About: http://webisa.webdatacommons.org/434411049

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	(3) Contaminant: Any chemical, ion, radio-nuclide, synthetic organic compound, microorganism, waste or other substance that does not occur naturally in groundwater or that occurs naturally but at a lower concentration.
http://www.w3.org/ns/prov#wasQuotedFrom	state.or.us