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HWIR May 16, 2001 Final Rule Background Documents
Below are select background documents in support of the HWIR 2001 Final Rule. Please see the index to final rule docket for a complete list.You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
- U.S. EPA 2001. Hazardous Waste Identification Rule: Revisions to the
Mixture and Derived-From Rules Response to Comments Document. April
2001.
- Chapter 1 (PDF) (41 pp, 803K)
- Chapter 2 (PDF) (47 pp, 627K)
- Chapter 3 (PDF) (29 pp, 410K)
- Chapter 4 (PDF) (4 pp, 229K)
- Chapter 5 (PDF) (29 pp, 340K)
- Chapter 6 (PDF) (21 pp, 282K)
- Chapter
7 (PDF) (36 pp, 446K)
- U.S. EPA 2001. Appendices A-G. Hazardous Waste Identification Rule:
Revisions to the Mixture and Derived-From Rules Response to Comments
Document. April 2001.
- Appendix A (PDF) (132 pp, 301K)
- Appendix B (PDF) (62 pp, 128K)
- Appendix C (PDF) (66 pp, 154K)
- Appendix D (PDF) (80 pp, 181K)
- Appendix E (PDF) (34 pp, 74K)
- Appendix F (PDF) (50 pp, 87K)
- Appendix
G (PDF) (40 pp, 69K)
- U.S. EPA 2001. Comment Summary and Response Document: HWIR Mixed Waste-Related Comments, April 2001 (PDF) (65 pp, 1.0MB)
- U.S. EPA 2001 Analysis of RCRA Hazardous "Mixture and Derived-from" Waste Data, April 2001 (PDF) (97 pp, 1.2MBK)
- U.S. EPA 2001. Economic Assessment of the U.S. EPA's 2001 Final Rule Revising the Mixture and Derived-From Rules, April 2001 (PDF) (26 pp, 244K)
- U.S. EPA 2000. Evaluation of Hazardous Waste Delisting Program, December 2000 (PDF) (1 pg, 143K)
- U.S. EPA 2000. Screening Level Analysis of Health-Based Numbers for Chemicals in Wastes Listed Solely for Ignitability, Corrosivity, and/or Reactivity. Note to Docket from David Cozzie, November 2000 (PDF) (4 pp, 16K)
- U.S. EPA 2000. Screening Level Analysis of Health-Based Numbers for Chemicals in Wastes Listed by Ignitability attachment to the above reference (PDF) (1 pg, 12K)
- U.S. EPA 2000. Releases of Hazardous Constituents Associated with Mixture and Derived-from Wastes (An Update), April 2000 (PDF) (18 pp, 410K)
HWIR November 19, 1999 Proposed Rule Background
This site provides information and data that supported the development of the Hazardous Waste Identification Rule (HWIR) proposal (PDF) (80 pp, 683 K). As background, the EPA proposed to amend its regulations governing solid wastes that are designated as hazardous, because they have been mixed with, or derived from listed hazardous wastes.
Specifically, under this action, the Agency is proposed to retain and amend the mixture rule and the derived-from rule in the Resource Conservation and Recovery Act (RCRA). The mixture and derived-from rules ensure that hazardous wastes that are mixed with other wastes or that result from the treatment, storage or disposal, do not escape regulation and thereby cause harm to human health and the environment. Listed in 40 CFR 261.3(a)(2)(iii), 261.3(a)(2)(iv) and 261.3(c)(2)(i), these rules are currently in effect on an emergency basis.
EPA also proposed two revisions to the mixture and derived-from rules. These revisions would narrow their scope, tailoring the rules to more specifically match the risks posed by particular wastes. The first is an exemption for mixtures and/or derivatives of wastes listed solely for the ignitability, corrosivity, and/or reactivity characteristics. The second is a conditional exemption from the mixture and derived-from rules for "mixed wastes," (that is, wastes that are both hazardous and radioactive).
This proposal also discussed an implementation framework for an exemption from hazardous waste management for wastes that meet chemical-specific exemption levels ("the HWIR exemption"). Exemption levels are expected to be based on a risk assessment model designed to evaluate simultaneous exposures across multiple media and pathways in order to estimate the resulting health and environmental effects.
Finally, this proposal also discussed the possibility of revising the Land Disposal Restrictions (LDRs) by replacing technology-based treatment standards, in the RCRA regulations, with risk-based treatment standards