STANTEC CONSULTING SERVICES, INC-2020-075-04

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ATTACHMENT A: SCOPE OF SERVICES AND SCHEDULE SCOPE OF SERVICES 1 — Preliminary Design 1.1 Utility Research and Data Collection We will collect the necessary information to complete the design, including location of all known utilities, and incorporate the information on the plans. A data collection tracking log with be kept to track the data collected and requested. We will request from the City the existing records, documents, and as -built plans for the City's facilities and improvements such as for street, water, sewer, and storm drain facilities. For the other utilities in the area or additional areas that may require utility requests, we will identify these utilities in these areas and make the additional requests as necessary and identified by DigAlert. We will review all the utility records collected and assess if any other research or communication is required to get all the data necessary for their design. 1.2 Survey and Mapping Survey and mapping will be performed and prepared in accordance with the City's standards. These tasks will include: • Existing right-of-way and base mapping: Monuments will be observed to retrace the centerlines and rights -of -way within the project limits. The results will be incorporated into a base map illustrating the existing right- of-way conditions. Aerial topography: Current aerial topography and existing planimetric data will be obtained. The photography will be flown for use at a scale of 1-inch = 20 feet, with contours compiled at one -foot intervals. Spot elevations and existing site features identifiable from the photography will be compiled, and color digital ortho-photo will be prepared. Supplemental field topography: Conventional ground survey will supplement the aerial effort to spot verify the aerial topography and obtain additional detail in connection points. This data will be used in conjunction with the aerial mapping to create a single topographic map to be used as a basis for design. 1.3 Flow Monitoring ADS will perform any required flow monitoring services. These services would typically capture flow data for one week, two weeks or four weeks. 1.4 Geotechnical Investigations Geotechnical investigations are proposed to be performed at the preliminary design phase of the project so that the appropriate determinations can be made based on the existing conditions of the project area related to the gravity pipe alignment as well as for the BMP effort. We will coordinate with the City prior to field borings performed to obtain an agreement as to the locations and alignment to be assumed. Ninyo & Moore will provide soil borings for the selected project alignment. The depth of the borings will be at least 3 feet deeper than the lowest required invert unless otherwise specified. The geotechnical report will contain soil classification, in -place density, relative compaction, sand equivalent, depth to groundwater (if any), soil stability related to trench excavation, and pavement section thickness. The soils report will be reviewed and approved by a registered geotechnical engineer. 1.5 Alternatives Analysis We will perform an alternatives analysis for the proposed gravity pipeline. It is assumed that up to three alternatives will be investigated related to the alignment of the proposed gravity pipeline. With the alignments analyzed, trenchless construction methods will be considered, such as pipe bursting, jack and bore, and other trenchless methods. These methods may only apply where the gravity pipe is to be straight between manholes. A matrix will be prepared that evaluates the different alternatives, and provides a ranking to help determine the selected solution. Criteria used for the evaluation matrix will be coordinated with the City, but is anticipated to include criteria such as ease of construction, traffic impacts, 5 Stantee City of Santa Ana I Prupx_al rurOn-Call * t r Reeocce� Ergneenrg Seivicps P.FP N, 19 10:: 5 Ix oY Sep, a, J _ 1--J _d=