Burped GV18 gate annulus accumulated gas into pump cart*Opened GV18 (now Y2 has ion pump pumping)*Valved-in IP5*Valved-out, isolated and spun-down YBM MTP*Burped GV5 gate annulus accumulated gas into pump cart*Opened GV5 (now Y1 has ion pump pumping)*Valved-in IP6*Valved-out, isolated and spun-down XBM MTP