A professional who operates cracking (recovery) unit of lead pots and condensers to vaporize and condense scrap plastics materials and recover monomer. Respnsibilities include:

• Unbolts and removes side covers from lead pot, using handtools, and charges it with lead pigs.
• Adjusts controls of oil burner to melt lead at specified temperature.
• Sets pressure regulators to supply specified quantity of carbon dioxide to lead pot to eliminate formation of explosive mixture and observes process to detect leaks.
• Turns screw feed controls to regulate flow of scrap materials into molten lead.
• Adjusts controls on condensers which automatically recover monomer from solvent and pumps cracked monomer to storage tanks.
• Dismantles lead pot.
• Drains lead into molds.