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<br />Page 1 <br />(Exhibit K – (Amendment to Owner-Engineer Agreement) – Attachment 1) <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 /> <br />This is EXHIBIT K, consisting of 5 pages, referred to in <br />and part of the Agreement between Owner and Engineer <br />for Professional Services dated December 8, 2020. <br /> <br />AMENDMENT TO OWNER-ENGINEER AGREEMENT <br />Amendment No. _1__ <br /> <br />1. Background Data: <br /> <br />a. <br /> <br />Effective Date of Owner-Engineer Agreement: <br /> <br />December 8, 2020 <br /> <br />b. <br /> <br />Owner: <br /> <br />City of South Bend, Indiana <br /> <br />c. <br /> <br />Engineer: <br /> <br />Black & Veatch Corporation <br /> <br />d. <br /> <br />Project: <br /> <br />Lead and Copper Rule Risk Management Evaluation <br /> <br />2. Description of Modifications: <br /> <br />a. Engineer shall perform or furnish the following Additional Services: <br />Phase 2 – Regulatory Evaluation and Risk Management Plan Development <br />Task 201 – Project Management and Administration <br />Provide project supervision, direction, and coordination with the Owner’s <br />management and staff. Project administration and management also includes <br />budget and schedule control, document control, coordination of activities, monthly <br />invoicing and project close-out. Engineer will maintain a change register of any <br />scope changes affecting the project budget or schedule and review it with the Owner <br />on a monthly basis for up to five months. Engineer shall discuss and receive written <br />approval for any scope changes from the Owner prior to proceeding. <br />Task 202 – Background Investigation <br />The Engineer will use water quality modeling software Water!Pro™ version 5.91 to <br />examine the impact of blending different source waters based on the hydraulic <br />modeling results. Up to 10 conditions will be modeled to evaluate the <br />aggressiveness of the water including theroretical solubilities of lead and copper as <br />well as corrosion indices such as Langelier Saturation Index, calcium carbonate <br />precipitation potential, Larson’s Ratio, and chloride to sulfate mass ratio. Water <br />Quality modeling will also be used to examine the impact of either adjusting the <br />pH/alkalinity or adding the corrosion inhibitor orthophosphate for each of the nine <br />treated source waters.