PEC Learn H2S Clear Awareness Training

Prepare and Protect Your Workers and Yourself from Toxic H2S

Hydrogen Sulfide, or H2S, is a hazard that creeps up on you. You can’t see it, and if the concentration is high enough, you can’t smell it. This toxic gas is colorless and collects in low lying areas. H2S is so powerful that it can kill you with one breath. It is known as the “Silent Killer.”

Lifesaving Safety Training for Workers in Hydrogen Sulfide Risk Areas

H2S Clear arms thousands of workers with crucial knowledge of the dangers of H2S and the precautions, tools, and necessary actions for working around rigs, pipelines, refineries, storage tanks, tankers and terminals.

Educating workers, establishing sound safety procedures, providing proper protective equipment and requiring accredited safety training courses such as H2S Clear are proven methods to protect your workforce and your business.

Don’t fall victim to H2S. Sign up for H2S training today!

H2S Clear Course Information

It’s essential that workers understand the physical and chemical properties of H2S, the signs/symptoms of exposure, and as well as the appropriate response in the event of a release.

Course Detail

  • Length: 4 hours
  • Delivery Method: Instructor-led as required by industry regulations
  • Refresher Needed: Training is required annually per the industry recognized ANSI/ASSE Z390.1-2017 H2S training standard


Course Syllabus

Module 1:

  • Industry Overview
  • Introduction to Hydrogen Sulfide
  • Effects of Hydrogen Sulfide 
  • Controlling the Hazards 
  • Reducing Hazards

Module 2:

  • Protecting Workers: Detection and Monitoring
  • Protecting Workers: Respiratory Protection
  • Emergency Response
  • Emerging Technology
  • Protecting Yourself


  • Glossary
  • Acronyms and Abbreviations

Completion Information

Upon successful completion of the course and competency exam, all students are issued a physical and digital Veriforce PEC learn ID card with their name, company name, picture, barcode, and completed course. All students are automatically entered into the Veriforce training database where your company’s clients and auditors can view proof of completion at

Accreditation and Regulatory Information

H2S Clear meets the revised standards set forth in the American National Standards Institute and American Society of Safety Engineers policy (ANSI/ASSE), as well as includes regulations and requirements set forth by OSHA, American Petroleum Institute (API), Bureau of Safety & Environmental (BSEE), Environmental Protection Agency (EPA), Railroad Commission of Texas and various other regulatory agencies:

  • OSHA 29 CFR 1910.134 & CFR 1926
  • API RP 49
  • API RP 55
  • BSEE 30 CFR 250.490
  • MMS 250.490
  • The Railroad Commission of Texas
  • ACGIH’s New TLV
  • ANSI/ASSE Z390.1-2017

Course Objectives

Learn how to Protect Yourself when Working around H2S.

The objective of this course is to ensure participants gain the required knowledge and understanding of H2S (hydrogen sulfide) as a hazard, as well as appropriate precautions and emergency response actions to take in case of exposure.

Upon successful completion of this course and competency exam, participants will be able to:

  • Describe the regulations and standards that are applicable to hydrogen sulfide.
  • Compare and contrast the responsibilities of companies and workers.
  • Identify the sources of hydrogen sulfide.
  • Describe the physical and chemical properties of hydrogen sulfide.
  • Explain the factors of hydrogen sulfide exposure.
  • Discuss the health effects of hydrogen sulfide.
  • Explain how engineering controls are used to control hydrogen sulfide.
  • Describe the sources, hazards, and control measures associated with sulfur dioxide.
  • Identify administrative controls used to reduce exposure to hydrogen sulfide:
    • Warning signs, alarms and stop work authority
    • Job safety analysis
    • Observation of wind conditions
    • The buddy system
  • Describe how the American Petroleum Institute’s Recommended Practices are used to prevent exposure to hydrogen sulfide.
  • Compare and contrast the different hydrogen sulfide detection and monitoring methods.
  • Describe how to correctly use a gas monitor to detect the presence of hydrogen sulfide.
  • List the information required in a company’s Respiratory Protection Program.
  • Describe the required respiratory protection and site-specific training required before beginning work at a jobsite.
  • Explain how medical evaluations are used to make sure workers can use respirators safely.
  • Explain the importance of being fit tested before using a respirator in the field.
  • Compare types of respirators used for protection against hydrogen sulfide exposure.
  • Describe the criteria that companies use to select respirators for workers.
  • Explain how to use respiratory protection to meet the regulatory requirements of 29 CFR 1910.134.
  • Name the essential parts of a hydrogen sulfide emergency plan.
  • List the steps for a typical hydrogen sulfide rescue procedure and discuss the importance of training for providing first aid.
  • Explain the purpose of post-exposure medical evaluations.
  • Recognize the importance of being trained on emerging technology.

Meet H2S – The Silent Killer

The primary method of H2S exposure is through inhalation, where the gas is rapidly absorbed by the lungs. People can sometimes smell the “rotten egg” odor of hydrogen sulfide when lower concentrations of the gas exist. However, after continuous low-level exposure, or with higher concentrations, a person loses his/her ability to smell the gas which means you can NOT rely on your sense of smell to indicate the presence of hydrogen sulfide.

Where You Find H2S?
H2S can occur naturally or be produced during industrial processes. Natural H2S is produced through the decomposition of organic material by bacteria within a low oxygen environment. During industrial operations, H2S can form as a product, byproduct or waste material.

Oil & Gas Industry for Upstream, Midstream and Downstream
Oil and natural gas wells; in refineries, where H2S is removed from natural gas and oil; and in pipelines and tankers used to carry unrefined petroleum – Shale Shaker Areas, Fluid Treatment Areas, Rig Floor, Belle Nipple, Mud Tanks, Mud Pump Areas, Storage Tanks, Wellhead, Cellar, Drilling Floor, Pump Houses, Gas Processors, Manure Tanks & Ponds, Plug Flow Digesters, Storage Tanks, Transportation (trucks, barges and rail cars), Underground Natural Gas Storage Facilities.

Pulp and Paper Industry
H2S is a by-product of wood breaking down into pulp in making paper, fertilizers, glues, dyes, plastic wrap, etc.

Construction Industry
Underground Utilities and Excavation work in swamps or landfills, Wastewater/Sewage Industry, sewers, septic tanks, and sewage treatment plants.

Agriculture Industry
Manure tanks, bogs, swamps and other places where organic material breaks down without oxygen.

Other Areas 
Mining, tunnels, coke ovens, coal-fired plants and animal processing plants.

Additional Resources

Why Veriforce PEC Learn?

Veriforce’s PEC Learn Safety Training courses are the most recognized and widely accepted in the oil and gas industry. Whether you are an owner, operator, contractor, or instructor, Veriforce offers a high quality, instructor led, comprehensive and accredited H2S awareness program tailored to the specific hazards of working in an identified at risk hydrogen sulfide area.

Sign up for H2S Clear Now