DOW Caustic Soda Solution

Empty Tank Car Confirmation

  1. Open vent valve to equalize pressure. Use caution, wear proper PPE, open away from face.
  2. Open dome cover.
  3. Visually confirm the residue caustic soda solution forms a liquid heel of no more than 1-foot wide.
  4. Prepare the empty tank car for return to Dow. See Empty Tank Car Return for more information. If more than a 12-inch wide heel is found, then additional caustic soda solution removal is required.

    NOTE: If a light is used for inspection, it should be explosion-proof rated due to the possibility that an explosive mixture of hydrogen and oxygen may be present in the car. DC powered lighting is recommended. To protect the light from falling into the tank car during the inspection, attach a rope or other means of retrieval to the light.