(a) General Requirements. When an storage tank system is temporarily closed, owners and/or operators shall continue operation and maintenance of CP systems in accordance with Section 11. Owners and/or operators shall continue release detection in accordance with Part D as long as the tank contains more than one inch of regulated substance at the measuring point directly under the fill tube. Parts E and F shall be complied with if a release is suspected or confirmed.
(b) Six (6) months or more. When a storage tank system is temporarily closed for six (6) months or more, owners and/or operators shall also comply with the following requirements:
(c) Three (3) years or more. When a storage tank system is temporarily closed for more than three (3) years, the owner and/or operator shall complete a minimum site assessment in accordance with Section 29.
020-17 Wyo. Code R. § 17-30