Persistent and Bioaccumulative Toxic Substances
Organic and inorganic chemicals listed below are tested for both Waste Extraction Test (WET) solubility and total concentrations. If the results of the soluble threshold limit concentrations (STLC) or total threshold limit concentrations (TTLC) equal or exceed their respective thresholds, the waste is a toxic hazardous waste.
Check out this explanation: “Organics: To WET or not to WET?”
Organic chemicals:
Substance |
STLC |
TTLC |
Aldrin |
0.14 |
1.4 |
Chlordane |
0.25 |
2.5 |
DDT, DDE, DDD |
0.1 |
1.0 |
2,4-Dichlorophenoxyacetic acid |
10 |
100 |
Dieldren |
0.8 |
8.0 |
Dioxin (2,3,7,8-TCDD) |
0.001 |
0.01 |
Endrin |
0.02 |
0.2 |
Heptachlor |
0.47 |
4.7 |
Kepone |
2.1 |
21 |
Lead compounds, organic |
-- |
13 |
Lindane |
0.4 |
4.0 |
Methoxychlor |
10 |
100 |
Mirex |
2.1 |
21 |
Pentachlorophenol |
1.7 |
17 |
Polychlorinated biphenyls (PCBs) |
5.0 |
50 |
Toxaphene |
0.5 |
5 |
Trichloroethylene |
204 |
2,040 |
2,4,5-Trichlorophenoxypropionic acid |
1.0 |
10 |
Inorganic chemicals:
Substance |
STLC Mg/L |
TTLC Wet Weight |
Antimony and/or antimony compounds |
15 |
500 |
Arsenic and/or arsenic compounds |
5.0 |
500 |
Asbestos |
|
1.0 (as percent) |
Barium and/or barium compounds (excluding barite) |
100 |
10,000c |
Beryllium and/or beryllium compounds |
0.75 |
75 |
Cadmium and/or cadmium compounds |
1.0 |
100 |
Chromium (VI) compounds |
5 |
500 |
Chromium and/or chromium (III) compounds |
5d |
2,500 |
Cobalt and/or cobalt compounds |
80 |
8,000 |
Copper and/or copper compounds |
25 |
2,500 |
Fluoride salts |
180 |
18,000 |
Lead and/or lead compounds |
5.0 |
1,000 |
Mercury and/or mercury compounds |
0.2 |
20 |
Molybdenum and/or molybdenum compounds |
350 |
3,500e |
Nickel and/or nickel compounds |
20 |
2,000 |
Selenium and/or selenium compounds |
1.0 |
100 |
Silver and/or silver compounds |
5 |
500 |
Thallium and/or thallium compounds |
7.0 |
700 |
Vanadium and/or vanadium compounds |
24 |
2,400 |
Zinc and/or zinc compounds |
250 |
5,000 |
a STLC and TTLC values are calculated on the concentrations of the elements, not the compounds.
b In the case of asbestos and elemental metals, the specified concentration limits apply only if the substances are in a friable, powdered or finely divided state. Asbestos includes chrysotile, amosite, crocidolite, tremolite, anthophyllite, and actinolite.
c Excluding barium sulfate.
d If the soluble chromium, as determined by the TCLP set forth in Appendix I of Chapter 18 of this division, is less than 5 mg/l, and the soluble chromium, as determined by the procedures set forth in Appendix II of Chapter 11, equals or exceeds 560 mg/l and the waste is not otherwise identified as a RCRA hazardous waste pursuant to §66261.100, then the waste is a non‑RCRA hazardous waste.
e Excluding molybdenum disulfide.
Activity 5c: Persistent and Bioaccumulative
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