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Oil and Gas

Association of Oil Pipe Lines
  202-408-7970      1808 Eye Street NW, Suite 300, Washington D.C, 20006 Detail
AOPL is a nonprofit organization whose membership is comprised of owners and operators of liquid pipelines.

Independent Petroleum Association of America
  (202) 857-4722      1201 15th Street NW, Suite 300, Washington D.C, D.C 20005 Detail
IPAA has represented independent oil and natural gas producers for three-quarters of a century.

Washington Gas
  101 Constitution Avenue, NW, Washington D.C, 20080 Detail
Provides gas and distributing natural gas in the District of Columbia, Maryland and Virginia.