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TASK 2 - ENGINEERING STUDIES AND FIELD INVESTIGATIONS 2.1 Data Collection Mark Thomas will research and obtain record data for the project site from the City and other sources as necessary. A detailed walk audit will be performed to document existing site conditions, including pavement and concrete conditions and ADA compliance. 2.2 Survey and Mapping Mark Thomas will provide control surveys, establishing the horizontal and vertical control. Aerial photogrammetry (40 scale) and field survey will be performed based on horizontal control (NAD83) and vertical control (NAVD88). Field survey will include data collection necessary for the task order needs and will include cross sections, visible utility and drainage facilities with invert elevations as necessary. 2.3 Right -of -Way Mapping Mark Thomas will perform record research of existing Record of Surveys, Subdivision and Parcel Maps, and Corner Records, to verify existing centerlines together with the necessary field survey ties. Mark Thomas will review Title Reports and supporting documents for use in determining property lines and easements to provide the base right-of-way map. 2.4 Utility Coordination Mark Thomas will identify and plot existing utility facilities within the project area from the acquired maps and as-builts, and coordinate with utility companies affected by the project. Mark Thomas will follow the Caltrans Utility Coordination Process (Caltrans Utility A-B-C Process). Any utility relocation, including adjustments to grade shall be processed and permitted with the various agencies and utility companies. We will coordinate and notify the City of any costs to be paid by the City for utility relocations early in the design process. We will pothole existing utilities crossings, underground structures, and other facilities that could pose a conflict with the proposed project. The Consultant shall track the progress/schedule of the utility company responses and relocation plan preparation in order to have the utility facility relocated prior to construction (preferred), or to ensure final approved utility relocation plans are documented in the City construction plans and the number of working days required by the utility company to construct their facilities clearly identified in the Special Provisions. 2.5 Geotechnical Investigations Mark Thomas, through our subconsultant EMI, will provide pavement studies and geotechnical investigations necessary for each task order. The efforts will include field investigations with shallow corings for pavement analysis and deeper borings necessary for structural analysis. Laboratory testing will be conducted on the sampled earth materials depending upon the project needs. Engineering analysis will develop findings and recommendations for design and construction. These will be documented in a memorandum or report, and include site conditions, geologic hazards, corrosivity, pavement, foundation design, liquefaction bedding and backfill and construction considerations. 2.6 Roadway Hydrology & Hydraulics Mark Thomas will prepare a roadway Hydrology and Hydraulics Report per the Orange County Hydrology Manual for surface and any proposed storm drain facilities designed to accommodate surface runoff. MARKTHOMAS ON -CALL ENGINEERING SERVICES Page A-10 City of Santa Ana