As part of the installation of the waste transfer line and repair of the cathodic protection line, a Holiday test was performed by QC personnel. The test determined that a ground condition existed on the underside of a pipe/clam shell. In order to determine the exact repair location, an electrician obtained a small mirror with an extendable handle to look into the tight space. As the mirror approached the Holiday detector probe, an electrical arc was generated between the probe and the mirror - and the electrician felt a sharp pain in his palm/wrist. The employee was evaluated and returned to work with no restrictions.
Lessons Learned: Manufacturers operating instructions should not be relied upon as a sole source of safety related warnings or recommendations regarding equipment operation. Always include Subject Matter Experts in Job Hazard Analyses.
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