1. A. A person who generates a solid waste, as defined in COMAR 26.13.02.02:

   1. (1) Shall:

      1. (a) Make an accurate determination as to whether that waste is a hazardous waste, with an “accurate determination” being a determination that allows the person to determine the requirements that are applicable to the waste and the generator of the waste under the provisions of COMAR 26.13.01—26.13.10 and federal hazardous waste regulations; and

      2. (b) Take into account, when the determination required by §A(1)(a) of this regulation is made, changes in the properties of the waste that are known or likely to occur before the ultimate disposition of the waste due to:

         1. (i) Exposure of the waste to the environment; or
         2. (ii) Other factors;

   2. (2) Shall, in complying with §A(1) of this regulation, make the determination for each solid waste:

      1. (a) At the point of waste generation before any dilution, mixing, or other alteration of the waste occurs; and

      2. (b) At any time in the course of the management of the waste when:

         1. (i) The properties of the waste have, or may have, changed as a result of exposure of the waste to the environment or because of other factors; and
         2. (ii) The change or potential change to the properties of the waste may cause a change to the classification of the waste made under §A(2)(a) of this regulation;

   3. (3) May, subject to the requirements of §A(4) of this regulation, designate the solid waste to be a hazardous waste if the person:

      1. (a) Assumes that the solid waste is a hazardous waste without having made a formal determination following the procedures in Regulation .02-1 of this chapter; or
      2. (b) Has decided to voluntarily designate and manage the solid waste as a hazardous waste despite a determination, using the procedures in Regulation .02-1 of this chapter, that the waste does not have to be managed as a hazardous waste; and

   4. (4) Shall, if the person has made the assumption that the waste is hazardous, as specified in §A(3)(a) of this regulation:

      1. (a) Determine whether the waste is an acute hazardous waste, as specified in Regulation .02-1 of this chapter;
      2. (b) Comply with the record keeping requirements of Regulation .02-2 of this chapter, if applicable; and
      3. (c) Identify all hazardous wastes numbers that may be associated with the waste, in accordance with the requirements of §D(1) of this regulation, if applicable.

2. B. A person making the determination required by §A of this regulation shall:

   1. (1) Follow the procedures specified in Regulation .02-1 of this chapter in characterizing the waste; and
   2. (2) Unless the person qualifies as a Maryland-defined small quantity generator, comply with the record keeping requirements specified in Regulation .02-2 of this chapter.
3. C. If the result of the determination required by §A of this regulation is that the waste is a hazardous waste, the generator of the waste shall refer to COMAR 26.13.02, 26.13.05, 26.13.06, 26.13.09, and 26.13.10 for possible exclusions or restrictions pertaining to management of the specific waste.

4. D. A person who generates hazardous waste and who does not meet the criteria to be considered a Maryland-defined small quantity generator shall:

   1. (1) Identify, for each hazardous waste generated, all hazardous waste numbers and EPA hazardous waste numbers, as specified in COMAR 26.13.02.11—.19, that apply to the hazardous waste; and
   2. (2) Comply with the record keeping requirements of Regulation .02-2 of this chapter.

   Agency Note: information from the complete determination of applicable hazardous waste numbers required by §D(1) of this regulation is needed in order to comply with the container marking requirements of Regulation .03-10 of this chapter.

Authority: Environment Article, Title 7, Subtitle 2, Annotated Code of Maryland

Effective date:

Regulations .01—.07 adopted as an emergency provision effective November 18, 1980 (7:25 Md. R. S-1); adopted permanently effective April 3, 1981 (8:7 Md. R. 642)

Regulations .01; .04A, D; .05D, E; .07B amended effective January 18, 1982 (9:1 Md. R. 20)

Regulations .01B; .02B; .04A, B, D; .05E; .06A—C; and .07A amended, and .01G and .04E adopted effective July 30, 1984 (11:15 Md. R. 1330)

Regulations .01E and .05E amended effective February 13, 1984 (11:3 Md. R. 202)

Regulations .01F, .04D, .06C, and .07A amended effective January 31, 1983 (10:2 Md. R. 110)

Regulation .05E amended effective August 12, 1985 (12:16 Md. R. 1607)

Chapter recodified from COMAR 10.51.03 to COMAR 26.13.03

Regulation .01B, D amended effective August 28, 1995 (22:17 Md. R. 1321)

Regulation .01G amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .01H and I adopted effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .02A amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .04 amended effective April 18, 1988 (15:8 Md. R. 1009); September 11, 2006 (33:18 Md. R. 1507)

Regulation .04A, C amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .04A, D, E amended effective May 24, 1993 (20:10 Md. R. 853)

Regulation .05 amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .05C amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .05E amended effective April 18, 1988 (15:8 Md. R. 1009); May 24, 1993 (20:10 Md. R. 853); September 10, 1997 (24:5 Md. R. 413)

Regulation .06A amended effective May 5, 1997 (24:9 Md. R. 659)

Regulation .06B amended effective April 18, 1988 (15:8 Md. R. 1009); December 23, 1991 (18:25 Md. R. 2759); August 28, 1995 (22:17 Md. R. 1321); May 5, 1997 (24:9 Md. R. 659)

Regulation .06C amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .07A amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .07 repealed and new Regulations .07 and .07-1—.07-4 adopted effective August 28, 1995 (22:17 Md. R. 1321)

Regulation .08 repealed effective May 5, 1997 (24:9 Md. R. 659)

Chapter revised effective October 16, 2000 (27:20 Md. R. 1843)

Regulation .01B-1 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .01G amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .01J adopted effective May 1, 2008 (35:8 Md. R. 809)

Regulation .02 amended effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .04 amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .04A amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .05E amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .07 amended effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .07A amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .07-1 amended effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .07-2A amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .07-2C amended effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .07-3 amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .07-5 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Chapter revised effective May 3, 2021 (48:9 Md. R. 359)

Regulation .01A-2 amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .01D amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .01G amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .01K, L adopted effective October 1, 2025 (52:17 Md. R. 876)

Regulation .01-1B-1 adopted effective October 1, 2025 (52:17 Md. R. 876)

Regulation .02C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .03-3E amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .03-4C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .03-5C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .03-7B amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .04 amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .05F adopted effective October 1, 2025 (52:17 Md. R. 876)

Regulation .05-4C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .06B amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .06C amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .07 repealed and new Regulation .07 adopted effective January 13, 2022 (49:1 Md. R. 14)

Regulations .07-1—.07-3 repealed effective January 13, 2022 (49:1 Md. R. 14)

Regulation .07-4 amended effective January 13, 2022 (49:1 Md. R. 14)

Regulations .07-5 repealed effective January 13, 2022 (49:1 Md. R. 14)