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AECOM
<br />City of Santa Ana Climate Action Plan EIR
<br />If the CAP recommends construction of any physical facilities,
<br />which is considered unlikely, the air quality impact analysis
<br />will include a general discussion of temporary and short-term
<br />air pollutant emissions associated with construction projects
<br />identified in the CAP. Short-term increases in criteria air
<br />pollutant (i.e., respirable and fine particulate matter [PMlo
<br />and PM2.5, respectively)] and ozone precursor emissions
<br />(reactive organic gases [ROG] and oxides of nitrogen [NOJ)
<br />will be modeled. The modeling will take into account the size
<br />of the proposed facilities and infrastructure, construction
<br />phasing schedule, and other project-specific construction
<br />data (e.g., the amount of land to undergo ground disturbance
<br />or grading) to be provided by the City. Default settings of the
<br />URBEMIS model or SCAQMD-recommended adjustments will
<br />be used for construction parameters that are not known at
<br />the time of the analysis.
<br />Operational Emissions. AECOM will also include an analysis
<br />of long-term operation criteria air pollutant and precursor
<br />emissions for CAP implementation from area sources (e.g.,
<br />equipment fuel combustion and natural gas usage) and
<br />mobile sources, using SCAQMD-recommended
<br />methodologies (URBEMIS, CalEEMOD, EMFAC, OFFROAD,
<br />and/or AP-42). Mobile emissions will be modeled using
<br />URBEMIS with default trip rates, or EMFAC, if project-specific
<br />trip generation information is provided.
<br />The EIR will include an analysis of long-term local mobile-
<br />source carbon monoxide (CO) impacts using SCAQMD-
<br />recommended screening techniques, such as The
<br />Transportation Project-Level Carbon Monoxide Protocol (CO
<br />Protocol).
<br />Stationary source emissions of criteria pollutants, precursors,
<br />and TACs will be discussed qualitatively in relation to
<br />SCAQMD permitting requirements. Compliance with
<br />SCAQMD rules and regulations, as required by law, will be
<br />included in the discussion and analysis of impacts.
<br />Sources of odor, both existing and possible near
<br />infrastructure improvement sites, will be identified along
<br />with a qualitative discussion of their resultant impacts on
<br />existing receptors.
<br />Cumulative air quality impacts, including consistency with
<br />SCAQMD's AQMP, will be addressed qualitatively.
<br />Temporary and short- and long-term project-generated
<br />increases in criteria air pollutant and precursor emissions,
<br />and exposure to TACs and odors will be compared with
<br />impacts found to be significant or potentially significant. The
<br />effectiveness of proposed mitigation measures will also be
<br />evaluated either quantitatively or qualitatively.
<br />Greenhouse Gas Emissions
<br />AECOM will conduct an analysis of impacts of the proposed
<br />project on GHG emissions as required by CEQA. The
<br />evaluation will provide a brief discussion of existing
<br />conditions and environmental setting in a global, federal,
<br />state, regional, and local context, including the state of the
<br />science and state, regional, and local GHG inventories. A
<br />summary of federal, state, and local climate change-related
<br />regulations, policies, and programs will be provided. The
<br />City's CAP will be described and relevant General Plan policies
<br />will be identified. SCAQMD is preparing GHG Significance
<br />Thresholds. With the City, AECOM will consult with SCAQMD
<br />regarding the CAP and the appropriate methodologies for
<br />assessing impacts. In the absence of guidance from SCAQMD,
<br />a GHG threshold of significance will be developed based on
<br />AECOM's extensive experience evaluating GHG impacts.
<br />GHG emissions methodology and impacts of the proposed
<br />project will be discussed; project-related GHG emissions will
<br />be evaluated quantitatively for determination of significance.
<br />The determination of significance will be based on whether
<br />the level of GHG emissions generated under the CAP
<br />constitute a substantial contribution to the significant
<br />adverse cumulative impacts of global climate change. If the
<br />construction of projects under the CAP or operational GHG
<br />emissions under the CAP violate the applicable thresholds of
<br />significance, mitigation measures (quantitative and best
<br />management practices) that clearly identify timing,
<br />responsibility, and performance standards to avoid or fully
<br />reduce adverse and potentially adverse effects will be
<br />developed and applied, where necessary, using the CAPCOA
<br />document: Quantifying Greenhouse Gas Mitigation
<br />Measures: A Resource for Local Government to Assess
<br />Emission Reductions from Greenhouse Gas Mitigation
<br />Measures.
<br />All aspects of the proposed project will be quantified in units
<br />of metric tons of carbon dioxide equivalent (C02e).
<br />Construction Emissions. If the CAP recommends construction
<br />of any physical facilities, which is considered unlikely, AECOM
<br />will model total construction-related GHG emissions
<br />associated with buildout of the City's General Plan and
<br />implementation of the CAP using the latest versions of one or
<br />more of the following models at the time of the analysis:
<br />URBEMIS, CalEEMOD, EMFAC, and/or OFFROAD.
<br />SCAQMD's thresholds of significance. Mitigation measures
<br />that clearly identify timing, responsibility, and performance Operational Emissions. For the proposed project's
<br />standards will be prepared to avoid or fully reduce any25C=lrational emissions, both the baseline (i.e., existing
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