Correspondence among

Dear Mr. Busch, lam writing to confirm that you received my email below. | would appreciate your thoughts. Kindly, Yanna Lambrinidou Yanna Lambrinidou PhD Parents for Nontoxic Alternatives PO Box 6283 Washington DC 20015 P 202.997.1834 B www. dowasawaich blogspot.com

Dear Mr. Busch, Thank you for your quick response. | appreciate the information at, | am sure, a very busy time for you and MDEQ. Could you please help me understand the following? When you say that all previous optimal water quality parameter ranges would have been established for the Detroit water utility (not for the City of Flint), do you mean that MDEQ never set optimal water quality parameter ranges specifically for Flint before Flint's switch to Flint River water? It is my impression, please correct me if I'm wrong, that under the LCR, all large systems -- whether they are consecutive or not -- must have optimal water quality parameter ranges designated by states specifically for them (at the time when these systems are deemed to have optimized their treatment). Is there language in the LCR | am missing that allows a utility not to have optimal quality parameter ranges established specifically for it? My second question is this: If the City of Flint had no optimal water quality parameter ranges established specifically for it in the past, how did it achieve LCR compliance? Isn't it the case that utility-specific optimal water quality parameter ranges (and maintenance of these ranges) are required for all large systems to avoid an LCR violation? | would appreciate your assistance on this matter, as it will shed light on an issue that seems to be very important for EPA's assessment of and upcoming revisions to the LCR. Kindly, Yanna Lambrinidou Yanna Lambrinidou PhD Parents for Nontoxic Alternatives PO Box 6283 Washington DC 20015 P 202.997.1834 B

Dr. Lambrinidau, AU previous water quality pararneter ranges would have been established for the City af Filnt’s wholesale finished water supplier, the Detroit Water and Sewerage Departmant, not the City of Flint tisalf, As the City of Fint has nat yet established optimized corrosion control treatment, the MDEOQ ts not yet at the point of ragulatory requiremanis where the range of water quality parameters would be set. Stephen Busch, PLL. MDEO Lansing [istrict Coordinatar Office of Drinking Water and Municinal Assistance Lansing and Jackson District Supervisor SEL? -643-2344 xxxEND_PAGE:deq21_b504_1400_1401_1 [email protected]

Date: Monday, September 14, 2015 11:05:31 AM Dr. Lambrinidou, All previous water quality parameter ranges would have been established for the City of Flint’s wholesale finished water supplier, the Detroit Water and Sewerage Department, not the City of Flint itself. As the City of Flint has not yet established optimized corrosion control treatment, the MDEQ is not yet at the point of regulatory requirements where the range of water quality parameters would be set. 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]

Good morning Mr. Wurfel and Mr. Busch, As a member of the EPA National Drinking Water Advisory Council (NDWAC) Lead and Copper Rule (LCR) workgroup that just completed its recommendations to EPA about the agency's upcoming revisions to the LCR, | am watching with great interest and concern the developments in Flint in relation to lead. | am looking for information on the optimal water quality parameter (WQP) ranges that MDEQ has set for Flint's water. Are those posted online? If so, could you send me the link? If not, could you let me know what they are? Thank you kindly, Yanna Lambrinidou PhD Parents for Nontoxic Alternatives PO Box 6283 Washington DC 20015 P 202.997.1834 B www.dowesawatch bloaspol.com xxxEND_PAGE:deq21_b504_1400_1401_2

Good morning Mr. Wurfel and Mr. Busch, xxxEND_PAGE:deq15_b267_0983_1021_38 . As a swenker of the EPA National Drinking Water Advisory Council (NoWAc) Lead and Copper Rule (LCR) sworkareues that just completed its recommendations to EPA about the agency's upcoming revisions to the LCR, | am watching with ° great interést and concern the developments in Flint in relation to lead. 1 am looking for information on the optimal water - quality parameter (WOP) ranges that MDEQ has set for Flint's water. Are those posted online? If so, could yo send me the link? If not, could you let me know What they are? Thank you kindly, Yanna Lambrinidou PhD Parents for Nontoxic Alternatives PO Box 6283 Washington DC 20015 P 202.997.1834 B xxxEND_PAGE:deq15_b267_0983_1021_39