Michigan Association of Environmental Professionals Presents . . .
February 27, 2019
The city of Evart, Michigan (pop. 1,903) first detected perchlorate in one of its two municipal wellfields in 2015. The source of perchlorate was determined to be the annual Fourth of July fireworks displays at the County Fairgrounds, located directly adjacent to and hydraulically upgradient from the wellfield. The annual 30-minute shows were found to have deposited approximately 5 to 10 kg of unreacted perchlorate downwind of the launch site each year, in an area directly above the unconfined sand and gravel glacial outwash aquifer used for municipal supply. Being highly soluble in water, most perchlorate was efficiently transported to the aquifer during the first significant summer storm after each holiday event. Soil and groundwater investigations mapped the rapidly-developed and fast-moving groundwater plume as it was drawn toward the nearest municipal well in about 11 months. To minimize public exposure to perchlorate, the City actively managed the wellfield and constructed an additional supply well. However, residual perchlorate in the unsaturated soils persists as a long-term contaminant source. Perchlorate is not yet regulated by the Environmental Protection Agency or the State of Michigan under the Safe Drinking Water Act and is therefore not typically analyzed during routine water quality monitoring. Future regulation of perchlorate as a drinking water contaminant is likely to result in its unexpected detection in other small towns.
5:30 p.m. – 9:00 p.m.
Johnson Center @ Cleary University
3725 Cleary Dr.
Howell, MI 48843
February 27th PDF Registration Form
Schedule of Events:
5:30 p.m. – 6:15 p.m. – Registration and Cocktail Reception
CASH BAR ONLY - So, bring some cash for your beverages.
6:15 p.m. – 7:15 p.m. – Dinner
7:15 p.m. – 9:00 p.m. – Presentation Followed by Questions