House Energy and Commerce Committee ranking member Henry Waxman (D-CA), Oversight and Investigations Subcommittee ranking member Diana DeGette (D-CO), and Natural Resources Committee ranking member Ed Markey (D-MA) sent a letter October 25 to Environmental Protection Agency Administrator Lisa Jackson increasing their initial findings on the use of diesel as hydraulic fracturing fluids. The letter asserts that oil and gas companies injected 32.7 million gallons of diesel into gas wells in 20 states during a five year period; and increase from the 32.2 million gallons in 19 states reported in January.