Position paper of the Ad hoc Subcommittee “Natural Attenuation” of the Contaminated Site Committee (ALA) of the Federal/State Working Group on Soil Protection (LABO), translation by order of the Federal Environment Agency. Upon the proposal submitted by its Standing Committee 5 (Contaminated Sites Committee – ALA) the Federal / State Working Group on Soil Protection (LABO) employed an ad hoc subcommittee dealing with considering natural attenuation in remediating contaminated sites and preparing an inter-State position paper.