Risk Assessment for the Listing Determinations for Inorganic ChemicalManufacturing Wastes: Background Document

摘要

This document describes the risk assessment performed in support of EPA's listingdeterminations for wastes generated in the production of inorganic chemicals, as specified in the EDF/EPA settlement agreement. Based on an evaluation by EPA of current waste management practices in the inorganics chemical manufacturing sectors covered by the consent decree, EPA determined that wastes generated in five sectors required further evaluation, including quantitative analysis and assessment of risks to human health. The five sectors are: Wastes from production of sodium phosphate from wet process phosphoric acid; Sodium chlorate production wastes; Inorganic hydrogen cyanide production wastes; Titanium dioxide production wastes; Antimony oxide production wastes. The risk assessment described herein was restricted to characterizing the risks to human health through the groundwater pathway.