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§ 75.1901(a) Diesel-powered equipment shall be used underground only with a diesel fuel having a sulfur content no greater than 0.05 percent and a flash point of 100 deg. F (38 deg. C) or greater.

Sulfur Content in Diesel Fuel

On August 6, 1997, Program Information Bulletin (PIB) 97-17 was issued. This bulletin's subject matter is Determination of Diesel Fuel Sulfur Content.