19E - SANTA ANA GRADE SEPARATION PROJECT

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Santa Ana Blvd. Grade Separation Table 4 - Cost Breakdown Construction Cost $43.3M Roadway $33.1M Structures $10.2M Right -of -Way $15.6M Total Project Capital Outlay $59.9M Support (PS &E, Right -of -Way, Construction, Program Management) $12.3M Total Project Cost $71.2M 6 ENVIRONMENTAL DETERMINATION Caltrans is the National Environmental Policy Act (NEPA) Lead Agency for this project. Initially, Caltrans determined that the appropriate environmental documentation for NEPA compliance is an Environmental Assessment (EA). Refer to Attachment J for the Preliminary Environment Study (PES). However, upon the completion of the required technical studies and public meeting, it was determined that the project is Categorically Excluded (CE). The Categorical Exemption / Categorical Exclusion Determination Form is included as Attachment K. The project is also Statutorily Exempt (SE) from the California Environmental Quality Act (CEQA) per Section 15282(g). City has filed the Notice of Exemption (NOE) as the lead agency on June 23, 2014. The PES recommended the following technical studies to support these documents: Traffic Study; Noise Study Report; Air Quality Assessment Report; Initial Site Assessment; Water Quality Memorandum; Natural Environmental Study- Minimum Impact; Visual Impact Assessment; Relocation Impact Memorandum; Historical Property Survey Report; Archaeological Survey Report, Historic Resources Evaluation Report, and Community Impact Assessment. The Environmental Commitment Record listing various mitigation measures is included as Attachment L. The result of the Traffic Study is included in Section 4.5 and the results of the remaining studies are included as follows: 6.1 Noise Study Report (NSR): The NSR determined that six of the 16 modeled receivers (representative of six residences or noise - sensitive receptors) would approach or exceed the FHWA/Caltrans noise abatement criteria (NAC) for Activity Category B and C land uses with the implementation of the project. Noise abatement in the form of soundwalls was considered. Two soundwalls were found to be acoustically feasible and the estimated cost to construct was compared with the reasonable allowance. NB -2 was determined to be reasonable to construct at heights of 12 to 16 feet. During construction of the proposed project, noise from construction activities would intermittently dominate the noise environment in the immediate area of construction. Conventional construction equipment is expected to generate maximum noise levels ranging from 75 to 99 decibels (dB) at a distance of 50 feet, while noise from pile driving, if necessary, would generate maximum noise levels of approximately 101 dB at a distance of 50 feet. Noise produced by construction equipment would diminish over distance at a rate of about 6 dB per doubling of distance. No adverse noise impacts from construction are anticipated because construction would be conducted in accordance with the Department's PROJECT REPORT EQUIVALENT 19E -22 13