Gas chromatograms showing the biodegradation of diesel fuel by the bacterial consortium. Chromatograms of the start of the incubation period (A), abiotic control after 4 days (B), and with bacteria after 4 days (C). The peaks of n-alkanes (C13 to C22), pristane (Pr; 2,6,10,14-tetramethylpentadecane), and phytane (Ph; 2,6,10,14-tetramethylhexadecane) are indicated.