br />550.0 <br />100.0 <br />150.0 <br />55.0 <br />Exceeds? <br />No <br />No <br />Yes <br />No <br />No <br />Source: Sacramento Metropolitan Air Quality Management District Road Construction Emissions Model (May 2018), compiled by LSA (July <br />2018). <br />CO = carbon monoxide PM.= particulate matter less than 10 microns in size <br />Ibs/day = pounds per day ROG = reactive organic gases <br />NOR = oxides of nitrogen SCAQMD = South Coast Air Quality Management District <br />PMz 5 = particulate matter less than 2.5 microns in size <br />Table 3.3.C: Maximum Daily Project Construction Emissions with Mitigation <br />Project Phase <br />ROG <br />c0 <br />NOx <br />Total PMva <br />Total PM2.5 <br />Grubbing/Land Clearing (Ibs/day) <br />1.39 <br />26.74 <br />4.94 <br />7.76 <br />1.77 <br />Grading/Excavation(lbs/day) <br />7.94 <br />150.72 <br />17.92 <br />8.54 <br />2.41 <br />Drainage/Utilities/Subgrading(lbs/day) <br />4.96 <br />95.18 <br />12.94 <br />8.23 <br />2.16 <br />Paving (Ibs/day) <br />1.82 <br />35.13 <br />9.10 <br />0.42 <br />0.32 <br />Maximum (Ibs/day) <br />7.94 <br />150.72 <br />17.92 <br />8.54 <br />2A1 <br />SCAQMD Threshold (maximum Ibs/day) <br />75.0 <br />550.0 <br />100.0 <br />150.0 <br />55.0 <br />Exceeds? <br />No <br />No <br />No <br />No <br />No <br />Source: Sacramento Metropolitan Air Quality Management District Road Construction Emissions Model (May 2018), compiled by LSA <br />(July 2018). <br />CO = carbon monoxide PM.= particulate matter less than 10 microns in size <br />Ibs/day = pounds per day ROG = reactive organic gases <br />NO. = oxides of nitrogen SCAQMD = South Coast Air Quality Management District <br />PM2.5 = particulate matter less than 2.5 microns in size <br />As shown in Table 3.3.C, with the implementation of standard construction measures (providing <br />50 percent effectiveness) such as frequent watering (e.g., a minimum of twice per day) as well <br />as other emission reduction methods specified in Mitigation Measure AQ-1, all criteria pollutant <br />emissions would be below SCAQMD daily thresholds. Fugitive dust, exhaust, and NOR emissions <br />from construction activities would not result in a cumulatively considerable net increase of any <br />criteria pollutant for which the Project region is nonattainment under an applicable federal or <br />State ambient air quality standard. Therefore, impacts would be less than significant with <br />mitigation incorporated. <br />Long -Term (Operational) Emissions. The purpose of the proposed Project is to improve <br />pedestrian/bicyclist safety and traffic flow on and in the vicinity of the Fairview Street bridge. <br />The proposed Project would not construct or permit the construction of any trip -generating land <br />uses. Because the Project would add lane capacity to the Fairview Street bridge, some traffic <br />currently using other routes would use the widened Fairview Street bridge, which would <br />3-10 7 5844ND\Final ISMND\Fairview Street Bridge Final ISMND.d.C. (05/26/20) <br />