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PFOS and noted the City currently tests for 18 PFAS chemicals. He hopes to expand PFAS testing with the Low Treatment Goal. In response to Councilmember Testa's inquiry, City Manager Fialho reported funding will be discussed with state representatives when final design and estimates are available at which time staff would come back to City Council with a financial plan for consideration. In response to Councilmember Brown's inquiry, Utilities Planning Manager Yamello advised staff will look at pre- and post-filtration in the design. He noted a universal vessel design is being considered to handle changing medium. He expects IX to get better over the next couple of years. He explained current testing for the design is focused on PFAS. Councilmember Brown commented she would like the design to cover as many chemical bases as possible. In response to Councilmember Brown's inquiry, Utilities Planning Manager Yamello reported Zone 7's 03 systems will not impact testing. He explained large volume field testing could be lengthy and does not work with the compliance schedule. He advised Orange County has completed large scale testing and can look at their results. He agreed a mobile unit could work with Well 8 but he would need to work with the state on that possibility. In response to Councilmember Pentin's inquiry, Utilities Planning Manager Yamello reported a Plan B of accessing Well 8 will be part of the evaluation and noted that centralized treatment is a big plus because it allows treatment for any well selected. In response to Councilmember Narum's inquiry, Utilities Planning Manager Yamello reported Q4 2023 is the estimated date that MCLs will be issued. He plans on construction beginning 01 2022 and continuing through 2023. He explained the analysis needs to be completed and it would be difficult to be more aggressive. He further explained Orange County was able to expedite their timeline by pre- purchasing the vessels. He advised staff is leaning towards IX because it did better for the Low Treatment goal but can switch to GAC at any time. Lastly, he explained GACs NPV is almost double that of IX. In response to Councilmember Narum's inquiry, Utilities Planning Manager Yamello reported recommending a centralized treatment or individual well treatment be included in the BODR. He stated centralized treatment at Well 8 gives the City the most flexibility and is more economical. Mayor Thorne opened public comment. Jill Buck expressed her support for the item. She encouraged City Council to consider pre-purchasing the vessels, supports a more aggressive timeline, and encouraged obtaining surface water from the state water project if necessary. Randy Brown expressed his support for the item and encouraged the City to look for federal and state grants for funding. Jack Balch encouraged City Council to direct staff to complete the cost-benefit analysis for all options including the two options that were dismissed. He encouraged staff to partner with Zone 7 as they are working on the same effort. Olivia Sanwong, President, Zone 7 Board of Directors, noted they have not considered treatment options. She advised Carollo Engineers have recommended looking at a site near their Chain of Lakes Well which is approximately 1.5 miles using existing roads from Well 8. She also noted they received a household cost of $22 to $29 per year from Carollo Engineers and recommended the City obtain a household cost estimate. City Council Minutes Page 5 of 9 September 1. 2020