Section 8.61.1050. Additional permit-required confined space standards.

	(a)  29 C.F.R. 1910.146(a), as amended, is revised to read: "This section contains requirements for practices and procedures to protect employees in general industry and construction industry from the hazards of entry into permit-required confined spaces."  
	(b)  Notwithstanding 29 C.F.R. 1910.146, the employer shall ensure that double block and bleed systems are not used as a means of isolation when the ambient air temperature at the point of isolation or the temperature of the product in the line at the point of isolation is at or below 32 degrees Fahrenheit (0 degrees Celsius).  
	(c)  The note provided in 29 C.F.R. 1910.146(d)(6) is revised to read:  
NOTE: Attendants may not be assigned to monitor more than one permit space. Attendants may be stationed at any location outside the permit space to be monitored as long as the duties described in 29 C.F.R. 1910.146(c)(5)(i) can be effectively performed for each permit space that is monitored by the attendant. The attendant must be in direct and constant communication with the entrants.  
	(d)  The following definition supplements those definitions found in 29 C.F.R. 1910.146(b): "calibrated direct-reading instrument" means a sampling instrument in which analysis takes place within the instrument such that sampling information can be read directly from a deal or display that has been checked for accuracy against a standard of known specifications and adjusted, if necessary, according to specifications or recommendations of the manufacturer to indicate values as close as possible to the true value.