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EPA Toxic Characteristic Hazardous Waste

Maximum Concentration of Contaminants for the Toxicity Characteristic

EPA HW No. 1 Contaminant CAS No. 2 Regulatory Level (mg/L)
D004 Arsenic 7440-38-2 5.0
D005 Barium 7440-39-3 100.0
D018 Benzene 71-43-2 0.5
D006 Cadmium 7440-43-9 1.0
D019 Carbon tetrachloride 56-23-5 0.5
D020 Chlordane 57-74-9 0.03
D021 Chlorobenzene 108-90-7 100.0
D022 Chloroform 67-66-3 6.0
D007 Chromium 7440-47-3 5.0
D023 o-Cresol 95-48-7 4200.0
D024 m-Cresol 108-39-4 4200.0
D025 p-Cresol 106-44-5 4200.0
D026 Cresol -- 4200.0
D016 2,4-D 94-75-7 10.0
D027 1,4-Dichlorobenzene 106-46-7 7.5
D028 1,2-Dichloroethane 107-06-2 0.5
D029 1,1-Dichloroethylene 75-35-4 0.7
D030 2,4-Dinitrotoluene 121-14-2 30.13
D012 Endrin 72-20-8 0.02
D031 Heptachlor (and its epoxide) 76-44-8 0.008
D032 Hexachlorobenzene 118-74-1 30.13
D033 Hexachlorobutadiene 87-68-3 0.5
D034 Hexachloroethane 67-72-1 3.0
D008 Lead 7439-92-1 5.0
D013 Lindane 58-89-9 0.4
D009 Mercury 7439-97-6 0.2
D014 Methoxychlor 72-43-5 10.0
D035 Methyl ethyl ketone 78-93-3 200.0
D036 Nitrobenzene 98-95-3 2.0
D037 Pentrachlorophenol 87-86-5 100.0
D038 Pyridine 110-86-1 35.0
D010 Selenium 7782-49-2 1.0
D011 Silver 7440-22-4 5.0
D039 Tetrachloroethylene 127-18-4 0.7
D015 Toxaphene 8001-35-2 0.5
D040 Trichloroethylene 79-01-6 0.5
D041 2,4,5-Trichlorophenol 95-95-4 400.0
D042 2,4,6-Trichlorophenol 88-06-2 2.0
D017 2,4,5-TP (Silvex) 93-72-1 1.0
D043 Vinyl chloride 75-01-4 0.2

1Hazardous waste number.
2Chemical abstracts service number.
3Quantitation limit is greater than the calculated regulatory level. The quantitation limit therefore becomes the regulatory level.
4If 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.

[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]

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