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City of Everett WPCF Chlorine Contact Channel Isolation Valve Replacement <br /> <br /> Scope of Services 4 <br />Assumptions and Meetings <br />Not Applicable. <br />Deliverables <br />None. <br />Task 300 – Design <br />Objectives <br />To provide bid-ready plans, specifications, and opinion of probable construction cost (OPCC) <br />based on the proposed improvements described herein. <br />BHC Services <br />The design services for this task will be conducted under three (3) separate subtasks <br />(50 percent design, 90 percent design, and final design). The work to be included under each <br />subtask is as follows: <br />Subtask 301 – Preliminary Design <br />1. Evaluate different valve options (e.g. plug valve, gate valve, and butterfly valve) for the <br />chlorine contact channel isolation valve in terms of how they could fit into the existing <br />valve vault. <br />2. Examine how much of the old rail car pad adjacent to the chlorine contact channel <br />isolation valve would need to be demolished to replace the valve versus physical and <br />cost impacts of demolishing the entire pad. <br />3. 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 />valve for Lift Station No. 1. <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 valve at <br />Lift Station No. 1) will be split evenly between the two scopes 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.