A monitor cannot answer every question
A fictional safety review examines a task for which one instrument displayed an ordinary reading. The instrument record shows a limited set of sensors and a defined operating range. A worker concludes that the result proves no hazardous atmosphere could exist, even though the suspected substance is not one of the agents the instrument measures. The team has not established that sampling location and duration represent the intended task. No actual entry is authorized by this exercise, and no numerical alarm level or complete sampling procedure is supplied. The reviewer must explain what the measurement supports and which assumptions require an appropriate assessment before work proceeds.
1. Interpret the result.
Read the worked answer
The reading concerns the instrument capabilities and conditions recorded; it does not establish the absence of an agent outside those capabilities.
2. What needs review?
Read the worked answer
Review the suspected hazards, suitable methods, representative sampling and actual protective and entry arrangements through the competent process.