hierarchy.

It is hereby declared that the following preferred hazardous waste management practices hierarchy is to be used to guide all hazardous waste policies and decisions:

a. The generation of hazardous wastes is to be reduced or eliminated to the maximum extent practical;

b. Hazardous wastes that continue to be generated are to be recovered, reused or recycled to the maximum extent practical;

c. Detoxification, treatment or destruction technologies are to be utilized for hazardous wastes which cannot be reduced, recovered, reused or recycled; and

d. Land disposal of industrial hazardous wastes, except treated residuals posing no significant threat to the public health or to the environment, should be phased out as it is the least preferable method of industrial hazardous waste management.