Gap Ridge Processing Facility

About Gap Ridge Processing Facility

To enable ongoing success, we continually invest in purpose built equipment and technology that drives safety, efficiency and productivity for our clients.

Specialised Hazardous Waste Facility

Our Gap Ridge Processing Facility was developed as part of our commitment to developing solutions to challenges faced by the oil and gas industry.

This facility offers a local solution to processing hazardous waste by-products and eliminates risks from other disposal options including prolonged hazardous goods storage and complex international transportation and disposal.

Our technology is environmentally friendly and allows for maximum resource recovery, resulting in reduced waste volumes to landfill. All mercury waste processing units are operated under negative pressure and utilise specialist off-gas scrubbing technology to ensure all process by-products are captured and reused as a fuel source for the facility where possible.

Commissioned in July 2018, we continue to process mercury contaminated waste generated within the LNG industry.

Waste Streams Processed

  • Mercury impacted catalyst & media
  • Contaminated filters & personal protective equipment (PPE)
  • Contaminated sands & sludge
  • Oily water
  • Acids & alkalines


Contaminated waste generated during exploration and production can contain hazardous substances that require storage at approved licensed storage facilities. Our facility is licenced to store the following contaminated waste products:

  • NORMs in various forms
  • Hydrocarbons
  • Spent catalyst & media
  • Mercury impacted waste
  • Contaminated process equipment and piping


Our facility utilises the Pilbara climate to its advantage by depositing wastewater in large evaporation ponds. This allows water to evaporate through solar radiation and wind, leaving a pond of concentrated residual waste that can be re-processed through the onsite facility.

The evaporation ponds can take:

  • 12,000 m3 of waste product
  • Sludges or waters containing <1000ppm (0.1%) hydrocarbon
  • Neutralised acids and bases (between 5-9pH)


The High Temperature Treatment Unit (HTTU) is a continuous process designed for the treatment of catalysts and activated carbon that is contaminated with Mercury, Mercury sulphides (HgS), Sulphur, and hydrocarbons.


The Thermal Desorption Unit (TDU) is designed for the treatment of sludge that is contaminated with hydrocarbons and Mercury. This process can also be used as a pre-treatment of hydrocarbon contaminated catalysts, which can then be further treated by the HTTU.

Our technology is environmentally friendly and
allows for maximum resource recovery, resulting
in reduced waste volumes to landfill.


The Mercury Purification Unit is a high vacuum distillation process designed to purify up to 250kg/day of Mercury to at least 99.999% purity to meet the 5N clinical grade specifications. This allows the final product to be recycled and utilised in other industries reducing the environmental impact of operations.


The Waste Water Treatment Plant (WWTP) can process various types of waste water generated by heavy industry. This process runs on a pre-filtration sediment catcher before moving on to micro and nano filtration. The WWTP has a capacity to treat 36 m³ of liquid per day with the final product meeting the acceptance criteria for evaporation ponds located on the facility.

Need a change?


Learn more