About: http://webisa.webdatacommons.org/197365536

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	Section 8425 requires that tests for gas and vapors must be made before the start [of any welding, cutting, or other hot work and/or spark producing operation] and continuously during such operation.
http://www.w3.org/ns/prov#wasQuotedFrom	ca.gov