(a) In all contracts involving the expenditure of federal aid funds in relation to a public works project or improvement, this Act shall not be enforced in such manner as to conflict with any federal statutes or rules and regulations.
     (b) When federal expenditures are used in combination with State expenditures for clean-up and on-site disposal of hazardous waste, it shall be the responsibility of the Illinois Environmental Protection Agency to notify, with respect to such project, any Illinois hazardous waste cleanup contractor who has requested such notification of the date when bids will be accepted for such projects and the requirements necessary to successfully compete for such projects.