Removal of the tank is the preferred option for dealing with disused or unwanted UPSS as it allows for a more thorough investigation and assessment of any contamination remaining at the site. Tank removal and remediation of any residual contamination decreases environmental and OH&S risks at UPSS sites, which reduces the liability of the person responsible for the site and/or its owner while increasing potential future land-use options.
However, depending on the site, it may be impractical or undesirable to remove some UPSS, such as those located in the basement of a building or where removal will have an impact on other structures. In these situations, the disused UPSS should be emptied and decommissioned in situ by filling the tank with a concrete slurry, sand or foam.
All decommissioning, abandonment or removal works must be carried out by a ‘duly qualified person’ as defined in the UPSS Regulation.
Source: State of NSW and Department of Environment, Climate Change and Water NSW UPSS Technical Note:Decommissioning, Abandonment and Removal of UPSSISBN 978 1 74232 518 7 DECCW 2010/36 January 2010
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