35 Ill. Adm. Code 724.299
Special Requirements for Incompatible Wastes
Section 724
Section 724.299 Special
Requirements for Incompatible Wastes
a) Incompatible wastes, or incompatible wastes and materials must
not be placed in the same tank, unless Section 724.117(b) is complied with.
b) Hazardous waste must not be placed in a tank system that has
not been decontaminated and which previously held an incompatible waste or
material, unless Section 724.117(b) is complied with.