Hourly Gas Readings on a Six-Hour Wet-Well Entry
During an ISO 45001 audit of a municipal wastewater treatment plant, you review 22 confined-space entry permits issued over the past six months. The site procedure requires continuous atmospheric monitoring for permit-required spaces, with alarms at 10% LEL and 10 ppm hydrogen sulfide. One permit for a six-hour entry into a wet well records gas readings hourly - six sets of numbers - although the instrument log shows a calibrated four-gas meter was issued for the job. The entrant signed the permit; the attendant's signature for the final two hours appears to be in the same handwriting as the entrant's. The entry was five weeks ago and no incident occurred. The supervisor says, 'the meter would have alarmed anyway.' The attached rescue plan is a one-page sheet naming the municipal fire department, with no response time, no confirmation of fire department training, and no on-site retrieval equipment listed.
1. Is hourly testing a nonconformity? State the criteria and avoid overstating the law.
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Yes, against the site's own procedure, which requires continuous monitoring for permit-required spaces. ISO 45001 clause 8.1 requires the organization to control processes according to criteria, and the permit is the operational control. The regulatory analysis needs care: OSHA 29 CFR 1910.146 requires pre-entry testing with a calibrated instrument and monitoring as necessary to maintain acceptable entry conditions; it does not universally mandate continuous monitoring for every space. But here the site's hazard assessment and procedure set continuous monitoring as the control, and a six-hour wet-well entry can produce transient hydrogen sulfide spikes that hourly readings would miss. So I would write the finding against the procedure and against the effectiveness of the control, and note that a regulatory citation may also apply if the space's hazard evaluation required continuous monitoring. I would not tell the client it is definitely an OSHA violation without checking the applicable standard and the permit. I would also check whether the meter's datalogging was downloaded - that could confirm whether continuous monitoring actually occurred despite the paper record.
2. How do you handle the signature and rescue-plan issues before the closing meeting?
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The signature issue is potentially falsification, so it takes priority. I would preserve the original permit, compare the handwriting with other permits, and interview the entrant and attendant separately, along with the shift supervisor and any coworker who can confirm whether the attendant was at the portal. I would also check access logs and the entrant's timesheet. If the attendant was not present, this is not just a record error; it is a failure of a critical safety control, and I would notify top management immediately. For the rescue plan, I would audit against 1910.146(d)(9) and (k): the employer must evaluate rescue and provide a means of rescue; a generic sheet naming the fire department is inadequate unless the fire department has confirmed capability and response time. I would ask the client to verify that in writing with the fire department. Until then, I would recommend suspending permit-required entries at that wet well. If an entry is underway during the audit with no attendant or no adequate rescue, I would ask management to stop work. I would not wait for the closing meeting on either issue.