Geochemical Assessment & Waste Classification

Effective geochemical characterization is essential for predicting environmental impacts, managing waste materials, and ensuring long-term environmental compliance. NRN Environmental Consulting provides comprehensive geochemical assessment services designed to identify, evaluate, and manage geochemical risks associated with mining, industrial, and waste-generating operations.

Our team has extensive experience evaluating a wide range of materials, including tailings storage facilities (TSF), waste rock dumps (WRD), overburden, mineral residues, coal, and industrial waste streams. Using internationally recognised methodologies and South African regulatory requirements, we assess the potential of these materials to generate contaminants such as acid mine drainage (AMD), neutral mine drainage (NMD), saline drainage (SD), metal leaching, and other forms of geochemical pollution.

We Assist Clients In:

  • Characterizing waste materials and identifying contamination sources
  • Predicting short- and long-term geochemical behaviour
  • Developing preventive and mitigation strategies to reduce environmental risk
  • Ensuring alignment with best-practice standards (GARD Guide)

Our assessments help clients design environmentally responsible waste management strategies, minimise regulatory liabilities, and protect groundwater and surface water resources.

Our Geochemical Assessment Services Include:

  • Acid-Base Accounting (ABA) Tests: Static testing to evaluate acid-generating and neutralising potential of waste materials.
  • XRD/XRF and Leach Extraction Analyses: Mineralogical and chemical profiling to determine composition, leachability, and potential for contaminant release.
  • Kinetic Tests (Humidity Cell Tests, Column Tests): Long-term prediction of drainage chemistry and contaminant generation under field-representative conditions.
  • Field Tests: In-situ sampling and on-site geochemical assessments to validate laboratory findings.
  • Geochemical Modelling: Predictive modelling of water–rock interactions, contaminant transport, and long-term drainage quality using advanced geochemical software.

Our Waste Classification Services Include:

  • Waste classification in accordance with South African legislation, including the National Environmental Management Act (NEMA) and the National Environmental Management: Waste Act (NEMWA).
  • Classification of waste streams in line with the National Norms and Standards for the Assessment of Waste for Landfill Disposal and the National Norms and Standards for Disposal of Waste to Landfill.