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SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR <br />CITY OF SAN LEANDRO <br />AIR QUALITY <br />Construction Exhaust Emissions <br />Construction emissions are based on the preliminary construction schedule developed for the Project. <br />The Project site would be developed in up to three construction phases; however, the balance of the <br />office uses may be developed in Phase 2. Because condensing the Project construction activities into two <br />development phases would generate higher average daily construction emissions, air quality modeling is <br />conservatively based on a two -phased development. The first phase would include redevelopment along <br />the shoreline on the western portion of the site and the library on Fairway Drive. The second phase <br />encompasses the inland residential development within the Marina Golf Course and the balance of the <br />office land uses within the office park. The Spinnaker Yacht Club may remain on-site and be repurposed or <br />replaced as the proposed Aquatic Center. The Project would be developed based on the market demand <br />for the proposed non-residential and residential Project components. Phase 1 could commence as early as <br />2016 and is estimated to take approximately three and one-half years to complete. Phase 2 would <br />commence following completion of Phase 1 and could commence as early as 2020 and is estimated to <br />take approximately one and a half years to complete. Buildout of the Project is forecast to occur as early <br />as 2021.39 <br />To determine potential construction -related air quality impacts, criteria air pollutants generated by <br />Project -related construction activities are compared to the BAAQMD significance thresholds in Table 4.2-5 <br />for average daily emissions. Average daily emissions are based on the annual construction emissions <br />divided by the total number of active construction days. As shown in Table 4.2-6, criteria air pollutant <br />emissions from construction equipment exhaust would not exceed the BAAQMD average daily thresholds. <br />Consequently, construction -related criteria pollutant emissions from exhaust are less than significant. <br />Fugitive Dust <br />As identified above, the Project would warrant substantial asphalt and some minor building demolition. In <br />addition, ground -disturbing activities would generate fugitive dust. Fugitive dust emissions (PM10 and <br />PM2.5) are considered to be significant unless the Project implements the BAAQMD's Best Management <br />Practices (BMPs) for fugitive dust control during construction. PM10 is typically the most significant source <br />of air pollution from the dust generated from construction. The amount of dust generated during <br />construction would be highly variable and is dependent on the amount of material being demolished, the <br />type of material, moisture content, and meteorological conditions. If uncontrolled, PM10 and PM2.5 levels <br />downwind of actively disturbed areas could possibly exceed State standards. Consequently, construction - <br />related criteria pollutant emissions are potentially significant. <br />Impact AIR -2: During construction of the Project, construction activities would generate fugitive dust <br />during ground -disturbing activities that exceeds the BAAQMD significance thresholds. <br />"To be conservative, air quality modeling was completed using an earlier start date of January 1, 2016, which reflects <br />higher emission rates from off-road equipment and on -road vehicles. Vehicle and equipment turnover, as well as changes in <br />emissions regulations, result in lower emission rates in later years. <br />4.2-24 DECEMBER 2014 <br />