A professional who tends tanks that impregnate asbestos lining stock with asphalt solution. Respnsibilities include:

• Loads vacuum tank with rolls of asbestos lining, using hoist.
• Turns valves to admit specified quantities of asphalt solution into tank.
• Turns steam valves to heat tanks, observes temperature control chart, and adjusts coolant valves to maintain temperature within specified limits.
• Transfers impregnated rolls of asbestos from tank to oven, using hoist.
• Allows material to heat for specified time to complete impregnating process.
• Starts blower to dry and exhaust fumes from asbestos.
• May standardize width and thickness of asbestos lining.
• May test impregnated stock to ensure conformance to specifications, using brake-testing machine.
• May deliver samples to control laboratory.
• May tend mixing machine to prepare impregnating solution.