Diesel fuel
Diesel fuel means a low sulfur fuel oil of grades 1-D or 2-D, as defined by the American Society for Testing and Materials standard ASTM D975-91, Standard Specification for Diesel Fuel Oils, grades 1-GT or 2-GT, as defined by ASTM D2880-90a, Standard Specification for Gas Turbine Fuel Oils, or grades 1 or 2, as defined by ASTM D396-90a, Standard Specification for Fuel Oils (incorporated by reference in 72.13).
Source
40 CFR § 72.2
Scoping language
The terms used in this part, in parts 73, 74, 75, 76, 77 and 78 of this chapter shall have the meanings set forth in the Act, including sections 302 and 402 of the Act, and in this section as follows: