This Standard specifies three methods for the pretreatment of soil samples in the laboratory prior to the determination of organic contaminants: - if volatile organic compounds are to be measured; - if moderately volatile to non volatile organic compounds are to be measured, if the result of the subsequent analysis must be accurate and reproducible, and if the sample contains particles larger than 2 mm and/or the contaminant is heterogeneously distributed; - if non-volatile organic compounds are to be measured and the extraction procedure prescribes a field moist sample, or if the largest particles of the sample are smaller than 2 mm and the contaminant is