How to Take a Truly Representative Environmental Sample

机译：如何获得真正具有代表性的环境样本

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Contamination in soils and sediment, is very heterogeneous. There are two sources of heterogeneity: fundamental, because of differences in the composition of particles that comprise the population; and distributional, the nonrandom distribution of particles due to gravity, chemical attractions, human activity, air resistance, etc. Current environmental sampling of soils and sediment utilizes "discrete" sampling”. These samples are unrepresentative, highly variable, and unrepeatable. The resulting data is extremely difficult to interpret and legally indefensible. Alternatively, collecting and preparing a multi-incremental sample of perhaps 30 sub-samples over an exposure area provides a single sample that is representative, repeatable, and legally defensible.

机译：土壤和沉积物中的污染非常不均匀。异质性有两种来源：基本的，由于构成总体的粒子组成的差异；由于重力，化学吸引力，人类活动，空气阻力等原因，颗粒的非随机分布。当前的土壤和沉积物环境采样采用“离散”采样”。这些样本无代表性，高度可变且不可重复。由此产生的数据极难解释，在法律上也无可辩驳。或者，在一个暴露区域内收集并准备可能包含30个子样本的多增量样本，就可以提供一个具有代表性，可重复性和法律依据的单一样本。

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来源
《Geotechnical Engineering in the Information Technology Age》|2006年|P.1-6|共6页
会议地点 Atlanta GA(US)
作者
John P. Jent; Richard C. Callahan; Roy S. Levenger; Eric R. Ellis;
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作者单位

U.S. Army Corps of Engineers, Louisville District, P.O. Box 59, Louisville, KY 40201;

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原文格式 PDF
正文语种 eng
中图分类土力学、地基基础工程;
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How to Take a Truly Representative Environmental Sample

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