translate English to French: Chemical treatment can be broadly divided into two sub-categories: (1) those techniques that attempt to extract contaminants and (2) those that attempt to destroy or alter contaminants in the excavated material.
Un certain nombre de méthodes de traitement chimique permettent d’éliminer le chlore de la structure moléculaire des contaminants organiques chlorés, tels les biphényles polychlorés (BPC).