Figure 2: Aromatic profile for the soil type comparison of microbial degradation of gasoline on: (A) agricultural soil, (B) residential soil, and (C) brownfield soil over (a) 0, (b) 2, (c) 7, (d) 15, and (e) 30 days. Peaks: (1) propylbenzene, (2) 3-ethyltoluene, (3) 4-ethyltoluene, (4) 1,3,5-trimethylbenzene, (5) 2- ethyltoluene, and (6) 1,2,4-trimethylbenzene.