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BACKGROUND The City has two sources of water supply: 1) water purchased from Zone 7 Water Agency and 2) City groundwater allotments (approximately 20% of total supplies). The City owns and operates three groundwater wells: Well 5, Well 6, and Well 8. Historically, the City needs two of these three wells operational during the summer months to meet customer demand. Currently, Well 8 is reserved only for emergency use due to detection of PFAS chemicals above recommended action levels. Therefore, keeping Well 5 and Well 6 operational is critical to reliably meeting customer demands during the summer. In June of 2018, the Well 5 pump was replaced due to the existing pump reaching the end of its useful life. The pump was commissioned and successfully ran through January of 2020. On January 30, 2020, Well 5 was taken out of service due to operational issues with the pump. The Utilities Division immediately performed investigations to determine the cause of the operational issues including inspection of the pump impeller and motor by the supplier and manufacturer and inspection of the well casing. Preliminary findings indicated the primary cause of the pump operational issues was failure of components within the motor. DISCUSSION Due to the criticality and time sensitivity of this issue, the Utilities Division is addressing the issue with two parallel paths. Path 1 focuses on returning Well 5 to service as soon as possible. This primarily consists of contracting with Pump Repair Service (original supplier of Well 5 pump) to repair the pump and assist the City with its installation and commissioning. Pump Repair Service has confirmed that the motor and pump can be refurbished for approximately $100,000 with a lead time of 8-10 weeks. There is not a significant cost savings in a refurbished motor, but there is a significant savings in delivery time as a new motor was estimated to be 20 weeks out. It is anticipated that the Well 5 pump can be repaired by the end of June 2020 and brought online by mid July 2020. Although staff is confident that the pump can repaired, there is concern about what caused the failure of the motor components after only one and half years of operation. To try to address this concern, the City is utilizing the services of Carollo Engineers (currently contracted to perform condition assessment of all City wells) to investigate if there was any external factors that may have led to the premature failure of the motor as opposed to the manufactured components simply being faulty. If external factors are discovered, they will need to be addressed prior to commissioning of the repaired pump. Path 2 focuses on developing contingency plans for the scenario where peak summer demands occur before Well 5 pump is repaired, installed, and commissioned. Contingency plans include the following: Page 2 of 3