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Jones & Stokes will send out letters requesting information on historic properties to local governments, historical societies, and historic preservation organizations. The evaluation of properties within the APE will be reported in the Historical Resource Evaluation Report (HRER), which will include a historic context statement. In addition, ICF Jones & Stokes will review the Caltrans historic bridge inventory, and identify previously evaluated state and local bridges within the APE. As part of the Centerline project an evaluation of several portions of what is anticipated would comprise the APE were evaluated. The depot that is located at the east end of the project alignment was constructed in 1986 and would not require evaluation (the original depot was demolished when the new depot was constructed). The Juvenile Detention Home (located at 1207 Fruit Street) was also evaluated as part of the Centerline project and it was concluded that the property does not appear to meet the criteria for listing on the National Register of Historic Places (NRHP) or the California Register of Historical Resources (CRHR), and has not been designated as historic by the City of Santa Ana. No other resources were identified that required evaluation within what would be the anticipated APE for the proposed project. It was noted that the area along Santiago Street to the south of Santa Ana Boulevard has a high potential for buried archaeological resources, however, no resources or sites were identified during the field work that was performed for the Centerline project along the portion of Santiago Street where it intersects Santa Ana Boulevard. Following completion and approval of the APE and detailed reports discussed above, a summary document (the HPSR) shall be generated in accordance with Caltrans/FHWA standards for Section 106 compliance with the NHPA. It is anticipated that the proposed project shall result in an HPSR with a finding that only properties previously determined not eligible for inclusion in the NRHP or that are determined to be not eligible for inclusion in the NRHP are present within the Project APE. No further cultural work, including Phase Il analyses/investigations and/or a Finding of Effect, are assumed or included in this scope of work. Visual Impact Assessment In accordance with FHWA and the U.S. Department of the Interior guidelines, the visual analysis will be prepared under the direction of a licensed Landscape Architect and based on FHWA's Visual Impact Assessment for Highway Projects. The existing visual environment and viewshed will be analyzed using available mapping, aerial photos, GIS, and site reconnaissance. Project plans and profiles will be analyzed to identify proposed physical changes to the study area and to aid in the identification of key observer viewpoints. Key viewpoints (visual quality "sensitive receptors") will be identified for the proposed project. Visual quality of proposed conditions will be evaluated OF and FROM the key viewpoints. That is, visual quality will be evaluated "OF" the proposed improvements and "FROM" the improved facility toward the viewpoint. It is assumed that up to three key viewpoints will be identified and assessed. These viewpoints will be submitted to Caltrans for approval prior to starting the analysis. FHWA methodology, including the evaluation of unity, intactness, and vividness, will be applied. Mitigation measures, such as finish treatment of structures and sound barriers and plantings, will be recommended, if necessary. Noise mitigation, including walls and/or berms will be included in the analysis if identified in the noise report. It is assumed that up to two visual simulations will be included. Noise Study Report ICF Jones & Stokes will prepare a noise study report evaluating the noise impacts and potential noise abatement/mitigation measures, if any, associated with the proposed project. Because federal and Caltrans oversight is involved, the report will be prepared in accordance with procedures specified by FHWA in Title 23, Section 772 of the Code of Federal Regulations (CFR) (23 CFR 772) and the Caltrans Traffic Noise Analysis Protocol (Protocol). ICF Jones & Stokes will conduct a site visit to identify noise sensitive land uses and other features of the project area relevant to the noise study. Noise sensitive receptors have been identified, including those homes located to the east of the rail line along the north side of Santa Ana Boulevard. ICF Jones & Stokes will consult with the Caltrans District 12 noise specialist assigned to this project to ensure that all requirements are addressed. A field noise study will be performed to quantify and assess existing noise conditions at the potential noise -sensitive areas. It is estimated that short-term (10 to 15 minutes duration) sound -level data will be collected at up to four (4) representative noise -sensitive locations throughout the area. In addition continuous 24-hour noise monitoring will City of Santa Ana