Washington State University
Environmental Health & Safety Hazardous Materials / Wastes

Chemical Toxicity Characteristics List

(WAC 173-303-090(8)(c))
Any waste containing one or more contaminants with concentrations at or above the Dangerous Waste (DW) threshold shall be designated DW.
Maximum Concentration of Contaminants for the Toxicity Characteristic

DW NumberContaminantDW (mg/L)
D004Arsenic5
D005Barium100
D018Benzene0.5
D006Cadmium1
D019Carbon tetrachloride0.5
D020Chlordane0.03
D021Chlorobenzene100
D022Chloroform6
D007Chromium5
D023o-Cresol 1200
D024m-Cresol 1200
D025p-Cresol 1200
D026Cresol 1200
D0162,4-D10
D0271,4-Dichloroethane7.5
D0281,2-Dichloroethane0.5
D0291,1-Dichloroethylene0.7
D0302,4-Dinitrotoluene 20.13
D012Endrin0.02
D031Heptachlor (and its epoxide)0.008
D032Hexachlorobenzene0.13
D033Hexachlorobutadiene0.5
D034Hexachloroethane3
D008Lead5
D013Lindane0.4
D009Mercury0.2
D014Methoxychlor10
D035Methyl ethyl ketone200
D036Nitrobenzene2
D037Pentachlorophenol100
D038Pyridine5
D010Selenium1
D011Silver5
D039Tetrachloroethylene0.7
D015Toxaphene0.5
D040Trichloroethylene0.5
D0412,4,5-Trichlorphenol400
D0422,4,6-Trichlorphenol2
D0172,4,5-TP (Silvex)1
D043Vinyl chloride0.2

1 If o-, m-, and p-Cresol concentrations cannot be differentiated, the total cresol (D026) concentration is used. The DW level for total cresol is 200 mg/L.
2 Quantitation limit is greater than the calculated regulatory level. The quantitation limit therefore becomes the regulatory level.