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pt 10M FSS 00 fug Bndge Structural Design Sewices The following technical studies will be prepared in support of the CE/MND document: Traffic Study - We will collect the necessary traffic data to describe the existing setting of the First Street/Santa Ana River crossing and its surroundings. An inventory will be conducted of the surrounding area of the overcrossing, to confirm existing geometries, channelization, traffic control, and pedestrian and bicycle facilities. The work plan is based on collecting new daily and a.m. and p.m. peak -hour traffic counts at the terminal intersections (i.e., 1st Street/Harbor Boulevard and 1 st Street/Fairview Street) and preparation of updated existing levels of service. Adaily volume -to -capacity ratio and peak hour link analysis will be prepared for the 1 st Street/SAR overcrossing segment. Operational analyses will be conducted consistent with both the City and Caltrans guidelines for individual design features of the project. Air Quality Study - The DMJM Harris team will prepare an Air Quality Assessment for the project in accordance with the Caltrans Transportation Project Level Carbon Monoxide (CO) Protocol, the EPA's fugitive dust conformity rule, and South Coast Air Quality Management District's (SCAQMD) CEQA Handbook of air quality guidelines. We will apply the CO screening analysis per Caltrans' guidelines. Noise Study - The DMJM Harris team will prepare a Noise Impact Analysis that assesses the project's potential effects on existing and future noise conditions. We will review applicable State (Caltrans), City, and County noise and land use compatibility criteria for the project area. Noise standards regulating noise impacts including Caltrans Noise Abatement Criteria (NAC) and standards included in the City noise ordinance will be discussed for land uses adjacent to the project. The areas with potential future noise impacts will be identified using land use information, aerial photographs, and field reconnaissance. A discussion of any existing sensitive uses in the project vicinity will be included. Existing roadway traffic noise will be calculated as abaseline condition, using traffic data included in the traffic study for the proposed project. Cultural Resources/Section 106 Compliance — We will provide a records research and in consultation generate an Area of Potential Effects (APE) map. Based on the APE, work tasks will include Native American consultation, archaeological survey, architectural survey, historical research, Historic Property Survey Report, Archaeological Survey Report, and the Historical Resources Evaluation Report. Natural Environment Study (Minimal Impact) - The Natural Environment Study (Minimal Impact) (NES [MI]) will be prepared for review by the City and Caltrans. A literature review and records search will be conducted to identify the existence or potential occurrence of sensitive or special interest biological resources (i.e., plant and animal species) within or in the vicinity of the project area. The fieldwork for this task will be conducted by qualified Our biologists in order to document the presence or absence of sensitive biological 04601 324.5557 DMJM HARRIS I AECOM resources (i.e., species or natural communities) or to determine the potential for occurrence of such resources that may not be detectable when the fieldwork is conducted. Section 4(F) Evaluation - We will prepare a Section 4(f) Evaluation. This evaluation will address potential direct and indirect impacts to public recreational facilities (e.g., Santa Ana River Bicycle and Equestrian Trails), wildlife and waterfowl refuges, and National Register listed and eligible historic sites (if any). Avoidance alternatives and measures to minimize harm will be included as part of the evaluation. We will identify Section 4 (f) resources as early as possible in the study process so that avoidance alternatives can be fully considered in the alternatives refinement task. It is likely that a Programmatic Section 4(f) Evaluation would apply to the proposed project. Initial Site Assessment (ISA) - We will prepare an ISA in accordance with Caltrans procedures and in general accordance with the American Society of Testing and Materials (ASTM) Designation E 1597-00, Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. Water QualityAssessment Report - We will prepare a Water Quality Assessment Report to address the project impacts on water quality. The report will discuss receiving waters conditions, objectives, and beneficial uses as well as Caltrans standard best management practices (BMPs) and project design features required in accordance with the Caltrans Statewide Storm Water Management Plan (SWMP). Task 4.3 Categorical Exclusion with Studies/Mitigated Negative Declaration (CE/MND): Based on the findings in the PES form and if Caltrans determines the project is not capacity enhancing as described in the HBRR regulations, the project would qualify for a CE with technical studies. However, we do not believe that a categorical exemption under CEQA would apply based on the nuisance factor of the construction impacts (noise, air quality, traffic inconvenience) and the long term changes due to the project (noise, traffic). Given the proximity of residents to the project site, there is a possibility for local controversy. Therefore, we recommends an MND for CEQA compliance to provide detailed information about the short and long term impacts and a vehicle for public participation/information. This scope of work assumes a CE processed with Caltrans Local Assistance and an MND processed through the City of Santa Ana. The MND would only meet the City's formatting standards and not be required to meet Caltrans formatting standards of the SER. CE Preparation - The DMJM Harris team will prepare a draft CE consistent with the processes outlined in the Caltrans Local Assistance Procedures Manual (LAPM). Once these documents are satisfactory to the City, we will package the document for the City to submit to Caltrans Local Assistance for their review. Their comments will be incorporated into the CE documents and resubmitted to IF