About: http://webisa.webdatacommons.org/40341699

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	However, many states require the levels of contaminants in foundry sands, slags and other industrial waste to be below certain levels prior to their reuse.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com