35 Ill. Adm. Code 725.506
Special Requirements for Incompatible Wastes
Section 725
Section 725.506 Special
Requirements for Incompatible Wastes
a) An owner or operator must not place incompatible wastes or
incompatible wastes and materials (see Appendix E to this Part for examples) in
the same treatment process or equipment unless it complies with Section
725.117(b).
b) An owner or operator must not place hazardous waste in
unwashed treatment equipment that previously held an incompatible waste or
material, unless it complies with Section 725.117(b).