1. (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, see Section R315-260-11, 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 1. 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 Section R315-261-24.

2. (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.

   TABLE 1

   Maximum Concentration of Contaminants for the

   Toxicity Characteristic

   PA HW(1) Contaminant CAS(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 95-48-7 200.0(4)

   D024 m-Cresol 108-39-4 200.0(4)

   D025 p-Cresol 106-44-5 200.0(4)

   D026 Cresol 200.0(4)

   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 0.13(3)

   D012 Endrin 72-20-8 0.02

   D031 Heptachlor

   (and its epoxide) 76-44-8 0.008

   D032

   Hexachlorobenzene 118-74-1 0.13(3)

   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 5.0(3)

   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

   D04

   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

3. (1) Hazardous waste number.
4. (2) Chemical abstracts service number.

5. (3) Quantitation limit is greater than the calculated

   regulatory level. The quantitation limit therefore becomes

   the regulatory level.

6. (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.

KEY: hazardous waste

Date of Last Change: November 17, 2025

Notice of Continuation: December 11, 2025

Authorizing, and Implemented or Interpreted Law: 19-6-105; 19-6-106