H2S Awareness vs. H2S Clear: Which Do You Need?

Job postings and gate checks in the Permian often say "H2S required" without naming a course. Two names come up most: H2S Awareness and H2S Clear. They are not the same thing, and one may not stand in for the other. This guide explains the difference and where H2S requirements come from: Texas rules, an industry standard, and the operator's own contractor program. It also shows how to find the exact course your operator accepts before you pay for a class.

What H2S Clear is

H2S Clear is a course owned by Veriforce, the company behind the PEC contractor network. Veriforce lists it as 3.5 to 4 hours, instructor-led, in person or by live distance learning, aligned to ANSI/ASSP Z390.1-2024, and required annually (Veriforce H2S Clear). Veriforce's PEC card lets a hiring company check a worker's training when they arrive on site (Veriforce).

What "H2S Awareness" usually means

"Awareness" is a generic label, not one branded course. Providers use it for shorter classes on what H2S is, how to recognize it and how to get out. Permian price lists we checked on October 1, 2026 showed H2S Awareness classes from about $60 to $149. At least one was listed as a one-hour class.

A one-hour class will not cover the same ground as a 4-hour one. Taking the wrong course means paying for a second class and losing another half day off the job.

Side by side

Where H2S requirements come from

Texas Rule 36

Railroad Commission Statewide Rule 36 covers oil and gas operations in H2S areas. Operators whose operations contain more than 100 ppm H2S must train their employees who work in affected areas, and must use service companies whose personnel have been trained. Training must include the hazards and characteristics of H2S, safety precautions, and how to operate safety equipment and life support systems. Operators must give training schedules and course outlines to the Commission on request (16 TAC §3.36). The rule sets topics, not a course name.

ANSI/ASSP Z390.1

Z390.1 is a voluntary standard for H2S training programs. It sets minimum course content and instructor qualifications for people who may be exposed above the occupational exposure limit (ANSI/ASSE Z390.1 preview). OSHA refers employers to it (OSHA eTool). There is no OSHA standard written just for H2S, so this is the benchmark operators tend to use. Veriforce says abbreviated refresher training is no longer a valid option under it, and that training should run 3 to 4 hours (Veriforce).

The operator's contractor program

Most of the specific requirements you run into come from the operator. Many manage contractors through ISNetworld or Veriforce PEC:

• ISNetworld collects contractor safety, insurance and training information and tracks worker-level training against each hiring client's requirements (ISN).
• Veriforce collects safety statistics, programs and certifications, and its PEC card lets an operator check a worker's training on arrival.

Inside these programs, the operator decides which H2S course it accepts and how often. That is where "H2S Clear required" usually comes from. See ISNetworld vs. PEC/Veriforce for how the two systems work.

How to find out which one you need

1. Ask the operator's contractor coordinator or your company's safety contact which H2S course they accept. Get the course name, not just "H2S."
2. If your company has an ISNetworld or Veriforce account, check the requirement listed for that operator.
3. Ask whether online training is accepted. Veriforce notes that ANSI does not recommend online or computer-based H2S training.
4. Ask how often it must be renewed. For most H2S courses it is yearly.
5. Get the answer in writing if you can, and have it in hand when you book a class.

If you work for more than one operator

Requirements differ from one operator to the next. One may accept any H2S course that follows ANSI Z390.1. Another may name a single course. If your crew moves between operators, find out what each one requires and train to the strictest. One card that satisfies everyone is cheaper than two.

Questions to ask about any H2S course

• Who issues the card, and how does an operator verify it?
• Which standard does the course follow, and which edition?
• How long is the class, and is it in person or online?
• Is there hands-on practice with monitors and respiratory equipment?
• When does the card expire?

The answers tell you more than the course name does.

Where our class fits

Our H2S safety class is 4 hours, in person, and follows ANSI Z390.1. Every student wears and bump tests a personal monitor, puts on an escape pack or SCBA, and takes a written test. It is $125, or $105 each for 4 or more. It is not H2S Clear, so if your operator names H2S Clear, ask them whether they accept another course. Tell us which card your operator requires and we will tell you whether our class meets it before you pay. What the class covers is in H2S training in Midland.