From the news article [link to www.wpsdlocal6.com]

"not an active release at the plant anymore." (so there was one.)
"spray from the water towers used to contain leaks." (there was at least one "active leak")
"Daple said that is standard emergency procedure at the site." (it is an emergency)
"...it is an in-house release. The sheriff's office says no one is in any danger." ??? (well if there's no danger, what's the emergency?)

"Emergency personnel are still working to determine a specific source of the release." (oh lord where do I start.)