Amendment No. 1 to OEA - Additional Funding for Lead & Copper Rule Risk Management Evaluatio – Black and Veatch Corporation

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Page 2 (Exhibit K – (Amendment to Owner-Engineer Agreement) – Attachment 1) EJCDC E-500 Agreement Between Owner and Engineer for Professional Services. Copyright © 2008 National Society of Professional Engineers for EJCDC. All rights reserved. The Engineer will conduct a virtual workshop with the Owner to review available water quality data, distribution system maps, etc. and to discuss our initial findings and water quality modeling from the background investigation. The Engineer will lead the workshop and the project manager and corrosion control specialist will participate. The results of the background review will be summarized in the risk management plan technical memorandum and will form the basis for the prioritization of the Risk Management Plan detailed in Phase 1, Task 104. Task 203 – Regulatory Evaluation The Engineer regularly attends USEPA stakeholder meetings and will leverage these activities to ensure that the Owner has access to the latest updates. A regulatory review related to lead and copper release in the distribution systems will be conducted for the Owner, ensuring the Owner is informed of anticipated changes allowing the Owner to better position and leverage existing resources to comply with future anticipated changes to the regulations. This information will be incorporated into the Risk Management Plan, discussed in Task 103. Task 204 – Risk Management Plan Development Engineer will provide recommendations that focus on the Owner’s water distribution system and provide guidance on the actions anticipated to be of the most benefit to the Owner. Based on the regulatory review and evaluation of system specific data, Engineer will develop a matrix of risk-mitigating options for the Owner to consider in the Risk Management Plan. This would likely include a discussion on the potential benefits of: • Additional distribution system monitoring, in the form of a monitoring plan developed by our team • Flushing program • Operational changes (maintaining existing treatment) • Treatment changes, including implementation of corrosion control • Bench or pilot scale testing of any proposed corrosion control options • Pipe replacement program modifications • Public outreach and education A workshop will be conducted virtually by video/teleconference by the Engineer to review the Risk Management Plan in detail with Owner input to prioritize those mitigation measures expected to be the most effective. Options will be “scored” based on anticipated benefit, cost, time to implement, positioning for compliance with likely future regulations, additional impacts, and other criteria established