415 ILCS 5/3.485
"Storage site" is a site at which waste is stored. "Storage site" includes transfer stations but does not include (i) a site that accepts or receives waste in transfer containers unless the waste is removed from the transfer container or unless the transfer container becomes stationary, en route to a disposal, treatment, or storage facility for more than 5 business days, or (ii) a site that accepts or receives open top units containing only clean construction and demolition debris, or (iii) a site that stores waste on a refuse motor vehicle or in the vehicle's detachable refuse receptacle for no more than 24 hours, excluding Saturdays, Sundays, and holidays, but only if the detachable refuse receptacle is completely covered or enclosed and is stored on the same site as the refuse motor vehicle that transported the receptacle to the site.
Nothing in this Section shall be construed to be less stringent than or inconsistent with the provisions of the federal Resource Conservation and Recovery Act of 1976 ( P.L. 94-480) or regulations adopted under it.
415 ILCS 5/3.485