“Operator” means a person who:
1. Owns, controls or is responsible for the operation and management of a storage tank or a discharge from a storage tank;
2. Previously owned, controlled or was responsible for the operation and management of a storage tank immediately before the use of the storage tank was discontinued;
3. Owns the property on which a storage tank is operated and managed, or was previously operated and managed if the use of the storage tank was discontinued; or
4. Owns property on which a discharge from a storage tank has occurred and is responsible for the management and cleanup of the discharge.