About: http://webisa.webdatacommons.org/456489257

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	In these schemes, there is an attempt to move contaminants directionally along a clean to less clean gradient.
http://www.w3.org/ns/prov#wasQuotedFrom	osha.gov