The Washington Wastewater Treatment Plant team includes, from left, Kevin Massmann, operator 3; Doug Grafrath, operator 3; John Zimmermann, chief operator;Kevin Quaethem, water/wastewater superintendent; David Pickett, wastewater collections operator
Hikers and bikers on the trail past the newly upgraded Washington (Mo.) Wastewater Treatment Facility probably have no idea about the innovative technology at work beyond the fence. But Kevin Quaethem, John Zimmermann and their staff already have learned a great deal about their...
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