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Kory - we'll work on getting you a draft sampling protocol by sornetime an Wednesday, Hope that works with your schedule.

Date: Friday, October 30, 2015 5:23:00 PM Kory — we'll work on getting you a draft sampling protocol by sometime on Wednesday. Hope that works with your schedule.

Hi George and Liane, To follow-up on cur meeting this last Tuesday, here is an update on the soonest the drinking water orotoco! for hornes is needed. Wes Priem, the section manager that will be overseeing the EBL investigations, has the contract with EFC (consulting firm} is starting next week. Technically, after that cortract begins, we can be asked to send ETC to investigate EBLs in Fling. Can that fit inte your timeline for developing the pratocal? We realize the time demand on this is tight, oo lat us know what is reasonable. Thank you, hory Groeisch, MS, Manager Toxicology and Response Section Michigan Dept of Health and HMurnan Services (MOHHS} 201 Townsend St. Lansing, Mi 48913 xxxEND_PAGE:deq15_b598_2115_2119_1 517-335-9935 groetschk @ michigan gov Confidentiality Notice: This message, including any attachments, is intended solely for the use of the above named recipient(s) and may contain confidential and/or privileged information. Any unauthorized review, use, disclosure, or distribution of any confidential and/or privileged information contained in this e-mail is expressly prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy any and all copies of the original message.

Hi Kary, Loar speak to your first question. Drinking Water is a very straight forward matrix that is easily analyzed by ICP/MS. We typically do not have to qualify the data very often. | have copied Kirby Shane an this e-mail. He is the Inorganics Unit Supervisor and he can assist you with your questions. Please note thal the terms ihat we use in the SOP are program specific as Lam sure that the terms that you use are specific fo your program. Kirby can assist you in creating a bridge between the terms thal we use. Please note however thet inese terms cannot be changed in the SOP as they are the terms that are used for compliance under the Safe Drinking Water Act. George George L. Krisztian Flint Action Plan Coordinator Laboratory Director Michigan Department of Environmental Quality Desk ph (917) 284- S713

Hi George, Can you have one of your staff provide us some more detailed understanding of the analytical detection limitations associated with Pb in drinking water analysis (SOP #800 Rev. #4)? What are the detection limits associated with this analytical method? (e.g. Method detection limit, limit of quantification, and/or reporting limit) Do you expect interferences in drinking water samples? In other words, should we expect a lot of data that is flagged? To help us speak the same language, below are some definitions of “detection limit”. For each detection limit related to this Pb SOP, it would be helpful if you described what the value represents or refer to one of these definitions: Thank you. Kory Groetsch, MS , Manager Toxicology and Response Section Michigan Dept of Health and Human Services (MDHHS) 201 Townsend St. Lansing, MI 48913 517-335-9935 sroetschk@michigan. goy Confidentiality Notice: This message, including any attachments, is intended solely for the use of the above named recipient(s) and may contain confidential and/or privileged information. Any unauthorized review, use, disclosure, or distribution of any confidential and/or privileged information contained in this e-mail is expressly prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy any and all copies of the original message. xxxEND_PAGE:deq16_b3_0014_0687_215