CODE: 550.682-014Buy the DOT:Download/CD-ROM
TITLE(s): TANNING-SOLUTION MAKER (chemical)

Controls series of vats that boil tanbark, quebracho, chemicals, and water to prepare tanning solution: Weighs specified amounts of materials on scale and dumps them into vat. Opens valves to admit water and steam into vat. Adjusts steam valve to maintain solution at specified temperature. Tests sample of solution for specific gravity, using hydrometer. Adds materials to solution to obtain solution of specified gravity. Starts pump to transfer solution from vat to storage tank. May grind bark or wood, using grinding machine.
GOE: 06.04.11 STRENGTH: M GED: R3 M1 L2 SVP: 5 DLU: 77
ONET CROSSWALK: 92965 Crushing, Grinding, Mixing, and Blending Machine Operators and Tenders