Local Exhaust Needs an Operator Check

Understand the hazard

Focus: Ventilation.

A running fan does not prove that an exhaust hood captures contamination at the tank. Damaged ductwork, blocked slots, an open door, or a misplaced rack can change airflow. The operator's check is an early warning within the ventilation program. It does not replace the scheduled technical inspection or performance assessment.

Use the controls

Use the site's specified airflow indicator or other approved check. Compare it with the posted acceptable condition and record the result when required. Keep hood openings clear and report corrosion, disconnected ducting, or a changed sound. Do not use a flame or release a chemical to test capture. Leave measurements and adjustments outside your authorization to qualified personnel.

Stop, report, and verify

When the check fails, follow the affected process's safe stopping instruction and notify the lead. Do not increase the fan setting, remove a guard, or continue because the room smells normal. The restart decision needs confirmation that the problem is corrected and required controls work. Include ventilation status in the shift handoff if the line remains stopped.

Discuss with the team

The fan can be heard, but the airflow indicator is outside its approved range.

Question: Which observation controls the operating decision?
Answer guidance: The approved check and response procedure, not fan noise or odor.

Question: Who may change ventilation settings?
Answer guidance: The people authorized under the ventilation program, after evaluating the change.

Prepare, practice, and follow up

Leader preparation: Bring the current instruction for ventilation, the relevant site checklist, and clean demonstration materials. Confirm the assigned lead and local stop-work response before presenting.

Activity: Read a demonstration airflow indicator and explain the action for a failed check.

Follow-up: Observe the next applicable task and verify this practice: read a demonstration airflow indicator and explain the action for a failed check. Record any gap, responsible person, and completion check before repeating the task.

Official reference: OSHA 29 CFR 1910.124 - Dipping and coating operations
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.124

Awareness briefing: apply site-specific procedures and current applicable requirements. This talk does not replace required training, qualification, exposure assessment, or a written safety program.

Suggested session: 4-6 minutes, including discussion and activity. Prepared October 18, 2026; verify current requirements before use.

Show the crew

Read a demonstration airflow indicator and explain the action for a failed check.