Bulk storage of oil and chemicals is becoming increasingly common and represents a major threat to the water environment.

Drums, IBCs and other containers should always be stored in a bunded area, preferably under cover (to prevent rusting and damage to the containers from the elements). A bund can consist of a raised wall, a stand alone sump and drainage system (both of suitable construction and impermeable to water or the materials being stored within it), plastic or metal spill pallets, storage cabinets or units.

Bulk tanks should be set within a bund of appropriate construction. The walls and floor must be impermeable to the materials stored within it, and there should be no external valves or drainage points.

The new Control of Pollution (Oil Storage) (England) Regulations 2001 give strict guidelines on acceptable construction and form of bunded storage tanks for oils including petrol, diesel, synthetic, mineral and vegetable oils.

Skips and containers for general waste should be kept under cover and in a suitably bunded area to prevent contaminated liquid leaching from the waste and entering site drains.

Action Points

1. Regularly check that bund walls are secure, with no damage or leakage. Ensure that overflow and filling pipes on all tanks discharge within the bunded area.
2. Fit automatic volume gauges and cut off valves, to indicate tank contents and to prevent spillages by over filling.
3. Regularly pump out rainwater, which may collect in the bunded area. If contaminated, this water should be disposed of in accordance with the Duty of Care or Special Waste Regulations, and NOT to the site drainage system.
4. Consider site security. Lockable valves should be fitted on storage tanks, perimeter fences should be secure and doors and gates kept locked.
5. Always use appropriate containers for different materials, and make sure that they are clearly labelled and in good condition (not liable to leak).

Eco Technology Limited can provide

• Bulk tanks and bunds in either steel or plastic, standard, or tailor made to your requirements, at very competitive rates
• Training for all staff in pollution prevention, storage and labelling of waste
• Spill pallets, containment and storage units for all drums, IBCs and containers