Dumbarton House Reduces its Carbon Footprint with Purchase of Carbon Offsets from Washington Gas Energy Services

Purchase Supports Sustainable DC and Chesapeake Bay Foundation

WASHINGTON--(BUSINESS WIRE)--Dumbarton House, a historic home and Museum in the District of Columbia as well as headquarters of The National Society of The Colonial Dames of America, today announced its purchase of 100% CleanSteps^® Carbon Offsets supplied by Washington Gas Energy Services, Inc. (WGES). The carbon offsets will be matched to 100% of the Dumbarton House natural gas usage.

“We are pleased to help Dumbarton House reduce its carbon footprint”

“After researching ways to be better stewards of the environment, we found that the purchase of 100% WGES CleanSteps^® Carbon Offsets matched to our natural gas usage was a logical next step,” said Karen L. Daly, Executive Director of Dumbarton House. “This purchase reflects Dumbarton House’s commitment to supporting Sustainable DC efforts to make the District the greenest, healthiest, most livable city in the country.”

Since the September 2010 launch of WGES CleanSteps^® Carbon Offsets, customer purchases are equivalent to eliminating nearly 19,000 metric tons of carbon dioxide from the air or taking 3,900 cars off the road for a full year. These purchases also prompted more than $100,000 in funding from WGES to the Chesapeake Bay Foundation’s Carbon Reduction Fund, which provides grants to farmers to aid in nutrient management efforts and support for local tree plantings.

"We are pleased to help Dumbarton House reduce its carbon footprint," said Harry Warren, president of Washington Gas Energy Services. "We commend the museum for their environmental leadership by demonstrating that simple steps can have a big impact on improving our local environment.”

About Washington Gas Energy Services

Washington Gas Energy Services, Inc. is one of the largest competitive providers of electricity and natural gas in the mid-Atlantic region and supplies more than 350,000 customers in Maryland, Delaware, the District of Columbia, Pennsylvania and Virginia. Headquartered in Herndon, Va., Washington Gas Energy Services is an affiliate of Washington Gas and a subsidiary of WGL Holdings, Inc. (NYSE:WGL). www.wges.com.

About Dumbarton House

The mission of the Dumbarton House museum, a Federal Period historic house, ca. 1800, is to preserve the historic structure and its collections and to educate the public about life in Washington, D.C., during the early years of the Republic. Emphasis is placed on Joseph Nourse, first Register of the Treasury, and his family, and their occupation of the property from 1804 through 1813. www.dumbartonhouse.org