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. 2023 Nov 13;9(11):e21999. doi: 10.1016/j.heliyon.2023.e21999

Figure (15).

Figure (15)

(A) a soil sample from the heat exchanger washing site, (B) a soil sample surrounding the construction site of the refining unit (E10- Czech), (C) a soil sample surrounding the crude oil depot, (D) a random soil sample from the refinery AL-Daura (Baghdad -AL-Iraq).