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Environmental Board July 30, 2025 Page 4 Mr. Hoffman stated that he will go back to the original parties involved and let them know that there are some options and possibilities the City can work with them on, but that the board does not seem comfortable moving forward with a pilot program at this time involvingchemical treatments without further analysis. Mr. Hoffman also stated that he will reach out to some engineering firms that the City has connections with, as well as reach out to othermetrocities that are doing similar things with their residents. As this evolves, there is potential that the City can bring this back with additional information leading to apilot program. Mr. Parsons inquired as to whether the chemicals just bind the nutrients, not letting them release into the environment. He then added that he believes it’s more the odor that concerns people, so implementing an aeration system with a type of bio system might be beneficial. Mr. Hoffman confirmed that with chemical treatments, it’s justbinding the material and not treating it, so it’s not improving the water quality within the pond. Mr. Hoffman also explainedthataeration may not address the underlying concern of odor coming from the pond. He noted that a lot of things can be cleared up from a staff level through ordinance updates to clarify what is and isn’t allowed in the stormwater ponds to help reduce inputs ofpollution. The long-term goal is to do something where eventually the ponds will be able to balance themselves out without interaction. Ms. Buchmeier inquired if other cities are doing non-chemical options like aerators. Mr. Hoffman stated that a lot of other cities will have aerators within ponds on private property that are under storm water easement, so it’s still part of the storm water system, but the land isn’t owned. He also said that it varies from city to city. He mentioned that it will take multiple years of data because of the fluctuation of weather and rain levels, which is why testing is so expensive. Ms. Buchmeier asked if the plan is to update the city code to be more specific to what is and is not allowed. Mr. Hoffman stated he’d like to have those discussions at future work sessions to see if they need to make those clarifications. Additionally, Mr. Hoffman notedthat they’ve been handling cases internallyso far andwantedto get a clear understanding ofwhat is planned going forward so he can communicate that to residents. Ms. Buchmeier wanted to confirm that there wouldnot be a pilot program for the chemical treatment of storm ponds. She also would like to know what the next steps are going to be. Mr. Hoffman reiterated that the pilot program was just for the chemical side of it. He noted that allowingaerators and other non-chemical methods would be something they would bring back to the board. These non-chemical methods would not be a lengthy DRAFT MINUTES