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Polk County resource‑recovery facility reports dioxin exceedance on Unit 2; board approves retest and engineering run
Summary
County staff told commissioners that the facility’s Unit 2 exceeded a federal dioxin‑furan standard on one run during a recent required stack test. The board authorized a $26,685 testing and engineering contract and staff said a retest is already underway.
Polk County staff told commissioners on July 2 that a recent three‑year stack test at the county’s resource‑recovery facility recorded a dioxin‑furan spike on Unit 2 that exceeded the federal limit on the averaged result from three test runs.
The county’s testing firm returned laboratory results showing Unit 1 met limits and Unit 2 had two acceptable runs followed by a third “spike” that pushed the averaged value over the federal threshold. County staff said they filed a notice of deviation with state regulators and have been negotiating with the Minnesota Pollution Control Agency (MPCA).
“Unit 2, the first two runs looked very good. And the third one, we hit something in there and it spiked badly. It…
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