Storage tank system owners and/or operators shall report all releases or suspected releases to the department within 24 hours of discovery in accordance with Section 22 and follow the procedures of Section 22. All confirmed releases shall also be reported to the fire department having local jurisdiction. Owners of sites where storage tanks were formerly located shall report to the department within 7 days after discovering any new evidence of a release.
(a) Release Reporting. Release reporting shall be made for any of the following conditions: - (i) Released Regulated Substances. The discovery by owners and/or operators or others of released regulated substances at a storage tank site or in the surrounding area (such as the presence of free product or vapors in soils, basements, utility lines, nearby surface water and/or groundwater).
- (ii) Unusual Operating Conditions. Unusual operating conditions observed by owners and/or operators (such as the erratic behavior of product dispensing equipment, the sudden loss of a regulated substance from a storage tank system, an unexplained presence of water in a storage tank, or liquid in the interstitial space of secondarily contained systems), unless:
- (A) The system equipment or component is found not to be releasing regulated substance to the environment;
- (B) Any defective system equipment or component is immediately repaired or replaced; or
- (C) Except as provided in Section 16(f)(ii)(D), any liquid in the interstitial space of secondarily contained systems that is not used as part of the interstitial monitoring method (e.g., brine filled) is immediately removed.
- (iii) Monitoring Results. Monitoring results, including investigation of an alarm, from a release detection method required under Part D that indicate a release may have occurred unless:
- (A) The monitoring device is found to be defective, and is immediately repaired, recalibrated or replaced, and additional monitoring does not confirm the initial result;
- (B) The leak is contained in the secondary containment and:
- (I) Except as provided in Section 16(f)(ii)(D), any liquid in the interstitial space not used as part of the interstitial monitoring method (e.g., brine filled) is immediately removed, and
- (II) Any defective system equipment or component is immediately repaired or replaced;
- (C) In the case of inventory control described in Section 16(a), a second month of data does not confirm the initial result or the investigation determines no released has occurred; or
- (D) The alarm was investigated and determined to be a non-release event (e.g., a power surge or caused by filling the tank during release detection testing).
(b) Off-site Impacts. Owners and/or operators of storage tank systems and owners of former storage tank sites shall follow the applicable procedures in Section 20 or 21 to determine if the storage tank system is the source of off-site impacts. These impacts include the discovery of regulated substances (such as the presence of free product or vapors in soils, basements, utility lines, nearby surface water and/or groundwater) that have been observed by the department or brought to its attention by another party.
020-1 Wyo. Code R. § 1-19