Any records, reports or information obtained under this chapter (i) shall, in the case of industrial user effluent data, be related to any applicable discharge limitation or prohibition, or permit condition, and (ii) shall be available to the public except under a showing satisfactory to the Public Works Director by any person that the records, reports or information, or particular party thereof, other than effluent data, to which the Director has access under this chapter, if made public, would divulge methods or procedures entitled to protection as trade secrets of the person. The Director shall consider such record, report or information, or particular portion thereof, confidential in accordance with the purposes of this chapter, except that the record, report or information may be disclosed to officers, employees or authorized representatives of the State of South Dakota or the United States concerned with carrying out the provisions of the Clean Water Act or when relevant in any proceeding under the ordinance codified herein or other applicable laws.