Parts Per Million
An inspector uses an infrared gas detector to check for leaks on the Columbia Gas meters and systems in Uptown Westerville Wednesday afternoon. as part of a normal system of checking the integrity of fittings in the pipeline.
Any leaks discovered using the electronic sensor are verified with a visual inspection using a soapy liquid over the suspect leak. This leak, below, was marked at 40 parts per million and cataloged for a repair crew inspection.
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A photo gallery of the inspection process is included below for paid subscribers.