About: http://webisa.webdatacommons.org/101245559

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	(2) The floor of the storage facility shall be constructed of continuous smooth and impervious materials, such as Portland cement, concrete or steel, to prevent or minimize penetration of PCBs.
http://www.w3.org/ns/prov#wasQuotedFrom	pacode.com