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. Author manuscript; available in PMC: 2021 Jun 10.
Published in final edited form as: Sci Total Environ. 2019 Jul 11;691:528–537. doi: 10.1016/j.scitotenv.2019.07.114

Fig. 4.

Fig. 4.

PAH diagnostic ratio plot of BaA/(BaA + Chr). Standard deviation of the mean is presented. n=127, 86, 189, and 402 for the Gulf, Eastern, Southwest and Combined regions, respectively. C: Combustion; M: Mixed Sources; P: Petroleum.