Except as provided in paragraph (2), whenever on the basis of any information the Administrator determines that any person has violated or is in violation of any requirement of this subchapter, the Administrator may issue an order assessing a civil penalty for any past or current violation, requiring compliance immediately or within a specified time period, or both, or the Administrator may commence a civil action in the United States district court in the district in which the violation occurred for appropriate relief, including a temporary or permanent injunction.

In the case of a violation of any requirement of this subchapter where such violation occurs in a State which is authorized to carry out a hazardous waste program under section 6926 of this title, the Administrator shall give notice to the State in which such violation has occurred prior to issuing an order or commencing a civil action under this section.

Any order issued pursuant to this subsection may include a suspension or revocation of any permit issued by the Administrator or a State under this subchapter and shall state with reasonable specificity the nature of the violation. Any penalty assessed in the order shall not exceed $25,000 per day of noncompliance for each violation of a requirement of this subchapter. In assessing such a penalty, the Administrator shall take into account the seriousness of the violation and any good faith efforts to comply with applicable requirements.