Underground tanks not used for a period of 90 days shall be safeguarded in accordance with all the following or be removed in accordance with Section 3404.2.14:
- Flammable or combustible liquids shall be removed from the tank.
- All piping, including fill line, gauge opening, vapor return and pump connection, shall be capped or plugged and secured from tampering.
- Vent lines shall remain open and be maintained in accordance with Sections 3404.2.7.3 and 3404.2.7.4.
Except for heating oil tanks, tanks abandoned in place shall be as follows:
- Flammable and combustible liquids shall be removed from the tank and connected piping.
- The suction, inlet, gauge, vapor return and vapor lines shall be disconnected.
- The tank shall be filled completely with an approved inert solid material.
- Remaining underground piping shall be capped or plugged.
- A record of tank size, location and date of abandonment shall be retained.
- All exterior above-grade fill piping shall be permanently removed when tanks are abandoned or removed.
Tanks which are to be reinstalled for flammable or combustible liquid service shall be in accordance with this chapter, ASME Boiler and Pressure Vessel Code (Section VIII), API 12-P, API 1615, UL 58 and UL 1316.
Heating oil storage tanks abandoned in place shall be abandoned as follows:
- The entire contents of the tank and related piping shall be emptied, cleaned and purged of all vapor. The contents of the storage tank and related piping shall be removed from the premises or property and disposed of in accordance with applicable local, state or federal rules and regulations.
- The vent line shall remain open and intact, unless the tank is filled with an inert material. The oil fill pipe and other related piping shall either be removed, or the oil fill pipe shall be filled with concrete.
- An approved inspector shall cause an inspection to be made of the abandoned tank to determine conformity with this section, provided that the local government official may waive such inspection for good cause.
Above-ground tanks not used for a period of 30 days shall be safeguarded in accordance with Section 3404.2.13.1.2 or removed in accordance with Section 3404.2.14.
- Tanks and containers connected to oil burners that are not in use during the warm season of the year or are used as a backup heating system to gas.
- In-place, active fire protection (foam) system lines.
The abandonment or removal of heating oil storage tanks and related piping in connection with the conversion of liquid fuel burning appliance to alternative fuel shall be in accordance with this section.
The entire contents of the heating oil storage tank and related piping shall be emptied, cleaned and purged of all vapor. The contents of the storage tank and related piping shall be removed from the premises or property and disposed of in accordance with applicable local, state or federal rules and regulations.