Samut prakan is representative of industrial waste. Point 1 and point 2 I found the substance in a group of Perfluorooctanoic acid (PFOA) or most C8S concentrations 1.27362 ng/L and concentrations 18.926908 ng/L, respectively. Drinking water benchmarks C8s (PFOS) < 300 ng/L (MDH 2011), < 200 ng/L (EPA 2013a, 2009d)
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