What is the first step to take after encountering higher concentrations of methane?

In a situation where higher concentrations of methane are detected, the foremost action should be to ensure that the equipment used for measurement is providing accurate readings. This is why calibrating your detector is essential; a properly calibrated detector will ensure that any subsequent decisions made regarding safety are based on reliable readings. Detecting methane is critical because it is a flammable gas, and accurate detection is necessary to assess the risk level accurately.

If the readings are confirmed to be high after calibration, then further steps such as notifying supervisors, evacuating personnel, or stopping operations would most certainly follow. Calibration ensures that any action taken thereafter is justified, reducing the chance of misinterpretation of the threat or unsafe conditions. Thus, starting with calibration ensures that responses to potential hazards like methane are based on solid data.