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For Release: 11/17/2008

Nitrogen Oxide (NOx) Reduced by 40 to 50 Percent

New Emission-Control Equipment Installed at Weston Units 1 and 2

Sent to Wausau media

(Village of Rothschild, Marathon County, Wis.) - The two oldest operating units at the Weston Power Plant, owned by Wisconsin Public Service, are undergoing environmental retrofits designed to reduce nitrogen oxide (NOx) emissions by 40 to 50 percent.

Nitrogen oxide contributes to acid rain, ozone and fine particulate emissions. These emissions are regulated under multiple state and federal air quality regulatory programs. The Weston Units 1 and 2 retrofits have been approved by the Wisconsin Department of Natural Resources (WDNR) and the Public Service Commission of Wisconsin (PSCW).

The two construction retrofit projects set to be completed in mid-December, include the installation of low-NOx burners and separated over fire air systems, or SOFA, on each of the unit's boilers. This work will be completed during the units' annual fall maintenance outages.

"This is part of our company's overall emission reduction control plan that has been targeted for our older coal-fueled generating units," said Kelly Zagrzebski, Wisconsin Public Service Community Relations Leader. "A total of seven units on our electric generating system will receive similar retrofits during the next two and half years."

Weston Unit 1 began producing 60 megawatts in 1954, while Unit 2 began generating 75 megawatts in 1960. By comparison, the new Weston Unit 4 completed earlier this year generates 535 megawatts using clean-coal technology.

To learn more about the project, visit: http://www.wisconsinpublicservice.com/news/nox.aspx.

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