FORRESTFIELD–AIRPORT LINK — SOIL
CONTAMINATION
1152. Hon Dr STEVE THOMAS to the Leader of the House
representing the Minister for Transport:
That previous answer was almost
given with a straight face, President.
I refer to question without notice
1083 asked on 14 October 2020 and question without notice 182 asked on 27 May 2021.
(1) As at 14 November 2022, what is the current volume
of spoil extracted from the Forrestfield–Airport Link project
and stockpiled at 777 Abernethy Road, Forrestfield?
(2) Has any of the 110 000 cubic metres of spoil
stockpiled at Perth Airport now been re-used; and, if so, where?
(3) How long can
the government store FAL spoil on temporary sites before it is considered a waste?
(4) How much of
the stockpiled soil from the FAL is contaminated with perfluoroalkyl and
polyfluoroalkyl substances, and at what concentrations?
(5) What
contamination oversight and testing regime has the government applied to
monitor stockpiled spoil from the FAL project?
Hon
STEPHEN DAWSON replied:
I thank the honourable member for
some notice of the question. I provide this answer on behalf of the Leader of the
House, who provides it on behalf of the Minister for Transport.
(1) It is approximately 600 000
cubic metres of soil.
(2) Perth Airport owns this soil and
is responsible for its use.
(3) The material is not considered
waste.
(4) The most
commonly detected PFAS compound in the Forrestfield–Airport Link
project's excess fill is perfluorooctane sulfonate, of which the
highest concentration measured has been 0.007 milligrams per kilogram. This is
below the human health and ecological assessment criteria in the PFAS
national environmental management plan.
(5) The soil
being re-used meets the strictest health standards in the PFAS NEMP.
Soil testing is undertaken in accordance with a suite of project-specific
environmental management plans that have been endorsed by a contaminated sites
auditor accredited by the Department of Water and Environmental Regulation.