35 Ill. Adm. Code 218.928
Testing
Section 218
Section 218.928 Testing
a) When in the opinion of the Agency it is necessary to conduct
testing to demonstrate compliance with Section 218.926, the owner or operator
of a VOM emission unit subject to the requirements of this Subpart shall, at
his own expense, conduct such tests in accordance with the applicable test
methods and procedures specified in Section 218.105.
b) Nothing in this Section shall limit the authority of the USEPA
pursuant to the Clean Air Act, as amended, to require testing.