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UST Permanent Closure UST removals are hazardous undertakings involving flammable and combustible liquids, excavations and confined space. Worker and public safety is vital. Out-of-service UST systems can also cause harm to the environment and must be properly closed. For these reasons, closure activity must be conducted by an Iowa Licensed Remover and a closure assessment must be conducted or supervised by a Certified Groundwater Professional according to 567—134.28 IAC. The UST system owner is responsible for contacting the qualified individuals to complete UST closure. The Iowa Licensed Remover must notify the DNR UST Section at least 30 days before removal, fill-in-place or change-in-service by completing the Notification of Closure form. An Iowa licensed remover must be on site for all regulated UST system closures. All closure documents are posted below. Removers will not receive the Underground Storage Tank Closure Guidance document. If you need an extra copy download it from the posting below. After receiving the completed Notification of Closure form, the UST Section will send out a letter to the owner and remover acknowledging the closure date. Removers must notify the DNR Field Office in the region where the closure is taking place (see closure guidance) at least one working day prior to closure. Follow the closure procedures in the guidance document. Make sure you notify the local fire department for permitting and other requirements before implementing any closure activity. A closure assessment must be conducted or supervised by a Certified Groundwater Professional (CGP) [567—134.28(2). Closure assessment procedures are found in the guidance document. Workers must not enter a tank pit excavation to obtain samples unless the proper shoring or sloping is in place. Evidence of contamination must be reported within 24 hours or 6 hours if a hazardous condition exists. The Iowa Licensed Remover is responsible for submitting the UST closure report form within 45 days of closure.
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