Emergency Response to a Gas Leak
You are called to a domestic property where the occupant reports a strong smell of gas in the hallway. On arrival, you park your van away from the property and approach on foot. You smell gas strongly outside. The occupant meets you at the door and says they have a headache and feel dizzy. There is a gas meter in a cupboard under the stairs. The property has a gas fire in the living room, a gas cooker in the kitchen, and a gas boiler in the loft. The occupant has not turned off the gas supply. You have a gas detector and tools. The weather is cold and the windows are closed. The occupant is elderly and reluctant to leave the property.
1. Outline the steps you would take to make the situation safe, including your own safety and the safety of the occupant.
Read the worked answer
First, ensure your own safety: do not enter the property if there is a strong smell of gas; call the emergency services (gas emergency number) immediately. Do not operate any electrical switches, including light switches, doorbells, or mobile phones inside the property. Evacuate the occupant and any other persons from the property to a safe distance. If the occupant is reluctant, explain the danger and assist them. Do not re-enter the property until it is safe. If you can safely access the gas meter without entering, turn off the gas supply at the meter. However, if the smell is strong, it may be unsafe to enter. Use a gas detector to assess the atmosphere. If you can safely enter, open doors and windows to ventilate, but avoid creating sparks. Do not use naked flames. Once the gas is turned off, check for the source of the leak using a gas detector or leak detection fluid on joints. If the leak is on the installation, isolate the affected section. If the leak is on the meter or service pipe, contact the gas transporter. After the leak is repaired, purge and relight appliances, and test for soundness. Document everything.
2. What are the potential health effects of the gas exposure, and what advice would you give to the occupant?
Read the worked answer
The occupant reports headache and dizziness, which are symptoms of carbon monoxide (CO) poisoning, not just natural gas exposure. Natural gas itself is not toxic, but it can cause asphyxiation by displacing oxygen. However, the symptoms suggest CO may be present, possibly from a faulty appliance. You should treat this as a potential CO incident. Advise the occupant to seek medical attention immediately, even if symptoms seem mild. Call the emergency services and explain the symptoms. Do not allow the occupant to re-enter the property until it has been declared safe by a competent person. After the incident, conduct a full inspection of all gas appliances for CO production, including combustion analysis. Provide CO awareness information and advise the installation of CO alarms. Also, advise the occupant on the importance of regular servicing and ventilation. Follow up to ensure the cause is rectified.