This paper describes a case study of an oil spill into Canal Ste-Anne-de-Bellevue, Quebec in 2002. In response to this specific oil identification need, a lab spill simulation was designed to obtain simulated spill samples from the suspected source samples. The integrated multi-criterion approach using GC/MS and GC/FID was then applied for fingerprinting and identifying the spill oil samples. The distribution patterns of hydrocarbons in the spill and suspected source samples were recognized and compared. Analysis of oil-characteristic biomarkers and the extended suite of parent and alkylated polycyclic aromatic hydrocarbons (PAH) were performed. A variety of diagnostic ratios of “source-specific marker” compounds for interpreting chemical fingerprinting data were determined and analyzed. Finally, the major components in suspected source samples were identified. The detailed chemical characterization data highlight that: (1) the spilled oil 264 is diesel fuel, while the suspected source sample 265 is an emulsified Bunker C type fuel; (2) another suspected source sample 266 is a de greaser-type “pine oil” product; (3) the synthetic spill sample from 265 and 266 has a completely different GC profile and chemical composition from the spill sample 264. No component of sample 266 was found and recognized in sample 264.

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