Left: ionization corrections for the EMP DLA toward J1147+5034. We plot the expected correction for all of the observed elements as a function of gas volume density. The vertical dashed line correspond to the estimated gas density of the DLA. Right: column density ratio of successive ion stages of Si versus gas density. We also plot the observed values of the Si III/Si II ion ratio (dashed lines with gray shaded region encompassing the associated errors) and use this to determine the associated gas density. This highlights that O I is stable against ionization corrections and the impact on Fe II would only serve to increase the enhancement of [O/Fe] observed for EMP DLAs relative to VMP DLAs.