What must be done with the readings from the rectifier check in an impressed current cathodic protection system?

• A. Email them to the supplier
• B. Post them on the corporate bulletin board
• C. Keep them only in memory
• D. Record them in the impressed current log

Answer: (D)

Documentation of rectifier readings in an impressed current cathodic protection system is essential. Recording the readings in the impressed current log creates a traceable history of current output and system performance over time, showing that the protected structure maintains its intended potential relative to the reference electrode. This log enables trending to catch drift, identify equipment degradation, and verify that protection criteria are still being met, which is crucial for maintenance planning and audits. Keeping a written record also provides accountability and a clear basis for any investigation or compliance review. While other options might share information, they do not provide a durable, auditable record or support ongoing monitoring, whereas a dedicated log does.