ENV-ARD-24
Environmental & Water Analysis
Acid Rock Drainage (ARD): Acid-Base Accounting (ABA) & NAG Testing
Static geochemical characterization determining the acid-generating or acid-neutralizing capacity of mine waste rock and tailings for EIA, closure planning, and tailings storage design.
Detection Limits
kg H2SO4 / tonne equivalent (0.1 kg/t precision)
Turnaround (TAT)
Standard: 5-7 Working Days
Sample Requirement
1.0 kg representative waste rock, drill core, or tailings pulp
Quality Framework
ISO/IEC 17025 Compliant
Analytical Overview & Methodology
Acid Rock Drainage (ARD) represents one of the largest long-term environmental liabilities in mining. RVA Laboratories provides comprehensive Acid-Base Accounting & NAG Testing (ENV-ARD-24) to support environmental compliance.
Technical Method Specifications (ENV-ARD-24)
| Method Code | ENV-ARD-24 |
|---|---|
| Element Coverage | Maximum Potential Acidity (MPA), Neutralization Potential (NP), Net Neutralization Potential (NNP), NAG pH |
| Detection Range | kg H2SO4 / tonne equivalent (0.1 kg/t precision) |
| Sample Requirement | 1.0 kg representative waste rock, drill core, or tailings pulp |
| Instrumentation | Automated Titrators + LECO Sulphur Analyzer + Temperature-Controlled Reaction Vessels |
| Standard Turnaround | Standard: 5-7 Working Days |
Laboratory Protocols & Execution Specs
- Acid Potential: Total & Sulphide Sulphur via LECO for Maximum Potential Acidity (MPA)
- Neutralization Potential (NP): Modified Sobek titration method
- NAG Testing: Hydrogen peroxide accelerated oxidation testing (NAG pH & NAG titration)
- Classification: Standard AMIRA / GARD ARD risk classification reporting
JORC & NI 43-101 Data Integrity Guarantee
Every batch tested under method ENV-ARD-24 includes matrix-matched Certified Reference Materials (CRMs), analytical blanks, and duplicate splits at a minimum 20% insertion rate. Official digital Certificates of Analysis are digitally signed and traceable.