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Task 2 - Prepare Environmental Technical Studies Based on review of pertinent and available information related to the project (e.g., originally certified EIR) and initial field reconnaissance, it is assumed that technical studies for the topics listed below will be prepared to support the NEPA EA. As stated previously, the technical studies described below will use, to the extent possible, analyses performed as part of the City's originally certified EIR. It is assumed that all other resources for which technical studies are not prepared will be addressed through documentation in the NEPA document itself (i.e., no separate technical study is required). Finally, an External Quality Control Certification will be signed by the author of each respective technical study for submittal to Caltrans to confirm conformance with applicable reporting requirements. Air Quality Study - The proposed project is not exempt from the requirement to demonstrate air quality conformity pursuant to applicable state and federal regulations. An important component of the air quality assessment, particularly in light of recent legislation, will be to determine of the project is a Project of Air Quality Concern (POAQC) pursuant to 40 CFR 93.123(b)(1) as it relates to PM2,5 and PM,o. In coordination with the City and Caltrans, URS will submit the necessary analyses to SCAG's Transportation Conformity Working Group (TCWG) to ascertain the project's conformity status. URS has recently coordinated with Caltrans to navigate projects successfully through the TCWG's POAQC determination process. A separate air quality conformity analysis, pursuant to Section 6005 Pilot Program under SAFETEA-LU also will be prepared for submittal to Caltrans and FHWA to assess potential operational-related impacts for key criteria pollutants (including, but not limited to, CO, PM,o, and PM2,5) pursuant to applicable local, state, and federal regulations. Cultural Resources (Section 106) Studies - A HPSR, including Area of Potential Effects (APE) Map and ASR, will be prepared pursuant to guidelines set forth under Caltrans' SER, Volume 2 (Cultural Resources). Consultation with the Native American community, including the Native American Heritage Commission (NAHC) and pertinent tribes recommended by the NAHC, also will be performed as part of the cultural resources documentation. Based on the findings of the City's originally certified EIR, there are no previously documented archaeological sites within the project area. Furthermore, no sites listed, or eligible for listing, on the National Register, State Register, or Santa Ana Register have been identified along the segment of Grand Avenue between First and Fourth Streets. As of January 1, 2004, cultural resource studies must be prepared and processed in accordance with the Programmatic Agreement (PA) among FHWA, the Advisory Council on Historic Preservation, the California State Historic Preservation Officer, and Caltrans regarding compliance with Section 106 of the National Historic Preservation Act, as it pertains to the administration of the Federal Aid Highway Program in California. A qualified architectural historian will conduct a field survey of each proposed project area to record buildings, structures, and historic features through photography and written descriptions. However, in accordance with the Section 106 PA, and based on findings included in the originally certified