Safety Manual | 2022

Gas Detection Only the Qualified Gas Tester will perform the atmospheric testing. All testing will be performed using equipment such as an LEL/O2 meter that measures combustible gas as a percentage of the lower explosive limit (“ LEL ”) and oxygen (O2) as a percentage of total atmospheric composition. Meters will be calibrated and/or tested immediately prior to use per the manufacturer’s recommendations and at least daily during hot work operations. Combustible gas and oxygen test readings must be documented and recorded on the hot work permit at the frequency required by the permit. If the LEL readings are acceptable, (< 10% LEL), a hot work permit may be issued. If hot work is to be performed within a confined space, the LEL must be 0% and the oxygen content must be greater than 19.5% and less than 23.5%. If 0% LEL cannot be obtained, an analysis of the factors affecting the LEL must be performed and written control measures developed that maintain the LEL at or below 10% before proceeding with the hot work.

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Section 8 // safety practices & procedures //