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phase, and provided to the CITY and PDT for review, comment, and ultimate concurrence. CONSULTANT assumes that following early PDT agreement on alternatives, the following proposed environmental technical studies will be performed on up to two build alternatives. CONSULTANT will also develop summary information for the Environmental Document for mandatory alternatives such the No Build Alternative and Transportation Systems Management, and compare them against their ability to meet the purpose and need. CONSULTANT will complete this task using existing available and relevant information, and coordination with the traffic analysis. Task 5.2-Air Quality and Conformity As the proposed project is expected to receive federal funding, it will require an FHWA air quality conformity determination before the Final Environmental Document can be approved. Caltrans District 4 requires the following submittals to support the request for a project-level conformity determination from FHWA. Subtask 5.2.1—Air Quality Impact Assessment CONSULTANT will prepare an Air Quality Impact Assessment to address criteria pollutants and the project's conformity with the assumptions in the 2009/2013 Regional Transportation Plans (RTPs) and 2011/2013 Transportation Improvement Programs (TIPs). The Air Quality Impact Assessment will describe regional meteorology and climate, relevant regulations, existing air quality attainment status and local trends, and potential project-related air quality impacts. The report will include quantitative analyses of daily and annual carbon monoxide (CO) levels, construction-related emissions (including comparison with Bay Area Air Quality Management District CEQA thresholds for construction emissions), and greenhouse gas emissions (both from project construction and operation) for existing conditions and for the project opening year and horizon year for the No Build and two Build alternatives. Air quality modeling will be performed using CALINE4 for CO, the Sacramento Metropolitan Air Quality Management District's Roadway Construction Emissions Model� for construction emissions, and EMFAC2011 for carbon dioxide/greenhouse gases. Subtask 5.2.2—Particulate Matter Conformity Determination In order for the project to obtain an FHWA conformity determination, a separate conformity determination for fine particulate matter (PM2.5) is needed before the Draft Environmental Document is issued for public review. The conformity process consists of completing a PM2.5 Assessment Form and related deliverables, engaging in interagency consultation with the Bay Area Air Quality Conformity Task Force (chaired by the Metropolitan Transportation Commission [MTC]), and engaging in public participation as part of the Draft Environmental Document public review. Potential PM2.5 effects from transportation projects are strongly correlated with truck volumes and percentages compared to overall traffic volumes on the same roadways. The US 101/Woodside Road interchange has high total vehicle volumes but relatively low truck ' Caltrans District 4 currently advises the use ofthis model for construction emissions evaluations in the Bay Area. ATTY/AGR/2013.164/URS PROFESSIONAL SERVICES AGR REV:10-15-13 VR Page 37 of 78