R315-261-32. Lists of Hazardous Wastes - Hazardous Wastes from Specific Sources  


Latest version.
  •   (a) The following solid wastes are listed hazardous wastes from specific sources unless they are excluded under Sections R315-260-20 and 22 and listed in appendix IX.


    TABLE


    Industry

    and EPA

    hazardous

    waste No. Hazardous waste Hazard

                                                            code

    Wood

    preservation:

    K001 Bottom sediment sludge from the treatment of (T)

                wastewaters from wood preserving processes

                that use creosote and/or pentachlorophenol


    Inorganic

    pigments:

    K002 Wastewater treatment sludge from the (T)

                 production of chrome yellow and orange

                 pigments


    K003 Wastewater treatment sludge from the (T)

                 production of molybdate orange pigments


    K004 Wastewater treatment sludge from the (T)

                 production of zinc yellow pigments


    K005 Wastewater treatment sludge from the (T)

                 production of chrome green pigments


    K006 Wastewater treatment sludge from the (T)

                 production of chrome oxide green pigments,

                 anhydrous and hydrated,


    K007 Wastewater treatment sludge from the (T)

                 production of iron blue pigments


    K008 Oven residue from the production of chrome (T)

                 oxide green pigments


    Organic

    chemicals:

    K009 Distillation bottoms from the production of (T)

                 acetaldehyde from ethylene


    K010 Distillation side cuts from the production (T)

                 of acetaldehyde from ethylene


    K011 Bottom stream from the wastewater (R,T)

                 stripper in the production of acrylonitrile


    K013 Bottom stream from the acetonitrile (R,T)

                 column in the production of acrylonitrile


    K014 Bottoms from the acetonitrile purification (T)

                 column in the production of acrylonitrile


    K015 Still bottoms from the distillation of (T)

                 benzyl chloride


    K016 Heavy ends or distillation residues (T)

                 from the production of carbon tetrachloride


    K017 Heavy ends (still bottoms) from the (T)

                 purification column in the production of

                 epichlorohydrin


    K018 Heavy ends from the fractionation column in (T)

                 ethyl chloride production


    K019 Heavy ends from the distillation of (T)

                 ethylene dichloride in ethylene dichloride

                 production


    K020 Heavy ends from the distillation of vinyl (T)

                 chloride in vinyl chloride monomer production


    K021 Aqueous spent antimony catalyst waste from (T)

                 fluoromethanes production


    K022 Distillation bottom tars from the (T)

                 production of phenol/acetone from cumene


    K023 Distillation light ends from the production (T)

                 of phthalic anhydride from naphthalene


    K024 Distillation bottoms from the production of (T)

                 phthalic anhydride from naphthalene


    K025 Distillation bottoms from the production of (T)

                 nitrobenzene by the nitration of benzene


    K026 Stripping still tails from the (T)

                 production of methy ethyl pyridines


    K027 Centrifuge and distillation residues (R,T)

                 from toluene diisocyanate production


    K028 Spent catalyst from the hydrochlorinator (T)

                 reactor in the production of

                 1,1,1-trichloroethane


    K029 Waste from the product steam stripper in (T)

                 the production of 1,1,1-trichloroethane


    K030 Column bottoms or heavy ends from the (T)

                 combined production of trichloroethylene and

                 perchloroethylene


    K083 Distillation bottoms from aniline (T)

                 production


    K085 Distillation or fractionation column (T)

                 bottoms from the production of chlorobenzenes


    K093 Distillation light ends from the production (T)

                 of phthalic anhydride from ortho-xylene

    K094 Distillation bottoms from the production of (T)

                 phthalic anhydride from ortho-xylene


    K095 Distillation bottoms from the production of (T)

                 1,1,1-trichloroethane


    K096 Heavy ends from the heavy ends column from (T)

                 the production of 1,1,1-trichloroethane


    K103 Process residues from aniline extraction (T)

                 from the production of aniline

    K104 Combined wastewater streams generated from (T)

                 nitrobenzene/aniline production


    K105 Separated aqueous stream from the reactor (T)

                 product washing step in the production of

                 chlorobenzenes


    K107 Column bottoms from product separation (C,T)

                 from the production of

                 1,1-dimethylhydrazine (UDMH) from

                 carboxylic acid hydrazides


    K108 Condensed column overheads from product (I,T)

                 separation and condensed reactor vent gases

                 from the production of 1,1-dimethylhydrazine

                 (UDMH) from carboxylic acid hydrazides


    K109 Spent filter cartridges from product (T)

                 purification from the production of

                 1,1-dimethylhydrazine (UDMH) from carboxylic

                 acid hydrazides


    K110 Condensed column overheads from (T)

                 intermediate separation from the production

                 of 1,1-dimethylhydrazine (UDMH) from

                 arboxylic acid hydrazides


    K111 Product washwaters from the production (C,T)

                 of dinitrotoluene via nitration of

                 toluene


    K112 Reaction by-product water from the drying (T)

                 column in the production of toluenediamine

                 via hydrogenation of dinitrotoluene


    K113 Condensed liquid light ends from the (T)

                 purification of toluenediamine in the

                 production of toluenediamine via hydrogenation

                 of dinitrotoluene


    K114 Vicinals from the purification of (T)

                 toluenediamine in the production of

                 toluenediamine via hydrogenation of

                 dinitrotoluene


    K115 Heavy ends from the purification of (T)

                 toluenediamine in the production of

                 toluenediamine via hydrogenation of

                 dinitrotoluene


    K116 Organic condensate from the solvent (T)

                 recovery column in the production of toluene

                 diisocyanate via phosgenation of

                 toluenediamine


    K117 Wastewater from the reactor vent gas (T)

                 scrubber in the production of ethylene

                 dibromide via bromination of ethane

    K118 Spent adsorbent solids from purification of (T)

                 ethylene dibromide in the production of

                 ethylene dibromide via bromination of ethane


    K136 Still bottoms from the purification of (T)

                 ethylene dibromide in the production of

                 ethylene dibromide via bromination of ethane


    K149 Distillation bottoms from the production of (T)

                 alpha-, or methyl-, chlorinated toluenes,

                 ring-chlorinated toluenes, benzoyl chlorides,

                 and compounds with mixtures of these

                 functional groups, This waste does not include

                 still bottoms from the distillation of benzyl

                 chloride.


    K150 Organic residuals, excluding spent carbon (T)

                 adsorbent, from the spent chlorine gas and

                 hydrochloric acid recovery processes

                 associated with the production of alpha-, or

                 methyl-, chlorinated toluenes,

                 ring-chlorinated toluenes, benzoyl chlorides,

                 and compounds with mixtures of these

                 functional groups


    K151 Wastewater treatment sludges, excluding (T)

                 neutralization and biological sludges,

                 generated during the treatment of wastewaters

                 from the production of alpha-, or methyl-,

                 chlorinated toluenes, ring-chlorinated

                 toluenes, benzoyl chlorides, and compounds

                 with mixtures of these functional groups


    K156 Organic waste, including heavy ends, still (T)

                 bottoms, light ends, spent solvents,

                 filtrates, and decantates, from the

                 production of carbamates and carbamoyl oximes.

                 This listing does not apply to wastes

                 generated from the manufacture of

                 3-iodo-2-propynyl n-butylcarbamate.


    K157 Wastewaters, including scrubber waters, (T)

                 condenser waters, washwaters, and separation

                 waters, from the production of carbamates

                 and carbamoyl oximes. This listing does not

                 apply to wastes generated from the

                 manufacture of 3-iodo-2-propynyl

                 n-butylcarbamate.


    K158 Bag house dusts and filter/separation (T)

                 solids from the production of carbamates and

                 carbamoyl oximes. This listing does not apply

                 to wastes generated from the manufacture of

                 3-iodo-2-propynyl n-butylcarbamate.

    K159 Organics from the treatment of (T)

                 thiocarbamate wastes


    K161 Purification solids; including (R,T)

                 filtration, evaporation, and centrifugation

                 solids; bag house dust and floor sweepings

                 from the production of dithiocarbamate acids

                 and their salts. This listing does not

                 include K125 or K126.


    K174 Wastewater treatment sludges from the (T)

                 production of ethylene dichloride or vinyl

                 chloride monomer, including sludges that

                 result from commingled ethylene dichloride

                 or vinyl chloride monomer wastewater and other

                 wastewater, unless the sludges meet the

                 following conditions: (i) they are disposed

                 of in a subtitle C or non-hazardous landfill

                 licensed or permitted by the state or federal

                 government; (ii) they are not otherwise

                 placed on the land prior to final disposal;

                 and (iii) the generator maintains

                 documentation demonstrating that the waste

                 was either disposed of in an on-site landfill

                 or consigned to a transporter or disposal

                 facility that provided a written commitment to

                 dispose of the waste in an off-site landfill.

                 Respondents in any action brought to enforce

                 the requirements of subtitle C shall, upon a

                 showing by the government that the respondent

                 managed wastewater treatment sludges from the

                 production of vinyl chloride monomer or

                 ethylene dichloride, demonstrate that they

                 meet the terms of the exclusion set forth

                 above. In doing so, they shall provide

                 appropriate documentation, e.g., contracts

                 between the generator and the landfill

                 owner/operator, invoices documenting delivery

                 of waste to landfill, etc., that the terms of

                 the exclusion were met


    K175 Wastewater treatment sludges from the (T)

                 production of vinyl chloride monomer using

                 mercuric chloride catalyst in an

                 acetylene-based process

    K181 Nonwastewaters from the production of dyes (T)

                 and/or pigments, including nonwastewaters

                 commingled at the point of generation with

                 nonwastewaters from other processes, that,

                 at the point of generation, contain mass

                 loadings of any of the constituents

                 identified in Subsection R315-261-32(c)

                 that are equal to or greater than the

                 corresponding Subsection R315-261-32(c)

                 levels, as determined on a calendar year

                 basis. These wastes will not be hazardous

                 if the nonwastewaters are:

                 (i) disposed in a Class I or V lined

                 landfill,

                 (ii) disposed in a hazardous waste

                 landfill unit subject to either Section

                 R315-264-301 or 40 CFR 265.301,

                 which is adopted by reference,

                 (iii) disposed in other landfill units

                 that are Class I or V lined landfills

                 regulated under Rules R315-301 through

                 320 or meet the design criteria in

                 Sections R315-264-301, or 40 CFR 265.301,

                 which is adopted by reference, or

                 (iv) treated in a combustion unit that is

                 permitted under Rules R315-260 through 270,

                 or an onsite combustion unit that is

                 permitted under the Clean Air Act. For the

                 purposes of this listing, dyes and/or

                 pigments production is defined in Subsection

                 R315-261-32(b)(1). Section R315-261-32(d)

                 describes the process for demonstrating that

                 a facility's nonwastewaters are not K181.

                 This listing does not apply to wastes that

                 are otherwise identified as hazardous under

                 Sections R315-261-21 through 24 and

                 R315-261-31 through 33 at the point of

                 generation. Also, the listing does not apply

                 to wastes generated before any annual mass

                 loading limit is met


    Inorganic

    chemicals:

    K071 Brine purification muds from the mercury (T)

                 cell process in chlorine production, where

                 separately prepurified brine is not used


    K073 Chlorinated hydrocarbon waste from the (T)

                 purification step of the diaphragm cell

                 process using graphite anodes in chlorine

                 production


    K106 Wastewater treatment sludge from the (T)

                 mercury cell process in chlorine production


    K176 Baghouse filters from the production of (E)

                 antimony oxide, including filters from the

                 production of intermediates, e.g., antimony

                 metal or crude antimony oxide


    K177 Slag from the production of antimony oxide (T)

                 that is speculatively accumulated or

                 disposed, including slag from the

                 production of intermediates, e.g.,

                 antimony metal or crude antimony oxide


    K178 Residues from manufacturing and (T)

                 manufacturing-site storage of ferric

                 chloride from acids formed during the

                 production of titanium dioxide using the

                 chloride-ilmenite process


    Pesticides:

    K031 By-product salts generated in the (T)

                 production of MSMA and cacodylic acid

    K032 Wastewater treatment sludge from the (T)

                 production of chlordane


    K033 Wastewater and scrub water from the (T)

                 chlorination of cyclopentadiene in the

                 production of chlordane


    K034 Filter solids from the filtration of (T)

                 hexachlorocyclopentadiene in the

                 production of chlordane


    K035 Wastewater treatment sludges generated (T)

                 in the production of creosote


    K036 Still bottoms from toluene reclamation (T)

                 distillation in the production of

                 disulfoton


    K037 Wastewater treatment sludges from the (T)

                 production of disulfoton


    K038 Wastewater from the washing and stripping (T)

                 of phorate production


    K039 Filter cake from the filtration of (T)

                 diethylphosphorodithioic acid in the

                 production of phorate


    K040 Wastewater treatment sludge from the (T)

                 production of phorate


    K041 Wastewater treatment sludge from the (T)

                 production of toxaphene


    K042 Heavy ends or distillation residues from (T)

                 the distillation of tetrachlorobenzene in

                 the production of 2,4,5-T

    K043 2,6-Dichlorophenol waste from the (T)

                 production of 2,4-D


    K097 Vacuum stripper discharge from the (T)

                 chlordane chlorinator in the production

                 of chlordane


    K098 Untreated process wastewater from the (T)

                 production of toxaphene


    K099 Untreated wastewater from the production (T)

                 of 2,4-D


    K123 Process wastewater (including supernates, (T)

                 filtrates, and washwaters) from the

                 production of ethylenebisdithiocarbamic

                 acid and its salt


    K124 Reactor vent scrubber water from the (C,T)

                 production of ethylenebisdithiocarbamic

                 acid and its salts


    K125 Filtration, evaporation, and (T)

                 centrifugation solids from the production

                 of ethylenebisdithiocarbamic acid and its

                 salts


    K126 Baghouse dust and floor sweepings in (T)

                 milling and packaging operations from the

                 production or formulation of

                 ethylenebisdithiocarbamic acid and its

                 salts


    K131 Wastewater from the reactor and spent (C,T)

                 sulfuric acid from the acid dryer from

                 the production of methyl bromide


    K132 Spent absorbent and wastewater separator (T)

                 solids from the production of methyl

                 bromide


    Explosives:

    K044 Wastewater treatment sludges from the (R)

                 manufacturing and processing of explosives


    K045 Spent carbon from the treatment of (R)

                 wastewater containing explosives


    K046 Wastewater treatment sludges from the (T)

                 manufacturing, formulation and loading of

                 lead-based initiating compounds


    K047 Pink/red water from TNT operations (R)


    Petroleum

    refining:

    K048 Dissolved air flotation (DAF) float from (T)

                 the petroleum refining industry


    K049 Slop oil emulsion solids from the (T)

                 petroleum refining industry


    K050 Heat exchanger bundle cleaning sludge from (T)

                 the petroleum refining industry


    K051 API separator sludge from the petroleum (T)

                 refining industry


    K052 Tank bottoms, leaded, from the petroleum (T)

                 refining industry


    K169 Crude oil storage tank sediment from (T)

                 petroleum refining operations


    K170 Clarified slurry oil tank sediment and/or (T)

                 in-line filter/separation solids from

                 petroleum refining operations


    K171 Spent Hydrotreating catalyst from (I,T)

                 petroleum refining operations, including

                 guard beds used to desulfurize feeds to

                 other catalytic reactors, this listing

                 does not include inert support media


    K172 Spent Hydrorefining catalyst from (I,T)

                 petroleum refining operations, including

                 guard beds used to desulfurize feeds to

                 other catalytic reactors, this listing

                 does not include inert support media


    Iron and

    steel:

    K061 Emission control dust/sludge from the (T)

                 primary production of steel in electric

                 furnaces


    K062 Spent pickle liquor generated by steel (C,T)

                 finishing operations of facilities

                 within the iron and steel industry,

                 SIC Codes 331 and 332


    Primary

    aluminum:

    K088 Spent potliners from primary aluminum (T)

                 reduction


    Secondary

    lead:

    K069 Emission control dust/sludge from (T)

                 secondary lead smelting. Note: This

                 listing is stayed administratively for

                 sludge generated from secondary acid

                 scrubber systems. The stay will remain in

                 effect until further administrative action

                 is taken. If EPA takes further action

                 effecting this stay, EPA will publish a

                 notice of the action in the Federal

                 Register


    K100 Waste leaching solution from acid (T)

                 leaching of emission control dust/sludge

                 from secondary lead smelting


    Veterinary

    pharmaceuticals:

    K084 Wastewater treatment sludges generated (T)

                 during the production of veterinary

                 pharmaceuticals from arsenic or

                 organo-arsenic compounds


    K101 Distillation tar residues from the (T)

                 distillation of aniline-based compounds

                 in the production of veterinary

                 pharmaceuticals from arsenic or

                 organo-arsenic compounds


    K102 Residue from the use of activated carbon (T)

                 for decolorization in the production of

                 veterinary pharmaceuticals from arsenic or

                 organo-arsenic compounds


    Ink

    formulation:

    K086 Solvent washes and sludges, caustic washes (T)

                 and sludges, or water washes and sludges

                 from cleaning tubs and equipment used in

                 the formulation of ink from pigments,

                 driers, soaps, and stabilizers containing

                 chromium and lead


    Coking:

    K060 Ammonia still lime sludge from coking (T)

                 operations


    K087 Decanter tank tar sludge from coking (T)

                 operations


    K141 Process residues from the recovery of coal (T)

                 tar, including, but not limited to,

                 collecting sump residues from the

                 production of coke from coal or the

                 recovery of coke by-products produced from

                 coal. This listing does not include K087,

                 decanter tank tar sludges from coking

                 operations


    K142 Tar storage tank residues from the (T)

                 production of coke from coal or from the

                 recovery of coke by-products produced from

                 coal


    K143 Process residues from the recovery of (T)

                 light oil, including, but not limited to,

                 those generated in stills, decanters, and

                 wash oil recovery units from the recovery

                 of coke by-products produced from coal


    K144 Wastewater sump residues from light oil (T)

                 refining, including, but not limited to,

                 intercepting or contamination sump sludges

                 from the recovery of coke by-products

                 produced from coal


    K145 Residues from naphthalene collection and (T)

                 recovery operations from the recovery of

                 coke by-products produced from coal


    K147 Tar storage tank residues from coal tar (T)

                 refining


    K148 Residues from coal tar distillation, (T)

                 including but not limited to, still bottoms


      (b) Listing Specific Definitions:

      (1) For the purposes of the K181 listing, dyes and/or pigments production is defined to include manufacture of the following product classes: dyes, pigments, or FDA certified colors that are classified as azo, triarylmethane, perylene or anthraquinone classes. Azo products include azo, monoazo, diazo, triazo, polyazo, azoic, benzidine, and pyrazolone products. Triarylmethane products include both triarylmethane and triphenylmethane products. Wastes that are not generated at a dyes and/or pigments manufacturing site, such as wastes from the offsite use, formulation, and packaging of dyes and/or pigments, are not included in the K181 listing.

      (c) K181 Listing Levels. Nonwastewaters containing constituents in amounts equal to or exceeding the following levels during any calendar year are subject to the K181 listing, unless the conditions in the K181 listing are met.


    TABLE


    Constituent Chemical Mass levels

                                abstracts No. (kg/yr)


    Aniline 62-53-3 9,300

    o-Anisidine 90-04-0 110

    4-Chloroaniline 106-47-8 4,800

    p-Cresidine 120-71-8 660

    2,4-Dimethylaniline 95-68-1 100

    1,2-Phenylenediamine 95-54-5 710

    1,3-Phenylenediamine 108-45-2 1,200


      (d) Procedures for demonstrating that dyes and/or pigment nonwastewaters are not K181. The procedures described in Subsections R315-261-32(d)(1) through(d)(3) and (d)(5) establish when nonwastewaters from the production of dyes/pigments would not be hazardous, these procedures apply to wastes that are not disposed in landfill units or treated in combustion units as specified in Subsection R315-261-32(a). If the nonwastewaters are disposed in landfill units or treated in combustion units as described in Subsection R315-261-32(a), then the nonwastewaters are not hazardous. In order to demonstrate that it is meeting the landfill disposal or combustion conditions contained in the K181 listing description, the generator shall maintain documentation as described in Subsection R315-261-32(d)(4).

      (1) Determination based on no K181 constituents. Generators that have knowledge; e.g., knowledge of constituents in wastes based on prior sampling and analysis data and/or information about raw materials used, production processes used, and reaction and degradation products formed; that their wastes contain none of the K181 constituents, see Subsection R315-261-32(c), can use their knowledge to determine that their waste is not K181. The generator shall document the basis for all such determinations on an annual basis and keep each annual documentation for three years.

      (2) Determination for generated quantities of 1,000 MT/yr or less for wastes that contain K181 constituents. If the total annual quantity of dyes and/or pigment nonwastewaters generated is 1,000 metric tons or less, the generator can use knowledge of the wastes; e.g., knowledge of constituents in wastes based on prior analytical data and/or information about raw materials used, production processes used, and reaction and degradation products formed; to conclude that annual mass loadings for the K181 constituents are below the listing levels of Subsection R315-261-32(c). To make this determination, the generator shall:

      (i) Each year document the basis for determining that the annual quantity of nonwastewaters expected to be generated will be less than 1,000 metric tons.

      (ii) Track the actual quantity of nonwastewaters generated from January 1 through December 31 of each year. If, at any time within the year, the actual waste quantity exceeds 1,000 metric tons, the generator shall comply with the requirements of Subsection R315-261-32(d)(3) for the remainder of the year.

      (iii) Keep a running total of the K181 constituent mass loadings over the course of the calendar year.

      (iv) Keep the following records on site for the three most recent calendar years in which the hazardous waste determinations are made:

      (A) The quantity of dyes and/or pigment nonwastewaters generated.

      (B) The relevant process information used.

      (C) The calculations performed to determine annual total mass loadings for each K181 constituent in the nonwastewaters during the year.

      (3) Determination for generated quantities greater than 1,000 MT/yr for wastes that contain K181 constituents. If the total annual quantity of dyes and/or pigment nonwastewaters generated is greater than 1,000 metric tons, the generator shall perform all of the steps described in Subsections R315-261-32(d)(3)(i) through (d)(3)(xi) in order to make a determination that its waste is not K181.

      (i) Determine which K181 constituents, see Subsection R315-261-32(c), are reasonably expected to be present in the wastes based on knowledge of the wastes; e.g., based on prior sampling and analysis data and/or information about raw materials used, production processes used, and reaction and degradation products formed.

      (ii) If 1,2-phenylenediamine is present in the wastes, the generator can use either knowledge or sampling and analysis procedures to determine the level of this constituent in the wastes. For determinations based on use of knowledge, the generator shall comply with the procedures for using knowledge described in Subsection R315-261-32(d)(2) and keep the records described in Subsection R315-261-32(d)(2)(iv). For determinations based on sampling and analysis, the generator shall comply with the sampling and analysis and recordkeeping requirements described in Subsections R315-261-32(d)(3)(iii) through (xi).

      (iii) Develop a waste sampling and analysis plan, or modify an existing plan, to collect and analyze representative waste samples for the K181 constituents reasonably expected to be present in the wastes. At a minimum, the plan shall include:

      (A) A discussion of the number of samples needed to characterize the wastes fully;

      (B) The planned sample collection method to obtain representative waste samples;

      (C) A discussion of how the sampling plan accounts for potential temporal and spatial variability of the wastes.

      (D) A detailed description of the test methods to be used, including sample preparation, clean up, if necessary, and determinative methods.

      (iv) Collect and analyze samples in accordance with the waste sampling and analysis plan.

      (A) The sampling and analysis shall be unbiased, precise, and representative of the wastes.

      (B) The analytical measurements shall be sufficiently sensitive, accurate and precise to support any claim that the constituent mass loadings are below the listing levels of Subsection R315-261-32(c).

      (v) Record the analytical results.

      (vi) Record the waste quantity represented by the sampling and analysis results.

      (vii) Calculate constituent-specific mass loadings, product of concentrations and waste quantity.

      (viii) Keep a running total of the K181 constituent mass loadings over the course of the calendar year.

      (ix) Determine whether the mass of any of the K181 constituents listed in Subsection R315-261-32(c) generated between January 1 and December 31 of any year is below the K181 listing levels.

      (x) Keep the following records on site for the three most recent calendar years in which the hazardous waste determinations are made:

      (A) The sampling and analysis plan.

      (B) The sampling and analysis results, including QA/QC data.

      (C) The quantity of dyes and/or pigment nonwastewaters generated.

      (D) The calculations performed to determine annual mass loadings.

      (xi) Nonhazardous waste determinations shall be conducted annually to verify that the wastes remain nonhazardous.

      (A) The annual testing requirements are suspended after three consecutive successful annual demonstrations that the wastes are nonhazardous. The generator can then use knowledge of the wastes to support subsequent annual determinations.

      (B) The annual testing requirements are reinstated if the manufacturing or waste treatment processes generating the wastes are significantly altered, resulting in an increase of the potential for the wastes to exceed the listing levels.

      (C) If the annual testing requirements are suspended, the generator shall keep records of the process knowledge information used to support a nonhazardous determination. If testing is reinstated, a description of the process change shall be retained.

      (4) Recordkeeping for the landfill disposal and combustion exemptions. For the purposes of meeting the landfill disposal and combustion condition set out in the K181 listing description, the generator shall maintain on site for three years documentation demonstrating that each shipment of waste was received by a landfill unit that is subject to or meets the landfill design standards set out in the listing description, or was treated in combustion units as specified in the listing description.

      (5) Waste holding and handling. During the interim period, from the point of generation to completion of the hazardous waste determination, the generator is responsible for storing the wastes appropriately. If the wastes are determined to be hazardous and the generator has not complied with the hazardous waste requirements during the interim period, the generator could be subject to an enforcement action for improper management.