ARD Test Handbook
Protocol Booklet for Assessment of the Acid Forming Potential of Mine Waste Materials
Acid rock drainage (ARD) is produced by the exposure of sulphide minerals such as pyrite to atmospheric oxygen and water. The ability to identify in advance any mine materials that could potentially produce ARD is essential for timely implementation of mine waste management strategies for ARD control.
A number of procedures have been developed to determine the acid forming characteristics of mine waste materials. The most widely used assessment methods for ARD characterization are the Acid-Base Account (ABA) and the Net Acid Generation (NAG) test. These methods are referred to as static procedures because each involves a single measurement in time.
AMIRA. 2002. ARD Test Handbook. Project P387A. Prediction and Kinetic Control of Acid Mine Drainage, AMIRA International Limited, Melbourne, Australia.
EIS Timeline - Feb 2019
- Public scoping period and scoping meetings
[5 meetings between Mar-Jun 2016; comment period extended from 60 days to 120 days, closed Jul 18, 2016 ]
- Compile and review existing data
- Prepare project description and identify project alternatives
We Are HereValidate Baseline Information; analyze environmental effects
Prepare Draft EIS
- Federal Register Notice of Availability of Draft EIS
- 90-day public review and comment period, with public meetings
- Respond to public comments and prepare Final EIS
- Federal Register Notice of Availability of Final EIS and Draft ROD
- 45-day Public Objection Period
- Resolve objections to Final EIS and draft ROD
- Issue Final Record of Decision