OFTEC Oil Storage Tank Regulations

Question 1

What is the minimum distance a plastic oil storage tank must be sited from a building under the Oil Storage Regulations?

Accepted Answer

1.8 metres from a building (unless fire-protected)

Answer

Under Building Regulations and OFTEC guidance, a plastic (polyethylene) oil tank must be at least 1.8 metres from any building, unless a 30-minute fire-rated barrier is installed between the tank and the building.

Question 2

What is the purpose of a secondary containment (bund) for an oil storage tank?

Accepted Answer

To contain oil leaks and spills, preventing environmental contamination

Answer

Secondary containment (bunding) catches any oil that leaks from the primary tank, preventing it from contaminating soil, groundwater, or watercourses. It is a legal requirement in many situations under the Oil Storage Regulations.

Question 3

What percentage of the tank's capacity must the bund be able to hold as a minimum?

Accepted Answer

110% of the tank capacity

Answer

The bund must hold at least 110% of the primary tank's capacity. The extra 10% accounts for rainwater accumulation and potential expansion of the oil. This ensures complete containment even in adverse conditions.

Question 4

Under which UK regulations is oil storage of 3,500 litres or more in a commercial setting specifically controlled?

Accepted Answer

The Control of Pollution (Oil Storage) Regulations

Answer

The Control of Pollution (Oil Storage) (England) Regulations 2001 (and equivalent in Wales, Scotland, and Northern Ireland) set requirements for oil storage above certain thresholds, including mandatory secondary containment.

Question 5

What is the maximum capacity of a domestic oil storage tank that can be installed without requiring Building Regulations approval in England?

Accepted Answer

3,500 litres

Answer

In England, oil storage installations of 3,500 litres or less for domestic use can be self-certified by an OFTEC registered technician without a separate Building Regulations application, provided they comply with all requirements.

OFTEC Practice Test

OFTEC Practice Test

OFTEC Oil Storage Tank Regulations