About: http://webisa.webdatacommons.org/202871560

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	Common impurities such as calcium, magnesium and oxygen can, if they are not controlled, effect boiler performance and durability.
http://www.w3.org/ns/prov#wasQuotedFrom	state.or.us