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Section 4.0 – Environmental Setting and Discussion of Impacts <br /> <br /> <br />City of Redwood City 26 Initial Study/Mitigated Negative Declaration <br />Sandpiper Elementary School Facilities Expansion November 2016 <br />Objectionable Odors <br /> <br />Odor impacts can result from siting a new odor source (e.g., landfills, asphalt batch plants, food <br />processors, etc.) near existing sensitive receptors. The proposed project does not include new uses <br />that would emit odors. (Less Than Significant Impact) <br /> <br />4.3.3.4 Short-Term Construction Air Quality Impacts from the Proposed Project (Checklist <br />Questions 2-5) <br /> <br />Construction activities would generate dust and equipment exhaust on a temporary basis. Project <br />construction is estimated to take approximately five months to complete. <br /> <br />Criteria Pollutants <br /> <br />The BAAQMD CEQA Air Quality Guidelines identify the size of land use projects that could result <br />in significant air pollutant emissions. The BAAQMD screening level for criteria air pollutant <br />emissions during construction of an elementary school is 277,000 sf or 3,904 students. The proposed <br />project includes construction of a two-story modular classroom building, a Kindergarten modular <br />classroom, a public restroom, and other various additions and improvements to the project site. The <br />proposed improvements total approximately 17,200 sf of building space and would increase student <br />capacity at the school by 220 students. The project is below the BAAQMD screening levels for <br />construction criteria air pollutants and, therefore, would not result in a significant temporary <br />construction criteria air emissions impact. (Less Than Significant Impact) <br /> <br />Toxic Air Contaminants <br /> <br />Most of the construction activities would occur during the elementary school spring and summer <br />breaks, when school is not in session. The nearest sensitive receptors to the project site are the <br />residences located immediately north and south of the project site (refer to Figure 2.2-3). Health <br />risks from TACs are a function of both concentration and duration of exposure. Construction of the <br />proposed project would take approximately five months to complete, beginning in February 2017 and <br />ending in July 2017. The new classroom buildings would be modular and, therefore, major <br />components would be constructed off-site prior to being moved on-site. Grading for the modular <br />buildings and associated improvements would occur intermittently to construct building pads and set <br />foundations. The use of heavy diesel equipment on the site would be minimal given the construction <br />method and relatively short construction schedule. Because construction activities would be <br />minimal, truck traffic to and from the site would also be intermittent and of brief duration. <br /> <br />As described below in MM AIR-1, the project would incorporate BAAQMD-recommended best <br />available control measures to reduce fugitive dust during construction. This measure would also help <br />to reduce construction TACs. Sensitive receptors in the project area, including nearby residents and <br />children on the project site, would not be exposed to substantial levels of TACs during project <br />construction activities. (Less Than Significant Impact with Mitigation Incorporated) <br /> <br /> <br />7.A. - Page 57