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Tetra Tech will coordinate with the utility purveyors to obtain concurrence on the relocation and/ or protection strategies. In this way, we can avoid piecemeal work or moving a utility twice. If the relocation design is to be prepared by the utility owner (e.g., SCE), we will monitor and track their design progress with the schedule. We will employ our proven methodology to notice, catalogue, plot, track, and coordinate utility impacts. Tetra Tech will develop accurate substructure and utility maps to be used by the design team to avoid utility impacts or surprises. Utilizing USA Dig Alert's website, a comprehensive utility matrix and contact log will be developed, which Tetra Tech will use to request utility atlas information and document correspondence with each purveyor with regards to responses received and as necessary when a utility company requests to review the design plans. Research: Tetra Tech will seek to obtain and review all available documents for a current or proposed project, unless directed otherwise by the City of Santa Ana that the City has information readily available. Information of interest will include existing reports, studies, design plans, as -built plans and documents, benchmarks, centerline ties, aerial surveys and mapping, and any other pertinent and On -Call Engineering services available information that could be used in the design of the project. Geotechnical Investigation and Potholing: Tetra Tech proposes that a geotechnical field exploration be conducted at the proposed site to characterize the site conditions and support analysis and design of the proposed pipelines, lift/pump stations, facilities, wells, pavement improvements, bike paths, medians, landscaping improvements, and vegetated bioswale improvements as necessary to ensure proper design of the proposed project. During the field investigations, the team will coordinate with Underground Service Alert and a private utility locator may be utilized prior to performing soil borings. The team wil provide traffic control in accordance with the WATCH manual. Monitoring of all samples with a photoinization detector (PID) may be utilized to determine samples selected for environmental sampling. The team will backfill borings with cement- bentonite upon completion and patched to match existing surfaces, as needed and collect all cuttings in drums. Potholing will be performed in the immediate area of any pavement repair and reconstruction and spaced evenly throughout the project. The spacing of the potholing will also be based on visual changes of site conditions, as -built data and other research data to ensure that the existing pavement and subgrade sections are properly characterized. The collected data from the potholes will be used to determine design and recommend pavement section and repair methods to meet a 20-year life expectancy. Design and Drafting Services: Tetra Tech can provide staffing to assist the City of Santa Ana with a variety of services and design disciplines as needs arise. Our staff can assist the City of Santa Ana with plan review, engineering analysis and research, drawing preparation, construction observation, and special inspection. Tetra Tech has highly qualified engineers who will supplement City of Santa Ana staff under the direct supervision of the City of Santa Ana. There would be little or no learning curve since Tetra Tech can provide the City with experienced and credentialed personnel to meet their needs; individuals who can "hit the ground running" on a moment's notice. Tetra Tech's staff can become an extension and integral part of the City of Santa Ana's design staff. TETRA TECH