393. Do the toxic chemical categories such as nickel compounds include all compounds, even those that have not been associated with adverse health effects? What is the authority for this decision?
The EPCRA Section 313 list established by Congressional legislation included categories. EPA interprets these listings to mean all compounds of nickel, for example, regardless of whether specific toxicological problems have been identified for a specific compound in the category. However, EPA may grant, and has granted, petitions to delete specific compounds from a category if the Agency determines that the compound does not meet the listing criteria.