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首页> 外文期刊>Ground Water Monitoring & Remediation >Application of Direct Push Methods to Investigate Uranium Distribution in an Alluvial Aquifer
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Application of Direct Push Methods to Investigate Uranium Distribution in an Alluvial Aquifer

机译：直接推动方法在冲积含水层中铀分布研究中的应用

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摘要

The U.S. EPA 2000 Radionuclide Rule established a maximum contaminant level (MCL) for uranium of 30 μg/L. Many small community water supplies are struggling to comply with this new regulation. At one such community, direct push (DP) methods were applied to obtain hydraulic profiling tool (HPT) logs and install small diameter wells in a section of alluvial deposits located along the Platte River. This work was conducted to evaluate potential sources of elevated uranium in the Clarks, Nebraska drinking water supply. HPT logs were used to understand the hydrostratigraphy of a portion of the aquifer and guide placement of small diameter wells at selected depth intervals. Low-flow sampling of the wells provided water quality parameters and samples for analysis to study the distribution of uranium and variations in aquifer chemistry. Contrary to expectations, the aquifer chemistry revealed that uranium was being mobilized under anoxic and reducing conditions. Review of the test well and new public water supply well construction details revealed that filter packs extended significantly above the screened intervals of the wells. These filter packs were providing a conduit for the movement of groundwater with elevated concentrations of uranium into the supply wells and the community drinking water supply. The methods applied and lessons learned here may be useful for the assessment of unconsolidated aquifers for uranium, arsenic, and many other drinking water supply contaminants.
机译：美国EPA 2000放射性核素规则规定了铀的最大污染物水平（MCL）为30μg/ L。许多小型社区供水都在努力遵守这一新规定。在一个这样的社区，采用直接推（DP）方法获得水力剖面工具（HPT）测井曲线，并在沿普拉特河（Platte River）的一部分冲积层中安装小口径井。进行这项工作是为了评估内布拉斯加州克拉克斯饮用水供应中铀升高的潜在来源。 HPT测井用于了解部分含水层的水文地层学，并指导以选定的深度间隔布置小直径井。井的低流量采样提供了水质参数和样品进行分析，以研究铀的分布和含水层化学变化。与预期相反，含水层化学性质表明铀是在缺氧和还原条件下动员的。对测试井和新的公共供水井建设细节的审查显示，过滤器组件明显超出了井的筛选间隔。这些过滤器组件为将铀浓度升高的地下水输送到供水井和社区饮用水供应提供了管道。这里采用的方法和经验教训可能对评估铀，砷和许多其他饮用水供应污染物中未合并的含水层有用。

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  • 来源
    《Ground Water Monitoring & Remediation》 |2009年第4期|65-76|共12页
  • 作者

    Wesley McCall; Thomas M. Christy; Thomas Christopherson; Howard Issacs;

  • 作者单位

    Geoprobe Systems, Inc., 1835 Wall St., Salina, KS 67401;

    Geoprobe Systems, Inc., 1835 Wall St., Salina, KS 67401;

    Nebraska Water Well Standards Program, Nebraska Dept. of Health and Human Services, 301 Centennial Mall South, Lincoln, NE 68509;

    Monitoring and Compliance, Nebraska Drinking Water Program, Nebraska Dept. of Health and Human Services, 301 Centennial Mall South, P.O. Box 95026, Lincoln, NE, 68509-5026;

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