Temporary Closure –
When an UST system is temporarily closed, owners and operators must continue operation and maintenance of corrosion protection and release detection in accordance with sections 654-8(b) and 654-14 of these regulations. An owner operator must permanently close an UST system that has been temporarily closed for more than a 12 month time period.
Permanent Closure –
At least 45 days before beginning permanent closure an owner operator shall obtain a permit to close permanently from the Department. Owner operator must empty and clean the tank. All tanks taken out of service permanently must be either removed from the ground of filled with an inert, solid material. Before permanent closure is complete, an owner operator shall measure for the presence of a release where contamination is most likely present at the UST site.