Correspondence between

Tom - Please arrange with ORD experts to work directly with MDEQ and provide Tim & | a status update by 3:00 pm today. Thanks

Aftiached is our draft letter to Flint regarding their lead and copper rnonitering results and 90" percentile determination for ther initial 2 sh-maonih LCR monitoring periods after the city converted from Detroil’s conventional treatment of Lake Huran to softening of the Flint River. This letler includes our directions for the ensuing steps and our recommendations as far as corrosion control optimization. Please provide any comments you may have by the close of business on Friday, August 14". We realize this response time is short, but we intend fo deliver this letter to the city on Monday, August 17". Thariks, Richard Richard Benzie, PLE, Chief Field Operations Section Office of Drinking Water and Municipal Assistance, MDEQ 517-284-6512 xxxEND_PAGE:deq21_b562_1593_1594_1

Tinka/Tim: We (R5 and OGWDW) had a call with the White House Strong Cities/Strong Communications Flint Liaison this morning. Below are my notes of the discussion. Flint Drinking Water Conference Call — 3/9/15 Participants: R5/GWDWB — Tom Poy, Jennifer Crooks HQ/OGWDW - Eric Burneson, Elizabeth Corr, Becki Clark, Roy Simon White House Strong Cities/Strong Communications Flint Liaison — Paul Joice (HUD) (works directly with Flint’s mayor) Tom Poy summarized what has gone on with Flint’s Drinking Water: - Switching from finished Detroit water (Lake Huron source) to Flint River in April 2014. - Karegondi pipeline will provide Flint with raw water from Lake Huron when completed in 2016. - MDEQ has been working with Flint from the start to get their treatment plant running properly. - Summer 2014, Flint had an E coli detect because of distribution system issues (broken valves causing stagnation of water). o Chlorine levels increased which increases potential of forming disinfection byproducts when chlorine reacts with organic carbon. o Flushing increased which can stir up sediment in the water mains. - December 2014, Flint exceeded the MCL for TTHM which is based on a running annual average (RAA) (avg of 4 quarterly samples). - MDEQ has worked with Flint since August 2014 when chlorine levels were increased, to tweak operations to reduce TTHM formation. xxxEND_PAGE:deq21_b561_1590_1592_2 - February 2015 sampling has TTHM concentrations well below the MCL but since compliance is based on an RAA, it will take another quarter or two of lower concentrations to make the average go down below the MCL. - Flint has hired a consultant to help with their PWS. - Flint has formed a Technical Advisory Committee (TAC) to help with their PWS; Dr. Michael Wright (ORD toxicologist) is EPA’s representative. - The Technical Advisory Committee met last week for the first time. Paul Joice said that he was at the TAC meeting but did not participate as there were not enough seats for the large crowd. He heard that it was a good meeting. Paul said that he would like Dr. Wright to be able to make a public statement about health effects. The public notice for the TTHM violations say that sensitive subpopulations should consult their physicians but the physicians don’t have any info on TTHMs. Paul had questions about Flint’s drinking water: 1) What are the health effects of TTHMs and what level of exposure is a concern? 2) What message should be provided on TTHMs? 3) What can be done about Flint’s aging infrastructure and falling population base? 4) What about citizen complaints about their water looking funny, tasting funny, and smelling funny? Paul said that having Dr. Wright on the TAC will help resolve Q1 and Q2. Paul said on Q4, that he lives in the city and his water looks and tastes fine. | said that taste and odor issues could be the result of the flushing that Flint had done due to the bacteria and TTHM problems. Flushing can stir up sediment in the pipes. | said that there have also been complaints about rashes from using the water but that this may not be solely due to high TTHM levels. It could be because of increased chlorine in the water, changes in water chemistry (pH, hardness, etc.). It would take some investigative work to determine what part of the distribution system is having these problems and would need additional health/medical data to try to figure out a cause. Paul said that many of the people who complained did not want to give out their home addresses. On Q3, | said that many systems across the country have aging infrastructure and while there is SRF monies available, this money does not cover the needs out there. Paul asked about regionalization. Eric Burneson acknowledged that there are economies of scale with regionalization but the benefits are realized more for smaller systems than ones the size of Flint. We could not generalize whether regionalization was a good idea for Flint and other communities in Genessee County because it is a very site specific issue. Paul said that our conference call helped him under the Flint situation better. Tom Poy Chief, Ground Water and Drinking Water Branch USEPA - Region 5 (312) 886-5991 xxxEND_PAGE:deq21_b561_1590_1592_3