(a) The Presiding Officer shall conduct the hearing in a fair and impartial manner, take action to avoid unnecessary delay in the disposition of the proceedings, and maintain order. The Presiding Officer shall permit oral statements on behalf of the respondent and EPA. The Presiding Officer may address questions to the respondent's or the EPA's representative(s) during the hearing. Each party shall ensure that a representative(s) is (are) present at the hearing, who is (are) capable of responding to questions and articulating that party's position on the law and facts at issue. Apart from questions by the Presiding Officer, no direct examination or cross-examination shall be allowed.

(b) Upon commencement of the hearing, a representative of EPA shall introduce the order and record supporting issuance of the order, and summarize the basis for the order. The respondent may respond to the administrative record and offer any facts, statements, explanations or documents which bear on any issue for which the hearing has been requested. Any such presentation by respondent may include new documents only to the extent that respondent can demonstrate that, through no fault of its own, such documents could not have been submitted before hearing in accordance with the requirements of § 24.14 (c) and (e). The Agency may then present matters solely in rebuttal to matters previously presented by the respondent. The Presiding Officer may allow the respondent to respond to any such rebuttal submitted. The Presiding Officer may exclude repetitive or irrelevant matter. The Presiding Officer may upon request grant petitioner leave to respond to submissions made by respondent pursuant to this paragraph or § 24.14(e).