Correspondence among

Based upon discussions with Genesee County and the city of Flint, the portion of the 72-inch transmission main (pipeline) that was taken out of service, while the Flint Water Treatment Plant (WTP) treated water from the Flint River, was flushed and disinfected in accordance to AWWA Standard C651-14. Two sets of samples were collected from two locations 16 hours apart for total coliform analysis. The city of Flint and Genesee County has informed the DEQ that both sets of samples are Non-Detect for total coliform. Based upon the disinfection procedure and the absence of total coliform from both sets of samples, the un-used portion of the pipeline may be placed into service. xxxEND_PAGE:deq04_b526_4922_4923_1 Michael Prysby, P.E. District Engineer Office of Drinking Water and Municipal Assistance 517 290-8817 xxxEND_PAGE:deq04_b526_4922_4923_2

Date: Thursday, October 15, 2015 10:30:44 AM Based upon discussions with Genesee County and the city of Flint, the portion of the 72-inch transmission main (pipeline) that was taken out of service, while the Flint Water Treatment Plant (WTP) treated water from the Flint River, was flushed and disinfected in accordance to AWWA Standard C651-14. Two sets of samples were collected from two locations 16 hours apart for total coliform analysis. The city of Flint and Genesee County has informed the DEQ that both sets of samples are Non-Detect for total coliform. Based upon the disinfection procedure and the absence of total coliform from both sets of samples, the un-used portion of the pipeline may be placed into service. Michael Prysby, P.E. District Engineer Office of Drinking Water and Municipal Assistance 517 290-8817 xxxEND_PAGE:deq02_b433_3774_3774_1

Date: Thursday, October 15, 2015 10:30:44 AM Based upon discussions with Genesee County and the city of Flint, the portion of the 72-inch transmission main (pipeline) that was taken out of service, while the Flint Water Treatment Plant (WTP) treated water from the Flint River, was flushed and disinfected in accordance to AWWA Standard C651-14. Two sets of samples were collected from two locations 16 hours apart for total coliform analysis. The city of Flint and Genesee County has informed the DEQ that both sets of samples are Non-Detect for total coliform. Based upon the disinfection procedure and the absence of total coliform from both sets of samples, the un-used portion of the pipeline may be placed into service. Michael Prysby, P.E. District Engineer Office of Drinking Water and Municipal Assistance 517 290-8817 xxxEND_PAGE:deq02_b432_3773_3773_1