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SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR <br />CITY OF SAN LEANDRO <br />AIR QUALITY <br />AIR -6 Operation of the Project would not expose sensitive receptors to <br />substantial concentrations of air pollution. <br />CO Hotspots <br />Areas of vehicle congestion have the potential to create pockets of CO called hotspots. These pockets <br />have the potential to exceed the State one-hour standard of 20 parts per million (ppm) or the eight-hour <br />standard of 9.0 ppm. Because CO is produced in the greatest quantities from vehicle combustion and does <br />not readily disperse into the atmosphere, adherence to ambient air quality standards is typically <br />demonstrated through an analysis of localized CO concentrations. Hotspots are typically produced at <br />intersections, where traffic congestion is highest because vehicles queue for longer periods and are <br />subject to reduced speeds. <br />The Project would generate 1,040 new external trips during the weekday morning peak hour, 1,060 new <br />external trips during the weekday evening peak hour, and 860 new external trips during the Saturday <br />midday hour.40 The Project would not conflict with Alameda CTC's CMP because it would not hinder the <br />capital improvements outlined in the CMP or alter regional travel patterns. Alameda CTC's CMP must be <br />consistent with MTC's/ABAG's Plan Bay Area, and an overarching goal of the regional plan is to <br />concentrate development in areas where there are existing services and infrastructure rather than <br />allocate new growth in outlying areas where substantial transportation investments would be necessary <br />to achieve the per capita passenger vehicle VMT and associated GHG emissions reductions. The Project <br />would be consistent with the overall goals of the MTC/ABAG's Plan Bay Area. Furthermore, the Project <br />would not increase traffic volumes at affected intersections to more than 44,000 vehicles per hour or to <br />more than 24,000 vehicles per hour where vertical and/or horizontal mixing is substantially limited. Trips <br />associated with the Project would not exceed the screening criteria of the BAAQMD. Localized air quality <br />impacts related to mobile -source emissions would therefore be less than significant. <br />Toxic Air Contaminants - Siting of Sensitive Receptors <br />On-site health risks and hazards imposed by existing sources (e.g., stationary sources and traffic on <br />adjacent streets and freeways) on the sensitive receptors of the Project (i.e., residents) were evaluated <br />pursuant to BAAQMD's methodology. BAAQMD has developed screening thresholds for assessing <br />potential health risks from stationary and mobile sources. Sources located within 1,000 feet of the Project <br />are included in BAAQMD's screening thresholds. To evaluate nearby sources, BAAQMD's database of <br />existing sources and freeway and surface streets screening tables for Alameda County were used. <br />Stationary sources near the Project site were identified using BAAQMD's Stationary Source Screening <br />Analysis Tool.4' Two stationary sources were identified (County of Alameda Public Works emergency <br />gasoline generator and San Leandro Marina gasoline dispensing). However, the gas dispensing operation is <br />located at the San Leandro Marina and will be removed as part of the Project. Therefore, there will be no <br />emissions from this source in the future and it does not require additional evaluation. <br />" Kittelson & Associates, 2014, Traffic Impact Analysis for the San Leandro Shoreline Development Project. <br />4' BAAQMD Stationary Source Screening Analysis Tool can be accessed from BAAQMD's website at <br />http://www.baagmd.gov/Divisions/Planning-and-Research/CEQA-GUIDELINES/Tools-and-Methodology.aspx <br />PLACEWORKS 4.2-31 <br />