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Professional Services Agreement - Arcadis US Inc - Secondary Treatment and Disinfection Improvements at WWTP
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Professional Services Agreement - Arcadis US Inc - Secondary Treatment and Disinfection Improvements at WWTP
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4/4/2025 2:03:30 PM
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7/24/2019 1:54:54 PM
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Board of Public Works
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Contracts
Document Date
7/23/2019
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The City will replace the existing doors and windows in the building and have masonry improvements <br />made as part of a separate project. This will be important to ensure air tightness in the building for the <br />scrubber. The existing building will be evaluated, and recommendations only will be made for necessary <br />improvements beyond those described here (i.e. new coatings for crane rail system). This scope does not <br />include design of those recommendations. <br />The chemical equipment is electrically fed from its associated building, which is currently being replaced <br />through another City project and is assumed can be reused. The City will continue to control the <br />disinfection system as it is today. The existing PLC will be replaced to accommodate the new equipment <br />and safety features and HMI screens will be updated. The existing chlorine residual analyzer, ammonia <br />analyzer and level instruments at the effluent weirs within the chlorine contact tank will be reused. The <br />location of the level transducer may need to be improved to provide a better, more accurate flow <br />measurement with the increased water surface elevations at higher peak flows. <br />In addition to the permanent system expansion, a simple temporary disinfection system will be designed to <br />ensure continued disinfection during construction of these disinfection improvements. <br />Note that the existing groundwater dewatering systems to prevent tank uplift are not functional. Temporary <br />dewatering will be specified to be provided by the contractor for tank protection. This will be included as a <br />separate bid item. The location of temporary wells will need to be restricted due to the electrical and <br />communication duct banks in this general vicinity. <br />Arcadis and its subconsultant will prepare bidding documents, provide assistance during bidding and <br />perform construction administration services. The City will perform construction inspection. The <br />subconsultant Donohue & Associates, Inc. will evaluate and confirm the return sludge pumps (including <br />drain) for Final Clarifier Nos. 1 through 5, replace the Aeration Tank Nos. 1 through 4 Pass 2 gates, and <br />provide electrical and I/C work for all project components. A SharePoint site will be established for use <br />during design, and PMIS will be established for use during construction. <br />The scope of engineering services shall include the following: <br />1. Project Management. Provide project management including scope, budget and schedule control; <br />project coordination; maintenance of records; project setup, invoicing, and close-out. <br />2. Kick-off and Design Review Meetings. Meet with the City to kick-off the project including a site visit <br />to perform initial above -ground field investigations. Meet in -person with the City monthly to share <br />progress, resolve outstanding items, perform additional field needs, and review deliverables and design <br />progress for 50% and 90% designs. In addition, up to four conference calls are included. <br />3. Survey. A survey may be required during design for key spot elevations. Any survey will be provided <br />via subcontract services. A $5,000 allowance is provided if survey is needed. <br />4. Preliminary (50%) Design. Conduct a preliminary design including the following tasks. <br />a. During the kick-off meeting, inspect Aeration Tank Nos. 1-4 from the surface to determine if <br />shutting down one aeration tank is required to determine the gate replacement and weir <br />extension needs. If required, the City will shutdown, dewater and clean one aeration tank for <br />inspection at a follow-on visit. At that follow-on visit, inspect Final Clarifier Nos. 1 through 5 <br />also to determine equipment replacement needs and extent of structural rehabilitation required. <br />This will require the City to shutdown, dewater and clean one or two clarifiers at a time. <br />b. Confirm existing return sludge pumps are adequate for process and to drain the tanks. <br />c. Confirm hydraulics to determine aeration tank weir configuration and elevation. <br />d. Confirm structural, instrumentation and control, and electrical needs. <br />.....Wo as auPages <br />(Exhibit A — Engineer's Services) <br />EJCDC E-500 Agreement Between Owner and Engineer for Professional Services <br />Copyright © 2008 National Society of Professional Engineers for EJCDC. All rights reserved. <br />
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