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pipe. All permits will be procured to perform the potholing. All potholes will backfriled using native soil and capped with permanent cold patch. If duct banks are potholed, the top and bottom of the duet batik will be field verified 6. Survey and Right -of -Way A, Provide survey control using County GpS points, C, Leighton will complete laboratory testing and perform geoteclmical analysis of the collected data. D. Leighton will prepare a geoteclmical report presenting the findings and recommendations, hicludiug groundwater conditions, ease of excavation, temporary shoring design, and pipe bedding recommendations. B. Provide field survey profile over dee 9. Alignment Selection proposed sewer pipeline at 100 -foot intervals. This is a similar approach to A. Tetra Tech will prepare preliminary what we used for tlee Westminster Avenue drawings (30% milestone) as required to establish agreement on scope, alignment, Sewer Improvement Project. parameters, maintenance concerns, C. Field locate and dip existing sewer constructability, traffic Impacts, and manholes, connection points and storm general disruption to the area. We will drain crossings along the proposed submit the preliminary design to the City alignment for all pipelines. of Santa Ana staff for review and approval. D. Tetra Tech will prepare dre base reaps The basis of design technical memorandum will address the following subjects: using the above survey information, street improvement plans (tire latest, most recent 1) Evaluation of replacement in same improvement plans), and supplemented alignment verses parallel alignment with Google aerial map. Tetra Tech will 2) Water and sewer main alignment, plot utilities on the base maps based on including evaluation of the impact to information obtained from the utility adjacent businesses, residences and information as well as from USA markings traffic In the field, Tetra Tech will perform all 2) Manhole locations and connection to necessary research to obtain the necessary existing manholes right -of-way information, 3) Maintaining existing service 8. Geoteclneical Investigation connections 4) Hydraulics based on slopes A. Leighton Consulting, .Inc. will perform tine 5) Method of construction, especially at geotechnical investigation, The the major street crossings gootechnical exploration will provide the 6) Traffic control concepts design team and Contractor with tine 7) Construction schedule and pleasing expected subsurface and groundwater and construction cost estimate conditions at the project site that will assist 8) Conflicts with other utilities in design and construction of the proposed 9) Potholing recommendations improvements, 10) Abandonment of existing water and B. Leighton will perform subsurface sewers (if select parallel alignment) 11) Areas where construction is exploration consisting of drilling, logging wodc limited or controlled and sampling of three (3) hollow -stcm 12) Permit requirements auger borings to a depth of 15 feet below the existing grade. The borings will be 12, CEQA Dacumentatioti spaced along the length of the project. The borings will be backfilled with soil cuttings A. Tetra Tech will prepare documentation and patched with cold -mix asphalt. Traffic required to fidfill the California Environmental Quality Act (CEQA) control will be provided, as necessary. requirements. We have assumed a Negative Declaration will be required for hL ",4L d; cline \Ihnno,rnloRVTRS PY204F W1hJ _SA Oi,Callcnpvu [4- TETRA TEE" 25C -45