25D - 55 AND ALTON AVE OVERCROSSING

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NEPAICEQA Re-Validation. It is assumed that the results of the reconnaissance level analyses will be negative and that no additional biological work (including any focused surveys) will be required. Task 3.2.2 Cultural Resources The Huitt-Zollars Team will conduct a records search at the Information Center of the California Historical Resources Information System to determine if any new cultural sites have been identified since the Historic Property Survey Report (HPSR) was prepared for the proposed project. In addition, a field reconnaissance of the structures located along the project route will be conducted to confirm that no resources are present that were not eligible at the time that the HPSR was prepared. It is assumed that the findings of the above evaluations will be negative and that the results will be documented in a technical memorandum to be included as an attachment to the NEPAICEQA Re-Validation. Task 3.2.3 Noise Afield reconnaissance of the project alignment will be conducted to confirm whether any new noise sensitive receptors have been constructed since the noise analyses for the project were originally prepared. In addition, it will be documented whether the previously identified receptors (i.e., Carriage Stop Motel, Adagio Apartment Complex, and residence at 110 Alton Avenue) are still present. It is assumed that no new sensitive noise receptors will be identified. Because the traffic study is assumed to require an update, it is assumed that the noise modeling will be updated to address any changes in predicted noise levels at these three receptors. New short term noise measurements will be conducted at these three receptors. In addition, one long-term noise measurement will be conducted if a secure location can be identified. A focused noise model for these receptors will be developed based on the traffic noise model that was used for the EIRIEA to be provided by the City. A noise technical memorandum will be prepared as an attachment to the NEPAICEQA Re-Validation form that focuses on these three receptors. A full noise study report is not assumed or included in this scope. It is assumed that at a minimum a wall will be found to be acoustically feasible at 110 Alton Avenue, as in the current EIRIEA, and that a Noise Abatement Decision Report (NADR) will be required. Huitt-Zollars will prepare a NADR based on the current NADR annotated outline that will address the reasonableness of any walls that are found to be acoustically feasible. Task 3.2.4 Air Quality New requirements related to mobile source air toxics (MSATs), greenhouse gas emissions, and particulate matter (PM10 and PM2.5) have been issued since the air quality analysis was prepared for the proposed project. An air quality technical memorandum will be prepared as an attachment to the NEPA/CEQA Re-Validation form that addresses the following items. The project area has been classified as an attainment /maintenance area for carbon monoxide (CO). Since a detailed CO analysis was prepared and included in the existing EIR/EA and since the project area is not in attainment I maintenance, it is assumed that no additional CO analyses will be required. • Regional Transportation Plan (RTPJ and Regional Transportation Improvement Program (RTIP). Document the current status of the project with regard to its inclusion in the 2008 RTP and RTIP and confirm that the scope of the project matches the RTIP description. It is assumed that the project is included and described accurately in the 2008 RTIP. Localized PMzs/PM,o Hot Spot Analysis. Analyze the degree to which project-related traffic volumes have a potential to affect local PMz.s and PM,o concentrations, based on the United States Environmental Protection Agency (EPA) guidance document entitled Transportation Conformity Guidance for Qualitative Hot-spot Analyses in PMzS and PM,o Nonattainment and Maintenance Areas. This scope and cost assumes that a screening level analysis is appropriate, and that no modeling will be required by Caltrans or FHWA to address PMz.S and PM,o. • Mobile Source Air Toxics. Evaluate proposed project-related mobile source air toxics (MSATs) emissions in accordance with FHWA interim guidance on how MSATs should be addressed in NEPA documents. It is not assumed that extensive qualitative analyses would be required to address MSATs. If an extensive quantitative analysis is required for the project, then a scope and cost estimate would be provided for this additional effort. 25D-53