Reso 2020-119 1388 Bancroft Apartments MND MMRP

Home

3.0 ENVIRONMENTAL CHECKLIST Potentially Significant Impact Less Than Significant Impact with Mitigation Incorporated Less Than Significant Impact No Impact 3. AIR QUALITY. Would the project: a) Conflict with or obstruct implementation of the ❑ ❑ ® ❑ applicable air quality plan? b) Violate any air quality standard or contribute substantially to an existing or projected air quality ❑ ® ❑ ❑ violation? c) Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is nonattainment under an applicable ❑ ❑ ® ❑ federal or state ambient air quality standard (including releasing emissions, which exceed quantitative thresholds for ozone precursors)? d) Expose sensitive receptors to substantial pollutant ❑ ® ❑ ❑ concentrations? e) Create objectionable odors affecting a substantial ❑ ❑ ® ❑ number of people? ENVIRONMENTAL SETTING REGIONAL SETTING Air quality in a region is determined by its topography, meteorology, and existing air pollutant sources. These factors are discussed below, along with the current regulatory structure that applies to the San Francisco Bay Area Air Basin (SFBAAB), which encompasses the project site, pursuant to the regulatory authority of the Bay Area Air Quality Management District (BAAQMD). San Francisco Bay Area Air Basin The SFBAAB comprises all of Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, and Santa Clara counties, the southern portion of Sonoma County, and the southwestern portion of Solano County. There are 1 1 climatological subregions within the SFBAAB. The project site is in the Northern Alameda and Western Contra Costa Counties climatological subregion of the air basin. The subregion's western boundary is defined by San Francisco Bay and its eastern boundary by the Oakland -Berkeley Hills. The Oakland -Berkeley Hills have a ridgeline height of approximately 1,500 feet, a significant barrier to air flow. The most densely populated area of the subregion lies in a strip of land between the bay and the lower hills. In this area, marine air traveling through the Golden Gate, as well as across San Francisco and through the San Bruno Gap, is a dominant weather factor. The Oakland -Berkeley Hills cause the westerly flow of air to split off to the north and south of Oakland, which results in diminished wind speeds. The prevailing winds for most of this subregion are from the west. At the northern end, near Richmond, prevailing winds are from the south-southwest. Temperatures in this subregion have a narrow range due to the proximity of the moderating marine air. Maximum temperatures during City of San Leandro 1388 Bancroft Avenue Project November 2018 Initial Study/Mitigated Negative Declaration 3.0-7