February 12, 2016 6:50 pm Potomac River Oil Spill Came From Dominion Power The Coast Guard said Friday that oil samples from Potomac River came from a Dominion Virginia Power transformer station in Crystal City. News4’s Mark Segraves reports. Local 26:00 DC student grazed by gunfire while in class: The News4 Rundown 2:07 Program gives returning citizens second chance — and opportunity to pay it back 2:57 Driver accused of intentionally causing fatal crash granted bond 2:51 Sarah Jakes Roberts reclaims power in new book tour 3:12 Historic Blaine Mansion on Dupont Circle for sale