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Evaluation of a novel natural attenuation seenario

机译：新型自然衰减seenario的评估

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Subsurface occurrences of DNAPL pools, residual in soil, and dissolved PAHs and BTEX in groundwater have been delineated at a former coal tar processing and coke production plant in New Jersey. A Brownfields remediation plan has been proposed for the site with the objective of stopping the discharge of DNAPL and impacted groundwater to an adjacent river, and limiting the potential for direct exposure to surface soil. As part of the remediation, over 4 million cubic yards of structural fill will be placed over the site, and containment walls will be installed along the river shoreline. The modeling analysis conducted to evaluate the plan had a unique aspect: it is expected that in the period immediately following fill placement and containment, most of the groundwater flowing off the site wil originate from consolidation of the underlying compressible strata. Modeling results indicated that natural attenuation would achieve remedial objectivesfor the dissolved-phase plume.
机译：在新泽西州的一家前煤焦油加工厂和焦炭生产厂已经确定了DNAPL池的地下发生，土壤中的残留以及地下水中溶解的PAHs和BTEX的存在。已提出针对该地点的Brownfields修复计划，目的是停止将DNAPL和受影响的地下水排放到附近的河流，并限制直接暴露于表层土壤的潜力。作为补救措施的一部分，将在场地上方放置超过400万立方码的结构填充物，并沿河岸线安装围护墙。为评估该计划而进行的建模分析具有一个独特的方面：预计在紧接填充和围堵之后的这段时间内，从现场流出的大部分地下水将来自底层可压缩地层的固结。建模结果表明，自然衰减将实现溶解相羽流的修复目标。

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