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City of Everett Lift Station No. 1 Valve Replacement <br /> <br /> Scope of Services 6 <br />2. Evaluate whether or not a backup bypass pumping system should be provided by the <br />contractor to convey flow from the diversion structure to LS-1 if there are concerns with <br />the old smaller lift station handling the diverted flow. This will look at hydraulics of the <br />diversion and capacity of the older smaller lift station versus historical flows. <br />3. Consider how a new plug valve would fit versus a gate valve at LS-1. <br />4. Prepare a brief draft technical memorandum summarizing the findings, evaluations, and <br />recommendations, which the City will utilize to provide direction for the 50% design via <br />comments received during a preliminary design review meeting. This direction will be <br />captured in a final version of the technical memorandum. A single technical <br />memorandum will be prepared covering predesign for this work and replacement of the <br />chlorine contact channel isolation valve at the WPCF. <br />Subtask 302 - Fifty (50) Percent Design: <br />1. Prepare 50 percent design level drawings including: general sheets, demolition plans, <br />major demolition sections, civil plan views, and major civil sections. Budget associated <br />with common drawings for the combined project (including replacement of the chlorine <br />contact channel isolation valve at the WPCF) will be split evenly between the two scopes <br />of services. <br />2. Prepare 50 percent design level specifications including: table of contents, construction <br />constraints and sequence, temporary facilities and controls, earthwork specifications, <br />and pipe specifications. Budget associated with common specifications for the combined <br />project will be split evenly between the two scopes of services. <br />3. Determine lead time for the new valve. If the lead time is long and the City chooses to <br />pre-purchase the valve, BHC will prepare a specification for the valve for pre-purchase. <br />4. Prepare 50 percent design level opinion of probable construction cost for the combined <br />project. Budget for this work is split evenly between the two scopes of services. <br />5. Prepare project schedule for the combined project. Budget for this work is split evenly <br />between the two scopes of services. <br />6. Perform QC review of the 50 percent design submittal for the combined project. QC <br />review will be performed by the project manager and a senior or principal level engineer <br />not directly involved in the design efforts. Budget for this work is split evenly between the <br />two scopes of services. <br />7. Submit 50 Percent Design Submittal for the combined project including plans, <br />specifications, opinion of probable construction cost, and project schedule to the City for <br />review. <br />8. One (1) site visit is assumed necessary for investigation/confirmation of site conditions to <br />support preparation of the 50 Percent Design Submittal. Budget for this site visit is split <br />evenly between the two scopes of services. <br />9. One (1) meeting with the City to review the 50 Percent Design Submittal for the <br />combined project and discuss City review comments. BHC will prepare notes to <br />document decisions. Budget for this work is split evenly between the two scopes of <br />services. <br />Subtask 303 - Ninety (90) Percent Design: <br />1. Address 50 Percent Design Submittal City review comments. Prepare and submit a <br />Record of Comment to clearly address the resolution to each City review comment. <br />Budget associated with addressing comments on the 50% submittal for the combined <br />project (including replacement of the chlorine contact channel isolation valve at the <br />WPCF) will be split evenly between the two scopes of services.