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Appendix C: Toxicity Guidelines

The toxicity guidelines in Table C1 have been derived on the basis of ADI values for the substances listed. In accordance with section 4.2.1, the substances that have an ADI of &#8804 0.02 mg/kg/day or are carcinogenic are high-concern contaminants. Substances with an ADI between 0.02 and 0.2 mg/kg/day are medium-concern contaminants, and substances with an ADI greater than 0.2 mg/kg/day are low-concern contaminants.

Table C1: Examples of contaminants with high, medium and low concern for human health - soil ingestion

High-concern contaminants Medium-concern contaminants Low-concern contaminants

Aldrin

Boron

Chromium III

Arsenic

Cobalt

Iron

Benzene

Copper

Zinc

Benzo(a)pyrene

Fluoride

 

Chlordane

Formaldehyde

 

Chromium VI

Glyphosate (Roundup)

 

Cyanide and compounds

Methanol

 

DDT

Permethrin

 

Diazinon

Phenol

 

Dieldrin

Styrene

 

2,4-Dichlorophenoxyacetic Acid (2,4-D)

Tin and compounds

 

Dioxin

   

Endrin

   

Ethylbenzene

   

Lead

   

Lindane

   

Malathion

   

Mercury

   

Naphthalene

   

Nickel

   

Pentachlorophenol

   

Polychlorinated biphenyls (PCBs)

   

Tetrachloroethane

   

Tetrachloroethylene (PCE)

   

Trichloroethylene (TCE)

   

Toluene

   

Vinyl chloride

   

Xylenes