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5704.1.2 Tank capacity limitations.
Except at a bulk plant or terminal or as otherwise specified in this chapter, the capacity of flammable and combustible liquid storage tanks shall not exceed the amounts set forth in FC 5704.1.2.1 through 5704.1.2.4.
5704.1.2.1 Underground flammable liquid tanks.
Individual underground flammable liquid storage tanks shall not exceed a capacity of 4,000 gallons (15 140 L). The aggregate capacity of underground flammable liquid storage tanks at a premises shall not exceed 20,000 gallons (75 700 L).
5704.1.2.2 Underground combustible liquid tanks.
Individual underground combustible liquid storage tanks shall not exceed a capacity of 12,000 gallons (45 420 L). The aggregate capacity of underground combustible liquid storage tanks at a premises shall not exceed 40,000 gallons (151 400 L).
5704.1.2.3 Aboveground, outdoor combustible liquid tanks.
The aggregate capacity of aboveground combustible liquid tanks installed outdoors at a premises shall not exceed 30,000 gallons (113 550 L).
5704.1.2.4 Aboveground, indoor combustible liquid tanks.
The aggregate capacity of aboveground combustible liquid tanks installed indoors shall not exceed 20,000 gallons (75 700 L).
5704.2 Tank storage.
The provisions of this section shall apply to:
1. The storage of flammable liquids in stationary aboveground tanks located outdoors and underground tanks.
2. The storage of combustible liquids in stationary aboveground tanks indoors and outdoors, and underground tanks.
3. Existing storage tank installations at bulk plants and terminals which have not been used for the storage of flammable or combustible liquids for a period in excess of 2 years from the date of completion of construction of the tank structure, if the tank is to be placed in service.
5704.2.1 Change of tank contents.
Tanks that will be undergoing a change in contents shall comply with the design and installation requirements applicable to the type of flammable or combustible liquid with which it is proposed to be filled in accordance with this chapter, including FC 5704.2.7. Prior to a change in contents, notification shall be made to the department, which may require submission of design and installation documents, testing of a tank for leaks, and/or documentation of compatibility. Tanks that have previously contained Class I liquids shall not be filled with Class II or Class III liquids until such tanks and all piping, pumps, hoses and meters connected thereto have been completely drained and flushed. Tanks that previously contained combustible motor fuel may be used for biodiesel motor fuel as set forth in FC 2307. Approval of the department shall be required for a change in contents to biodiesel only if the biofuel content exceeds 20 percent.
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