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SCOPE OF SERVICES Traffic analysis will be prepared to confirm intersection lane configurations and turn pockets are adequately sized to support future traffic with the project. Off -ramp queues will also be evaluated to confirm 1-5 mainline traffic would not be affected by potential spillback. It is assumed that no more than two rounds of comments will be received on the draft study from the City and Caltrans. 6.3.2 Phase I ESA A Project -wide Phase I Environmental Site Assessment (ESA) will be prepared for the project area. Additionally, we will review the Phase II work prepared by others in the prior phase and provide input on what applies to the Project. Note that this scope does not include parcel -specific ESAs for parcels to be acquired for the Project. The ESA will check for historical evidence of potential site contamination for the Project study area and will be performed in general accordance with ASTM E1527-21 and Caltrans Standards, and will consist of the following: • Conducting a review of available existing local, state, and federally maintained databases of hazardous materials sites and underground storage tank records generated by EDR, Inc. • Reviewing available historic aerial photographs and topographic maps to help identify prior land uses. • Performing a brief visual of the Project from the public right-of-way to document existing conditions. • Identifying sites of recognized environmental conditions (REC) that may have significant potential impact on the Project construction and/or environment. • Preparing a draft Phase I ESA report. • Responding to one set of review comments from the agency and providing a final report. The scope of services specifically excludes a Phase II investigation for hazardous materials, an evaluation for aerially deposited lead or other chemicals of concern, and asbestos or lead -based CITY OF SANTA ANA SANTA ANA BOULEVARD GRADE SEPARATION �r MARKTHOMAS paint surveys. These services, if needed, can be provided at an additional cost. 6.3.3 Air Quality The Project is located within Orange County region of the South Coast Air Basin (SCAB). The SCAB region where the project is located is within a nonattainment area for the federal 8-hour ozone (03), lead, and particulate matter less than 2.5 micrometers in diameter (PM2.5) standards and within an attainment/maintenance area for the federal carbon monoxide (CO) and particulate matter less than 10 micrometers in diameter (PM14) standards. Therefore, the Project is subject to Transportation Conformity. A Supplemental Air Quality Report will be prepared to address the change in the Project design (reduction in number of lanes, etc.), the updated traffic study that will be prepare, and the changes in air quality related requirements. The Air Quality report will consist of the following. Regulatory Setting and Existing Conditions. Summarize the existing federal, state, and local air quality regulatory environment as it affects the proposed project, and describe the location of sensitive receptors in the project vicinity. Using data provided by the California Air Resources Board (ARB) and the South Coast Air Quality Management District (SCAQMD), the report will characterize existing air quality conditions in the project area and explain how those conditions are affected by local climate and topography. Regional Conformity. Evaluate whether the project meets regional transportation conformity requirements by determining whether it is included, as currently defined, in the most recent Regional Transportation Plan/Sustainable Communities Strategy (RTPISCS) and Federal Transportation Improvement Program (FTIP) prepared by the Southern California Association of Governments (SCAG). Project -Level Conformity. Evaluate whether the project meets project -level transportation conformity requirements, which will also be used to support the CEQAINEPA analysis. • Localized Carbon Monoxide Hot Spot Analysis. Analyze the degree to which project -related traffic volumes have a