NIOSH Standard Testing Procedures (STP-0602, STP-0603, and STP-0604) Update

NIOSH has updated three Standard Testing Procedures (STP):

• STP-0602—Determination of Capacity of As-Received and Environmentally Treated Closed-Circuit Escape Respirators (CCER)—has been updated to Revision 1.0, dated 05 January 2022.
• STP-0603—Determination of Performance of As-Received and Environmentally Treated Closed-Circuit Escape Respirators (CCER)—has been updated to Revision 1.0, dated 05 January 2022.
• STP-0604—Determination of Capacity Test of Closed-Circuit Escape Respirators (CCER) at Manufacturer’s Recommended Minimum Temperature—has been updated to Revision 1.0, dated 05 January 2022.

Please review the procedures for a description of the specific changes