40 C.F.R. § 261.24 Toxicity characteristic.
Title 40 - Protection of Environment
(a) A solid waste (except manufactured gas plant waste) exhibits the characteristic of toxicity if, using the Toxicity Characteristic Leaching Procedure, test Method 1311 in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW–846, as incorporated by reference in §260.11 of this chapter, the extract from a representative sample of the waste contains any of the contaminants listed in table 1 at the concentration equal to or greater than the respective value given in that table. Where the waste contains less than 0.5 percent filterable solids, the waste itself, after filtering using the methodology outlined in Method 1311, is considered to be the extract for the purpose of this section. (b) A solid waste that exhibits the characteristic of toxicity has the EPA Hazardous Waste Number specified in Table 1 which corresponds to the toxic contaminant causing it to be hazardous. [55 FR 11862, Mar. 29, 1990, as amended at 55 FR 22684, June 1, 1990; 55 FR 26987, June 29, 1990; 58 FR 46049, Aug. 31, 1993; 67 FR 11254, Mar. 13, 2002; 71 FR 40259, July 14, 2006]
Title 40: Protection of Environment
PART 261—IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
Subpart C—Characteristics of Hazardous Waste
§ 261.24 Toxicity characteristic.
Table 1_Maximum Concentration of Contaminants for the Toxicity Characteristic------------------------------------------------------------------------ Regulatory EPA HW No. \1\ Contaminant CAS No. \2\ Level (mg/ L)------------------------------------------------------------------------D004 Arsenic................... 7440-38-2 5.0D005 Barium.................... 7440-39-3 100.0D018 Benzene................... 71-43-2 0.5D006 Cadmium................... 7440-43-9 1.0D019 Carbon tetrachloride...... 56-23-5 0.5D020 Chlordane................. 57-74-9 0.03D021 Chlorobenzene............. 108-90-7 100.0D022 Chloroform................ 67-66-3 6.0D007 Chromium.................. 7440-47-3 5.0D023 o-Cresol.................. 95-48-7 \4\ 200.0D024 m-Cresol.................. 108-39-4 \4\ 200.0D025 p-Cresol.................. 106-44-5 \4\ 200.0D026 Cresol.................... ........... \4\ 200.0D016 2,4-D..................... 94-75-7 10.0D027 1,4-Dichlorobenzene....... 106-46-7 7.5D028 1,2-Dichloroethane........ 107-06-2 0.5D029 1,1-Dichloroethylene...... 75-35-4 0.7D030 2,4-Dinitrotoluene........ 121-14-2 \3\ 0.13D012 Endrin.................... 72-20-8 0.02D031 Heptachlor (and its 76-44-8 0.008 epoxide).D032 Hexachlorobenzene......... 118-74-1 \3\ 0.13D033 Hexachlorobutadiene....... 87-68-3 0.5D034 Hexachloroethane.......... 67-72-1 3.0D008 Lead...................... 7439-92-1 5.0D013 Lindane................... 58-89-9 0.4D009 Mercury................... 7439-97-6 0.2D014 Methoxychlor.............. 72-43-5 10.0D035 Methyl ethyl ketone....... 78-93-3 200.0D036 Nitrobenzene.............. 98-95-3 2.0D037 Pentrachlorophenol........ 87-86-5 100.0D038 Pyridine.................. 110-86-1 \3\ 5.0D010 Selenium.................. 7782-49-2 1.0D011 Silver.................... 7440-22-4 5.0D039 Tetrachloroethylene....... 127-18-4 0.7D015 Toxaphene................. 8001-35-2 0.5D040 Trichloroethylene......... 79-01-6 0.5D041 2,4,5-Trichlorophenol..... 95-95-4 400.0D042 2,4,6-Trichlorophenol..... 88-06-2 2.0D017 2,4,5-TP (Silvex)......... 93-72-1 1.0D043 Vinyl chloride............ 75-01-4 0.2------------------------------------------------------------------------\1\ Hazardous waste number.\2\ Chemical abstracts service number.\3\ Quantitation limit is greater than the calculated regulatory level. The quantitation limit therefore becomes the regulatory level.\4\ If o-, m-, and p-Cresol concentrations cannot be differentiated, the total cresol (D026) concentration is used. The regulatory level of total cresol is 200 mg/l.