35 Ill. Adm. Code 724.215
Certification of Closure
Section 724
Section 724.215Â
Certification of Closure
Within 60 days after completion
of closure of each hazardous waste surface impoundment, waste pile, land
treatment, or landfill unit, and within 60 days after completion of final
closure, the owner or operator must submit to the Agency, by registered mail, a
certification that the hazardous waste management unit or facility, as
applicable, has been closed in accordance with the specifications in the
approved closure plan. The certification must be signed by the owner or
operator and by a qualified Professional Engineer. Documentation supporting the
Professional Engineer's certification must be furnished to the Agency upon
request until the Agency releases the owner or operator from the financial
assurance requirements for closure under Section 724.243(i).