A professional who removes tar, pitch, and carbon accumulated in coke-collecting mains, using chisel bar. Respnsibilities include:

• Lifts plugs from collecting main, using hook.
• Places disk over plughole and shoves chisel bar through center hole of disk.
• Twists bar to pry tar from walls of main.
• Removes tar and pitch from traps, using spooning bar.
• Sweeps and cleans area.
• Cleans spray nozzles of collecting mains, using wire-cleaning tool.
• May apply steam to loosen residue from walls of collecting mains.