Environmental Impact Statement - Sonoma Land Trust

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California Department of Fish and Game U.S. Fish and Wildlife Service Section 3.11. Air Quality The carbon sequestration change related to converting agricultural and fallow fields to tidal wetlands was estimated based on a range of literature values. Thresholds of Significance Pollutants other than GHG emissions Criteria used for determining the significance of an air quality impact are based on the State CEQA Guidelines and professional standards and practices. Impacts were considered significant if an alternative would: • Conflict with or obstruct implementation of the applicable air quality plan; • Violate any air quality standard or contribute substantially to an existing or projected air quality violation; • Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is in non-attainment under an applicable federal or State ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors); • Expose sensitive receptors to substantial pollutant concentrations; or • Create objectionable odors affecting a substantial number of people. The State CEQA Guidelines further state that the significance criteria established by the applicable air quality management or air pollution control district may be relied on to make the determinations above. The BAAQMD has specified significance thresholds within its BAAQMD CEQA Guidelines: Assessing the Air Quality Impacts of Projects and Plans (Bay Area Air Quality Management District 1999) to determine air quality impacts for projects located within the SFBAAB. The Project would therefore result in a significant impact on the environment if it would: • contribute to CO concentrations exceeding the State Ambient Air Quality Standard of 9 ppm averaged over 8 hours and 20 ppm for 1 hour; • Expose the public to toxic air contaminants that would increase the probability of contracting cancer for the Maximally Exposed Individual (MEI) in excess of 10 in one million; or • generate criteria air pollutant emissions in excess of the BAAQMD annual or daily thresholds (see Table 3.11-4 below). Sears Point Wetland and Watershed Restoration Project Final Environmental Impact Report/Environmental Impact Statement 3.11-15 April 2012
California Department of Fish and Game U.S. Fish and Wildlife Service Section 3.11. Air Quality Table 3.11-4. Thresholds of Significance for Project Operations Pollutant Ton/yr Lb/day ROG 15 80 NOx 15 80 PM10 15 80 The 1999 BAAQMD CEQA guidelines do not provide significance thresholds for construction-related air pollutant emissions and do not require quantitative estimates of construction emissions. Instead, they require implementation of control measures to reduce PM10 emissions (Bay Area Air Quality Management District 1999). PM10 emitted during construction activities varies greatly depending on the level of activity, the specific operations taking place, the equipment being operated, local soils, and weather conditions. Nonetheless, experience has shown that there are a number of feasible control measures that can be reasonably implemented to reduce PM10 emissions during construction; these measures are summarized as Environmental Measures/Best Management Practices in Section A of the 1999 BAAQMD Guidelines. . The control measures are grouped into three categories: Basic Control Measures to be implemented by all projects, Enhanced Control Measures that should be implemented at construction sites greater than 4 acres in area, and Optional Control Measures that are encouraged for large construction sites or sensitive receptors. According to BAAQMD, if the appropriate control measures are implemented, air pollutant emissions from construction activities are considered less than significant (Bay Area Air Quality Management District 1999). GHG Emissions Under CEQA, an environmental impact report must identify and focus on the significant environmental effects of a proposed project. Significant effect on the environment means a substantial, or potentially substantial, adverse change in the environment (PRC Section 21068). CEQA further states that the CEQA guidelines shall specify certain criteria that require a finding that a project may have a significant effect on the environment. As of the writing of this EIS/EIR, the state agencies with jurisdiction over air quality regulation and GHG emissions such as CARB and the BAAQMD had not established regulations, methodologies, significance thresholds, standards, or analysis protocols for the assessment of GHG emissions and climate change. However, the Office of Planning and Research has released guidance for the analysis of GHG emissions that emphasizes quantification of GHG emissions, determination of significance, and adoption of mitigation measures if the GHG emissions are determined to be significant by the lead agency. Sears Point Wetland and Watershed Restoration Project Final Environmental Impact Report/Environmental Impact Statement 3.11-16 April 2012
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Sears Point Wetland and Watershed R
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Sears Point Wetland and Watershed R
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Contents List of Tables ...........
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California Department of Fish and G
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Executive Summary This summary prov
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Table ES-1. Summary of Impacts and
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Table ES-1. Continued Page 3 of 141
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Table 1-1. List of Local, State, an
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Table 2-2. Action Alternatives Cons
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Chapter 3 Affected Environment and
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Section 3.1 Geology, Soils, and Pal
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Section 3.2 Surface-Water Hydrology
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Section 3.3 Water Quality Introduct
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Table 3.5-2. Special-Status Species
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Section 3.7 Agricultural Resources
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Chapter 4 Consultation and Other Re
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Sonoma Land Trust Chapter 4. Consul
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Chapter 5 Public Involvement and Sc
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Sonoma Land Trust Chapter 7. Refere
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Environmental Impact Statement - Sonoma Land Trust

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