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Xcel Energy Inc. will use the injection equipment on a new plant near Pueblo, Colo., and also will install the equipment on two existing units there. The ash will be dumped in a 250-acre onsite landfill.
But even if there is a drop in recycling, the trade-off might be worth it.
"The benefits of the additional (emission) reductions from these controls is immense," Millett said.
In Nebraska, the dump sites are closely regulated, said Bill Gidley, a section supervisor with the state's Department of Environmental Quality. Landfills must have liners to collect seepage, and they are inspected every year.
This month, the Maryland Department of the Environment ordered the operator of an 80-acre Anne Arundel County coal ash dump to clean contaminated water detected near the site. Cancer-causing metals were discovered last fall in almost two dozen wells in the area. BBSS Inc. also was fined an undisclosed amount.
In a 2000 report, the EPA promised to re-evaluate the potential risks of coal ash and is developing regulations for disposal of coal byproducts in landfills, spokeswoman Roxanne Smith said.
There are ways to remove the pollutants from emissions without making the ash unusable. But that equipment can be up to four times more expensive, adding millions of dollars to the cost of meeting EPA guidelines, Goss said.
"The utility's primary goal is to provide cheap, dependable electricity for you, the consumer, connected to the grid," he said. "In order to do that and maintain compliance, sometimes the only thing they can do is make the ash unusable."
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