This graph shows a comparison of the concentrations of PFOS and substances in POFOA group from groundwater leaking of municipal landfill leachate and landfill industrial in the downstream point of sample collection points, three points are as follows: 1.Phanom Sarakham District,Chachoegsao province 2Kamphaeng Saen District, Nakhon Pathom province 3. Preaksamai Sub-District ,Mueang Samut Prakan District,Samut Prakan province
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