sentences:  Many of the rail cars were overturned and potentially leaked hazardous material.On 11 September 2012 Stolthaven reported to the Louisiana Department of Environmental Quality that it had potentially leaked 97.3 gallons of benzene, 177,568 gallons of diethylethanolamine, 97.3 gallons of naphthalene, and large amounts of various other hazardous chemicals.The LDEQ immediately launched an investigation to determine the amount of chemicals spilled and to assess the hurricane preparedness of the Braithwaite terminal.