A professional who tends open tank to impregnate wood products with preservatives. Respnsibilities include:

• Signals overhead crane operator to lift load of material over tank and guides load into tank by hand or with rod, working from elevated platform.
• Chains tank loads of poles to high rack to prevent toppling.
• Observes gauges and turns valves to regulate heat and flow of preserving solution in tank.
• Impregnates sashes, doors, and other millwork products, using hand or power hoist to load and unload tank.
• May tend vacuum-type dip tank that impregnates wood by pressure.