The Toxics option is enabled only if toxics are being simulated. When selected, the labels in the Layer Settings frame changes. The Total Seds becomes Total Tox and the Sed Class becomes Tox Class. Their function is the same but they apply to toxics classes instead of sediment classes. In addition the user can select the state of the toxics, either:
Total Total toxic concentration for the class option selected.
Tox (Diss) Dissolved phase concentrations for the class option selected.
Tox (DOC) Toxic concentration of the dissolved organic carbon (DOC) complexed phase for the class option selected.
Tox (POC) Toxic concentration of the particulate organic carbon (POC) adsorbed phase for the class option selected.
POC The POC concentrations assigned to the sediments.
DOC The DOC concentrations assigned to the sediments.