The Alexandria Hazardous Materials Team have cleared a leak at the GenOn Potomac River Generating Station after about 1,300 gallons of Sulfuric Acid spilled from a tank overnight.

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Final cleanup efforts were completed around 3:36 p.m. Wednesday.

The Alexandria Hazardous Materials Team responded to the GenOn plant on North Royal Street just before 2 a.m., but found that there was no active leak or fumes emitting from the area.

A large containment basin was holding the leaked material. There was no hazard to residents.

Portions of Royal Street, Bashford Lane and the Mt. Vernon Bike Trail were closed for about 90 minutes as a precaution. All were reopened by 4:45 a.m.

 The cause of the leak is still under investigation.