Confined Space Gas Testing Checklist

Use this Confined Space Gas Testing Checklist to confirm proper gas monitoring, ensuring air quality is safe by checking oxygen levels and flammable gases.

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Health & Safety
Confined Space Gas Testing Checklist

Equipment Preparation & Calibration

Pre-Entry Testing Procedures

Atmospheric Safety Thresholds

Continuous Monitoring & Re-Testing

Emergency Response

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Checklist by GoAudits.com – Please note that this checklist is intended as an example. We do not guarantee compliance with the laws applicable to your territory or industry. You should seek professional advice to determine how this checklist should be adapted to your workplace or jurisdiction.

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Confined Space Gas Testing Checklist

Use this Confined Space Gas Testing Checklist to confirm proper gas monitoring, ensuring air quality is safe by checking oxygen levels and flammable gases.

1. Has the gas monitor been calibrated according to the manufacturer's specifications within the required timeframe?

2. Has a "bump test" been successfully performed today to ensure the sensors and alarms are functioning correctly?

3. Is the battery fully charged for the duration of the planned work shift?

4. Is the sampling pump and associated tubing/probes free of leaks and blockages?

5. Has the monitor been zeroed in a known clean-air environment before beginning the test?

1. Are the ventilation systems turned off temporarily during the initial test to ensure a "worst-case" snapshot of the atmosphere?

2. Is the testing performed in the specific order of Oxygen (O2) first, followed by Flammability (LEL), and then Toxics?

3. Has the atmosphere been sampled at multiple levels (top, middle, and bottom) to account for gases that are heavier or lighter than air?

4. Has sufficient response time been allowed for the monitor to draw air through the tubing and provide an accurate reading?

1. Is the Oxygen concentration confirmed to be within the safe range of 19.5% to 23.5%?

2. Is the Flammable gas level recorded at less than 10% of the Lower Explosive Limit (LEL)?

3. Is the Carbon Monoxide (CO) level below the permissible exposure limit (typically 25-30 ppm)?

4. Is the Hydrogen Sulfide (H2S) level below the permissible exposure limit (typically 5-10 ppm)?

5. Have any other site-specific toxic gases (e.g., SO2, NH3, Cl2) been tested and found within safe limits?

1. Is continuous monitoring established for the duration of the entry, especially if the atmosphere has the potential to change?

2. Are the monitors positioned in the immediate breathing zone of the entrants?

3. Is a re-test scheduled if the space is vacated for a significant break (e.g., lunch) or if the ventilation is altered?

4. Have all test results (time, location, and specific readings) been documented on the entry permit?

1. Is the entrant instructed to evacuate immediately if any gas alarm (low-level or high-level) is triggered?

2. Is there a clear protocol to re-ventilate and re-test the space if hazardous levels are detected?