During misfire cleanup, what is the procedure for misfired holes that involves both washing with water and primer placement?

• A. Washed with water and a new primer placed to reblast the hole
• B. Extract old primer with pliers
• C. Leave as-is
• D. Fill with water and ignore

Answer: (A)

Misfire cleanup is about safely addressing a hole that didn’t fire and getting it ready for a reliable next blast. Washing the hole with water removes debris and contaminants that can interfere with primer ignition, helping the primer sit properly. Placing a fresh primer then provides a reliable initiation for the reblast. This combination reduces the chance of another misfire and keeps the blasting sequence under control.

Removing the old primer with pliers and leaving the misfire as is aren’t considered safe or effective because they introduce risk and don’t ensure a reliable reinitiation. Filling with water and ignoring the hole doesn’t resolve the misfire and leaves a hazardous, unresolved condition.