AgdaPkt 2017-09-11 Closed and Joint SA PFA

Browse Search

TA. - Page 55 LSA ASSOCIATES, INC. ROCKETSHIP REDWOOD CITY ELEMENTARY SCHOOL PROJECT SEPTEMBER 2016 INITIAL STUDY/MITIGATED NEGATIVE DECLARATION The incremental daily emission increase in Table 2: Project Regional Emissions reactive organic gases(ROG)and nitrogen Emissions in Pounds Per Da oxides(NOX) (two precursors of ozone)and Reactive particulate matter(PM10 and PM2.5)associ- Organic Nitrogen ated with buildout of the proposed project are Project Gases Oxides Pm, PMzs identified in Table 2. The BAAQMD has Emissions 4.3 6.8 3.7 1.1 established thresholds of significance for BAAQMD ozone precursors and PM2.5 of 54 pounds per Standard 54.0 54.0 82.0 54.0 day,and a threshold of 82 pounds per day for Exceed? No No No No PM10.As shown in Table 2,emissions from Emissions in Tons Per Year Project 0.6 0.9 0.5 0.1 the project would not exceed these thresholds Emissions of significance;the impacts to air quality BAAQMD 10.0 10.0 15.0 10.0 from criteria air pollutant and precursor Standard emissions related to project operations would Exceed? No No No No be less than significant. The proposed project Note: Regional project emissions were calculated with an would not violate any air quality standard or assumed student enrollment of 600.The project has contribute substantially to an existing or since been revised to reduce the maximum enrollment capacity to 480 students.Therefore,the projected air quality violation. calculations overestimate project emissions associated with vehicle trips and the data presented The emission estimates above do not include above is a conservative estimate. potential soil vapor emissions,which are source: LSA Associates,Inc.,2014. existing and would not be exacerbated by this project. As described in Chapter I,Project Description,the project includes operation of a passive sub-slab depressurization system which is designed such that VOCs would be captured and discharged to ambient outdoor air. In the event that indoor air sampling and sub-slab monitoring indicates that the passive system is not effective (i.e.,indoor air concentrations of VOCs exceed acceptable levels),the system would be converted to an active system. The difference between the passive and active systems is that an active system would involve installation of exhaust fans to force the vapors out through the existing sub-slab depressurization system. This active air flow would expand the capture area of the sub-slab perforated pipes. The active system would involve the installation and continuous operation of 120 volt exhaust fans at each of four roof vent locations. The emissions associated with the soil vapor extraction may require a permit to operate by the BAAQMD. The project applicant will consult the BAAQMD Permit Handbook and Air District staff to determine disclosure requirements and applicable fees.Best Available Control Technology would be implemented as required for permitting under BAAQMD rules and regulations. c) 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 (including releasing emissions which exceed quantitative thresholds for ozone precursors)? (Less-Than-Significant Impact) CEQA defines a cumulative impact as two or more individual effects,which when considered together,are considerable or which compound or increase other environmental impacts. According to the BAAQMD,air pollution is largely a cumulative impact.No single project is sufficient in size,by itself,to result in non-attainment of ambient air quality standards. Instead,a project's individual emissions contribute to existing cumulatively significant adverse air quality impacts. Therefore,if daily average or annual emissions of operational-related criteria air pollutants exceed any applicable P:1RWC1401B Rocketship Sch-I\PRODUCrSUS-MND1Public\Ra ketship Public Review 09-29-16.docx(09/29/16)PUBLIC REVIEW DRAFT 31 ATTY/RESO.0084/CC RESO ADOPTING CEQA-ROCKETSHIP CHARTER SCHOOL APPEAL REV:09-05-17 VR Page 39 of 124