Hi westaussie.
They ideally need to get it below 0.1 Phos
UMC Phos is 0.07 not 0.007.
As you would have seen in doing your comparison with grades,IOH 60.7%Fe UMC 60.02%Fe - IOH SiO2 3.2% UMC 3.7% -IOH Al2O3 2.4% UMC 2.6% - Phos IOH 0.19% UMC 0.07% -LOI IOH 6.7% UMC 7.44%.
Regards
Westcott.