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Onsite wastewater management

Our expertise in wastewater treatment, soil science, environmental risk and regulations is critical when developing onsite wastewater management plans.

On-site wastewater systems, such as septic tanks and dispersal systems, are common across Australia in areas where it’s impractical or not possible for households to connect to existing sewerage systems. Due to Australia’s low population density and love of rural living, there are thousands of onsite systems servicing households and businesses.

When system failures or environmental concerns arise, we guide regulators thorough diagnostics and technical recommendations to address issues efficiently and protect public health. Additionally, we support local governments in creating maintenance programs, public education initiatives, and policies that encourage proper system care and reduce the risk of environmental contamination.

In 2024, RMCG supported EPA Victoria to develop the Guideline for onsite wastewater management.

Team

Anna Kelliher

Anna Kelliher

Principal

BA, BE (Hons), GAICD

Anna is an environmental engineer with 20 years’ experience in water and catchment management. She specialises in recycled water planning, irrigation modernisation, land capability assessment, environmental risk assessment and catchment condition reporting. Anna has experience working with industry, government, farmers and the community, and has developed sound teamwork, communication and project management skills.

Duncan Wallis

Duncan Wallis

Associate

BEng (Ag), MEng (Env), CPEng.

Duncan is a Chartered Engineer with 25 years’ experience in environmental, irrigation, agricultural, drinking water, domestic wastewater, sewerage, trade waste, recycled water and catchment management engineering in the public and private sectors.

He specialises in water related infrastructure planning and investigations and uses skills and tools such as GIS mapping, spatial data analysis and network analysis to develop practical solutions to complex problems and uses the ‘power’ of spatial data analysis to convey information effectively.

He can communicate technical concepts in non-technical forums and has experience consulting and working with farmers and landholders, government departments and wider community on route planning for pipelines and shared trails including rail trails. He has recently prepared successful EPA works approval applications for major food processing companies and expert witness statements in agricultural settings.

Duncan is currently involved in Australian Water and Wastewater’s mentor program and reviews articles for their Water Journal. He previously helped run the Institute of Engineers’ EngQuest regional program for students.

Hilary Hall

Hilary Hall

Associate

Churchill Fellow, M.Eng.Sci. (Water & Wastewater Treatment), B.Eng. (Chem.)

Hilary believes in transforming waste to regenerate our environment and nourish our communities. Through considered management and appropriate treatment, wastewater and organic by-products can be used to enhance resource recovery, improve soil health and develop local circular economies. As a process engineer with expertise in municipal and industrial wastewater treatment, Hilary’s experience includes strategic planning, concept design, regulatory approvals, contaminant investigations and environmental risk. In 2023 Hilary received a Churchill Fellowship, travelling throughout Europe to investigate biosolids regulation and use. With a background in wastewater operations, Hilary has a strong emphasis on developing strategies and management plans that are practical and site-specific.

Matt Shanahan

Matt Shanahan

Managing Principal

B.Tech. (Env.)

Matt has been working in the water/irrigation industry for the past 15 years, having spent the last 12 years with RMCG consulting to a range of private and government clients.  Matt has worked extensively in the field of recycled water and organics management, having prepared master plans, land capability assessments, irrigation management plans and environmental management plans for a range of clients.  He is also experienced in the development of works approval applications and undertaking technical assessments involving the management of soils, nutrients and salinity/sodicity.

Natasha Frazer

Natasha Frazer

Consultant

BSc (Chemical Systems)

Natasha has recently joined RMCG and has a degree and experience in Chemical Systems. She has an interest in the agri-food and environmental sectors and has theoretical and practical knowledge in process engineering, sustainability, agriculture and waste management.