B-Benchmark Presentation [Read-Only]

This presentation should not be considered a final statement of NIOSH policy or of any agency or individual who was involved. This information is intended for use in advancing knowledge needed to protect workers. Comments regarding this presentation may be submitted to the NIOSH Docket Office.Proposed Challenge & End Point Concentrations for Respirator CanistersDraft for DiscussionCBRN APR Test ChallengeGuidelines for determining test challenge concentrations:1. (REL) X (Full Face APF) X (Safety Factor) 4. Minimum Test Challenge = 3 X (IDLH)2. Set APF= 50 5. Breakthru = (REL) / 23. Set Safety Factor, S.F. = 2.0Calculated Test Challenge1. (REL) X REL APF S.F. IDLH 3(IDLH) Test Brkthru (F.F. APF) X Conc. Conc. (SF)Initial Initial 25 50 2 300Ammonia 2500 900 2500 12.535 50 2 1200Carbon Monoxide 3500 3600 3600 17.5Carbon Tetrachloride 2502 200 200 600 600 1Cyanogen Chloride 0.03 50 3 ------ ---- 3 0.02Cyclohexane 300 50 2 30000 1300 3900 30000 150Formaldehyde 1.5 50 2 150 20 60 150 0.0164.7 50 2 50Hydrogen Cyanide 470 150 470 2.3510 50 2 100Hydrogen Sulfide 1000 300 1000 51502 20Nitrogen Dioxide 100 60 100 0.5Phosgene 0.2 5 20 2 6200.1Phosphine 0.3 50 2 30 50 150 150 0.15Sulfur Dioxide 2502 200 100 300 300 1Draft for DiscussionCBRN APR Test ChallengeGuidelines for determining test challenge concentrations:1. (REL) X (Full Face APF) X (Safety Factor) 4. Minimum Test Challenge = 3 X (IDLH)2. Set APF= 50 5. Breakthru = ...