What NIOSH IDLH level does OSHA use and enforce?
Willson Safety Products receives numerous inquiries about selecting and using the correct respiratory protection device for specific contaminants and/or contaminant concentrations. In order to alleviate any confusion regarding these levels, Willson Safety Products would greatly appreciate OSHA’s policy and stance on this issue. Thank you in advance for your time and consideration on this matter. Sincerely yours, Dave Koch Senior Technical Service Specialist September 14, 1995 Dave Koch Senior Technical Service Specialist Willson PO Box 622 Reading, PA 19603-0622 Dear Mr. Dave Koch: This is in response to your letter to Mr. Jim Johnson dated August 30, 1995. Your letter was forwarded to the OSHA National Office for response. The letter requested a clarification on OSHA’s policy regarding IDLH since NIOSH has lowered several IDLH levels in their (1994) NIOSH Pocket Guide to Chemical Hazards. IDLH actual numeric limits or levels are not specified in OSHA standards. IDLH limits are specifi
