I've finally got around to using one of the storage tanks as part of a small fuel dump...
Base if a 10x10cm MDF base, painted with MDF primer. I paint the big sheet of MDF with primer on both sides, as this seals the surface, avoiding dust and preventing the board from warping when I add texture/paint. The fuel tank is one of the model railway items (used to be from a dairy tanker wagon?), bund wall from cork floor tiles, corrugated metal from a mushroom punnet.
The gantry is made from mesh offcuts from a bird feeder, shaped using a pair of pliers.