A proposal to reinstate a liquid waste facility at Tims Thicket, Dawesville, has the Bouvard Coast Care Group mobilising an ongoing campaign to reject the City of Mandurah's plan.
Chair Mel Horton said the group was completely focused on halting the re-introduction of any liquid waste facility into the old Tim's Thicket site, which last operated in 2014.
Ms Horton said the site, which is only 1.5 metres above sea level and 3.5m above the water table, has been leaching contaminated waste well above the lower trigger level from 2006 to 2017 and no remediation has been done.
"The site is surrounded by endangered species of both flora and fauna which have already been contaminated once," Ms Horton said.
"We want to mobilise our community to reject this proposal and we will provide an online template to submit - please educate yourselves by getting the information from our website and join us in putting this facility behind us once and for all."
Dawesville MP Zak Kirkup has promised to take the matter to the State's Environment minister.
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Mr Kirkup said he supported the Bouvard Coast Care Group's push to engage the wider community.
"This is our democracy in action," Mr Kirkup said.
"The community has significant, legitimate concerns about this issue and I urge Dawesville residents to make their voices heard through the channels available. \
"Bouvard Coast Care Group is making a concerted effort to lead the process through education and accessibility, and I commend their efforts.
"I have committed to raising this issue with the Minister for the Environment to ensure all processes and community engagement protocols are followed."
Bouvard Coast Care Group expect the Department of Water, Environment and Resources to open the public consultation period soon and say they are ready to engage.
A City of Mandurah spokesperson said it was expected that a report would be considered by the council in December.
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"The project involved a long process of approvals and community engagement...and as yet the council is yet to consider the proposal. It is expected that following the next phase of the engagement and approvals the report will go to the council for consideration in December.
"The aim of this upgrade is to provide a sustainable cost effective solution for the treatment of liquid waste whilst ensuring our environment has a seat at the table and the council is clearly prepared to listen to all stakeholders on this proposal".
Ms Horton urged residents to register their details to be notified when the Department of Water, Environment and Resources submission period opens at bouvardcoastcare.org.au/register.