Environmental Declaration WPCP 20240409

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3. Environmental Checklist complies with the goals of the 2017 Clean Air Plan. Specifically, the Proposed Project would promote Natural and Working Lands Control Measure NW3 Carbon Sequestration in Wetlands. Accordingly, the Proposed Project would result in beneficial impacts associated with implementation of provisions of a local air quality plan, qualifying as No Impact in relation to the identification of significant impacts under CEQA. Impact Designation: No Impact b) Increase of any criteria pollutant for which the Project region is not attaining: Implementation of the Proposed Project would result in conversion of the existing 6.9-acre wastewater storage basin into a treatment wetland facility. Construction would occur over five phases, with two concurrent phases (refer to Section 2.4). Operation of the Proposed Project would require some maintenance activities but would not require additional employees. According to the BAAQMD's 2022 Air Quality Guidelines, for a project that requires simultaneous occurrence of two or more construction phases, a detailed assessment must be performed. Therefore, the Proposed Project -related emissions were calculated using the California Emissions Estimator Model (CaIEEMod) version 2022.1.16 In accordance with guidance provided in Appendix D of the 2022 Air Quality Guidelines, irrigated areas are assessed as City Park Land Use Type within CaIEEMod. The Proposed Project consists of a project similar to an irrigated lands project and was identified as a City Park. Defaults within CaIEEMod were adjusted to account for the Project specific details related to construction and operation of the Proposed Project versus a typical City Park. Construction and operation emissions would not overlap; therefore, construction and operation emissions are analyzed separately. It was assumed that construction would last approximately three months starting July 1st, 2024. All CaIEEMod data tables, including input values, assumptions used, and output values, are detailed in Appendix A. Construction lmgacts To estimate criteria emissions from construction equipment, anticipated construction equipment and anticipated personnel vehicle trips for each of the five construction phases were input over defaults using information provided by Project engineers. Based on the schedule and construction progression, Phases 1 and 2 were assumed to overlap. Approximately 11,000 cubic yards of fill would be required during Phase I grading and no export of soil would be necessary to develop the Proposed Project. Demolition was selected as part of Phase I to account for the removal of existing concrete debris from existing soil stockpiles on site. According to engineering calculations, it was estimated approximately 6000 tons of debris would be removed from the site to provide clean fill from the on - site stockpile. The Proposed Project would result in the temporary generation of ROG, NOx, PM10, and other regulated pollutants during construction. ROG and NOx emissions are associated with personnel vehicle trips, delivery of materials, and construction equipment exhaust. PM10 is generated during site preparation, excavation, road paving, and from exhaust associated with construction equipment. Resulting emissions from the Proposed Project are presented in Table 3-4 and compared to the BAAQMD significance thresholds to assess CEQA impacts. As shown in Table 3-4, emissions from the is California Air Pollution Officers Association (CAPCOA) in collaboration with the California Air Districts. California Emissions Estimator Model (CaIEEMod) (Version 2022.1.1.21). Available at:: tllu5:ri ivww ssCL1 �. _ 1 nnti ad nE + .,i San Leandro Treatment Wetlana 11 IS/MND