Maureen Ziskovsky a water craft inspector from the Department of Natural Resources in St. Paul uses a portable decontamination unit to clean off a boat before it enters the water on Green Lake in Spicer, Minnesota on Friday, August 19, 2011. The decontamination unit uses a three stage filter process and water heated to 140 degrees to rinse off water craft to make them clear of an invasive species such as zebra mussels.
Read the article: Boat Decontamination on Green Lake
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