Abstract: A method of treating a contaminated refrigeration fluid including the steps of transferring, separating, returning, moving and removing. The transferring step includes the transferring of a portion of the contaminated refrigeration fluid from a refrigeration system to a first tank. The separating step includes the separating of refrigerant from the portion of the contaminated refrigeration fluid resulting in the refrigerant and a refrigerant depleted portion. The returning step includes the returning of the refrigerant to the refrigeration system. The moving step includes the moving of the refrigerant depleted portion to a second tank. The removing step includes the removing of oil from the refrigerant depleted portion.