Bunded Oil Tanks

A bunded tank is a tank within a tank. Two tanks are manufactured, the (inner) tank is built to the capacity of storage that the tank is designed to meet and the (outer) tank is larger to allow the inner tank to fit inside and provide a minimum 110% bund area. The (outer) tank provides a secondary containment for leaks and spills of the (inner) tank and drastically reduces the chance of pollution to the surrounding area.

All non-domestic oil storage tanks over 200 litres need to be bunded. This relates to the storage of fuel at commercial, industrial or institutional premises.

Domestic installations will need an oil storage risk assessment to be obtained, the key requirements of this assessment are that you do not store over 2,500 litres. The tank cannot be cannot be located within 10m of a river or waterway, or on ground that could allow the fuel to travel to controlled water. The tank location cannot be within 50m of a borehole, spring or well. It can also not be located near to an open drain or loose manhole. The tank vent must not be visible from the fill point.

A form (TI/133D) can be obtained from OFTEC to complete a risk assessment.

There are now very specific rules governing the location of tanks and it’s important to take these rules into account if you are making subsequent changes to your property. The rules are in place for fire safety reasons and although a fire is highly unlikely to originate in a fuel storage tank, it is very important to protect the stored fuel from fires or heat sources nearby. To protect tanks from an ignition source, tanks should be sited:

• 760mm away from a non-fire rated boundary, such as a wooden boundary fence
• 600mm away from screening (e.g. trellis and foliage) that does not form part of the boundary.

If it is impossible to comply with the separation distances, the protection measures noted in OFTEC Technical Instruction Book 3 and British Standard BS5410 must be provided by means of a fire protection barrier (with a minimum 30 minutes fire rating) should be provided. The separation distance required between the tank and the fire barrier should be a minimal 300mm unless a greater distance is specified by the tank manufacturer.

For oil tanks with a nominal capacity of 3,500 litres or greater please contact your local Building Control Officer or OFTEC

There are now very specific rules governing the location of tanks and it’s important to take these rules into account if you are making subsequent changes to your property. The rules are in place for fire safety reasons and although a fire is highly unlikely to originate in a fuel storage tank, it is very important to protect the stored fuel from fires or heat sources nearby. To protect tanks from an ignition source, tanks should be sited:

• 1.8m away from non-fire rated eaves of a building
• 1.8m away from a non-fire rated building or structure (e.g. garden sheds)
• 1.8m away from openings (such as doors or windows) in a fire rated building or structure (e.g. brick-built house/garage)

If it is impossible to comply with the separation distances, then the measures noted in British Standard BS5410 and OFTEC Technical Instruction Book 3 must be provided, a fire protection barrier (with a minimum 30 minutes fire rating) should be provided. The separation distance required between the tank and the fire barrier should be a minimal 300mm unless a greater distance is specified by the tank manufacturer.

For oil tanks with a capacity of 3,500 litres or greater, please contact your local Building Control Officer or OFTEC.

There are now very specific rules governing the location of tanks and it’s important to take these rules into account if you are making subsequent changes to your property. The rules are in place for fire safety reasons and although a fire is highly unlikely to originate in a fuel storage tank, it is very important to protect the stored fuel from fires or heat sources nearby. To protect tanks from an ignition source, tanks should be sited:

• 1.8m away from liquid fuel appliance flue terminal

If it is impossible to comply with the separation distances, then the measures noted in British Standard BS5410 and OFTEC Technical Instruction Book 3 must be provided, a fire protection barrier (with a minimum 30 minutes fire rating) should be provided. The separation distance required between the tank and the fire barrier should be a minimal 300mm unless a greater distance is specified by the tank manufacturer.

For oil tanks with a capacity of 3,500 litres or greater, please contact your local Building Control Officer or OFTEC.

It is possible to site a fuel storage tank inside a garage or out-house; however, they need to be self-contained within a 60-minute fire rated chamber. For more information contact your local building control officer or OFTEC.

All oil tanks supplied by Tank Station are CE marked and manufactured from MDPE. Medium Density Polyethylene is the industry standard for fuel tank manufacture and is highly resistant against chemicals and fuels.

All oil tanks must be on a non combustible base, such as a concrete base, concrete lintels or paving slabs. A concrete slab should at least 50mm thick (preferably with reinforced mesh) and not on newly made up ground. The base should be at least 300mm larger than the tank foot print on all sides.

All oil tanks available from Tank Station are manufactured from UV resistant materials. These block UV rays and protect the fuel from degradation.

At Tankstation we are committed to providing our customers with the most efficient end to end service available. This can be tricky as we work with many manufacturers and they offer different lead times, but we will discuss this with you prior to order. Below are our general terms for delivery of tanks and all other products:

Delivery options based on request

Standard delivery options will include:

• parcel delivery for small items
• Kerbside delivery for manually handleable items
• Kerbside delivery for tanks and a tail lift unload capability or an unload capability on your end (this will be confirmed and agreed at time of order)
• HIAB (crane off load) delivery, this is available at an extra cost. This will be quoted at time of order and is based on your location.
• Articulated vehicle (approximately 16.5m long x 2.6m wide x 4m high). This will have no offload capability and will be the responsibility of the customer to provide a means of unloading, by way of telehandler or fork lift (please make a note of the product weight, to make sure your lifting machinery is suitable and capable). Any restrictions to access, such as narrow roads or height/weight restrictions and turning points MUST be stated at time of order. The driver may refuse to enter locations with restrictions that have not been previously stated and noted. We will do our best to provide the most suitable mode of transport based upon information received from the customer at time of order.
• 18 tonne tail lift vehicle (approximately 8.2m long x 2.6m wide x 4m high). This will have no offload capability and will be the responsibility of the customer to provide a means of unloading, by way of telehandler or forklift (please make a note of the product weight, to make sure your lifting machinery is suitable and capable). Any restrictions to access, such as narrow roads or height/weight restrictions and turning points MUST be stated at time of order. The driver may refuse to enter locations with restrictions that have not been previously stated and noted. We will do our best to provide the most suitable mode of transport based upon information received from the customer at time of order.

Please note that all deliveries are kerbside and it is the responsibility of the customer to arrange suitable machinery for positioning and placing tanks in location. On request we can provide HIAB (crane off load) delivery, but this will be at an extra cost and positioning of tanks will depend on safe and easy access to desired location.

Small items, such as accessories and anything that can be delivered via courier will be delivered within 1-3 days. Subject to stock availability and next day service is available on some items (at an additional cost).

This is possible, but it will depend on which stage the order has already reached. Please contact us as soon as you can and we will try to avoid any additional costs to rearrange the delivery address being incurred by you, but this cannot be guaranteed.

Unfortunately deliveries can only be made on weekdays.

It is advisable that you or a representative is at the delivery address on the day of delivery. This is in order to check the goods and sign for them, it is also required for unloading of large items when 'special' delivery arrangements have not been made.

All orders are followed up with an email confirmation and this will include delivery details and an estimated delivery date.

Small packages will be delivered by either Royal Mail or other couriers. The driver will leave a card with information how and where to collect the item from their nearest depot. Larger items, such as palletised goods, will need to be re-arranged for delivery and will most likely incur additional costs. Tanks and other goods that require HGV delivery will require additional payment and the delivery will have to be a re-arranged for a later date, as close to the original delivery date as possible.

Some products can be available for next day delivery service, but cut off times may vary. You should contact our sales team as early as possible to discuss opportunities for this service.

Lead times generally relate to products either in manufacture or about to enter manufacture, such as bespoke products and products that are not in general product (special order). Lead times are available on the product page and once an order is made we will update you weekly on the progress of completion and delivery of your product.