Direct test methods for the classification of hazardous properties of wastes

SESSION A12 / 19 November 2020 / 14:45 - 16:00
Direct test methods for the classification of hazardous properties of wastes
Chair / Presidente: Alberto Pivato (IT)


Correct hazard classification of waste is crucial to provide sustainable and lawful management plans, from transport to final disposal. Especially in the case of waste classified as “mirror entry” in the European List of Waste, the choice of the specific assessment tool or method is a key step to ensure the transparency and reliability of the process.
Directive 2008/98/EC defines waste as hazardous if characterized by at least one of the 15 hazardous properties (HPs).
The assessment of the specific HP can be based on the measured content of potentially hazardous substances or on the result of a test of a given property. Here, a tiered assessment is recommended:

  • 1st tier: Waste should be classified according to the European List of Waste (LoW) as “hazardous”, “non-hazardous”, or as “mirror entry”. In this latter case:
  • 2nd tier: Some HPs can be assessed as through the so-called expert judgment;
  • 3rd tier: The remaining HP can be assessed according to the total concentration of specific waste constituents under a “worst realistic case” hypothesis.
  • 4th tier: If the “worst realistic case” approach leads to unsatisfactory or unrealistic results, a 4th tier can be performed by carrying out direct analytical methods, specifically developed for the target HP.

In this context, the session will discuss the current drawbacks and challenges posed by the current direct test procedures implemented in the 4th tier. In particular, the following Hazard Properties will be debated, being identified as the most discriminating or controversial ones: HP 4 Irritant; HP 8 Corrosive; HP 10 Toxic for reproduction; HP 14 ecotoxic.


  • P. Hennebert (FR)
    Waste hazard properties HP 4 ‘Irritant’ And Hp 8 ‘Corrosive’ By Ph And Acid / Base Buffer Capacity

  • L. Maggi (IT)
    HP4 and HP8 classification of waste: state of the art of testing and later challenges in the Italian scenario (provisional title)

  • S. Giardina (IT)
    Testing protocols for HP10 Classification of waste: the Italian experience (provisional title)

  • P. Grenni (IT)
    Ecotoxicological testing for HP14 Classification of Waste: state of the art and current challenges