About: http://webisa.webdatacommons.org/38962824

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Therefore, lead is a constituent that is already present in the copper smelting process and is already being managed in process residues.
http://www.w3.org/ns/prov#wasQuotedFrom	federalregister.gov