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REV: 08-05-22 RL Evaluate data uncertainty and recommendations for data improvement Consider results of the real loss component analysis and, if available, a leak simulation model and/or pilot leak detection results Develop a timeline, cost estimate, and key milestones associated with the water loss compliance plan, based on existing data sources 3.bLeak Detection Survey - Preparation, Kick Off, & Reporting If requested and approved by the Public Works Director or their designee on an annual basis, Consultant shall prepare the leak detection survey, host a kickoff call with City staff, and prepare leak detection survey reporting. 3.cLeak Detection Survey If requested and approved by the Public Works Director or their designee, Consultant shall provide acoustic leak detection survey services for hidden water loss identification and recovery. In this survey work, Consultant shall provide an expert leak detection technician to listen for leak noise on all available appurtenances on main pipe and service connections. Geophones and correlators shall be used to pinpoint and confirm potential leaks as necessary. In this task, Consultant shall: Prepare for and lead a leak detection kick off meeting to walk through the methodology and discuss procedures for traffic control, leak identification and leak confirmation. Perform a comprehensive acoustic leak detection survey Collaborate with the Public Works Director or his designee to ensure agreement on existence and location of leak findings Provide documentation of each suspected leakage event Task 4: Customer Meter Accuracy & Testing 4.a. Apparent Loss Analysis & Reporting Apparent losses result from customer meter inaccuracy, meter reading errors, data transcription errors, inaccurate consumption estimates, and theft. Apparent losses produce revenue loss, and the accuracy of apparent loss estimations affects insight into system leakage volumes. To assess apparent losses, if requested and approved by the Public Works Director or their designee, Consultant shall: Design a random and representative meter test sample Prioritize large customer meters for testing Analyze existing (and/or newly completed) test results Review and refine estimates for unauthorized consumption and systemic data handling errors Calculate and value apparent losses due to customer meter inaccuracy Recommend further study and customer meter management ATTY/AGR.2022.231/E Source Companies, LLC (Water Loss Consultation Services) (Page 15 of 17)