Correspondence among

Date: Wednesday, December 09, 2015 2:47:17 PM FYI. Flint’s additional corrosion control inhibitor feed is now up and running. As a reminder this is on top of the corrosion inhibitor already present in the water purchased from DWSD. Stephen Busch, P.E. MDEQ Lansing District Coordinator Office of Drinking Water and Municipal Assistance Lansing and Jackson District Supervisor 517-643-2314 [email protected]

Revised. SHe the note on page two regarding stagnation times greater than 24 hours. i would orefar to use L& hours, fut the EPA notes recommended 24 hours sol went with that. Please int rne know if you have any other comments. Jirn ~ f think this can be shared with EPA aven if staff have further comments.

Updated lead and copper sampling instructions for residents/customers. We have modified our instructions to address concerns raised. We have not vetted this through any district staff to see if they have any other recommendations. This could be done concurrently with EPA’s review. xxxEND_PAGE:deq15_b768_2732_2732_1

FYi- revised version. I'm meeting at 2pm with Kory, Michelle and Jennifer,

Draft - not subject to FOIA] Iwas not involved in the decision on how much supplemental phosphate should be added when the city retumed to DYWSD waiter. My only other comment has to do with the first statement under the question, “Why is phosphate being added to our water?” The answer begins with, "Homes built before 1986 are more likely t have lead service lines and pipes.” itis my understanding that lead pining for service lines or household plumbing has not been used in Michigan since World War EE. The reference to 1986 likely comes from the fact that 1996 was the year EPA banned the use of solder coniaining 60% lead, and al the same time, formally defined lead free brass as being less than 8% lead. This change was incorporated into Michigan's State Plumbing Code in 1998, so in this state, June of 1988 is often cHed as the point at which high lead content scalder and plumbing components were prohibiied from being used, it would be more accurate to remove the reference to lead service lines and pipes in thai sentence, or at least separate therm from the 1996 reference, and use an older time reference for indicating which homes may stl have lead service lines or lead piping. Richard Benzie, PE. Chief Field Operations Section Office of Drinking Water and Municipal Assistance, MDEQ 547-284-6512

Date: Tuesday, November 24, 2015 3:10:48 PM | was not involved in the decision on how much supplemental phosphate should be added when the city returned to DWSD water. My only other comment has to do with the first statement under the question, “Why is phosphate being added to our water?“ The answer begins with, “Homes built before 1986 are more likely to have lead service lines and pipes.” It is my understanding that lead piping for service lines or household plumbing has not been used in Michigan since World War Il. The reference to 1986 likely comes from the fact that 1986 was the year EPA banned the use of solder containing 50% lead, and at the same time, formally defined lead free brass as being less than 8% lead. This change was incorporated into Michigan’s State Plumbing Code in 1988, so in this state, June of 1988 is often cited as the point at which high lead content solder and plumbing components were prohibited from being used. It would be more accurate to remove the reference to lead service lines and pipes in that sentence, or at least separate them from the 1986 reference, and use an older time reference for indicating which homes may still have lead service lines or lead piping. Richard Benzie, P.E., Chief Field Operations Section Office of Drinking Water and Municipal Assistance, MDEQ 517-284-6512

Date: Tuesday, November 24, 2015 3:10:00 PM | was not involved in the decision on how much supplemental phosphate should be added when the city returned to DWSD water. My only other comment has to do with the first statement under the question, “Why is phosphate being added to our water?“ The answer begins with, “Homes built before 1986 are more likely to have lead service lines and pipes.” It is my understanding that lead piping for service lines or household plumbing has not been used in Michigan since World War Il. The reference to 1986 likely comes from the fact that 1986 was the year EPA banned the use of solder containing 50% lead, and at the same time, formally defined lead free brass as being less than 8% lead. This change was incorporated into Michigan’s State Plumbing Code in 1988, so in this state, June of 1988 is often cited as the point at which high lead content solder and plumbing components were prohibited from being used. It would be more accurate to remove the reference to lead service lines and pipes in that sentence, or at least separate them from the 1986 reference, and use an older time reference for indicating which homes may still have lead service lines or lead piping. Richard Benzie, P.E., Chief Field Operations Section Office of Drinking Water and Municipal Assistance, MDEQ 517-284-6512

Date: Tuesday, November 24, 2015 1:48:25 PM We need to discuss this as a group, | am not comfortable with some of the statements made in this document. George L. Krisztian Flint Action Plan Coordinator Laboratory Director Michigan Department of Environmental Quality Desk ph (517) 284-6719 Cell ph (517) 420-5897

FYi— not sure who else should be asked to provide comments.

Importance: High We need to have ¢ new list of objectives for this week that we will submit to the Governor next week, George L. Krisztian Flint Action Plan Coordinator Laboratory Director Michigan Department of Environmental Quality Desk ph (517) 204-6779 | Cell ph | PPI j

While Pat has put together a more complete document, I’m suggesting we share something like the attached as a summary of what the protocol should contain. Your thoughts? This e-mail is DRAFT DELIBERATIVE AND NOT SUBJECT TO FOIA. xxxEND_PAGE:deq04_b062_1921_1921_1

Dat ‘Thursday, October 01, 2015 3:42:21 PM FYI.

Dat “Thursday, October 01, 2015 3:42:22 PM FYI.

FYI.

Date: Friday, January 23, 2015 7:20:41 AM Just forwarding this to keep everyone in the loop. Please pass this on as you see appropriate. Thank you! George George L. Krisztian Laboratory Director Michigan Department of Environmental Quality (517) 335-8812