For all tests, the leaching temperature is 23 °C. Finally, the WET headspace is purged vigorously with N2 prior to sealing and agitation,whereas the TCLP headspace is ambient air.For this study, all leaching tests were compared for both extraction durations (18 and 48 h), both agitation methods (shaker table and tumbler), and both headspace treatments (N2 and ambient). Following leaching, the liquid for all samples was filtered through a 0.45µm glass fiber filter before analysis.