Ensure you comply with English legislation regarding the control of oil related pollution. It applies to anyone who stores and controls oil above ground. The legislation came into full effect in England from 1 September 2005. Similar regulations are expected to be introduced in Scotland, Wales and Northern Ireland.
There are penalties for non-compliance so ensure you comply. More details can be found at: www.environment-agency.gov.uk <Control of Pollution (Oil Storage) (England) Regulations 2001 PPG26>also check the Current Environmental Legislation.