Ill. Admin. Code tit. 35, § 808.501 – Order of Requesting Information

a) If possible, the Agency shall categorize the wastestream without requesting or using degree of hazard data pursuant to Section 808.430. However, nothing herein shall preclude the Agency from requesting or using degree of hazard data to confirm the characteristics of the waste.
BOARD NOTE: For example, if the waste is a categorical waste, it should be assigned to the type for that category without resort to degree of hazard data.
b) If, after requesting and receiving degree of hazard data pursuant to Section 808.430, the Agency still cannot determine the degree of hazard, the Agency shall request toxicological testing pursuant to Section 808.431.