CIRO Ammonia Safety & Emergency Response — Questions and Answers
Question 1: What is the OSHA Permissible Exposure Limit (PEL) for ammonia?
- 50 ppm (8-hour TWA) (Correct answer)
- 25 ppm
- 100 ppm
- 10 ppm
Correct answer: 50 ppm (8-hour TWA)
OSHA sets the PEL for ammonia at 50 ppm as an 8-hour time-weighted average. The IDLH (Immediately Dangerous to Life and Health) concentration is 300 ppm, and the odor threshold is 5-50 ppm.
Question 2: What personal protective equipment is required when working with ammonia systems?
- Full-face self-contained breathing apparatus (SCBA) or ammonia-rated respirator, chemical splash goggles, rubber gloves, and protective clothing (Correct answer)
- Only safety glasses
- No special PPE is required for ammonia
- Only a dust mask
Correct answer: Full-face self-contained breathing apparatus (SCBA) or ammonia-rated respirator, chemical splash goggles, rubber gloves, and protective clothing
Ammonia PPE includes SCBA or ammonia-rated respirator cartridges, chemical splash goggles (ammonia is caustic to eyes), chemical-resistant gloves and boots, and protective clothing to prevent skin contact with liquid ammonia.
Question 3: What is the RAGAGEP standard for ammonia refrigeration systems?
- Recognized and Generally Accepted Good Engineering Practices, including IIAR standards, ASHRAE 15, and applicable building codes (Correct answer)
- A type of ammonia detector
- A refrigerant blend designation
- A compressor manufacturer's trademark
Correct answer: Recognized and Generally Accepted Good Engineering Practices, including IIAR standards, ASHRAE 15, and applicable building codes
RAGAGEP includes IIAR standards (IIAR-2 for piping, IIAR-5 for start-up), ASHRAE Standard 15, and ANSI/ASME codes that define safe design, installation, and operation of ammonia refrigeration systems.
Question 4: What should be the immediate response to an ammonia leak?
- Evacuate the area, alert others, activate the emergency response plan, shut down the system if safe to do so, and contact emergency services (Correct answer)
- Investigate the leak alone
- Continue working and monitor the situation
- Open windows for ventilation
Correct answer: Evacuate the area, alert others, activate the emergency response plan, shut down the system if safe to do so, and contact emergency services
Ammonia leak response follows the facility's Emergency Action Plan: evacuation, notification, system shutdown (if safe), donning appropriate PPE before attempting any remediation, and calling for emergency support.
Question 5: What is the EPA Risk Management Program (RMP) and when does it apply?
- A program requiring facilities with 10,000+ pounds of ammonia to develop risk management plans, conduct hazard analyses, and maintain emergency procedures (Correct answer)
- A voluntary environmental certification
- A program for small residential systems only
- A maintenance scheduling system
Correct answer: A program requiring facilities with 10,000+ pounds of ammonia to develop risk management plans, conduct hazard analyses, and maintain emergency procedures
EPA's RMP rule (40 CFR Part 68) applies to facilities with more than 10,000 pounds of anhydrous ammonia, requiring hazard assessment, prevention programs, and emergency response procedures.
Question 6: What is Process Safety Management (PSM) as it applies to ammonia refrigeration?
- An OSHA standard (29 CFR 1910.119) requiring comprehensive safety management for facilities with 10,000+ pounds of ammonia (Correct answer)
- A computer-based maintenance system
- A quality control program for food processing
- A training program for new employees only
Correct answer: An OSHA standard (29 CFR 1910.119) requiring comprehensive safety management for facilities with 10,000+ pounds of ammonia
PSM requires facilities exceeding the ammonia threshold to implement 14 safety elements including process hazard analysis, operating procedures, training, mechanical integrity, management of change, and incident investigation.
CIRO Ammonia Safety & Emergency Response
What is the OSHA Permissible Exposure Limit (PEL) for ammonia?