The Brukunga mine site is a former open pit iron sulfide mine that continues to contribute to Acid and Metalliferous Drainage (AMD) into downstream waterways. Mine-based sources of AMD include the waste rock dumps and tailings storage facility. In 2007, the Brukunga Mine Remediation Program team commenced an assessment of long-term remediation options which could be used to rehabilitate the mine site. The currently preferred design of a remediation method involves the subaqueous disposal of co-disposed waste rock and tailings, with a cover system put in place to prevent ongoing oxidation of sulfidic materials. To confirm the geochemical performance of the proposed design, a series of kinetic and geochemical tests were conducted to test various waste composition scenarios. The trials consisted of combining, compacting and saturating waste materials and limestone in various proportions at various scales, and then testing leachate and water cover chemistry over time. The trials are an attempt to de-risk the chosen remediation option, and their outcomes will demonstrate its effectiveness plus identify any issues arising during the trials that would require further testwork. The aim of this manual is to report on the construction of leachate trials conducted at Brukunga between 2010 and 2014, when the following testwork was carried out: • Bench test column leach trials; • Bin scale column leach testwork; • Field-based geochemical test cell setup and monitoring. The appendices to the manual provide further background information about the monitoring, sampling and testing procedures that have been used during the trials. The many personnel involved with the work over time are also acknowledged, and include: • Technical Advisory Group (TAG – geochemical) • Brukunga mine site personnel • Laboratory services • Department of State Development (DSD) Brukunga team • Vacation students.