Air Pollution Control Equipment Services, Emissions

Dominion Energy puts new emission control equipment into operation at West Virginia power station


MT. STORM, W.Va., March 15, 2002 — Dominion Energy, the electric generating unit of Dominion, has completed construction of new emission control systems at its Mt. Storm Power Station and placed them into operation, reducing sulfur dioxide emissions.

The two new scrubbers should have a positive impact on environmentally sensitive areas such as Shenandoah National Park in Virginia and the Dolly Sods Wilderness Area in West Virginia.

The scrubbers will remove 95 percent, or about 100,000 tons per year, of the SO2 emissions from Units 1 and 2. Unit 3 was equipped with a scrubber in 1994. The new scrubbers have been operating since mid-January. Final testing and adjustments were completed this month. The cost of the two-scrubber project was about $120 million.

“Dominion Energy prides itself on being a sound environmental steward, and the completion of this project reflects that commitment,” said Thomas F. Farrell II, chief executive officer.

Sulfur dioxide has been linked to acid rain and reduced visibility in Shenandoah National Park and the Dolly Sods Wilderness Area.

Scrubbers operate by spraying a mixture of pulverized limestone and water into the exhaust gas of the generating units. Inside the scrubber vessels, calcium in the limestone reacts with the gaseous SO2 to form calcium sulfate, commonly know as gypsum. Gypsum from the scrubbers will be trucked to nearby mines and used to help reclaim highly acidic mine water runoff.

The scrubbers are part of Dominion Energy’s strategy to reduce S02 emissions as part of Phase II of the Clean Air Act Amendments of 1990.

In addition, the station is working on a $250 million project to install environmental controls to remove nitrogen oxide emissions from all three of Mt. Storm’s units. Nitrogen oxide has been linked to the formation of ground- level ozone. This selective catalytic reduction system should be complete by spring 2004.

“When we complete the installation of all these controls, Mt. Storm will be one of the cleanest coal-fired plants in the world,” Farrell said.

Mt. Storm Power Station is located near the West Virginia/Maryland line, about 150 miles west of Washington, D.C. Each of the three units at the station has a design capacity of 550 megawatts.

Dominion, headquartered in Richmond, Va., is one of the nation’s largest producers of energy, with a production capability of more than 3 trillion British thermal unit of energy per day.

Its 22,000-megawatt generation portfolio is expected to grow to more than 26,000 megawatts by 2005. In addition to its more than 4.9 trillion cubic feet equivalent of natural gas reserves and more than 450 billion cubic feet equivalent of annual production, Dominion owns and operates 7,600 miles of natural gas transmission pipeline with a delivery capability of 6.3 billion cubic feet per day.

The company also operates the nation’s largest underground natural gas storage system, with more than 950 billion cubic feet of storage capacity. Dominion serves nearly 4 million retail natural gas and electric customers in five states, and owns a managing equity interest in Dominion Fiber Ventures LLC. For more information about Dominion, visit the company’s Web site at www.dom.com.