PURPOSE: This rule sets forth characteristics and lists by which a generator can determine whether their waste is hazardous. This rule defines hazardous waste under section 260.475, RSMo. The federal regulations in 40 CFR part 261 are incorporated by reference, subject to the modifications set forth in this rule.

PUBLISHER’S NOTE: The secretary of state has determined that publication of the entire text of the material that is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

Editor’s Note: Pursuant to American Mining Wastes v. the U.S. EPA, cited as 907 F2d 1179 (D.C. Cir. 1990), the following waste streams are not incorporated by reference in this rule: K064, K065, K066, K090, and K091. These waste streams were remanded to the Environmental Protection Agency (EPA) by the United States Court of Appeals until the EPA provides adequate justification to the court for the listing of the wastes as hazardous. Suspension of these wastes from the state rule was effective February 28, 1991.

1. (1) The regulations set forth in 40 CFR part 261, July 1, 2024, as published by the Office of the Federal Register, National Archives and Records Administration, Superintendent of Documents, Pittsburgh, PA 15250-7954, are incorporated by reference. This rule does not incorporate any subsequent amendments or additions. Except as provided otherwise in this rule, the substitution of terms set forth in 10 CSR 25-3.260(1)(A) applies in this rule in addition to any other modifications set forth in section (2) of this rule. Where conflicting rules exist in 10 CSR 25, the more stringent rules control, but in no circumstance shall the more stringent rule violate the statutory requirements set forth in 260.373, RSMo.

2. (2) This section sets forth specific modifications of the regulations incorporated in section (1) of this rule. A person subject to identifying a hazardous waste shall comply with this section as it modifies 40 CFR part 261 as incorporated in this rule. (Comment: This section has been organized in order that all Missouri additions, changes, or deletions to any subpart of the federal regulation are noted within the corresponding subsection of this section. For example, changes to 40 CFR part 261 subpart A will be located in subsection (2)(A) of this rule.)

   1. (A) General. The following are changes to 40 CFR part 261 subpart A incorporated in this rule:

      1. 1. Purpose and scope. (Reserved);
      2. 2. Definition of solid waste. (Reserved);
      3. 3. Definition of hazardous waste. (Reserved);
      4. 4. Exclusions. (Reserved);
      5. 5. (Reserved);
      6. 6. Requirements for recyclable materials. (Reserved);
      7. 7. Residues of hazardous waste in empty containers.

(Reserved);

1. 8. Polychlorinated biphenyls wastes regulated under Toxic

Substance Control Act. (Reserved);

1. 9. Requirements for universal waste. (Reserved);
2. 10. The substitution of terms in 10 CSR 25-3.260(1)(A) does

not apply in 40 CFR 261.6(a)(3)(i), as incorporated in this rule. The state may not assume authority from the Environmental Protection Agency to receive notifications of intent to export or to transmit this information to other countries through the Department of State or to transmit Acknowledgments of Consent to the exporter. This modification does not relieve the regulated person of the responsibility to comply with the Resource Conservation and Recovery Act or other pertinent export control laws and regulations issued by other agencies;

1. 11. (Reserved);
2. 12. (Reserved);
3. 13. (Reserved);
4. 14. (Reserved); and
5. 15. In accordance with section 260.432.5(2), RSMo, used

cathode ray tubes may not be placed in a sanitary landfill, except as permitted by section 260.380.3, RSMo.

1. (B) Criteria for Identifying the Characteristics of Hazardous Waste and for Listing Hazardous Wastes. (Reserved)
2. (C) Characteristics of Hazardous Waste. (Reserved)
3. (D) Lists of Hazardous Wastes. (Reserved)

4. (E) Exclusions/Exemptions.

   1. 1. The substitution of the director of the Department of

Natural Resources for the regional administrator discussed in 10 CSR 25-3.260(1)A.1. does not apply to the requirement for notification of the export of used cathode ray tubes established in 40 CFR 261.41.

1. (F) (Reserved)
2. (G) (Reserved)
3. (H) Financial Requirements for Management of Excluded Hazardous Secondary Materials. (Reserved)
4. (I) Use and Management of Containers. (Reserved)
5. (J) Tank Systems. (Reserved)
6. (K) (Reserved)
7. (L) (Reserved)
8. (M) Emergency Preparedness and Response for Management of Excluded Hazardous Secondary Materials. (Reserved)
9. (N) (Reserved)
10. (O) (Reserved)
11. (P) (Reserved)
12. (Q) (Reserved)
13. (R) (Reserved)
14. (S) (Reserved)
15. (T) (Reserved)
16. (U) (Reserved)
17. (V) (Reserved)
18. (W) (Reserved)
19. (X) (Reserved)
20. (Y) (Reserved)
21. (Z) (Reserved)
22. (AA) Air Emission Standards for Process Vents. (Reserved)
23. (BB) Air Emission Standards for Equipment Leaks. (Reserved)
24. (CC) Air Emission Standards for Tanks and Containers. (Reserved)

1. (3) Appendixes.

   1. (A) Appendix I to Part 261 Representative Sampling Methods. (Reserved)
   2. (B) Appendixes II-III to Part 261. (Reserved)
   3. (C) Appendix IV to Part 261. (Reserved)
   4. (D) Appendix V to Part 261. (Reserved)
   5. (E) Appendix VI to Part 261. (Reserved)
   6. (F) Appendix VII to Part 261 Basis for Listing Hazardous Waste. (Reserved)
   7. (G) Appendix VIII to Part 261 Hazardous Constituents. (Reserved)
   8. (H) Appendix IX to Part 261 Wastes Excluded Under Sections 260.20 and 260.22. (Reserved)

AUTHORITY: section 260.370, RSMo 2016.* Original rule filed Dec. 16, 1985, effective Oct. 1, 1986. Amended: Filed Feb. 3, 1987, effective Aug. 1, 1987. Amended: Filed Dec. 1, 1987, effective Aug. 12, 1988. Amended: Filed Feb. 16, 1990, effective Dec. 31, 1990. Amended: Filed Jan. 15, 1991, effective Oct. 1, 1991. Amended: Filed Feb. 14, 1992, effective Dec. 3, 1992. Amended: Filed Aug. 14, 1992, effective May 6, 1993. Amended: Filed Jan. 5, 1993, effective Aug. 9, 1993. Amended: Filed June 3, 1993, effective Jan. 31, 1994. Amended: Filed Jan. 5, 1994, effective Aug. 28, 1994. Amended: Filed Aug. 16, 1995, effective April 30, 1996. Amended: Filed March 22, 1996, effective Nov. 30, 1996. Amended: Filed June 1, 1998, effective Jan. 30, 1999. Amended: Filed Feb. 1, 2001, effective Oct. 30, 2001. Amended: Filed March 31, 2006, effective Dec. 30, 2006. Amended: Filed Oct. 15, 2008, effective June 30, 2009. Amended: Filed April 15, 2011, effective Dec. 30, 2011. Amended: Filed April 15, 2015, effective Dec. 30, 2015. Amended: Filed June 14, 2018, effective March 30, 2019. Amended: Filed July 10, 2024, effective Feb. 28, 2025.

*Original authority: 260.370, RSMo 1977, amended 1980, 1988, 1993, 1995, 2004, 2010.