About: http://webisa.webdatacommons.org/147677028

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	They may contain fuels, solvents, degreasers, and other chemicals used with heavy equipment and rock blasting operations.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov