b) The data base, and any bioassay procedure utilized pursuant to Section 808.245(a), shall consist of and use data and procedures which the Agency determines are a reliable basis for decision. Reliability of a source of data and procedures shall be assessed by reference to such factors as, but not limited to, scientific validity; consistency with directly observable data, including monitoring data; and the consistency of results of repeated applications of the data, procedures and formulae. Sources of data may include, but are not limited to, the following:

1. 1) Standard reference sources;
2. 2) Material published or incorporated by reference by a federal regulation or by a regulation adopted by an agency of the State of Illinois;
3. 3) The application under consideration and written communications between the applicant and the Agency or their representatives with respect to the application;
4. 4) Data and procedures previously used by the Agency in other wastestream categorization determinations; or
5. 5) Agency inspection, permitting and enforcement files relating to the generator or the wastestream, excluding complaint forms (except where the complainant will be available voluntarily for deposition and examination under oath at any hearing on appeal pursuant to Subpart G).