Thirty to 40 gallons of oil recently spilled into Quarry Trail Metro Park's waterways, likely due to illegal dumping, according to a Metro Parks spokesperson.

During a storm in 1976, a barge partially sank near the mouth of the Potomac River, spilling 250,000 gallons of oil into the Chesapeake Bay and killing 20,000 to 50,000 waterfowl. Environmental ...