Major source of Iowa air pollution has operated without permit updates for decades


Via Flickr

Grace Smith | November 29, 2022

For decades, a large gas-powered dryer in Muscatine, Iowa, that processes sand that it sells has not obtained updated permits to be able to operate the dryer, according to the Iowa Department of Natural Resources. 

Northern Filter Media, the company operating the gas-powered dryer, has been operating for over 100 years. In 1985, the company put in a new burner for the dryer, which was renovated in 2002, 2017, and 2020. 

Per the DNR, Northern Filter Media has operated the sand dryer unpermitted since its installation and the renovations. The DNR ordered the company a fine of $10,000. 

“This place has been there since 1914, and this is the first time this has come up,” said Vince Brown, a manager at the facility. “We don’t know what to do. We don’t know what the process is.”

In 2021, in an inspection of documents the DNR gathered of the Northern Filter Media, the department confirmed the facility is likely a “major source” of air pollutants following state rules and could deal with permit requirements based on Title V of the federal Clean Air Act.

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