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Class A

Concentration limit: ≥ 50 mg/kg

A1     Antimony and antimony compounds

A2     Arsenic and arsenic compounds

A3     Beryllium and beryllium compounds

A4     Cadmium and cadmium compounds

A5     Chromium (VI) compounds

A6     Mercury and mercury compounds

A7     Selenium and selenium compounds

A8     Tellurium and tellurium compounds

A9     Thallium and thallium compounds

A10   Inorganic cyanide compounds

A11   Metal carbonyls

A12   Napthalene

A13   Anthracene

A14   Phenanthrene

A15   Chrysene, benzo (a) anthracene, fluoranthene, benzo (a) pyrene, benzo (K) fluoranthene,

         indeno (1, 2, 3-cd) pyrene and benzo (ghi) perylene

A16   halogenated compounds of aromatic rings, e.g. polychlorinated biphenyls

A17   Halogenated aromatic compounds

A18   Benzene

A19   Organo-chlorine pesticides

A20   Organo-tin Compounds

Class B

Concentration limit: ≥ 5, 000 mg/kg

B1     Chromium (III) compounds

B2     Cobalt compounds

B3     Copper compounds

B4     Lead and lead compounds

B5     Molybdenum compounds

B6     Nickel compounds

B7     Inorganic Tin compounds

B8     Vanadium compounds

B9     Tungsten compounds

B10   Silver compounds

B11   Halogenated aliphatic compounds

B12   Organo phosphorus compounds

B13   Organic peroxides

B14   Organic nitro-and nitroso-compounds

B15   Organic azo-and azooxy compounds

B16   Nitriles

B17   Amines

B18   (Iso-and thio-) cyanates

B19   Phenol and phenolic compounds

B20   Mercaptans

B21   Asbestos

B22   Halogen-silanes

B23   Hydrazine (s)

B24   Flourine

B25   Chlorine

B26   Bromine

B27   White and red phosphorus

B28   Ferro-silicate and alloys

B29   Manganese-silicate

B30   Halogen-containing compounds which produce acidic vapours on contact with humid  air or water,

         e.g. silicon tetrachloride, aluminium chloride, titanium tetrachloride

Class C

Concentration limit; ≥  20, 000 mg/kg

C1    Ammonia and ammonium compounds

C2    Inorganic peroxides

C3    Barium compounds except barium sulphate

C4    Fluorine compounds

C5    Phosphate compounds except phosphates of aluminium, calcium and iron

C6    Bromates, (hypo-bromites)

C7    Chlorates, (hypo-chlorites)

C8    Aromatic compounds other than those listed under A12 to A18

C9   Organic silicone compounds

C10 Organic sulphur compounds

C11 Iodates

C12 Nitrates, nitrites

C13 Sulphides

C14 Zinc compounds

C15 Salts of per-acids

C16 Acid amides

C17 Acid anhydrides

Class D

Concentration limit: ≥ 50, 000 mg/kg

D1    Total Sulphur

D2    Inorganic acids

D3    Metal hydrogen sulphates

D4    Oxides and hydroxides except those of hydrogen, carbon, silicon, iron, aluminum, titanium,   manganese, magnesium, calcium

D5    Total hydrocarbons other than those listed under A12 to A18

D6    Organic oxygen compounds

D7    Organic nitrogen compounds expressed as nitrogen

D8    Nitrides

D9    Hydrides

Class E

Regardless of concentration limit; Classified as hazardous wastes at all concentrations

E1     Flammable substances

E2     Substances which generate hazardous quantities of flammable gases on contact with water or damp air


*     Waste constituents and their concentration limits given in this list are based on BAGA the Netherlands Environment Protection Agency) List of Hazardous Substances. In  order to decide whether a specific material listed above is hazardous or not, following   points be taken into consideration: 

(i)           If a component of the waste appears in one of the five risk classes listed above (A,  B, C, D or E) and the concentration of the component is equal to or more than the  limit for the relevant risks class, the material is then classified as hazardous waste.

(ii)          If a chemical compound containing a hazardous constituent is present in the waste, the concentration limit does not apply to the compound, but only to the hazardous constituent itself.

(iii)         If multiple hazardous constituents from the same class are present in the waste, the concentrations are added together.

(iv)         If multiple hazardous constituents from different classes are present in the waste, the lowest concentration limit corresponding to the constituent(s) applies.

(v)          For substances in water solution, the concentration limit for dry matter must be used. If the dry matter content is less than 0.1% by weight, the concentration limit, reduced by a factor of one thousand, applies to the solution.