1. (1) Unless otherwise authorized by the department, Class B and Class C waste must be disposed of in separate disposal units from those containing Class A waste. The department may authorize the disposal of Class A waste with Class B and C waste if the Class A meets the stability requirements of section 382.81(b) of this Title.
2. (2) The permittee must maintain a computer-based tracking system for the waste packages at the land disposal facility. The tracking system must be indexed on the unique identification number assigned to the waste package as required by section 383-8.4(c)(6) of this Subpart and must record the movement and location of each waste package from the time it is accepted for disposal through its final placement in the disposal unit. The tracking system must record the position of each waste package within the disposal unit.
3. (3) Waste must be protected from the elements, including wind, rain, snow, ice, and flooding during disposal operations.
4. (4) The permittee must operate the land disposal facility in a manner that will minimize the amount of time that elapses between the receipt and disposal of waste. Unless otherwise authorized by the department, waste that is accepted for disposal must be emplaced in disposal units no later than 90 days after it was received at the land disposal facility.

5. (5) The total quantity of special nuclear material present on the disposal site outside of the disposal units must not, at any time, be sufficient to form a critical mass. Special nuclear material in quantities not sufficient to form a critical mass means:

   1. (i) uranium enriched in the isotope uranium-235 in quantities not exceeding 350 grams of contained uranium-235;
   2. (ii) uranium-233 in quantities not exceeding 200 grams;
   3. (iii) plutonium in quantities not exceeding 200 grams; or
   4. (iv) any combination of uranium-233, plutonium, or uranium enriched in uranium-235 that meets this criterion: For each type of special nuclear material present, the ratio between the amount of that special nuclear material present and the limit for that special nuclear material set in subparagraphs (i) through (iii) of this paragraph must be calculated. The sum of those ratios must not exceed one.
6. (6) Disposal units that have been filled to their design capacity must be closed as required by section 383-9.3 of this Part. Unless otherwise approved by the department, all disposal unit closure measures must be completed no later than one year after the disposal unit is filled.
7. (7) Ongoing disposal operations must not have an adverse impact on closed disposal units.
8. (8) Waste generated from on-site activities must be disposed of in accordance with the requirements of this Part.
9. (9) Waste must not be placed in disposal units unless it meets the requirements of section 383-8.4(c)(1) and (2) of this Subpart.

10. (10) No waste may be placed in a new disposal unit until:

    1. (i) the department receives from the permittee the construction certification report for the new disposal unit as required by section 383-7.2(f) of this Part; and
    2. (ii) the department inspects the new disposal unit, finds it to be in conformance with the permit, and so notifies the permittee in writing.
11. (11) Waste must be placed in the disposal unit in a manner that maintains the waste package integrity during emplacement, minimizes the void spaces between packages, permits the void spaces to be filled, and is consistent with the facility's design goals for recovery or retrieval of waste, if applicable.

12. (12) Void spaces between waste packages must be filled with free-draining material to reduce subsidence of the disposal unit after disposal unit closure.

    (b) Disposal of mixed waste.

13. (1) The disposal of mixed waste must comply with Part 373 of this Title and with this Part.
14. (2) Only mixed waste and filler material authorized by the department, if any, may be disposed of in disposal units designed and constructed for mixed waste.
15. (3) Mixed waste must be placed in disposal units that are located a sufficient distance from disposal units that are used for other types of wastes so that the monitoring, operation, closure and post-closure requirements for hazardous waste disposal facilities in this Part and Part 373 of this Title are met.

(a) General disposal requirements.