The Ministry of Environment had to be called in for a fuel leak on a transport truck Monday morning on the 401 in Chatham-Kent.
Around 11am, the driver of a westbound tractor trailer reported hitting an object on the highway causing one of the fuel tanks to rupture.
About 400L of diesel fuel spilled out onto the 401.
Emergency crews were called and the 401 westbound was temporarily closed to accommodate the clean-up.