sediment_data_explorer is able to read data from a number of different sources which use a range of different units to report the measurement of the same chemicals the table below shows how all the data sources are standardised to that of the MMO Sediment Template.

ChemicalMMO TemplateDredge Data DumpDisposal at SeaSocotec Interim Results
UnitsppppMultiplier in ProgramppMultiplier in ProgramunitsMultiplier transfer to MMO format
Trace Metalmg/kgppmppm1ppm1mg/kg1
Organotinsmg/kgppmppm1ppm1µg/kg0.001
PAHµg/kgppbppb1ppb1µg/kg1
THCmg/kgppmppm1ppb0.001µg/kg0.001
PCBmg/kgppmppb0.001ppb0.001µg/kg0.001
Organochlorinemg/kgppmppb0.001ppb0.001µg/kg0.001
BDEmg/kgppmppb0.001ppb0.001