About: http://webisa.webdatacommons.org/207305957

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	Local contamination concerns could be manmade or substances that can occur naturally in the environment, such as arsenic and radon.
http://www.w3.org/ns/prov#wasQuotedFrom	ngwa.org