{"data":{"id":"us/40-cfr-appendix-i-to-part-264","jurisdiction":"us","citation":"40 CFR Appendix I to Part 264","heading":"Appendix I to Part 264—Recordkeeping Instructions","body":"The recordkeeping provisions of § 264.73 specify that an owner or operator must keep a written operating record at his facility. This appendix provides additional instructions for keeping portions of the operating record. See § 264.73(b) for additional recordkeeping requirements.\nThe following information must be recorded, as it becomes available, and maintained in the operating record until closure of the facility in the following manner:\nRecords of each hazardous waste received, treated, stored, or disposed of at the facility which include the following:\n(1) A description by its common name and the EPA Hazardous Waste Number(s) from part 261 of this chapter which apply to the waste. The waste description also must include the waste's physical form, i.e., liquid, sludge, solid, or contained gas. If the waste is not listed in part 261, subpart D, of this chapter, the description also must include the process that produced it (for example, solid filter cake from production of ----, EPA Hazardous Waste Number W051).\nEach hazardous waste listed in part 261, subpart D, of this chapter, and each hazardous waste characteristic defined in part 261, subpart C, of this chapter, has a four-digit EPA Hazardous Waste Number assigned to it. This number must be used for recordkeeping and reporting purposes. Where a hazardous waste contains more than one listed hazardous waste, or where more than one hazardous waste characteristic applies to the waste, the waste description must include all applicable EPA Hazardous Waste Numbers.\n(2) The estimated or manifest-reported weight, or volume and density, where applicable, in one of the units of measure specified in Table 1;\nTable 1\nUnit of measure Code 1\nGallons G\nGallons per Hour E\nGallons per Day U\nLiters L\nLiters per Hour H\nLiters per Day V\nShort Tons per Hour D\nMetric Tons per Hour W\nShort Tons per Day N\nMetric Tons per Day S\nPounds per Hour J\nKilograms per Hour R\nCubic Yards Y\nCubic Meters C\nAcres B\nAcre-feet A\nHectares Q\nHectare-meter F\nBtu's per Hour I\nPounds P\nShort tons T\nKilograms K\nTons M\n1 Single digit symbols are used here for data processing purposes.\n(3) The method(s) (by handling code(s) as specified in Table 2) and date(s) of treatment, storage, or disposal.\nTable 2—Handling Codes for Treatment, Storage and Disposal Methods\nEnter the handling code(s) listed below that most closely represents the technique(s) used at the facility to treat, store or dispose of each quantity of hazardous waste received.\n1. Storage\nS01 Container (barrel, drum, etc.)\nS02 Tank\nS03 Waste Pile\nS04 Surface Impoundment\nS05 Drip Pad\nS06 Containment Building (Storage)\nS99 Other Storage (specify)\n2. Treatment\n(a) Thermal Treatment—\nT06 Liquid injection incinerator\nT07 Rotary kiln incinerator\nT08 Fluidized bed incinerator\nT09 Multiple hearth incinerator\nT10 Infrared furnace incinerator\nT11 Molten salt destructor\nT12 Pyrolysis\nT13 Wet air oxidation\nT14 Calcination\nT15 Microwave discharge\nT18 Other (specify)\n(b) Chemical Treatment—\nT19 Absorption mound\nT20 Absorption field\nT21 Chemical fixation\nT22 Chemical oxidation\nT23 Chemical precipitation\nT24 Chemical reduction\nT25 Chlorination\nT26 Chlorinolysis\nT27 Cyanide destruction\nT28 Degradation\nT29 Detoxification\nT30 Ion exchange\nT31 Neutralization\nT32 Ozonation\nT33 Photolysis\nT34 Other (specify)\n(c) Physical Treatment—\n(1) Separation of components:\nT35 Centrifugation\nT36 Clarification\nT37 Coagulation\nT38 Decanting\nT39 Encapsulation\nT40 Filtration\nT41 Flocculation\nT42 Flotation\nT43 Foaming\nT44 Sedimentation\nT45 Thickening\nT46 Ultrafiltration\nT47 Other (specify)\n(2) Removal of Specific Components:\nT48 Absorption-molecular sieve\nT49 Activated carbon\nT50 Blending\nT51 Catalysis\nT52 Crystallization\nT53 Dialysis\nT54 Distillation\nT55 Electrodialysis\nT56 Electrolysis\nT57 Evaporation\nT58 High gradient magnetic separation\nT59 Leaching\nT60 Liquid ion exchange\nT61 Liquid-liquid extraction\nT62 Reverse osmosis\nT63 Solvent recovery\nT64 Stripping\nT65 Sand filter\nT66 Other (specify)\n(d) Biological Treatment\nT67 Activated sludge\nT68 Aerobic lagoon\nT69 Aerobic tank\nT70 Anaerobic tank\nT71 Composting\nT72 Septic tank\nT73 Spray irrigation\nT74 Thickening filter\nT75 Trickling filter\nT76 Waste stabilization pond\nT77 Other (specify)\nT78-T79 [Reserved]\n(e) Boilers and Industrial Furnaces\nT80 Boiler\nT81 Cement Kiln\nT82 Lime Kiln\nT83 Aggregate Kiln\nT84 Phosphate Kiln\nT85 Coke Oven\nT86 Blast Furnace\nT87 Smelting, Melting, or Refining Furnace\nT88 Titanium Dioxide Chloride Process Oxidation Reactor\nT89 Methane Reforming Furnace\nT90 Pulping Liquor Recovery Furnace\nT91 Combustion Device Used in the Recovery of Sulfur Values from Spent Sulfuric Acid\nT92 Halogen Acid Furnaces\nT93 Other Industrial Furnaces Listed in 40 CFR 260.10 (specify)\n(f) Other Treatment\nT94 Containment Building (Treatment)\n3. Disposal\nD79 Underground Injection\nD80 Landfill\nD81 Land Treatment\nD82 Ocean Disposal\nD83 Surface Impoundment (to be closed as a landfill)\nD99 Other Disposal (specify)\n4. Miscellaneous (Subpart X)\nX01 Open Burning/Open Detonation\nX02 Mechanical Processing\nX03 Thermal Unit\nX04 Geologic Repository\nX99 Other Subpart X (specify)","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 264—STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"450b92743090da6c5005956292a103db5f3f4749d0d078491ed736b02f0ae9b6","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-264.1316","next":"us/40-cfr-appendixes-ii-iii-to-part-264"},"notice":"GroundRules: Original legal text. Not legal advice."}