COMPLIANCE INFO_2023 HEATH & SAFETY PLAN

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Hydrogen sulfide (7783-06-4) Ceilings Not established Not established Not established 10 mg/m3 MAC 10 ppm Peak; 14.2 mg/m3 Peak STELs 5 ppm STEL 15 ppm STEV; 21 mg/m3 STEV 15 ppm STEV; 21 mg/m3 STEV Not established Not established TWAs 1 ppm TWA 10 ppm TWAEV; 14 mg/m3 TWAEV 10 ppm TWAEV; 14 mg/m3 TWAEV Not established Not established MAKs Not established Not established Not established Not established 5 ppm MAK; 7.1 mg/m3 MAK Exposure Limits/Guidelines (Con't.) Result Germany TRGS NIOSH OSHA Singapore Carbon monoxide (630-08-0) TWAs 30 ppm TWA (exposure factor 1); 35 mg/m3 TWA (exposure factor 1) 35 ppm TWA; 40 mg/m3 TWA 50 ppm TWA; 55 mg/m3 TWA 25 ppm PEL; 29 mg/m3 PEL Ceilings Not established 200 ppm Ceiling; 229 mg/m3 Ceiling Not established Not established Hydrogen sulfide (7783-06-4) STELs Not established Not established Not established 15 ppm STEL; 21 mg/m3 STEL TWAs Not established Not established Not established 10 ppm PEL; 14 mg/m3 PEL Ceilings Not established 10 ppm Ceiling (10 min); 15 mg/m3 Ceiling (10 min) 20 ppm Ceiling Not established 8.2 Exposure controls Engineering Measures/Controls l Adequate ventilation systems as needed to control concentrations of airborne contaminants below applicable threshold limit values. If this gas mixture is used in a poorly-ventilated area, install automatic monitoring equipment to detect the levels of component gases. Personal Protective Equipment Pictograms l Respiratory l In case of insufficient ventilation, wear suitable respiratory equipment. Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or symptoms are experienced. Eye/Face l Wear safety glasses. Skin/Body l Wear protective gloves leather gloves when handling cylinders; chemically resistant gloves when using this gas mixture and clothing . Environmental Exposure Controls l Controls should be engineered to prevent release to the environment, including procedures to prevent spills, atmospheric release and release to waterways. Key to abbreviations ACGIH =American Conference of Governmental Industrial Hygiene PEL =Permissible Exposure Level determined by the Occupational Safety and Health Administration (OSHA) MSHA =Mine Safety and Health Administration STEL =Short Term Exposure Limits are based on 15-minute exposures NIOSH =National Institute of Occupational Safety and Health STEV =Short Term Exposure Value OSHA =Occupational Safety and Health Administration TWAEV =Time-Weighted Average Exposure Value MAK =Maximale Arbeitsplatz Konzentration is the maximum permissible concentration TWA =Time-Weighted Averages are based on 8h/day, 40h/week exposures 0.0015 – 23.5% Oxygen; 0.0005% – 2.5% Methane; 0.0005 – 1.0% Carbon Monoxide; 0.001 – 0.025% Hydrogen Sulfide; Nitrogen Gas balance0.0015 – 23.5% Oxygen; 0.0005% – 2.5% Methane; 0.0005 – 1.0% Carbon Monoxide; 0.001 – 0.025% Hydrogen Sulfide; Nitrogen Gas balance0.0015 – 23.5% Oxygen; 0.0005% – 2.5% Methane; 0.0005 – 1.0% Carbon Monoxide; 0.001 – 0.025% Hydrogen Sulfide; Nitrogen Gas balance0.0015 – 23.5% Oxygen; 0.0005% – 2.5% Methane; 0.0005 – 1.0% Carbon Monoxide; 0.001 – 0.025% Hydrogen Sulfide; Nitrogen Gas balance Preparation Date: 10/August/2012Preparation Date: 10/August/2012Preparation Date: 10/August/2012Preparation Date: 10/August/2012 Revision Date: 16/December/2013Revision Date: 16/December/2013Revision Date: 16/December/2013Revision Date: 16/December/2013 Format: EU CLP/REACH Language: English (US)Format: EU CLP/REACH Language: English (US)Format: EU CLP/REACH Language: English (US)Format: EU CLP/REACH Language: English (US) OSHA HCS 1994, WHMIS, UN GHS, EU CLP, EU DSD/OSHA HCS 1994, WHMIS, UN GHS, EU CLP, EU DSD/OSHA HCS 1994, WHMIS, UN GHS, EU CLP, EU DSD/OSHA HCS 1994, WHMIS, UN GHS, EU CLP, EU DSD/DPDDPDDPDDPDPage 7 of 18Page 7 of 18Page 7 of 18Page 7 of 18