On 3 March 2015, the site at Fiskville was closed indefinitely after tests on two mains water storage tanks found low level traces of perfluorooctanesulfonic acid (PFOS) from a banned firefighting foam. The chairman and chief executive of WorkSafe Victoria stood down at the request of the state government, due to concerns about the authority's handling of the contamination claims and its declaration that the site was safe. On 26 March 2015, the Victorian Government announced that the Fiskville facility would be closed permanently, after new toxicology tests revealed high levels of contamination on the site.