On-Site Voluntary Search Reveals Small Quantity of Tritium at Kewaunee Power Station

-No threat to public or station employees
-Findings limited to small area underneath station site
-U.S. Nuclear Regulatory Commission, state and counties notified

August 11, 2006

CARLTON, Wis. – Dominion said Friday it has found a small quantity of tritium in samples of water taken from a location directly beneath Kewaunee Power Station. The tritium found in this case poses no threat to station employees or the public. Other monitoring programs have found no indication of that minor level beyond a small area underneath the station.

Tritium is a naturally occurring isotope of hydrogen and is also produced by nuclear reactor operations. It is commonly found in water and generally is not considered hazardous. The samples containing small quantities of tritium are not from a drinking water source.

The company is evaluating the possible source of this tritium, which was detected in water samples obtained as part of an enhanced voluntary monitoring program initiated by the nuclear industry.

The findings were reported to the U.S. Nuclear Regulatory Commission as well as officials of Wisconsin, Kewaunee County and Manitowoc County.

Dominion (NYSE: D) is one of the nation’s largest producers of energy, with an energy portfolio of about 28,000 megawatts of generation. Dominion also serves retail energy customers in 10 states. For more information about Dominion and electrical safety, visit the company’s Web site at www.dom.com.

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Media: Richard Zuercher, (804) 273-3825