Correspondence between

Steve, We have filtered your universe list and taken out duplicates and township locations that do not have Flint water. We verified that there are open and active water accounts and have found and called active phone numbers and in most cases a contact name. I will work on additional filters for priority.

Steve, We have been going through the list and expect to have everything plotted and prioritized by Tuesday. Iam verifying through the Treasurers office which schools are open with active water accounts. Steve, Here is a list of Non-Public schools in Genesee County. There are only a few that are in Flint but all of the contact data is there. I have started working on a priority list and will have an update for you on Monday. Howard Croft Public Works Director City of Flint 1101 S. Saginaw Street Flint, MI 48502 PH# 810.766.7135 Ext.2043 herofi@citveffint. com xxxEND_PAGE:deq15_b429_1724_1724_1

Ok, Kory Groetsch, Toxicology and Response Section Manager will join me. Linda D. Dykema, PAD. Environmental Public Health Director Division of Environmental Health Michigan Department of Health & Human Services 517.335.8566 dykemal@ michigan gov

it sounds like from the meeting | just got out of the Lab would prefer to have the restaurants contact them directly. Let's touch base again tomorrow. We'll have to see if there Is an easy and convenient wey to distribute sample bottles and get them to the lab for analysis. Stephen Busch, PE. MDEQ Lansing District Coordinator Office of Brinking Water and Municipal Assistance Lansing and Jackson District Supervisor 517-643-2314 yortint Sent: Thursday, October 08, 2015 3:58 PM

Mike and Howard, Hope you had a nice holiday. EPA Region 5 wanted us to forward you the following EPA contacts for technical assistance as you see fit. | know you already had one individual from EPA participating on your Technical Advisory group. - Darren Lytle is with the EPA Office of Research and Development (resume attached) - Michael Schock also with the EPA ORD (info attached) My understanding from Region 5 is that Mike Schock is more of an expert on lead. If you have questions, | would suggest contacting them directly as they will be able to better describe what resources they are capable of providing. Stephen Busch, P.E. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MDEQ 517-643-2314 xxxEND_PAGE:deq18_b020_0553_0553_1

Mike, lam sending you and Steve a copy of the letter that we plan to include with the violation notice. This is set to go out early next week and I wanted to get your opinion. We have considered some type of water summary to accompany this as well but I am not certain if I can pull that together in time unless you have a specific recommendation. We continue to post the Monthly Operation Reports online within two weeks after the end of each month. Thank you, Howard Croft Public Works Director City of Flint 1101 S. Saginaw Street Flint, MI 48502 PH# 810.766.7135 Ext.2043 xxxEND_PAGE:deq16_b5_0892_4900_0386 Water Quality Update City of Flint Resident: In January we alerted you to the presence at that time of excess TTHM (total trihalomethanes) in Flint’s public water supply. TTHM — a byproduct of the water chlorination process — was found to be in excess of state guidelines (80 parts per billion) beginning in May 2014 and continuing into August. As soon as this excess concentration was discovered, we began taking steps to reduce it to within acceptable guidelines. We are pleased to report that we have succeeded in bringing the water to within acceptable guidelines. While we continue to work on improving aesthetic qualities, such as discoloration or odor, you can be confident that the water provided to you today meets all state standards. How did we did do this? With the help of LAN engineering, we upgraded the ozone treatment process at the Water Treatment Plant; increased water main/hydrant flushing to reduce stagnation; conducted small-scale testing of treatment to identify areas of improvement; improved overall plant operations; and enhanced the distribution system through water-circulation modeling. By November, all but one testing site was below the allowable levels and our most recent testing in February showed that every testing site was well below allowable levels, as shown below: City of Flint xxxEND_PAGE:deq16_b5_0892_4900_0387 Water Quality Update The Michigan Department of Environmental Quality (MDEQ) has been monitoring our progress, as noted in its March 5, 2015 letter to the city: “We are encouraged by the results from the most recent round of compliance samples collected on February 17, 2015, which naw show individual TTHM levels at less than half of the 0.080 mg/L standard ot ail locetions throughout the City’s system. Operational Evaluation Reports from December 2014, and February 2015, have identified possible causes and corrective measures for the previous elevated TTHM ievels, which we encourage the City to continue implementing. These madifications have likely contributed in part to the reduction in TTHM levels reported in the most recent querter, and suggest the Cy may be able to achieve compliance with the TTHM standard at all sites by continuing these efforts.” MDEQ However, because MDEQ monitoring of excess concentrations is based on four quarters of test results, we are required to again notify you that based on the most recent four quarters of test results (which includes excess concentrations beginning in April), the City’s annual quarterly testing average is not yet below the state’s allowable average. The attached notice (“Important Information about Your Drinking Water”) includes legally required language that summarizes the situation. Please review it and contact us with any questions. In addition, included in this mailing is a list of Frequently Asked Questions. We also have created a place for regular updates on the city’s website at cityofflint.com. We encourage residents who have concerns about the quality of their water to contact us immediately so on-site testing can be scheduled. If you have questions about this report or would like a test done at your home, free of charge, please call us at 810-787-6537. Maintaining safe water and improving its quality is a top priority, and we apologize for the concerns these notices have raised. We have taken many steps to improve the safety and quality of our water supply and will be taking more. As you may know, we have recently received a series of recommendations from several sources, including a report from international urban water system consultants, Veolia North America. We will be working with our recently created Citizen Advisory Committee and our Technical Advisory Committee to continue making improvements. Please track our progress on our website at cityofflint.com. Sincerely, City of Flint xxxEND_PAGE:deq16_b5_0892_4900_0388

Date: Tuesday, March 17, 2015 2:01:50 PM Howard, As Mike Prysby and | mentioned during our phone call earlier today, the City should be taking action to optimize water quality in the City’s distribution system which will in turn provide the City’s water customers with water quality that helps limit the potential for legionella occurrence in premise plumbing. It is recognized that contraction of Legionnaires’ Disease is not from ingestion of potable water and not regulated under Safe Drinking Water Act requirements. Further, there is currently no direct evidence of legionella in the City’s public water system. However, actions by the City of Flint water system can help minimize the potential for an outbreak in customer plumbing systems. These actions include the following: - Water main pigging and flushing to remove biofilm, tuberculation, and sediment throughout the distribution system. Failure to remove such material will limit the effectiveness of any disinfectant. Pigging is the preferred process and equipment can be obtained at minimal cost. As the growth range for legionella starts at 68 degrees F, conducting this work as soon as possible in the spring and early summer with cooler temperatures would help reduce the potential for formation under warmer water conditions. - aintain pH levels of 7.2-7.8 in finished water and distribution system when possible to maximize the disinfection and oxidation potential of the hypochlorous acid residual (versus the less potent hypochlorite ion). Any optimized corrosion control plan practices regarding pH levels must be taken into consideration. - aintain a minimum free chlorine residual of 0.5 mg/L throughout the distribution system when possible. Continuous residual at this level has been shown to be effective in control of legionella. (This will need to be balanced with requirements to limit TTHM formation and comply with the TTHM standard.) - Continuous operation and optimization of the ozone treatment equipment to treat raw source water. Ozone is highly effective in the destruction of legionella bacteria. - Conduct routine monitoring for legionella bacteria at the water treatment plant tap and at locations in the distribution system. Note: sample locations must take water directly off the main and not be from premise plumbing systems. Distribution locations could include storage tank inlets or pumping stations. Monitoring at the WTP plant tap would demonstrate removal of any legionella present in raw source water. A private laboratory that specializes in water sample analysis for legionella would need to be used. - Optimize water treatment plant operation for pathogen reduction under surface water xxxEND_PAGE:deq01_b440_4579_4580_1 004580 treatment rule requirements. Optimizing the removal for similar pathogens can help reduce the potential for legionella. A conference call with City staff would probably be best to facilitate further discussions of these actions in more detail. Mike and | can make ourselves available this week to discuss and answer any questions. Stephen Busch, P.E. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MDEQ 517-643-2314 xxxEND_PAGE:deq01_b440_4579_4580_2

Date: Tuesday, March 17, 2015 2:01:49 PM Howard, As Mike Prysby and | mentioned during our phone call earlier today, the City should be taking action to optimize water quality in the City’s distribution system which will in turn provide the City’s water customers with water quality that helps limit the potential for legionella occurrence in premise plumbing. It is recognized that contraction of Legionnaires’ Disease is not from ingestion of potable water and not regulated under Safe Drinking Water Act requirements. Further, there is currently no direct evidence of legionella in the City’s public water system. However, actions by the City of Flint water system can help minimize the potential for an outbreak in customer plumbing systems. These actions include the following: - Water main pigging and flushing to remove biofilm, tuberculation, and sediment throughout the distribution system. Failure to remove such material will limit the effectiveness of any disinfectant. Pigging is the preferred process and equipment can be obtained at minimal cost. As the growth range for legionella starts at 68 degrees F, conducting this work as soon as possible in the spring and early summer with cooler temperatures would help reduce the potential for formation under warmer water conditions. - aintain pH levels of 7.2-7.8 in finished water and distribution system when possible to maximize the disinfection and oxidation potential of the hypochlorous acid residual (versus the less potent hypochlorite ion). Any optimized corrosion control plan practices regarding pH levels must be taken into consideration. - aintain a minimum free chlorine residual of 0.5 mg/L throughout the distribution system when possible. Continuous residual at this level has been shown to be effective in control of legionella. (This will need to be balanced with requirements to limit TTHM formation and comply with the TTHM standard.) - Continuous operation and optimization of the ozone treatment equipment to treat raw source water. Ozone is highly effective in the destruction of legionella bacteria. - Conduct routine monitoring for legionella bacteria at the water treatment plant tap and at locations in the distribution system. Note: sample locations must take water directly off the main and not be from premise plumbing systems. Distribution locations could include storage tank inlets or pumping stations. Monitoring at the WTP plant tap would demonstrate removal of any legionella present in raw source water. A private laboratory that specializes in water sample analysis for legionella would need to be used. - Optimize water treatment plant operation for pathogen reduction under surface water xxxEND_PAGE:deq03_b621_4710_4711_1 treatment rule requirements. Optimizing the removal for similar pathogens can help reduce the potential for legionella. A conference call with City staff would probably be best to facilitate further discussions of these actions in more detail. Mike and | can make ourselves available this week to discuss and answer any questions. Stephen Busch, P.E. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MDEQ 517-643-2314 xxxEND_PAGE:deq03_b621_4710_4711_2

Howard, As Mike Prysby and | mentioned during our phone call earlier today, the City should be taking action ta optimize water quality in the City’s distribution system which will in turn provide the City’s water customers with water quality that helps limit the potential for legionella occurrence in premise plumbing. It is recognized that contraction of Legionnaires’ Disease is not from ingestion of potable water and not regulated under Safe Drinking Water Act requirements. Further, there is currently no direct evidence of legionella in the City’s public water system. However, actions by the City of Flint water system can help minimize the potential for an outbreak in customer plumbing systems. These actions include the following: - Water main pigging and flushing to remove biofilm, tuberculation, and sediment throughout the distribution system. Failure to remove such material will limit the effectiveness of any disinfectant. Pigging is the preferred process and equipment can be obtained at minimal cost. As the growth range for legionella starts at 68 degrees F, conducting this work as soan as possible in the spring and early surmmer with cooler temperatures would help reduce the potential for formation under warmer water conditions. - Maintain pH levels of 7.2-7.8 in finished water and distribution system when possible to maximize the disinfection and oxidation potential of the hypochlorous acid residual (versus the less potent hypochlorite ion). Any optimized corrosion control plan practices regarding pH levels must be taken inte consideration. - Maintain a minimum free chlorine residual of 0.5 mg/L throughout the distribution system when possible. Continuous residual at this level has been shown to be effective in contral of legionella. (This will need to be balanced with requirements to limit TTHM formation and comply with the TTHM standard.} - Continuous operation and optimization of the ozone treatment equipment to treat raw source water. Ozone is highly effective in the destruction of legionella bacteria. - Conduct routine monitoring for legionella bacteria at the water treatment pliant tap and at locations in the distribution system. Nate: sample locations must take water directly off the main and not be from premise plumbing systems. Distribution locatians could include storage tank inlets or pumping stations. Monitoring at the WTP plant tap would demonstrate removal of any legionella present in raw source water. A private laboratory that specializes in water sample analysis for legionella would need to be used. - Optimize water treatment plant operation for pathogen reduction under surface water treatment rule requirements. Optimizing the removal for similar pathogens can help reduce the potential far legionella. Aconference call with City staff would probably be best to facilitate further discussions of these actions in more detail, Mike and | can make ourselves available this week to discuss and answer any questions. Stephen Busch, P.E. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MDEQ xxxEND_PAGE:deq27_b422_2325_2325_1

Steve, Thanks for the input, I have made the changes and will address the rates as well. 1: niet SCHS Howard, Please revise the DEQ bullet points to as follows: Rale of the DEQ - Explanation of TTHM violation Delete all others. Thanks. Based on the calls we have been getting frorn your water custorners, our Office strongly recommends sameone from the City discuss the City’s water rate structure and what the City’s water rates are being used ta support. Stephen Busch, P.£. Lansing and Jackson District Supervisor Office of Drinking Water and Municipal Assistance MEEO, 517-643-2314 xxxEND_PAGE:deq16_b5_0892_4900_0758

Howard, Flease revise the DEQ bullet paints to as fallows: Role of the DEQ Explanation of TTHM vielation xxxEND_PAGE:deq21_b488_1368_1369_1 Delete all others. Thanks. Based on the calls we have been getting from your water customers, our Office strongly recommends sorneone

Here is the current agenda that I have assembled for our Wednesday night forum. I am looking for everyone to speak for about 10 minutes at the opening and then we will move to written questions. Ihave attempted to highlight each persons area of expertise as it relates to initial comments and I will moderate through the questions. We do not plan to have an open microphone. Starting time is 7:00 in the Dome, I will be available in City Hall for those that arrive early. Thank you all for participating, Howard Croft Public Works Director City of Flint 1101 S. Saginaw Street Flint, MI 48502 PH# 810.766.7346 Ext.2043 xxxEND_PAGE:deq21_b488_1368_1369_2

{will need to be dane before Li. Stephen Busch, PE. Lansing and Jackson District Supervisar Office of Drinking Water ancl Municipal Assistance MDE 517-643-2514

Mike, I wanted you to have a copy of the report I sent to the Mayor and EM today as an overview of the recent biol water advisory. Please let me know if anything here appears amiss. Thanks, Howard Croft Public Works Director City of Flint 1101 S. Saginaw Street Flint, MI 48502 PH# 810.766.7346 Ext.2043 [email protected] xxxEND_PAGE:deq04_b301_4071_4473_237 Rennaker, Joanne (DEQ)

Follow Up Flag: Flag for follow up _ Flag Status: Flagged Hello Steve and Mike. As you are aware, the City has undergone extensive upgrades to our Water Treatment Plant and it's associated facilities. Our intentions and efforts have been to operate our facility as the primary drinking water source for the City of Flint. Through consultation with your office and our engineering firm we've developed a system of redundant electrical systems, treatment processes and adequate finished water storage to negate the need for a signed back up agreement with DWSD due to their termination of our contract. Upon inspection of these facilities would you convey your concurrence that there is no regulatory requirement for us to sign a back up agreement with DWSD. Thank you Daugherty Johnson Utilities Administrator City of Flint | 3 | ; j xxxEND_PAGE:executiveofficeemails21_b1138_2882_2884_1 Piy sby, Mike (DEQ) ;