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首页> 外文会议>Annual Waste Management Symposium >THE USE OF A DECISION CRITERIA MATRIX TO DETERMINE GROUNDWATER SAMPLING ANALYTES
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THE USE OF A DECISION CRITERIA MATRIX TO DETERMINE GROUNDWATER SAMPLING ANALYTES

机译：使用判定标准矩阵来确定地下水采样分析物

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Envirocare of Utah, Inc., currently operates an 11e.(2) disposal cell at its South Clive facility, located in the western desert of Utah. This cell is licensed by the Nuclear Regulatory Agency to receive by-products from uranium mill tailing operations throughout the United States. The location of Envirocare’s South Clive Facility is ideal for the disposal of 11e.(2) waste material. One of the favorable attributes of the location is that the groundwater is of extremely poor quality (greater than 50,000 mg/L TDS) and is found in a low-yielding aquifer. High TDS waters are found in this area due to the large quantity of evaporite deposits left from the Great Salt Lake and its predecessors. These evaporites are also repositories for metals, which also make the water unsuitable for drinking. Envirocare’s current groundwater monitoring network consists of 12 shallow monitoring wells, which are sampled on a quarterly basis for major cations and anions, metals, volatile and semivolatile organic compounds, and radiologics. Quarterly analytical results are compared to baselines levels established prior to disposal activities to demonstrate compliance. Arsenic and selenium concentrations in some of the monitoring wells began to increase in the past five years. These increases are directly attributed to increasing groundwater levels caused by enhanced recharge from storm water drainage from the Department of Energy (DOE) Vitro embankment. This storm water drainage has since been diverted to a lined collection pond. As the groundwater elevations increased, residual arsenic and selenium, left in the soil as a precipitate, is re-mobilized. Although the increases in arsenic and selenium are not the result of cell leakage, Envirocare is responsible for maintaining a compliance monitoring system that will indicate a possible future release. To this end, Envirocare is modifying its current compliance monitoring network to focus on constituents that will indicate a possible release from the cell. Envirocare conducted a sorption coefficient (Kd) study to evaluate the relative mobility of constituents found in the 11e.(2) waste stream. Results of the Kd study were used in a decision criteria matrix to identify those constituents that would be the most likely to be detected, should a release occur. Other factors considered in the decision matrix were mass of constituents in the waste, current concentrations of constituents in the groundwater, and the laboratory analytical detection limits for the constituents. Envirocare anticipates that the study will decrease the current analyte list to a more diagnostic list that will provide a better indication of a release.
机译：Envirocare of utah，Inc。目前运营了11e。（2）位于犹他州西部沙漠的南部克莱维设施的处置牢房。该细胞由核监管机构获得许可，以获得铀磨机尾拖在美国的伯鎓磨机。 Envirocare的南部Clive设施的位置非常适合处理11e。（2）废料。该位置的有利属性之一是地下水质量极差（大于50,000 mg / L TDS），并在低产含水层中发现。由于大盐湖及其前辈留下了大量的蒸发矿沉积物，在该地区发现了高TDS水域。这些蒸发晶体也是金属的储存库，这也使水不适合饮用。 Envirocare的目前的地下水监测网络由12个浅层监测井组成，该井是主要的阳离子和阴离子，金属，挥发性和半抗生素有机化合物和放射学的季度抽样。将季度分析结果与在处置活动之前建立的基调水平进行比较，以证明遵守遵守情况。在过去五年中，一些监测井中的砷和硒浓度开始增加。这些增加直接归因于增加因能源部（DOE）体外堤防的风暴排水增强的地下水位。这种雨水排水已经被转移到衬里集合池塘。随着地下水升高增加，残留的砷和硒，作为沉淀物留在土壤中，被重新动员。虽然砷和硒的增加不是细胞泄漏的结果，但是Envirocare负责维护遵守监测系统，这些系统将表示可能的未来释放。为此，Envirocare正在修改其当前的合规监控网络，专注于将指示从细胞中发出的组成部分。 Envirocare进行了吸附系数（KD）研究，以评估11e中发现的成分的相对迁移率。（2）废物流。如果发生释放，则在判定标准矩阵中使用KD研究的结果，以确定最有可能检测到的组分。在决策基质中考虑的其他因素是废物中的成分质量，地下水中的当前成分浓度，以及组分的实验室分析检测限。 Envirocare预计该研究将减少当前分析物列表，以更好地提供释放的更好指示。

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