With greater emphasis on fluid longevity and fluid recycling, it is important to remember that water-based metalworking fluids are "consumable" and have a finite life. The selection of a treatment or disposal method is based on a number of factors, including the volume to be treated and other wastewater characteristics. It is important that the fluid treatment method comply with all applicable Local, State and Federal regulations. Castrol Technical Bulletin explains most commonly used conventional Metalworking Treatment procedures.