The maximum dissolution accounts for about a 0.031% change in surface area (calculated based on manufacturer’s reported surface area and density). For this same case (SL2, 48 hr, tumbler, and N2 head), 0.47% of the sorbed arsenic leached. For the standard WET with GFH, 0.19% of the sorbed As leached, whereas iron dissolution accounted for an 0.031% loss of surface area