Correspondence between

Kristen] ce: Shekter Smith, Liane (DEQ) Administrative Group Smith Liane]; Busch, Stephen (DEQ) Administrative Group Stephen]

Kris, What numerical value is assigned to “Not Detected”? For example a supply has 5 samples: ND ND ND ND 0.20 mg/L Is the ND assigned a numerical value = to the reporting limit or is zero (or some other value) used? Nit-picky for sure, | just want to have it clear in my mind. Thank you! George George L. Krisztian Flint Action Plan Coordinator Laboratory Director Michigan Department of Environmental Quality Desk ph (517) 284-6719 Cell ph (517) 204-0381

Attached are the instructions for calculating the 90th percentile. There are 3 examples. The 2"! example best explains interpolation. xxxEND_PAGE:deq25_b109_1051_1052_1 Let me know if you have questions. Koos Kris Philip 517-284-6518 xxxEND_PAGE:deq25_b109_1051_1052_2

Attached is a very rough draft of the brochure, “understanding your drinking water results” with comments fram community health and me. i will bring copies ta the meeting. i diciri't reflect back to see if Lois’s concerns were aif addressed, but | don’t believe sa. As this brochure is used for after the sample was collected, | rernoved the info about sample caliection to keep to one sheet of paper. i dic not keen most “track changes” on, except in the areas that i have real concern, | arn happy to provide ther if you are interested, << File: Understanding Your Drinking Water Sample Results with comments.doc >>