Job Description:

• 1) Operates one or more mixing machines to combine tar, asbestos fiber, asphalt, or similar ingredients to make roof coating and cement: Starts mixing machine and pump and opens line valve to admit asphalt into mixing machine.

• 2) Observes indicator or measuring stick and stops asphalt flow when specified amount has entered mixing machine.

• 3) Dumps specified ingredients through well into mixing tank or starts conveyor and dumps ingredients onto conveyor leading to mixing machine.

• 4) Reads ammeter to determine consistency of mixture and adds materials as needed, or visually determines when mixture has attained consistency and stops mixing machine.

• 5) Draws off sample of mixture for laboratory testing.

• 6) Turns lock bolts to open lines between mixing tank and storage tank, using wrench.

• 7) Keeps record of batch made, including deviations from written formula.