1. (a) One time per 12-month period for each laboratory, an eligible academic entity may opt to conduct a laboratory clean-out that is subject to the applicable requirements of Sections R315-262-200 through R315-262-216, except that:
2. (1) if the volume of unwanted material in the laboratory exceeds 55 gallons, or 1 quart of liquid reactive acutely hazardous unwanted material or 1 kg of solid reactive acutely hazardous unwanted material, the eligible academic entity is not required to remove any unwanted materials from the laboratory within ten calendar days of exceeding 55 gallons, or 1 quart of liquid reactive acutely hazardous unwanted material or 1 kg of solid reactive acutely hazardous unwanted material, as required by Section R315-262-208. Instead, the eligible academic entity shall remove the unwanted materials from the laboratory within 30 calendar days from the start of the laboratory clean-out; and
3. (2) for on-site accumulation, an eligible academic entity is not required to count a hazardous waste that is an unused commercial chemical product, listed in Sections R315-261-30 through R315-261-35 or exhibiting one or more characteristics in Sections R315-261-20 through R315-261-24, generated solely during the laboratory clean-out toward its hazardous waste generator category, pursuant to Section R315-262-13. An unwanted material that is generated before the beginning of the laboratory clean-out and is still in the laboratory when the laboratory clean-out begins shall be counted toward hazardous waste generator category, pursuant to Section R315-262-13, if it is determined to be hazardous waste; and
4. (3) for off-site management, an eligible academic entity shall count its hazardous waste, regardless of whether the hazardous waste was counted toward generator category under Subsection R315-262-213(a)(2), and if it generates more than 1 kg per month of acute hazardous waste or more than 100 kg per month of non-acute hazardous waste, that is, the very small quantity generator limits as defined in Section R315-260-10, the hazardous waste is subject to the applicable hazardous waste rules if it is transported off site; and

5. (4) an eligible academic entity shall document the activities of the laboratory clean-out. The documentation shall, at a minimum, identify the laboratory being cleaned out, the date the laboratory clean-out begins and ends, and the volume of hazardous waste generated during the laboratory clean-out. The eligible academic entity shall maintain the records for a period of three years from the date the clean-out ends.

   1. (b) For any other laboratory clean-outs conducted during the 12-month period, an eligible academic entity is subject to the applicable requirements of Sections R315-262-200 through R315-262-216, including:
6. (1) The requirement to remove unwanted materials from the laboratory within ten calendar days of exceeding 55 gallons, or 1 quart of reactive acutely hazardous unwanted material, as required by Section R315-262-208; and
7. (2) The requirement to count each hazardous waste, including unused hazardous waste, generated during the laboratory clean-out toward its hazardous waste generator category, pursuant to Section R315-262-13.

KEY: hazardous waste, generators

Date of Last Change: November 17, 2025

Notice of Continuation: December 11, 2025

Authorizing, and Implemented or Interpreted Law: 19-6-105; 19-6-106