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Transportation company CSX says it expects freight operations to return through the District “within the next 24 hours,” following a 175-car train derailment on Sunday that forced the closure of rails, a Metro station, and roads near Ninth Street and Rhode Island Avenue NE.

“Overnight, crews successfully completed excavation of the soils that were impacted by an approximately 750-gallon leak of sodium hydroxide from a tank car that was damaged in the derailment,” the firm said in a statement on Tuesday. “The site is now being back-filled with clean material in preparation for rebuilding the railroad tracks that were damaged during the derailment.”

CSX notes that riders who use the MARC Brunswick and Amtrak Capitol Limited lines that share a track with the company should check with those respective operators about restoration of commuter service. On Tuesday, both MARC and Amtrak saw delays related to the incident.

The off-railing of 16 of the train’s cars—some of which contained chemicals including ethanol and sodium hydroxide—raised concerns among residents about hazardous materials traveling through D.C. In this incident, however, no one was injured, no evacuations were ordered, and investigators have not discovered any harms to nearby air and water quality.

“Yesterday five of the derailed rail cars were transported away from the site for inspection and further handling,” CSX says. “Eleven rail cars remain onsite; once the tracks are restored through the area they will be transported offsite by rail. Air monitoring continued throughout the night while excavation was underway; monitoring confirmed there were no adverse effects to air quality.”

The derailment occurred around 6:40 a.m. on Sunday, officials say. You can watch videos of it below:

Photo via DCFEMS