How were the constituents of concern selected?
The potential constituents of concern were first identified through data sources as chemicals that could reasonably be expected to be associated with wastes from the production of azo, triarylmethane, perylene or anthraquinone dyes or pigments. Then, chemicals without toxicity benchmarks and those that could not be directly linked with the manufacture of the dyes and pigments of concern were removed. Finally, a risk assessment was performed on the remaining chemicals to identify the constituents of concern and their corresponding annual mass loading limits for these wastes managed in landfills.
