25G - ENGINEERING SRVS GRADE SEPARATION

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AECII prepared will identify and document anticipated impact The air quality technical report will provide the following to paleontological resources existing with the project's discussions and analyses: limits of disturbance (both vertical and horizontal), if potential impacts exist. RegulatorySettingand Existing Conditions. Summarize the existing federal, state, and local air ICF Jones & Stokes shall prepare aPIR/PER that quality regulatory environment as it affects the includes the following: proposed project, and describe the location of sensitive • Summary of the proposed project receptors in the project vicinity. Using data provided by • Delineation of the project limits the California Air Resources Board (GARB) and the • Delineation of the project excavation locations and SCAQMD, characterize existing air quality conditions in depths the project area and explain how those conditions are • Document efforts to avoid or minimize effects on affected by local climate and topography. paleontological resources • Identify significance and/or sensitivity of Evaluation of Construction Emissions. Based on paleontological resources and/or rock units current District 12 procedure, provide a qualitative following the guidance provided at: discussion related to construction emissions. http://www.dot.ca.gov/ser/volt /sec3/physical/Ch0 8Paleo/chap08paleo.htm#pir Evaluation ofOperations-Period Mass Emissions. • Identification of sources consulted and results of Evaluate whether the project meets transportation that consultation conformity requirements by determining whether it is Identification of any consultation related included, as currently defined, in the most recent constraints Regional Transportation Plan (RTP) and Regional Identification of a course of action, including Transportation Improvement Program (RTIP) prepared identification of specific geologic formations and by the Southern California Association of Governments paleontological resources (SCAG). It is assumed that the projects will be included in the RTIP and that a regional analysis will not be • Identification ofthe persons preparingthe PIR/PER and their qualifications required. • Identify whether a Paleontological Mitigation Plan Localized Carbon Monoxide HotSpotAnalysis. (PMP) is recommended Analyze the degree to which project-related traffic volumes have a potential to effect local carbon It is assumed that a PMP will not be recommended or monoxide (CO) concentrations usingthe California required for the proposed project and one is not Department of Transportation CO Hotspot Protocol. It is included in this scope and cost. It is further assumed anticipated that the CO screening procedure will be that the findings of the PIR/PER will be negative and no appropriate. However, it is assumed, based on additional paleontological tasks or effort will be experience within the District that CALINE-4 dispersion required. modeling will also be performed. It is assumed that up to two intersections will be modeled. Based upon the last three road/rail grade separation Localized PM2.5/PM~OHotSpotAnalysis. Analyze projects that ICF Jones & Stokes has performed in the degree to which project-related traffic volumes have southern California an air quality report may not be a potential to affect local PM2.5 and PM10 required forthe project. It has been determined on concentrations, based on the United States these other three projects that as long as the project Environmental Protection Agency (EPA) guidance does not add additional capacity or include the document entitled Transportation Conformity Guidance installation of new stop signs or traffic signals that an for Qualitative Hot-spot Analyses in PM2.5 and PM10 Air Quality Report is not required. However, an Air Nonattainment and Maintenance Areas. This scope and Quality Report has been included in this scope and cost cost assumes that a screening level analysis is in case it is ultimately determined to be required by the appropriate, and that no modeling will be required by District. This will be discussed early in the process with Caltrans or FHWAto address PM2.5 and PM10. Caltrans and further document in the PES that is prepared. Mobile Source Air Toxics. Evaluate proposed project- related mobile source airtoxics (MSATs) emissions in ICF Jones & Stokes will prepare an air quality technical accordance with FHWA interim guidance on how MSATs report that analyzes air pollutant emissions associated should be addressed in NEPA documents. It is not with changes in vehicle speed and traffic distribution assumed that extensive qualitative analyses would be patterns resulting from the proposed project. All impact required to address MSATs. If an extensive quantitative analyses will be performed consistent with the analysis is required for the project, then a scope and technical requirements and methodologies outlined in cost estimate would be provided for this additional the Caltrans' Standard Environmental Reference (air effort, however, such an analysis is not anticipated. quality chapter). r~i f~, fr. ~~,.~~.o~, Ii:~ir~l~~s~l fir p:~r~Ue~~ t~~y Re~~~r~: ~;q~uiiv~~e~~: ire ~ I::' i it p:~l~ins fair w,~~~ ir~~ Il~~l~v~ir~ r~~ e ~~~r~~~'i~n I~° r~"e~~~ ~ ~ '