advanced work · Utility vault, Cleveland OH
Confined-space entry pre-screen — utility vault, Cleveland (2026-07-21)
A crew is preparing to enter a below-grade utility vault in Cleveland without documented atmospheric testing, permit, or rescue plan. Standard: OSHA 29 CFR 1926 Subpart AA — Confined Spaces in Construction (§§1926.1200–1213) Proof: photo from outside per checklist section + GPS + Subpart AA checklist + permit/atmospheric-log/attendant/rescue status + tiered findings routed to the entry supervisor Method (OSHA 29 CFR 1926 Subpart AA (Confined Spaces in Construction, §§1926.1200–1213) entry pre-screen — outside-the-space observation only, ~45-90 min): 1. Check in with the entry supervisor; confirm scope, don site PPE, and confirm you observe-and-document from OUTSIDE the space only — you never enter, never perform in-space atmospheric testing, and never authorize entry (Subpart AA reserves these for the entry supervisor / authorized entrant). 2. Classify the space with the entry supervisor: permit-required (a potential hazardous atmosphere, engulfment, entrapment/converging walls, or another serious hazard) or non-permit; photograph the space from outside and record the classification (§1926.1203). 3. For a permit-required space, confirm a completed entry permit is posted: authorized entrant(s), attendant, and entry supervisor named; hazards, controls, acceptable entry conditions, and permit duration recorded (§1926.1206). 4. Document the atmospheric-testing log: pre-entry and continuous readings for oxygen (19.5–23.5%), flammables (<10% LEL), and toxics (e.g., H2S, CO); confirm a calibrated meter and who performed the test — you record the log, you never test inside the space (§1926.1204). 5. Confirm the attendant is stationed outside with continuous entrant communication, and that a rescue plan / non-entry retrieval (harness + lifeline) plus an emergency-service arrangement is in place (§§1926.1209–1211). 6. For each finding, mark the condition against the Subpart AA checklist item, assign a tier (stop-work / correct-before-proceed / monitor), and name the responsible entry supervisor. 7. Enter photos (from outside), GPS/address, the checklist, the permit + atmospheric-log status, and the tiered findings; sign. Route stop-work items to the entry supervisor with a timestamp — never enter or authorize entry. Equipment: hard hat + safety glasses + hi-vis vest (site PPE), tablet/clipboard with the OSHA 1926 Subpart AA entry-permit pre-screen checklist, camera, tape measure, flashlight, stand-back / cordon reference to keep clear of the opening Done when: Space classified (permit-required vs non-permit) with the entry supervisor and photographed from outside; Entry-permit status documented for a permit-required space (entrant / attendant / entry supervisor named, hazards + acceptable conditions + duration); Atmospheric-testing log status recorded (O2 / LEL / toxics, pre-entry + continuous, calibrated meter, tester named); Attendant + rescue/retrieval + emergency-service arrangement confirmed; every finding tiered with the entry supervisor named and stop-work items routed with a timestamp
How this work is done
A documented method, so this packet comes out the same whoever does it. Typically 45–90 minutes. Method of record: OSHA 29 CFR 1926 Subpart AA (Confined Spaces in Construction, §§1926.1200–1213) entry pre-screen — outside-the-space observation only
Bring
- hard hat + safety glasses + hi-vis vest (site PPE)
- tablet/clipboard with the OSHA 1926 Subpart AA entry-permit pre-screen checklist
- camera
- tape measure
- flashlight
- stand-back / cordon reference to keep clear of the opening
Steps
- 1. Check in with the entry supervisor; confirm scope, don site PPE, and confirm you observe-and-document from OUTSIDE the space only — you never enter, never perform in-space atmospheric testing, and never authorize entry (Subpart AA reserves these for the entry supervisor / authorized entrant).
- 2. Classify the space with the entry supervisor: permit-required (a potential hazardous atmosphere, engulfment, entrapment/converging walls, or another serious hazard) or non-permit; photograph the space from outside and record the classification (§1926.1203).
- 3. For a permit-required space, confirm a completed entry permit is posted: authorized entrant(s), attendant, and entry supervisor named; hazards, controls, acceptable entry conditions, and permit duration recorded (§1926.1206).
- 4. Document the atmospheric-testing log: pre-entry and continuous readings for oxygen (19.5–23.5%), flammables (<10% LEL), and toxics (e.g., H2S, CO); confirm a calibrated meter and who performed the test — you record the log, you never test inside the space (§1926.1204).
- 5. Confirm the attendant is stationed outside with continuous entrant communication, and that a rescue plan / non-entry retrieval (harness + lifeline) plus an emergency-service arrangement is in place (§§1926.1209–1211).
- 6. For each finding, mark the condition against the Subpart AA checklist item, assign a tier (stop-work / correct-before-proceed / monitor), and name the responsible entry supervisor.
- 7. Enter photos (from outside), GPS/address, the checklist, the permit + atmospheric-log status, and the tiered findings; sign. Route stop-work items to the entry supervisor with a timestamp — never enter or authorize entry.
If it does not match the plan
- A permit-required space entered or about to be entered with no completed entry permit, or with no pre-entry atmospheric test -> STOP-WORK: document, keep all persons out of the space, route to the entry supervisor; never enter.
- Atmospheric readings outside acceptable limits (O2 <19.5% or >23.5%, LEL >=10%, or toxics above the PEL), or continuous monitoring not in place -> STOP-WORK; keep out; route to the entry supervisor / a qualified industrial hygienist; never enter to re-test.
- No attendant stationed outside, or no rescue/non-entry-retrieval plan and emergency-service arrangement for a permit space -> flag stop-work to the entry supervisor before any entry.
- Any entry, in-space atmospheric testing, ventilation setup, or rescue -> observe-and-document only; the entry supervisor / authorized entrant / trained rescue team performs and approves these. Approval and correction stay human.
What counts as done
- Space classified (permit-required vs non-permit) with the entry supervisor and photographed from outside
- Entry-permit status documented for a permit-required space (entrant / attendant / entry supervisor named, hazards + acceptable conditions + duration)
- Atmospheric-testing log status recorded (O2 / LEL / toxics, pre-entry + continuous, calibrated meter, tester named)
- Attendant + rescue/retrieval + emergency-service arrangement confirmed; every finding tiered with the entry supervisor named and stop-work items routed with a timestamp
Proof is measured against these, not judged by taste.
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