Liquid containment device and containment of leakage from a liquid reservoir

A liquid containment device capturing leakage from a piece of equipment, the liquid containment device being at least partly flatennable and slideable under said piece of equipment and comprising:

• a. a base defining a continuous upper surface for supporting said piece of equipment and a lower surface for facing a floor, said base having an outer periphery having at least one portion that is arcuate or curved about a middle of said upper surface, and
• b. a mechanically biased foldable peripheral wall, including at least one side, extending at rest upwardly above said upper surface towards an upper end from said base at said outer periphery and surrounding said base about said outer periphery to define an interior volume, said peripheral wall comprising at least one corrugated portion corresponding to said at least one curved portion of said base, each of said at least one corrugated portion comprising a plurality of tapered resilient flexible folds widening from said outer periphery towards said upper end to be unfoldable to expand the curved portion to allow the flattening of said at least one side such that said liquid containment device can be slid through a gap between said piece of equipment and said floor, the plurality of tapered flexible folds having a resilience creating a mechanical bias causing said resilient flexible folds to return to a folded position wherein said at least one side extends upwardly when said at least one side is slid past said piece of equipment.