Regulatory Exclusions and Alternative Standards for the Recycling of Materials, Solid Wastes and Hazardous Wastes

Hazardous wastes do not cease to be dangerous simply because they are being reused, recycled, or reclaimed. Many hazardous waste recycling operations may pose serious health and environmental hazards and are subject to regulation under Subtitle C of the Resource Conservation and Recovery Act (RCRA).

Reuse, recycling, and reclamation should be viewed as ways of managing hazardous wastes which, if properly conducted, can avoid environmental hazards, protect scarce natural resources, and reduce the nation’s reliance on raw materials and energy. Promoting reuse and recovery is certainly one of the goals of RCRA; however, this goal does not take precedence over ensuring the proper management of hazardous waste.

On this page:

• Determining Applicable Levels of Regulation
• Recycled Materials that are not Subject to RCRA Hazardous Waste Regulation
• Materials Subject to Alternative Regulatory Controls When Recycled
• Materials Subject to Full Hazardous Waste Regulation When Recycled
• Resources

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Determining the Level of Regulation for Hazardous Waste Recycling

A determination about a whether or not a waste is classified as a solid waste is the crucial first step in the Hazardous Waste Identification Process. A hazardous secondary material cannot be regulated as a hazardous waste unless it is first determined to be a solid waste. When recycled, how a material is regulated under RCRA (i.e., whether or not it is a solid and potentially a hazardous waste) depends on what type of material it is and what type of recycling is occurring.

To determine which regulations apply to recycled materials, the generator should consider what the material is and the manner in which it will be recycled. To address the goal of encouraging recycling while protecting human health and the environment, EPA tailored the level of regulation to reflect the actual hazard of the recycling activity. In this approach to regulation, recycling standards range from full regulation to specialized standards to exemptions from regulation.

The generator is responsible for determining whether the recyclable secondary material is subject to reduced requirements or full regulation. Under the RCRA hazardous waste regulations, materials that are recycled may be:

• Not subject to RCRA hazardous waste regulation.
• Subject to alternative controls when recycled.
• Subject to full RCRA hazardous waste regulation.

RCRA also provides regulations to distinguish legitimate recycling practices from “sham recycling.” To learn more about this topic, read Legitimate Hazardous Waste Recycling.

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Recycled Materials that are not Subject to RCRA Hazardous Waste Regulation

In order to encourage recycling practices, certain materials are specifically excluded from the definition of solid waste, and some solid wastes are excluded from the definition of hazardous waste. Furthermore, certain hazardous wastes are exempt from regulation when recycled. These three categories are discussed below.

• Recycled Materials Specifically Excluded from the Definition of Solid Waste.
• Recycled Materials that are Solid Wastes but not Hazardous Wastes.
• Hazardous Wastes that are not Subject to Hazardous Waste Regulation when Recycled.

Recycled Materials Specifically Excluded from the Definition of Solid Waste

In order to encourage recycling, RCRA exempts three types of wastes from the definition of solid waste:

• Waste Used as an Ingredient: If a material is directly used as an ingredient in a production process without first being reclaimed, then that material is not a solid waste.
• Waste Used as a Product Substitute: If a material is directly used as an effective substitute for a commercial product (without first being reclaimed), it is exempt from the definition of solid waste.
• Wastes Returned to the Production Process: When a material is returned directly to the production process (without first being reclaimed) for use as a feedstock or raw material, it is not a solid waste.

However, as explained below, these wastes are not exempted if they are burned for energy recovery or used in a manner constituting disposal (i.e., placed in or on the land).

The following materials, when recycled, are excluded from the definition of solid waste and are therefore not subject to RCRA Subtitle C regulation:

Excluded Material(s)	Explanation of Exclusion
Hazardous Secondary Material Excluded under a Variance or Non-Waste Determination	Case-by-case determinations that recycled materials are not solid wastes. Refer to 40 CFR sections 260.30, 260.31, 260.33, and 260.34. Also, for specific examples of granted variances, refer to the August 13, 2002, partial reclamation variance for World Resources Company, and the 2023 final response to a partial reclamation variance petition from HVF Precious Metals, LLC.
Pulping Liquors	Pulping liquors (i.e., black liquor) that are reclaimed in a pulping liquor recovery furnace and then reused in the pulping process, unless it is accumulated speculatively as defined in Title 40 of the Code of Federal Regulations (CFR) section 261.1(c)(8). Refer to 40 CFR section 261.4(a)(6).
Spent Sulfuric Acid	Spent sulfuric acid used to produce virgin sulfuric acid provided it is not accumulated speculatively as defined in 40 CFR section 261.1(c)(8). Refer to 40 CFR section 261.4(a)(7).
Closed-Loop Recycling	Secondary materials that are reclaimed and returned to the original process or processes in which they were generated where they are reused in the production process provided the conditions of the exclusion are met. Refer to 40 CFR section 261.4(a)(8).
Wood Preserving Solutions	Spent wood preserving solutions and associated wastewaters that are reclaimed and reused for their original intended purpose, provided the conditions of the exclusion are met. Refer to 40 CFR section 261.4(a)(9).
Coke By-Products	Listed and characteristic coke by-products provided there is no land disposal and they are recycled to coke ovens, to the tar recovery process as a feedstock to produce coal tar, or mixed with coal tar prior to the tar's sale or refining. Refer to 40 CFR section 261.4(a)(10).
Non-wastewater Splash Condenser Dross Residue	Non-wastewater splash condenser dross residue from the treatment of electric arc furnace dust (K061) in high temperature metals recovery units, provided it is shipped in drums (if shipped) and not land disposed before recovery. Refer to 40 CFR section 261.4(a)(11).
Oil-Bearing Hazardous Secondary Materials	Oil-bearing hazardous secondary materials that are generated at a petroleum refinery and are inserted into the petroleum refining process and meet the other conditions of the exclusion. Refer to 40 CFR section 261.4(a)(12).
Excluded Scrap Metal	Excluded scrap metal (processed scrap metal, unprocessed home scrap metal, and unprocessed prompt scrap metal) being recycled. Refer to 40 CFR section 261.4(a)(13).
Shredded Circuit Boards	Shredded circuit boards being recycled provided that they are stored in containers sufficient to prevent a release to the environment prior to recovery and are free of mercury switches, mercury relays and nickel-cadmium batteries and lithium batteries. Refer to 40 CFR section 261.4(a)(14).
Condensates from Kraft Mill Steam Strippers	Condensates derived from the overhead gases from kraft mill steam strippers that are used to comply with 40 CFR section 63.446(e). The exemption applies only to combustion at the mill generating the condensates. Refer to 40 CFR section 261.4(a)(15).
Mineral Processing Spent Materials	Spent materials (as defined in 40 CFR section 261.1) (other than hazardous wastes listed in subpart D of this part) generated within the primary mineral processing industry from which minerals, acids, cyanide, water, or other values are recovered by mineral processing or by beneficiation, provided that the materials are stored in certain types of units and are not accumulated speculatively. Refer to 40 CFR section 261.4(a)(17) for all conditions that apply for this exclusion.
Petrochemical Recovered Oil	Petrochemical recovered oil from an associated organic chemical manufacturing facility, where the oil is to be inserted into the petroleum refining process (SIC code 2911) along with normal petroleum refinery process streams, provided that the oil is hazardous only because it exhibits the characteristic of ignitability (as defined in 40 CFR section 261.21) and/or toxicity for benzene (40 CFR section 261.24, waste code D018) and the oil is not placed on the land, or speculatively accumulated before being recycled into the petroleum refining process. Definitions of “associated organic chemical manufacturing facility” and “petrochemical recovered oil” are provided at 40 CFR section 261.4(a)(18).
Spent Caustic Solutions from Petroleum Refining	Spent caustic solutions from petroleum refining liquid treating processes used as a feedstock to produce cresylic or naphthenic acid unless the material is placed on the land, or accumulated speculatively as defined in 40 CFR section 261.1(c)(8). Refer to 40 CFR section 261.4(a)(19).
Hazardous Secondary Materials Used to Make Zinc Fertilizers and Zinc Fertilizers Made from Recycled Hazardous Secondary Materials	Hazardous secondary materials that are recycled to make zinc fertilizers are excluded under 40 CFR section 261.4(a)(20) and the zinc fertilizers made from hazardous secondary materials are excluded under 40 CFR section 261.4(a)(21). Refer to the respective paragraphs for all conditions that apply for these exclusions.
Used Cathode Ray Tubes (CRTs)	Used, intact or broken, cathode ray tubes (CRTs), and glass removed from CRTs, are excluded provided that the conditions listed at 40 CFR section 261.4(a)(22) are satisfied.
Hazardous Secondary Materials Generated and Reclaimed Under the Control of the Generator	Hazardous secondary materials that are generated and reclaimed under the control of the generator (defined as generated and reclaimed on-site, within the same company, or under certain tolling arrangements) are excluded under 40 CFR section 261.4(a)(23) , provided certain requirements are met.
Hazardous Secondary Materials Generated and Transferred Off-Site for Reclamation (including Exported for Reclamation)	Hazardous secondary materials that are generated and sent off-site for reclamation are excluded under 40 CFR section 261.4(a)(24) and (a)(25) (for exports) provided certain conditions are met.
Solvent-contaminated Wipes Sent for Reuse	Solvent-contaminated wipes that are sent for cleaning and reuse are excluded under 40 CFR section 261.4(a)(26) provided certain conditions are met.
Hazardous Secondary Materials Transferred Off-Site for Remanufacturing	Hazardous secondary materials that are generated and sent off-site for the purpose of remanufacturing are excluded under 40 CFR section 261.4(a)(27) provided certain conditions are met.

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Recycled Materials that are Solid Wastes but not Hazardous Wastes

The following materials, when recycled in certain ways, are excluded from the definition of hazardous waste and are therefore not subject to RCRA hazardous waste regulation:

Material(s)	Explanation of Exclusion
Agricultural Waste	Solid wastes generated by the growing and harvesting of agricultural crops or the raising of animals, including animal manures, and which are returned to the soils as fertilizers are not regulated as RCRA hazardous wastes. Refer to 40 CFR section 261.4(b)(2).
Spent Chlorofluorocarbon Refrigerants	Used chlorofluorocarbon refrigerants from totally enclosed heat transfer equipment, including mobile air conditioning systems, mobile refrigeration, and commercial and industrial air conditioning and refrigeration systems that use chlorofluorocarbons as the heat transfer fluid in a refrigeration cycle, are not hazardous wastes provided that the refrigerant is reclaimed for further use. Refer to 40 CFR section 261.4(b)(12).
Used Oil Distillation Bottoms	Used oil re-refining distillation bottoms that are used as feedstock to manufacture asphalt products are not hazardous wastes. Refer to 40 CFR section 261.4(b)(14).

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Hazardous Wastes that are not Subject to Hazardous Waste Regulation when Recycled

Even if the material is listed as a hazardous waste or meets the characteristics of a hazardous waste, there are exemptions from full hazardous waste regulation when these hazardous wastes are recycled.

Material(s)	Explanation of Exemption
Industrial Ethyl Alcohol	Industrial ethyl alcohol that is reclaimed is not subject to RCRA hazardous waste regulation when recycled, provided that the conditions at 40 CFR section 261.6(a)(3)(i), if applicable, are satisfied.
Scrap Metal	Scrap metal that is not excluded under 40 CFR section 261.4(a)(13) is not subject to RCRA hazardous waste regulation when recycled. Refer to 40 CFR section 261.6(a)(3)(ii).
Waste-Derived Fuels from Refining Processes	Fuels produced from the refining of oil-bearing hazardous waste along with normal process streams at a petroleum refining facility are not subject to RCRA hazardous waste regulation when recycled if such wastes result from normal petroleum refining, production, and transportation practices (this exemption does not apply to fuels produced from oil recovered from oil-bearing hazardous waste, where such recovered oil is already excluded under 40 CFR section 261.4(a)(12). Refer to 40 CFR section 261.6(a)(3)(iii).
Unrefined Waste-Derived Fuels and Oils from Petroleum Refineries	Hazardous waste fuel produced at a petroleum refinery from oil-bearing hazardous wastes that are introduced into the refining process after the distillation step, or that are reintroduced in a process that does not include distillation, are exempt if the resulting fuel meets the specifications under the federal recycled used oil standards in 40 CFR section 279.11. Oil that is recovered from hazardous waste at a petroleum refinery and burned as a fuel is also exempt provided it meets the used oil specifications. Refer to 40 CFR section 261.6(a)(3)(iv).

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Materials Subject to Alternative Regulatory Controls When Recycled

Several types of materials are subject to alternative management standards for collection and/or recycling. They are described in detail below:

Universal Waste

The universal waste program promotes the collection and recycling of certain widely generated hazardous wastes. At present, the universal waste regulations include batteries, pesticides, lamps (e.g., fluorescent bulbs), mercury-containing equipment (e.g., thermostats), and aerosol cans. The universal waste rule is designed to reduce hazardous waste in the municipal solid waste stream by making it easier for universal waste handlers to collect these items and send them for recycling or proper disposal. In addition, the regulations also ensure that the wastes subject to this system will go to appropriate treatment or recycling facilities pursuant to the full hazardous waste regulatory controls (refer to 40 CFR part 273).

Used Oil

Used oil includes petroleum-based or synthetic oil that has been used. Because used oil has certain unique properties that make it distinct from most hazardous waste streams and is an easily recyclable material, EPA developed special recycling regulations for used oil that are completely separate from hazardous waste recycling standards (refer to 40 CFR part 279).

Recyclable Materials Used in a Manner Constituting Disposal

Materials used in a manner that constitutes disposal are recyclable materials that are applied to or placed on the land. These materials must:

1. have undergone a chemical reaction so as to be inseparable by physical means; and
2. meet applicable land disposal restrictions treatment standards (refer to 40 CFR part 266 subpart C).

Once these waste-derived products meet these standards, they are no longer restricted from placement on the land. Materials that do not meet these criteria remain fully regulated as hazardous waste. There are also special standards for hazardous wastes used to make zinc micronutrient fertilizers. Refer to 40 CFR part 266 subpart C.

Materials Utilized for Precious Metal Recovery

Precious metals reclamation is the recycling and recovery of precious metals (i.e., gold, silver, platinum, palladium, iridium, osmium, rhodium, and ruthenium) from hazardous waste. Because these materials will be handled protectively as valuable commodities with significant economic value, generators, transporters, and storers of such recyclable materials are subject to reduced requirements (refer to 40 CFR part 266 subpart F).

Spent Lead-Acid Batteries Being Reclaimed

Persons who generate, transport, regenerate, collect, and store spent lead-acid batteries prior to reclamation, but do not perform the actual reclamation, are not subject to hazardous waste regulation. However, owners and operators of facilities that store spent batteries before reclamation, other than spent batteries that are regenerated (processed to remove contaminants and restore the product to a useable condition), are subject to regulation in a manner similar to hazardous waste treatment, storage, and disposal facilities (TSDFs) (refer to 40 CFR part 266 subpart G).

Note: Lead-acid batteries may also be managed as a Universal Waste.

Hazardous Waste Burned in Boilers and Industrial Furnaces

Hazardous secondary materials burned for energy or material recovery are regulated as hazardous waste, and the process of recycling hazardous waste by burning it may pose significant air emission hazards. Therefore, EPA established specific operating standards for units burning hazardous wastes for energy or material recovery (40 CFR part 266 subpart H). These units are referred to as hazardous waste boilers or industrial furnaces (BIFs).

Ignitable Spent Refrigerants that are Recycled for Reuse 

Ignitable spent refrigerants that are recycled for reuse are regulated under alternative RCRA recycling standards found in 40 CFR part 266 Subpart Q. Lower flammability spent refrigerants are subject to the Subpart Q alternative standards in lieu of full hazardous waste requirements. These RCRA alternative standards largely defer to existing Clean Air Act standards for refrigerant recovery equipment and reclaimer certification. They also include a prohibition on speculative accumulation and requirements for emergency preparedness and response by refrigerant reclaimers. These requirements aim to decrease emissions and support safe recycling of used refrigerants.

Read through frequent questions about the new standards.

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Materials Subject of Full Hazardous Waste Regulation When Recycled

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Resources