John,
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Call it a "motor fuel dispensing facility," and those rules apply.

While Article 514 will apply, there will be no classified areas.
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514.3 Classification of Locations
(A) Unclassified Locations Where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flash point below 38°C (100°F), such as gasoline, will not be handled, such location shall not be required to be classified.

Diesel has a flash point above 38°C.
Don

Don(resqcapt19)