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DISCUSSION This section provides a summary of the City's workplan to address PFAS including efforts to date. Overview The City of Pleasanton distributes approximately 4,500 million gallons of treated water a year to 22,000 customers. Approximately 25% of that distributed water is sourced from the City's grou n dwater allotment of 1,140 MG/year. The remaining percentage is purchased from Zone 7. During the summer months, the City currently operates two (2) of its three (3) wells simultaneously (and in addition toZone 7 supplyvia the turnouts)to meet peak demands. Currently, having a 3rd well primarily serves as redundancy in case failure of a City well or Zone 7 facility is experienced. However, as recently as 2013 (pre -drought period), the City occasionally had to operate all three wells to meet peak summer demands. Loss of the ability to operate City wells due to potential future PFAS regulations poses a water supply risk to the City. Possible solutions to address the issue of PFAS regulations can be categorized into two main categories: 1) self -implemented and 2) regional. Self -implemented solutions consistof PFAS treatment at City groundwaterwells. Regional solutions can include participating in PFAS treatment at a regional facility or reducing/eliminating Citywell production and offsetting with increases in Zone 7 supply purchases. Technical feasibility, life cycle costs, ease of implementation, and desire to maintain local control of groundwaterare all factors that should be considered when evaluating possible solutions. There are also variables that need to be monitored as developments can significantly impactthe solutions being considered. These variables include: • DDW regulations—Which PFAS compounds will DDW regulate? Whatare the corresponding MCLs or response levels and what is the schedule forcompliance? • Futurewatersupplyneeds—What is the City's future water supply needsforwhich the impact of PFAS on groundwater production should be evaluated against? The City's ongoing Water Capacity Evaluation will evaluate future supply needs by creating demand projections and analyzing potential modified operational strategies. • City and Zone 7 hydraulic limitations —What hydraulic limitations exist on the ability to increase deliveries through existing Zone 7 turnouts and City's water distribution system, and whatare potential upgrades to improve both? This also is being evaluated as part of the City's ongoing Water Capacity Evaluation. • Zone 7 — What is Zone 7's desire for regional coordination based on solutions available for theirfacilities or due to operational and cost impacts to the managementof the groundwater basin? • Funding —What mechanisms are available to fund solutions and what is viewed as acceptable impacts to water rates? Thiswill be evaluated as part of the City's ongoing Water Rate Study. Work Plan Attachment2 provides an illustration of the work plan to address PFAS related issues. The plan requires the City to do the following: Page 3 of 9