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Soil lithology, soil conditions, and conductivity profiles of the petroleum-contaminated site (VRP5). (A) Percentages of silt and clay, sand, and gravel. (B) Residual, free, and dissolved LNAPL phases; water saturation; and sampling locations for 16S rRNA gene libraries 5V, 5F, 5C, and 5S. The inverted triangle denotes the level of the groundwater table. (C) Levels of conductivity expressed in millisiemens per meter.
