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Prevent rescue deaths
Confined Space Entry in Power Plants
Most confined space deaths happen when people rush inside to help someone who is already trapped. AAAT3 builds a safe entry process by isolating the space, testing air and issuing permits before anyone steps into a boiler, condenser or vault.
- Permit-required confined spaces
- Boiler and tank entry
- Rescue planning first
- Air testing and ventilation
- Isolation control
By the numbers
Confined space death facts
Workers who died in confined spaces in the U.S. from 2011 to 2018
BLS fact sheetConfined space deaths from inhaling harmful substances, most often hydrogen sulfide, 2011 to 2018
BLS fact sheetShare of confined space deaths that are would-be rescuers
NIOSH Alert 86-110What’s included
Confined space entry from isolation to final check
We manage the full process so no one goes in until safety is absolute.
Isolation and hazard control
We lock out energy sources before any worker touches a valve or opens a cover.
- Lockout tags on all energy sources
- Verify power is off at the source
- Block fuel lines and gas supplies
- Confirm isolation with the owner
Air testing and ventilation
We measure oxygen and toxins before opening a single door or valve.
- Test for oxygen levels every hour
- Monitor hydrogen sulfide continuously
- Run mechanical fans to push air in
- Log test results on the permit
Permits and rescue ready
The entry permit and rescue plan are locked before anyone steps inside.
- Signed permit with all required info
- Rescue team and gear at the site
- Attendant stationed outside the space
- Emergency plan approved by management
Project management and consulting
Project management and consulting for confined space entry
AAAT3 manages your program to ensure isolation, testing and rescue plans are ready before any person enters.
Program development and plan review
We write the written program and review your procedures against 29 CFR 1910.146 and federal standards.
Best for: Utilities and EPC contractors starting new programsPre-entry isolation verification
We confirm all energy sources are locked out and isolated before anyone approaches the space.
Best for: Outage managers running power plant shutdownsRescue planning and equipment readiness checks
We verify that rescue teams and equipment are prepared so entry never begins without a plan.
Best for: Plant owners with limited on-site emergency resourcesPermit issuance training for supervisors
We train your staff to issue the permit correctly and ensure the attendant post is ready.
Best for: General contractors managing multiple subcontractorsAir testing and ventilation program oversight
We monitor that air testing and ventilation happen before entry starts under 29 CFR 1910.146 rules.
Best for: Substations and vault work teamsOn-site safety officer staffing
We deploy safety officers to oversee your entry operations throughout the outage or construction phase.
Best for: Federal projects requiring USACE CQM complianceHow it works
Six steps for safe entry
Isolate energy
Lock out and tag out all power sources.
Ventilate air
Force fresh air through the space.
Test atmosphere
Check for oxygen and toxic gases.
Issue permit
Sign the entry permit with all details.
Post attendant
Assign a dedicated person outside the space.
Ready rescue
Verify equipment and plan are available.
Rule of thumb: no entry happens until the rescue plan and rescue equipment are ready at the opening.
Ways to work with us
Pick the level of support you need
Start small with a review, put a qualified person on site, or hand us the whole program. Every option is priced to your scope.
Quick start
Permit review package
We check your plan for compliance with OSHA rules.
- Plan and form audit
- Isolation verification
- Ventilation review
- Risk summary report
Most popular
On-site support package
Our safety officer stays with you during the work.
- Permit issuance and closeout
- Daily air testing oversight
- Rescue plan verification
- Shift handover notes
Full program
Full program management package
We handle the entire safety process from start to finish.
- Training and certification
- Program development
- Equipment procurement
- Owner reporting
What you get
Deliverables
Entry permit form
Written request approved by the authorized person.
Attestation checklist
Sign off on isolation and air testing results.
Rescue plan document
Written method for rescue with equipment list.
Testing log sheet
Record oxygen levels and gas concentrations over time.
Site inspection report
Photos of hazards and fixes before entry begins.
Training records file
Names of trained entrants, attendants and rescuers.
Standards
Codes and standards we work to
Confined space
2- 29 CFR 1910.146
Permit-required confined spacesFederal
- 29 CFR 1926 Subpart AA
Confined spaces in constructionFederal
Energy control
2- 29 CFR 1910.147
Control of hazardous energyFederal
- 29 CFR 1910.269
Electric power generation, transmission and distributionFederal
Related services
More power generation services
Where we do this work
Protect your crew on outage or general construction. Get a quote for our confined space program today.
Get a Confined Space QuoteFAQ
Common questions
How do we isolate equipment before entering a boiler or tank?
We follow OSHA 29 CFR 1910.147 to lock out, tag out, and block all energy sources. We verify the system is dead before anyone goes in.
What air testing and ventilation steps must be done first?
You need continuous mechanical ventilation and gas monitoring for oxygen, flammability, and toxic gases like hydrogen sulfide. Testing starts at the top of the space and moves downward during entry.
When does the rescue plan need to be ready?
The full rescue plan and equipment must be on-site before a single person steps into the confined space. Entry never starts until this preparation is complete.
Can AAAT3 manage the confined space entry program for our utility project?
Yes. We provide safety officers, SSHOs, QC managers, and project managers who run the full program under OSHA 29 CFR 1910.146 and other standards.
What is required for a permit authorizing individual and attendant?
The authorized person must inspect the space, issue the permit, and post an attendant outside to monitor conditions. The attendant stays alert until entry is complete or cancelled.
Get a quote for Confined Space Entry in Power Plants
Tell us about your project, location and start date. We reply with a plan and pricing.
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