Technical Guidance 40: Weathered Petroleum Hydrocarbons (Silica Gel Clean-up)

Mar 30, 2026

This technical report has been prepared to review the available information on the presence of polar metabolite compounds in samples collected from weathered petroleum hydrocarbon–impacted soil and groundwater. The aim is to identify an appropriate silica gel clean up...

Technical Guidance 46: The role of natural source zone depletion in the management of light non-aqueous phase liquid contaminated sites

Mar 30, 2026

This report discusses a growing body of research showing that NSZD is ubiquitous at LNAPL sites. NSZD processes occur at all LNAPL sites to some degree and understanding, quantifying and evaluating their effectiveness is therefore an important part of a sustainable...

Technical Guidance 47: Australian case studies of light non-aqueous phase liquid (LNAPL) natural source zone depletion rates compared with conventional active recovery efforts

Mar 30, 2026

Natural rates of mass loss and biodegradation of light non-aqueous phase liquid (LNAPL) fuels and oils in soil and groundwater is termed natural source zone depletion (NSZD).

Technical Guidance 24: Analytical methods for priority and emerging contaminants – a literature review

Mar 30, 2026

The availability of analytical methodology with sufficient detection sensitivity and selectivity is crucial to effective management of environmental contaminants.

Technical Guidance 26: Phosphorus management in soils using coal combustion products

Mar 30, 2026

Large quantities of coal combustion products (CCPs) are being generated worldwide annually and dumped in large piles as landfills.