Which aspect is critical when interpreting PECQ values?

Interpreting PECQ values requires a deep understanding of the context of ecological risk as well as species sensitivity. This aspect is critical because PECQ values are designed to assess the likelihood of adverse ecological effects resulting from chemical exposure in aquatic environments. Different species may have varying levels of sensitivity to pollutants, meaning that the presence of a chemical at a certain concentration may pose significant risks to some species while being less harmful to others.

By understanding the context of the ecosystem being studied and the specific sensitivities of species within it, practitioners can make more informed decisions regarding environmental management and potential risks. This is vital in evaluating the overall ecological health and developing appropriate strategies for conservation and remediation. Factors like the mode of transportation of substances, duration of exposure, and remediation costs, while relevant in other contexts, do not directly influence the interpretation of PECQ values in the way that ecological context and species sensitivity do.