Herbicide leaked from spilled containers after a heavy truck carrying freight crashed on State Highway 8 near Tarras, near Wanaka, early yesterday.
The south-bound freight truck, owned by Transworld Roxburgh Ltd, rolled on to its side on a 45kmh corner near Camp Creek, south of the Lindis Pass, about 20km from Tarras, about 2.15am yesterday.
Police said the 52-year-old driver was freed from the cab by firefighters and flown to Dunstan Hospital with minor injuries.
The crash reduced traffic to one lane, and a small amount of herbicide leaked from containers on board.
Transworld director Geoff Smith, of Roxburgh, said the driver had 12 months' experience on the Christchurch to Alexandra route.
