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City of Pleasanton—Hidden Canyon Residences and Preserve Draft EIR Air Quality FirstCarbon Solutions 3.2-33 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480016/EIR/3 - Draft EIR/21480016 Sec03-02 Air Quality.docx The ARB Air Quality and Land Use Handbook (ARB Handbook) provides recommendations on the siting of new development within certain distances of sources of air pollution such as freeways.30 For example, the ARB Handbook recommends avoiding siting new sensitive land uses within 500 feet of a freeway. The ARB Handbook’s distance recommendations are based primarily on data showing that air pollution exposure can be reduced by as much as 80 percent with the recommended separation. More specifically, the ARB Handbook summarizes several studies analyzing the health impacts of exposure to nearby sources of air pollution, notably freeways and major roadways. The association of traffic-related emissions with adverse health effects was seen within 1,000 feet of the source of emissions and was strongest within 300 feet, which demonstrates that the adverse effects diminished with distance. Furthermore, the ARB Handbook (which was released in 2005) notes that the risk from DPM will decrease over time as cleaner technology phases in. Therefore, for purposes of this analysis, a 300-foot project radius (from the area where construction will occur) is appropriate for defining the area where the proposed project would have the potential to expose nearby receptors to substantial pollutant concentrations. There are no receptors (as defined by BAAQMD) within 300 feet of the proposed project’s construction area. There is a church located on-site within 315 feet of the closest point of construction (Lot 5 and the eastern portion of the connecting road where it will meet Dublin Canyon Road). The majority of the construction of the proposed project would occur at distances of 500 feet or more from the church. There are residences as close as approximately 315 feet from where the new connector road will enter and/or exit at Dublin Canyon Road. The remainder of the construction associated with the proposed project would occur at distances of 400 feet to more than 1,500 feet from existing residences. Therefore, due to the distance between the proposed project and existing receptors; the temporary and diffusive nature of construction activity; and the limited duration and intensity of construction (from 30 single-family homes and one road), the construction of the proposed project would not expose sensitive populations to substantial pollutant concentrations and impacts from construction would be less than significant. Operation The proposed project would develop 30 single-family homes and an internal connecting road and is not expected to generate substantive DPM or TAC emissions during operational activity. The proposed project would not have stationary sources or on-site sources of TACs during operation. Traffic generated by the proposed project would consist of mostly light-duty gasoline-powered vehicles, which, unlike diesel-fueled heavy-duty trucks, are not a significant source of DPM or TAC emissions. Thus, the proposed project would not result in significant health impacts to nearby sensitive receptors during operation. Accordingly, health impacts from operational activity associated with TACs would be less than significant. Level of Significance Before Mitigation Less than significant impact. 30 California Air Resources Board. 2005. Air Quality and Land Use Handbook: A Community Health Perspective. April.