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THE CITY OF —•,,f p;*.fin ® —.1 in; W 111 LE ASANTON® MEMORANDUM iIsi/ i Date: April 27, 2020 1) To: Nelson Fialho, City Manager //9, From: Kathleen Yurchak, Director of Operations and Water Utilities Subject: Update on Well 5 and Emergency Response Plan Since the issues with Well.5 started in.December 2019, Utilities staff has collectively assessed the various implications ofthe loss of the Well, short-term supply impacts (summer 2020), repair options of the well,and other water supply considerations including the activation of Well. 8. Outlined below is a detailed overview of the emergency response plan and recommendation to repair Well 5 immediately through an emergency purchase order with Pump Repair Services, the City's as-needed contractor. If you authorize the PO with Pump Repair Services today, the pump manufacturer said they could expedite the refurbished motor/pump by two to three week. I have underlined authorized actions and recommendations throughout the memo and have indicated recommendations at the conclusion of the memo. Background Well 5 pump and motor were supplied andcommissioned by Pump Repair Service in late June , /early July of 2018 for approximately $167,000. Starting in November 2019, issues with the Well 5 MCC and chemical injection system combined with trying to stay below groundwater pumping quotas, resulted in no operation of Well 5 in December 2019 and into January 2020. In late January, Well 5 was operated but after a couple days of operation failed on January 30, 2020. The Utilities Division explored some fixes including replacement of the power feed cable that proved to be unsuccessful. As a result, the pump and motor were removed for inspection. The motor was sent back to the factory and was found to have failures that we were told were typically associated,with extreme heat (although that is not documented in the inspection report). The pump bowl assembly was sent to the shop of Pump Repair Service and was found to have wear that is nottypicalof a pump with this little run time. The well casing was visually inspected without any significant findings. Utilities staff has reviewed the inspection reports and is awaiting the casing video for review. With Well 8 currently not in operation due to higher levels of PFAS, the loss of Well 5 creates operational concern during the summer months where demand increases and typically 2 of 3 wells are operated in addition to Zone 7 turnouts to meet demand. Additionally, Well 6 is the oldest well and is the only well currently in operation. Page 1 of 4