A system and method for storing and purifying used hydraulic fluid removed from an aircraft hydraulic fluid system includes a purification system that mounted on transportable cart. Used hydraulic fluid is transferred from an aircraft to a salvage tank that is mounted on the transportable cart. A hydraulic fluid purification module is also mounted on the transportable cart and is part of the purification system. The purification system may be fluidly coupled to an external system that supplies a motive source of flow energy, and may be selectively configured so that the used hydraulic fluid in the salvage tank passes through the purification module.