The U.S. Environmental Protection Agency (EPA) has released draft guidance on using diesel fuels during the hydraulic fracturing of oil and gas wells. Issued May 4, 2012, the draft guidance defines “diesel fuels” as a variety of petroleum distillates having the same or similar hydrocarbon contents, including automotive diesel fuels, marine diesel fuels, heating oil, kerosene, No. 4 fuel oil, and a distillate sometimes called Aruba gas oil.  

Noting that EPA considered a number of alternative descriptions of diesel fuels, the draft guidance includes technical details for permitting, such as recommendations for a limited duration underground injection control Class 2 injection well permit that would last only as long as fracturing is conducted. EPA will accept comments on the draft guidance for 60 days after publication in the Federal Register. See EPA Press Release, May 4, 2012.