Wastewater collected from the Ohio train derailment site could be treated in Maryland, Baltimore City and Baltimore County officials announced Friday afternoon. Baltimore Mayor Brandon Scott said the city received a letter late Thursday from contractor Clean Harbors Environmental and Industrial Services, stating that the company has been selected by the Environmental Protection Agency to treat and discharge the wastewater collected from rain water at the city-run Back River Waste Water Treatment Plant in Dundalk. Clean Harbors wrote in its letter: "Clean Harbors proposes to begin receiving this wastewater immediately once approval is granted. The initial known quantity currently loaded in railcars is 675,000 gallons."