Midland, AQHY 30058 with sulphuric acid tank CSA 0073, originally built by the WAGR Midland Workshops in 1964/66 as a WF type flat waggon, then in 1997, following several recodes and modifications, was one of seventy five waggons converted to the WQH to carry CSA sulphuric acid tanks between Hampton/Kalgoorlie and Perth/Kwinana.