Research Article

Distribution and Fractional Composition of Petroleum Hydrocarbons in Roadside Soils

Figure 4

Biplot of PCA results after -transformation; TPH: total petroleum hydrocarbons, Pu: Pushkinskaya street, Tr: Traktorostroiteley avenue, and M18: highway; letters A and B denote sampling windward and leeward sides, respectively.
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