A closure shall not be considered complete until the Department has received written Certification of Closure which shall include the following:
- (1) The Certification shall state that all activities listed in the Department-approved closure plan were performed.
- (2) On a case by case basis, the Department may require that the Certification of Closure be prepared and signed by a registered professional engineer.
Added at 18 Ok Reg 1576, eff 6-1-01