Cement and diesel spilled out when a cement lorry overturned on a country lane.
All the emergency services were called out to the incident at about 10.45am, this morning, Wednesday, at the junction of Shenley Road and Briary View in Whaddon.
About three cubic metres of cement leaked into a ditch, and about 50 litres of diesel leaked into soil.
A man was treated by South Central Ambulance Service at the scene but did not require hospitalisation.
Firefighters from Great Holm attended to make the scene safe.