“container” (“cynhwysydd”) means a single or double skinned fixed tank, a drum, a mobile bowser or (even if not connected to a fixed pipe or fixed pipework) an intermediate bulk container;

“drum” (“drwm”) means an oil drum or similar container used for storing oil;

“fixed tank” (“tanc sefydlog”) includes an intermediate bulk container which is connected to a fixed pipe or pipework;

“oil” (“olew”) means any kind of oil except uncut bitumen;

“premises” (“mangreoedd”) includes land but does not include vehicles or vessels;

“secondary containment system” (“system atal eilaidd”) means a drip tray, an area surrounded by a bund or catchpit, or any other system for preventing oil which is no longer in its container from escaping from the place where it is stored;

“small bore suction pipe” (“sugnbibell ceudod bychan”) means a suction pipe with a diameter of less than 8 millimetres.