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首页> 外文期刊>Environmental Science & Technology >Vapor Intrusion Screening Model for the Evaluation of Risk-Based Vertical Exclusion Distances at Petroleum Contaminated Sites
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Vapor Intrusion Screening Model for the Evaluation of Risk-Based Vertical Exclusion Distances at Petroleum Contaminated Sites

机译：评估石油污染场所基于风险的垂直排他距离的蒸汽入侵筛选模型

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摘要

The key role of biodegradation in attenuating the migration of petroleum hydrocarbon vapors into the indoor environments has been deeply investigated in the last decades. Very recently, empirical screening levels for the separation distance from the source, above which the potential for vapor intrusion can be considered negligible, were defined. In this paper, an analytical solution that allows one to predict risk-based vertical screening distances for hydrocarbons compounds is presented. The proposed solution relies on a 1-D vapor intrusion model that incorporates a piecewise first-order aerobic biodegradation limited by oxygen availability and accounts also for the effect of the building footprint The model predictions are shown to be consistent with the results obtained using a 3-D numerical model and with the empirical screening criteria defined by U.S.EPA and CRC care. However, the different simulations carried out show that in some specific cases (e.g., large building footprint, high methane concentration, and low attenuation in the capillary fringe), the respect of these empirical screening criteria could be insufficient to guarantee soil-gas concentrations below acceptable risk-based levels.
机译：在过去的几十年中，已经对生物降解在减弱石油烃蒸气向室内环境中迁移的关键作用进行了深入研究。最近，定义了与源的分离距离的经验筛选水平，在该水平之上可以认为蒸气侵入的可能性可以忽略。本文提出了一种分析解决方案，可以预测基于风险的碳氢化合物的垂直筛选距离。提出的解决方案依赖于一维蒸汽入侵模型，该模型结合了分段的一阶需氧生物降解，受氧气供应量的限制，并且还考虑了建筑足迹的影响。模型预测显示与使用3得到的结果一致-D数值模型，并具有USEPA和CRC护理定义的经验筛选标准。但是，进行的不同模拟显示，在某些特定情况下（例如，较大的建筑占地面积，高甲烷浓度和毛细管边缘的低衰减），对这些经验筛选标准的尊重可能不足以保证土壤气体浓度低于可接受的基于风险的水平。

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  • 来源
    《Environmental Science & Technology》 |2014年第22期|13263-13272|共10页
  • 作者

    Iason Verginelli; Renato Baciocchi;

  • 作者单位

    Laboratory of Environmental Engineering, Department of Civil Engineering and Computer Science Engineering, University of Rome 'Tor Vergata', Via del Politecnico, 1 00133 Rome, Italy;

    Laboratory of Environmental Engineering, Department of Civil Engineering and Computer Science Engineering, University of Rome 'Tor Vergata', Via del Politecnico, 1 00133 Rome, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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