25E - AGMT - ON-CALL ENGINEERING SRVS

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I ON-CALL ENGINEERING SERViCES Walafibyarras-tlgia" A distribution system may require piping modifications to allow for the Initial well discharge to waste or to the reservoir and not to the distribution system. Pipeffne.i0esfgn Tetra Techs previous experience will help the City to suooessfuliy address the key pipekne Issues including: agency requirements, utilities, traffic control, alignment selection, and construction phasing. Early on In the project; it will be Important to meet with the City Public Works to define the following: requirements: work hours, lane closures; storage of equipment; open cut verses boring of intersections; trench backfill; and pavement restoration, Tetra Toch will.perform our utility research immediately upon issuance of the Notice -.to -Proceed. The USA moiddngslot the geotechnical Investigation will also be used to verify Vie location of existing utilities. Any potholing services will be completed by use of the vacuum extraction method thereby minimizing pavement damage and trafficdisruption. in addition, a field walk will be completed to. took for evidence of Infrastructure (e.g, valve -carts, trench patch; vaults, etc,) as sorrie utility owners do not belong to USA Dig Alert, and others respond with only partially 'complete Information. We have learned the importance of taking extra steps to verify potential underground infrastructures. The proposed pipelines in tha sample project are stated to be located within on arterial: street. Therefore, traffic control will be.a major concern of the City. The traffic control requirements shall be determined with the objeGtiva pt prtoviding the Contractor with adequate room for safety as well as efficient operation while providing the least possible disruption to the traveling public. We believe traffic control is a key design element and should be completed hand-in-hand with the design of the pipeline. Similar to $A-15 Vault Relocation and San Lorenzo Lift Station projects, both have pipaUnesbeing constructed within Bristol Street, Tetra Tech will prepare the conceptual traffic control requirements, specifying the work area and proposed lane closures that are acceptable to the City: The contractor will be responsible for the,actual preparation of the traffic control plans based on these requirements. If the proposed pipelines cross a signalized intersection, Tetra Tech will evaluate whether a bore and jack operation or open -cut construction will be the most beneficial solution. Typically, Tetra Tech has been able to show that openwcut construction during limited work hours top during times of minimal traffic is the better solution verses bore and Jack operations due to the g.4 hours.,'7 day lane closures required for the plts. Proloot Management Over the years, Tetra Tech has established well defined, rigorous procedures for project management. These techniques have been developed and refined and have contributed to our success and reputation. The keys to our project management system ore communications, project planning, monitoring, and quality assurance. The Tetra Tech team's goal is to keep the City staff "in the loop" from day one of the project. Communication tools Include formal progress reports afforded through our project management system and an Informal give-and-take approach starting with Tom Epperson, our Project Manager, and extending to every member of the Tetra Tech team, At the project's outset, the chain of command and appropriate communioation.methods will be agreed upon and can be as formal or as informal as the City desires. We will use the entire communication spectrum, We will conduct formal meetings with agenda and typewritten notes, and we will use informal meetings with notes to file, We also will have documentation of telephone communications, with notes to file or letters of understanding as appropriate follow-up. @ttyat&anta Ana - 11 • TETRA TECH 25E-176