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SAN LEANDRO SHORELINE DEVELOPMENT EIR ADDENDUM PROJECT CITY OF SAN LEANDRO Modified Project would not result in a new impact or a substantial increase in magnitude of existing impacts with respect to construction -related criteria air pollutant emissions. Long -Term Operational Impacts The Original Project would result in a new office building, conference center, library, golf course, hotel, and restaurants and would generate air pollutant emissions from area sources, energy use, and mobile sources. It would also result in new residential uses, including apartments, townhomes, and single-family homes as well as open space parks, parking lots, and parking structures. The Certified EIR determined that the impacts from the implementation of the Original Project would be less than significant, as the Original Project would not exceed the BAAQMD thresholds for operations. The Modified Project would also result in a new library, golf course, hotel, restaurants, apartments, townhomes, and single-family housing but would not include the office building, conference center, or parking structure. In addition, the Modified Project would have more building area than the Original Project. The increase in building square footage could result in generating slightly higher area source emissions (e.g., emissions from paints, household cleaning supplies, landscaping, etc...). However, non- residential land uses generally have higher energy demands than residential uses. Thus, the decrease in non-residential land uses and increase in residential units under the Modified Project is anticipated to result in slight less or similar energy sector emissions. Furthermore, as seen in Appendix D, San Leandro Shoreline Trip Generation Memorandum, the Modified Project would result in 8,375 daily trips and 532 PM peak hour trips, fewer trips than the Original Project's 8,913 daily trips and 1,070 PM peak hour trips. Overall, as mobile source emissions would generate the majority of criteria air pollutants, the decrease in trips would result in a decrease in operation -related emissions. Therefore, this increase in building area would not result in a substantial increase in emissions. The Modified Project would not exceed the regional operation -phase significance thresholds. Therefore, operation of the Modified Project would not result in a new significant impact or a substantial increase in magnitude of existing air quality impacts which would result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non -attainment under an applicable federal or state ambient air quality standard. AIR -c. Construction Off -Site Community Risk and Hazards The Modified Project would result in an additional 208,000 cubic yards of imported fill resulting in an increase in construction truck trips [and elevated concentrations of TACs (i.e., diesel particulate matter {DPM}) and PM2.5 near sensitive residential land uses. Consequently, a full health risk assessment (HRA) of TACs and PM2.5 was completed and is included in Appendix B to the Addendum. Health risks to off-site residents from construction emissions associated with the Original Project were found to be less than significant with mitigation. Diesel particulate matter generated by the Modified Project during construction could potentially result in significant localized air quality impacts without implementation of Mitigation Measure AIR -5 which addresses reducing DPM emissions. Mitigation Measure AIR -5: The construction contractor shall use equipment that meets the United States Environmental Protection Agency (EPA) -Certified Tier 3 emissions standards for off-road diesel - Page 30 PlaceWorks