3_Exhibit C_ADDENDUM ONLY - Laserfiche WebLink

City of Pleasanton—Stoneridge Mall Residential Project Section 15183 Checklist/15164 Addendum CEQA Checklist FirstCarbon Solutions 65 Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480017/Consistency Checklist/21480017 Stoneridge Mall Residential Project Checklist Addendum_Updated.docx Potential localized and regional impacts would result in exceedances of State or federal standards for nitrogen oxide (NOX), particulate matter (PM10 and PM2.5), or CO. NOX emissions are of concern because of potential health impacts from exposure during both construction and operation and as a precursor in the formation of airborne ozone. PM10 and PM2.5 are of particular concern during construction because of the potential to emit exhaust emissions from the operation of off-road construction equipment and fugitive dust during ground-disturbing activities (construction fugitive dust). CO emissions are of particular concern during project operation because operational CO hotspots are related to increases in on-road vehicle congestion. ROG emissions are also important because of their participation in the formation of ground level ozone. Ozone is a respiratory irritant and an oxidant that increases susceptibility to respiratory infections and can cause substantial damage to vegetation and other materials. Elevated ozone concentrations result in reduced lung function, particularly during vigorous physical activity. This health problem is particularly acute in sensitive receptors such as the sick, elderly, and young children. The cumulative analysis focuses on whether a specific project would result in cumulatively considerable emissions. According to Section 15064(h)(4) of the CEQA Guidelines,2 the existence of significant cumulative impacts caused by other projects alone does not constitute substantial evidence that the proposed project’s incremental effects would be cumulatively considerable. Rather, the determination of cumulative air quality impacts for construction and operational emissions is based on whether the proposed project would result in regional emissions that exceed the BAAQMD regional thresholds of significance for construction and operations on a project level. The thresholds of significance represent the allowable amount of emissions each project can produce without generating a cumulatively considerable contribution to regional air quality impacts. Therefore, a proposed project that would not exceed the BAAQMD thresholds of significance on the project level also would not be considered to result in a cumulatively considerable contribution to these regional air quality impacts. Construction and operational emissions are discussed separately below. Construction Emissions Construction Fugitive Dust As previously mentioned, fugitive dust (PM10 and PM2.5) would be generated during earthmoving activities but would largely remain localized near the project site. The BAAQMD bases the determination of significance for fugitive dust on considering the control measures to be implemented. If all appropriate emissions control measures are implemented for a project as recommended by the BAAQMD, then fugitive dust emissions during construction are not considered significant. In addition, the BAAQMD recommends that all construction projects implement a series of mitigation measures which also include various dust control measures, such as watering disturbed areas daily and reducing vehicle speeds on unpaved roads. Adopted Prior EIR MM 4.B-1a requires the same construction mitigation measures recommended by the BAAQMD to ensure that adequate