Article 3 the underground water quality in accordance with article 2, use a standard method for the analysis of water and wastewater (Standard Methods for the Examination of Water and Wastewater), American Public Health Association, American Water Works Association and the Water Environment Federation of the United States jointly or by the water and waste water analysis Handbook of environmental engineering Association of Thailand Thai. In the following ways:(1) the underground water quality in accordance with article 2.1 (1)-(15), use the Purge method and Chromatography Gas Purge and Trap Trap Gas Chromatography or Mass Spectrometry, or other methods/PCD agreed.(2) the underground water quality in accordance with article 2.2 (1)-(7), using the Atomic Absorption Spectrometry method or Direct Aspiration/Inductively Coupled Plasma method/Plasma Emission Spectroscopy or how PCD agreed.
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