Correspondence between

Steve & Mike, Good morning, I hope you enjoyed your holiday weekend. I am contacting you on behalf of Howard to request a "quote". Howard is preparing a presentation for the City Council on Monday night in regards to this recent lead & copper news. He would appreciate a statement in regards to why corrosion control was not required by the City at the onset of using the Flint River, and how it took two rounds of lead & copper sampling to determine that "optimization" is required. I have explained to him my understanding, although for the presentation he is looking for a brief statement of a couple sentences to reference or quote one of you. Thank you, Mike Glasgow Utilities Administrator City of Flint 1101 S. Saginaw St. Flint, MI 48502 (810)766-7135 ext. 2602 xxxEND_PAGE:deq16_b5_0892_4900_0140

At this tine twill not be able to attend. Thanks for letting me know. Stephen Busch, PE. Lansing and Jackson District Supervisar Office of Drinking Water ancl Municipal Assistance MDE 517-643-2514

Steve, Mr. Croft would like to know, at the request of EM, if you or Mike, or both of you could be in Flint (9/11) Thursday morning @10:00 am. It looks like they have planned a press conference. Mike Glasgow City of Flint Water Plant

' Mike, Thanks for the information. Given these valve issues, would low pressure conditions less than 35 psi, be present in this portion of the system? If low pressure conditions exist, a cross connection or siphon condition where leaks.or breaks are present may be occurring. While longer transmission times may contribute to lower chlorine residual, the presence of coliform bacteria suggests contaminants have entered the system and their regrowth and resurgence could be assisted by the presence of a biofilm, tuberculation on the pipe walls, and/or phosphate coating. . Please continue with your investigation and let us know how the valve repair/replacement goes. Stephen Busch, P.E. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MDEQ 517-643-2314

Gentlemen, * ° Attached is a timeline of events that led us to the recent boil water notice. It shows all sampling and results