The Calumet oil refinery in Superior experienced its second power failure within two weeks on Saturday morning, causing several units to shut down and a yellow plume of smoke to be emitted.
Kollin Schade, the refinery manager, said the disruption occurred about 8 a.m.
The plume of smoke was emitted as pollution-control equipment automatically shut down and went into safe mode, which is what it?s designed to do, he said.
There was no public health or environmental risk, Schade said.
?That material going out is a clay-based material, and it?s considered a nonhazardous material,? he said. ?It doesn?t look good, but it?s nonhazardous.?
It was the second disruption Superior Water Light & Power has dealt with in two days, said Bill Fennessey, the utility?s manager of electric operations. Saturday?s outage was caused by a squirrel on a power line and interrupted service to a few customers for three or four minutes in addition to the partial shutdown at the refinery.
An outage at about 6 a.m. Friday was caused by a crow on a power line and affected customers in the waterfront and East End areas of Superior, Fennessey said. He didn?t know the number of customers affected.
Schade said the refinery previously experienced a power failure on July 16. That was more extensive than Saturday?s disruption.
Tags: news,?superior,?updates,?energy
Source: http://www.duluthnewstribune.com/event/article/id/273636/
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