A direct‐drive high‐resolution passive profiler (HRPP) was developed to quantify and delineate concentrations of chlorinated volatile organic compounds (CVOCs), geochemical indicators and CVOC‐degrading microorganisms/genes, as well as to perform compound‐specific stable isotope analysis (CSIA) of CVOCs and estimate interstitial velocity at <30‐cm resolution. The profilers can be coupled together to provide a continuous sample interval and advanced to depths up to approximately 9 m below‐ground surface (bgs) within saturated media where direct‐push techniques are feasible. The HRPP was field tested in a previous dense nonaqueous phase liquid (DNAPL) source zone at the former Naval Air Station in Alameda, CA. HRPP data sets were compared to the following traditional groundwater data sets: CVOC and anion concentrations in standard and multilevel monitoring well water samples, CVOC concentrations in soil core samples, qualitative contaminant profiles delineated with a membrane interface probe (MIP), microbial community and CSIA profiles from Bio‐Traps® deployed in wells, groundwater velocity from passive flux meters (PFMs), lithologic profiles correlated with MIP electrical conductivity (EC), and velocity estimates based on permeability profiles measured with a Geoprobe hydraulic profiling tool (HPT). In some cases, the HRPP data were equivalent to traditional techniques and, in other cases, the HRPP data were more representative of local variability rather than bulk aquifer conditions. Overall the results support the use of the HRPP to provide high‐resolution data on concentrations, velocity, and microbial activity in temporary direct‐push deployments without well installation, providing a new tool to better assess source zones and contaminated groundwater plumes, even in low permeability media, and to increase the fidelity of site transport models.

中文翻译：

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使用被动轮廓仪对含氯溶剂影响的含水层进行高分辨率表征

开发了一种直接驱动的高分辨率被动轮廓仪（HRPP），以定量和描述氯化挥发性有机化合物（CVOC），地球化学指示剂和降解CVOC的微生物/基因的浓度，并进行化合物特定的稳定同位素分析（ CSVO），并以小于30 cm的分辨率估算间隙速度。可以将剖析仪耦合在一起以提供连续的采样间隔，并在可行的直接推压技术下，在饱和介质中前进至最深约9 m的地下深度。HRPP在加利福尼亚州阿拉米达市前海军航空站的先前稠密非水相液体（DNAPL）源区中进行了现场测试。将HRPP数据集与以下传统地下水数据集进行了比较：标准和多级监测井水样品中的CVOC和阴离子浓度，土壤核心样品中CVOC浓度，由膜界面探针（MIP）描绘的定性污染物剖面，来自Bio-Traps®的微生物群落和CSIA剖面分布在井中，地下水流速无源通量计（PFM），与MIP电导率（EC）相关的岩性剖面以及基于用Geoprobe液压轮廓分析工具（HPT）测量的渗透率剖面的速度估算。在某些情况下，HRPP数据与传统技术相当，而在其他情况下，HRPP数据更能代表局部变化，而不是大含水层条件。总体而言，结果支持使用HRPP提供有关浓度，速度，