ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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Total 1.86 10.15 0.62 Phase 2,Year 1 (2018-2019) WQCF 0.16 1.03 0.32 Phase 2,Year 2(2019-2020) WQCF 0.27 0.69 0.03 SJVAPCD Significance Threshold 10 10 -1 'SJVAPCD has not identified a mass emissions threshold for construction-related PM10 exhaust emissions and are shown here for information only.Fugitive PM10 dust emissions are discussed separately below.Refer to Appendix B for detailed assumptions and modeling output files. Source:Data modeled by EDAW 2006. Based on the modeling conducted, construction-related activities associated with year 1 of Phase 1 could result in project-generated emissions of approximately 2.35 tpy of ROG and 14.60 tpy of NOx, and for year 2, 1.86 tpy of ROG and 10.15 tpy of NOx(Refer to Table 4.3-5). With respect to Phase 2,year 1 could result in project- generated emissions of approximately 0.16 tpy of ROG and 1.03 tpy of NOx, and for year 2, 0.27 tpy of ROG and 0.69 tpy of NOx(Refer to Table 4.3-5). Modeled short-term project-generated emissions from construction equipment for both years of Phase 1 would exceed SJVAPCD's significance threshold of 10 tpy. Project- generated emissions of NOx could contribute substantially to an existing or projected air quality violation, expose sensitive receptors to substantial pollutant concentrations, especially considering the nonattainment status of San Joaquin County,and/or conflict with air quality planning efforts.As a result,this impact would be significant. Although the above analysis represents an intensive construction schedule for the proposed project,no calculations were made for installation of the recycled water distribution system. The design and schedule for this system has not been defined at this point.If the initial elements of the recycled water distribution system were planned for installation during the June 2008–May 2010 Phase 1 period,then there would be additional NOx emissions. Fugitive PM10 Dust Emissions SJVAPCD does not require a quantitative analysis of construction-related fugitive PMIo dust emissions and relies on a project's compliance with Regulation VIII(Fugitive Dust Prohibition). Though the proposed project would be required by law to comply with Regulation VIII(Fugitive Dust Prohibition),project applicable SJVAPCD-required control measures are not currently part of the project description. In addition,no other SJVAPCD-recommended control measures beyond compliance with Regulation VIII are included.Project-generated fugitive PMIo dust emissions could violate or contribute substantially to an existing or projected air quality violation,expose sensitive receptors to substantial pollutant concentrations,especially considering the nonatt:ainment status of San Joaquin County,and/or conflict with air quality planning efforts.As a result,this impact would be significant. IMPACT Air Quality—Generation of Long-Term Operation-Related(Regional) Emissions of Criteria Air 4.3-2 Pollutants and Precursors. Operation-related activities would not result in project-generated emissions of ROG or NOx that exceed SJVAPCD's significance threshold of 10 tpy. Thus,project-generated, operation- related emissions of criteria air pollutants and precursors would not violate or contribute substantially to an existing or projected air quality violation, expose sensitive receptors to substantial pollutant concentrations, or conflict with air quality planning efforts.As a result, this impact would be a less-than-significant. Operation-related activities would result in long-term regional emissions of criteria air pollutants (e.g.,PMIo)and precursors(e.g.,ROG and NOx) from stationary-, area-, and mobile-source emissions, as discussed separately below. Manteca WQCF and Collection System Master Plans EIR EDAW City of Manteca 4.3-21 Air Quality