About: http://webisa.webdatacommons.org/439218345

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	Essentially sewer gas is collected in the sewage system from organic or industrial waste, and is a combination of toxic and non-toxic gases.
http://www.w3.org/ns/prov#wasQuotedFrom	draincity.com