Jenkins Academy of Applied Technology
PRCS-001-GI — Learner reference
Permit-Required Confined Spaces · v1.0.0 · October 22, 2026
Course developed by Todd Jerome Jenkins, MS, CSP.
Learn the OSHA requirements for permit spaces, entry roles, testing, permits and rescue planning. Twelve audible lessons with practice and a final quiz. Allow about 45–60 minutes; actual role skills and site training remain separate.
This online knowledge component does not authorize entry or qualify a technical rescuer. The employer must provide actual site and equipment instruction, establish assigned-role proficiency, certify training and implement the applicable permit-space program.
1. Recognize a permit space
By the end: Distinguish a confined space from a permit-required confined space.
This course explains the general-industry permit-space standard, 29 CFR 1910.146. It does not cover construction, agriculture or shipyard rules. Construction confined spaces have a separate standard and course. Other standards, including hazardous-energy control and respiratory protection, may also apply to the work.
A confined space has all three features: a person can bodily enter it to do work; entry or exit is limited or restricted; and it was not designed for continuous employee occupancy. Examples may include tanks, bins, pits and vaults. A space does not have to be tiny or fully enclosed. Evaluate the actual space rather than relying on its name.
A confined space becomes permit-required if it has at least one of these features: an actual or potential hazardous atmosphere; material that could engulf someone; a shape that could trap or suffocate someone; or another recognized serious safety or health hazard. A normal air reading does not rule out a moving agitator, engulfment or a trapping shape.
The employer must evaluate the workplace, inform exposed workers about permit spaces and their dangers, and take effective measures to prevent unauthorized entry. If employees will enter, a written permit-space program is required unless a specific alternative applies. If employees will not enter, the employer still must prevent entry and meet the applicable remaining duties.
Entry occurs as soon as any part of the body crosses the plane of the opening into the permit space. Leaning a head or arm inside is not a harmless exception. Do not cross the opening to inspect, retrieve a tool or help someone without the required controls and authorization. Passing this course is not an entry permit or employer authorization.
Basis: 1910.146(a), (b), (c)(1)–(4)
2. Understand the hazards
By the end: Recognize atmospheric and physical hazards before entry.
Look at what the space contains, what used to be inside it, what connects to it and what the planned work could create. Cleaning chemicals, welding, nearby exhaust and incoming material can change conditions. A space that was safe yesterday may be dangerous today.
The standard defines hazardous oxygen levels as below 19.5 percent or above 23.5 percent by volume. Flammable gas, vapor or mist above 10 percent of its lower flammable limit is another hazardous-atmosphere condition. These are regulatory definitions, not permission to work at an alarm limit. The employer must set acceptable entry conditions for all hazards, which may be more restrictive.
Toxic substances may be dangerous even when oxygen and flammability readings look normal. Combustible dust and other immediately dangerous conditions also matter. A common four-gas meter does not detect every chemical. Neither smell nor the absence of symptoms proves that the atmosphere is safe.
Physical hazards include moving parts, stored energy, incoming liquids or solids, electrical hazards, heat, poor footing and walls or floors that can trap a person. Isolation and other controls must address each actual hazard. Opening a hatch or running a fan does not control moving equipment or material flow.
Entrants, attendants and supervisors must know how exposure can happen, its warning signs or symptoms, and its consequences. Confusion or unusual behavior can signal exposure. Do not wait for a worker to collapse. Alert the attendant and leave promptly when a warning sign, prohibited condition, evacuation order or alarm occurs.
Basis: 1910.146(b), (d)(2)–(3), (h)(1), (i)(1)–(2), (j)(1)
3. Prepare controls and equipment
By the end: Explain what must be in place before entry is authorized.
The written program must identify the people with active roles, their duties and the procedures for safe entry. It must prevent unauthorized entry, establish acceptable conditions, address rescue and control the issue and cancellation of permits. A form is only one part of the program.
Isolation protects the space from releases of energy and material. Depending on the system, methods include blanking or disconnecting lines, double block and bleed, hazardous-energy lockout or tagout, and blocking or disconnecting mechanical linkages. The employer selects and verifies methods suitable for the actual system. A stop button or verbal promise not to start equipment is not verified isolation.
Control atmospheric hazards using the methods required by the plan. Ventilation must use an appropriate clean source. Inerting with nitrogen may reduce flammability but creates an oxygen-deficient atmosphere that is immediately dangerous to life or health. It does not make a space breathable. Never use oxygen to freshen the air.
The employer must provide the necessary equipment at no cost to employees, maintain it and ensure proper use. This includes testing and monitoring, ventilation, communications, suitable PPE, lighting, barriers, safe access and rescue equipment, plus any other equipment needed for safe entry and rescue. Respirators require their own applicable program; this course does not qualify anyone to use them.
Under a permit entry, at least one attendant must remain outside for the duration of entry operations. Check that workers can enter and exit safely and that traffic, falling objects and other outside activity are controlled. Do not start while a required device, isolation, attendant or rescue arrangement is missing.
Basis: 1910.146(b), (d)(1)–(4), (d)(6)–(10)
4. Test and monitor the atmosphere
By the end: Explain testing order, equipment limits and worker participation.
Test conditions before authorizing entry and test or monitor during the work as needed to verify that acceptable conditions remain. A reading is tied to a place and time; it is not a guarantee for the whole shift. Use the actual plan to address changing conditions and the work being performed.
Test oxygen first, then combustible gases and vapors, then toxic gases and vapors. Some combustible-gas sensors depend on oxygen and can give misleading readings in oxygen-deficient air. A trained person must understand the instrument, sensors, alarms, sampling equipment, required checks and manufacturer instructions.
Evaluate all relevant hazards and use equipment with the needed sensitivity and specificity. Allow the instrument’s required response time and sampling-line transport time. Sample the areas where people will travel and work, considering layers and pockets. One quick sample at the opening does not establish conditions throughout a deep or complex space.
Entrants or their representatives must have an opportunity to observe pre-entry and later testing or monitoring and must receive results immediately. If they have reason to believe evaluation was inadequate, the employer must reevaluate the space in their presence upon request. Report concerns rather than entering to investigate them.
Where isolation is infeasible because a space is large or part of a continuous system, such as a sewer, the rule requires pre-entry testing to the extent feasible and continuous monitoring where entrants work if entry is authorized. This is a specific provision, not permission to skip testing. Other spaces still need monitoring suited to their hazards and procedures.
Basis: 1910.146(d)(5); Appendix B atmospheric-testing guidance
5. Read and use the entry permit
By the end: Identify the permit information and authorization needed for entry.
Before entry is authorized, the employer documents that the required preparations are complete. The named entry supervisor signs the permit before entry begins. Entrants must be able to see the completed permit at the entry point or through an equally effective method.
The permit identifies the space, purpose, date and authorized duration. It identifies entrants by name or an accurate tracking method, the current attendants and entry supervisor, and the signature or initials of the supervisor who originally authorized entry. A permit for another tank, task or time period cannot be borrowed.
It records hazards, isolation and hazard controls, acceptable entry conditions and initial and periodic test results. Test records include the tester’s name or initials and the time. Numbers without their units, locations or meaning cannot support a useful review; the site procedure must make results understandable.
The permit also identifies rescue and emergency services and how to summon them, entrant-attendant communication, required equipment and any other information needed for safety. Include additional permits, such as a hot-work permit, when applicable. A hot-work permit does not replace the confined-space permit.
The permit may last no longer than needed for its identified task. The supervisor terminates entry and cancels it when the operation is complete or a condition not allowed by the permit arises in or near the space. Do not erase an alarm or change a reading to keep work going. Preserve the problem for review and establish safe conditions before any later entry.
Basis: 1910.146(e), (f)
6. Perform the authorized entrant’s duties
By the end: Recognize entrant responsibilities for equipment, communication and exit.
An authorized entrant knows the space hazards and how exposure can occur, including warning signs, symptoms and consequences. Review the actual permit and role before crossing the opening. The employer must provide the training and skills needed for the assigned work, not just a course title.
Use the specified equipment properly. This includes monitoring, communications, protective equipment and any retrieval equipment required by the plan. Know its limitations and the actions required if it fails. Do not silence an alarm or change a setting to avoid interrupting work.
Keep contact with the attendant as needed so the attendant can monitor your status and tell you to leave. Agree on the communication method and evacuation signal before entry. If required communication cannot be maintained, follow the evacuation procedure rather than assuming the attendant can see or hear you.
Alert the attendant if you recognize a warning sign or symptom of a dangerous exposure or detect a prohibited condition. Exit as quickly as possible when the attendant or supervisor orders evacuation, you recognize such a warning sign or symptom, you detect a prohibited condition, or an evacuation alarm activates.
You do not need to finish the task, retrieve tools or obtain a second opinion before responding to an evacuation trigger. Tell the team what happened from a safe location. Do not reenter merely because the alarm has stopped; the employer must address the condition and authorize any subsequent entry through the applicable procedure.
Basis: 1910.146(h)
7. Perform the attendant’s duties
By the end: Maintain entrant protection without distraction or unauthorized rescue entry.
The attendant remains outside the space until relieved by another attendant. Maintain a continuously accurate count and identification of the authorized entrants. Communicate enough to monitor their status and alert them to leave. Know the hazards and possible behavioral effects of exposure.
Watch conditions both inside and outside. Order immediate evacuation if a prohibited condition is detected, an entrant shows behavioral effects of exposure, an outside situation threatens entrants, or you cannot safely and effectively perform all attendant duties. Summon rescue and emergency services as soon as entrants may need help to escape.
Warn unauthorized people to stay away. If they have entered, tell them to exit immediately and inform the authorized entrants and entry supervisor. Do not leave the station to chase someone or accept a task that interferes with monitoring and protecting entrants.
An attendant may monitor more than one space only when all duties can be performed effectively for each. The program must address emergencies without distracting the attendant from those duties. The number of spaces alone does not prove that the arrangement is safe.
Perform non-entry rescue only as specified by the employer’s rescue procedure. Do not climb in after a collapsed worker. The narrow allowance for an attendant to enter for rescue requires the program to permit it, the necessary rescue training and equipment, and relief by another attendant. This online course does not establish those conditions.
Basis: 1910.146(d)(6)–(7), (i)
8. Perform the entry supervisor’s duties
By the end: Verify entry readiness and maintain control through handover and closure.
The entry supervisor knows the hazards, exposure routes, signs or symptoms and consequences. Before authorizing entry, verify the permit entries, required tests, procedures and equipment. A completed-looking form is not a substitute for checking that preparations have actually been carried out.
Confirm that rescue services are available and that the method for summoning them works. A listed phone number alone does not establish a capable, timely rescue service. Resolve missing rescue coverage before authorizing entry.
Remove unauthorized individuals who enter or attempt to enter during operations using the employer’s safe procedures. Support the attendant’s warnings and keep access controlled. Do not solve unauthorized entry by sending another unprotected person inside.
When responsibility transfers, and at intervals dictated by the hazards and work, determine that operations still follow the permit and that acceptable entry conditions remain. A shift handover must transfer actual status, personnel, readings, controls and concerns, not just a signature.
Terminate entry and cancel the permit when required. A supervisor may also serve as entrant or attendant only if trained and equipped for each role and able to fulfill the duties. Combining titles cannot erase the need for an outside attendant or justify a task conflict.
Basis: 1910.146(j); (e)(5)
9. Plan rescue before entry
By the end: Explain rescue-service evaluation and non-entry retrieval requirements.
The employer must evaluate the rescue service’s ability to respond in time for the specific hazards and its proficiency with the needed tasks and equipment. Select a capable service, tell it the hazards, and give it access to the relevant spaces for planning and practice. Simply planning to call 911 during a collapse does not complete this evaluation.
Retrieval systems or methods must be used for permit entry unless they would increase the overall entry risk or would not contribute to rescue. The employer must evaluate that exception; inconvenience is not enough. Non-entry retrieval does not replace the need for a suitable emergency plan and service.
The rule specifies a chest or full-body harness and retrieval line attached to allow successful removal. The outside end attaches to a mechanical device or fixed point so rescue can begin promptly. For vertical permit spaces more than 5 feet deep, a mechanical retrieval device must be available. Wristlets are a limited alternative only when the employer demonstrates that a harness is infeasible or more hazardous and wristlets are the safest, most effective option.
Employees designated for rescue need the necessary PPE at no cost, proficiency in its use, training in assigned rescue duties and authorized-entrant proficiency. They also need basic first-aid and CPR training, with at least one currently certified first-aid/CPR member available. They must practice permit-space rescue at least once every 12 months using actual or representative spaces that match opening size, configuration and accessibility.
This is an explanation of rescue requirements, not technical rescue qualification or rigging instruction. Actual rescue training, equipment selection and safe practice remain separate. If an injured entrant was exposed to a substance with required safety data or similar written information, make that information available to the treating medical facility.
Basis: 1910.146(d)(9), (k); nonmandatory Appendix F
10. Distinguish alternate entry and reclassification
By the end: Explain why ventilation control is not hazard elimination.
Alternate procedures under paragraph (c)(5) apply only when the employer demonstrates that the only hazard is an actual or potential hazardous atmosphere and that continuous forced-air ventilation alone keeps entry safe. Monitoring and inspection data must support the decision and be available to entrants or their representatives. If an initial entry is needed to collect that evidence, full permit-entry requirements apply to that entry.
Before alternate entry, eliminate conditions that make opening the cover unsafe and promptly guard the opening against falls and objects. Test with a calibrated direct-reading instrument for oxygen, flammables and potential toxic contaminants in that order. Allow workers to observe. No hazardous atmosphere may exist while anyone is inside.
Ventilation must remove the hazardous atmosphere before entry, serve the work areas, use clean air and continue until everyone leaves. Test periodically as needed and allow observation. If a hazardous atmosphere develops, everyone leaves immediately; evaluate the cause and implement protection before another entry. Before entry, certify the date, space location and responsible person’s signature, and make that certification available.
Reclassification under paragraph (c)(7) is different. There must be no actual or potential atmospheric hazard, and all other hazards must be eliminated. If entry is needed to eliminate hazards, it must first follow the full permit requirements; testing and inspection must show elimination before reclassification. Ventilation that controls an atmospheric hazard does not eliminate that hazard for reclassification.
Document the basis for reclassification with the date, location and signature and make it available to entrants or representatives. It lasts only while hazards remain eliminated. If hazards arise, workers exit and the employer reevaluates. Changes in the use or configuration of any non-permit space that may increase hazards also require reevaluation. Workers cannot choose an exception merely because a job is brief.
Basis: 1910.146(c)(5)–(7)
11. Coordinate employers and learn from entries
By the end: Explain contractor coordination, permit retention and program review.
The host employer informs a contractor about permit spaces, known hazards, experience with the spaces, and protective precautions or procedures. Explain that entry requires a compliant permit-space program. A contractor’s training does not remove the host’s information-sharing duties.
The contractor obtains available information, coordinates with the host where their workers work in or near permit spaces, and tells the host the program it will follow and any hazards encountered or created. The host debriefs the contractor after entry. Simultaneous entries by different employers need procedures that keep one crew’s work from endangering another.
Consider actions outside the space. A nearby crew could send exhaust toward a ventilation intake, open a line or introduce a chemical. The coordination plan must identify who controls those activities and how changes are communicated. Do not assume a permit protects against work that was never discussed.
Retain canceled permits for at least one year and record problems on the relevant permit. Review the program using those permits within one year after each entry; a single annual review may cover the entries in a 12-month period. If there were no entries in that period, that periodic review is not required by this provision.
Do not wait for the periodic review when there is evidence that protection may be inadequate. Review and correct deficiencies before subsequent entries after events such as unauthorized entry, unexpected hazards, prohibited conditions, near misses or worker concerns. Consult affected employees and representatives on program development and implementation, and make the required information available to them.
Basis: 1910.146(c)(8)–(9), (d)(11)–(14), (e)(6), (l)
12. Verify training and workplace proficiency
By the end: Identify training triggers, certification records and remaining practical requirements.
Training must give affected employees the understanding, knowledge and skills to perform their assigned duties safely. Provide it before first assignment, before a change in duties, when operations introduce a hazard not previously covered, and when there is reason to believe procedures are being deviated from or knowledge or use is inadequate.
Training must establish proficiency and introduce new or revised procedures as needed. Use the actual spaces, tasks and equipment in a safe training arrangement. A worker who can answer a quiz but cannot use the required monitor, communicate or perform their assigned procedure still has a gap to correct.
The employer certifies completed training with each employee’s name, trainers’ signatures or initials and training dates. Make that certification available to employees and their representatives. Keep evidence of actual instruction and proficiency; do not fill a form from listening time or another worker’s record.
Paragraph (g) does not impose a universal annual refresher interval on every entrant, attendant and supervisor. Its event-based training triggers still apply. The separate at-least-every-12-month rescue-practice duty applies to designated employee rescuers. Program review, rescue practice and worker retraining are different requirements.
This course is the online knowledge component. Before assignment, the employer must complete site-specific instruction, establish role proficiency and confirm the program, controls, equipment, permits and rescue arrangements. The course does not grant entry authorization, respirator qualification or technical rescue competence. Correct gaps and reassess before relying on the worker in that role.
Basis: 1910.146(g), (k)(2)
Sources
- OSHA 1910.146 — mandatory general-industry standard
- Appendix B — atmospheric-testing procedures
- Appendix F — nonmandatory rescue-service evaluation guidance
Federal sources reviewed October 22, 2026. Confirm the actual work, jurisdiction and applicable additional requirements. OSHA guidance supports planning; it is distinguished from mandatory standard text.