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Tanks abandoned in place shall be as follows:
  1. Flammable and combustible liquids shall be removed from the tank and connected piping.
  2. The suction, inlet, gauge, vapor return and vapor lines shall be disconnected.
  3. The tank shall be filled completely with an approved inert solid material.
  4. Remaining underground piping shall be capped or plugged.
  5. A record of tank size, location and date of abandonment shall be retained.
  6. All exterior above-grade fill piping shall be permanently removed when tanks are abandoned or removed.

Related Code Sections

5704.2.14.1 Flammable and Combustible Liquids, Removal
the ground. Exception: Piping is allowed to be abandoned in place where the fire code official determines that removal is not practical. Abandoned piping ...