The aim of this study is to familiarise the reader with the Act on the Remediation of Contaminated Sites (AlSAG), which has only been given scant attention in the relevant literature, with reference to a wide variety of examples and visual illustrations. Broadly speaking, the AlSAG covers the following regulatory areas: the collection of the disused hazardous site levy, the investigation of suspect and contaminated sites and the actual remediation measures. The objective of the Act is to finance the protection and remediation of contaminated sites (§ 1). The disused hazardous site levy is collected for this purpose. The central theme of this study is therefore Section II of this Act, which is concerned with the object of taxation, the amount levied and the basis of assessment. Based on a broad definition of waste, the description is limited to three categories of waste. A case taken from the media concerning the building of a dam using construction waste materials along the river Mur serves to round off this chapter. Once again, the aim of discussing individual cases is to familiarise the reader with requirements for the payment of a disused hazardous site levy, as discussed in the study, and exemption from this levy by looking at a recent event.For the sake of completeness, the implementation of safety and remediation measures is discussed in the main sections, together with an assessment of suspect and contaminated sites. Finally, the financial penalty procedure implemented by the administrative authorities, particularly in light of the (partial) non-payment of the disused hazardous site levy, is discussed in broad terms. This section of the study is accompanied by a notional continuation of the "Mur Dam Embankment" case, which was successfully resolved.The closing remarks serve to provide a concluding critical analysis of the relevant Act.