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An assessment of the impact of fuel hydrocarbons and oxygenates on groundwater resources with a methodology for prioritizing regulatory action at leaking underground fuel tank sites.

机译：评估碳氢化合物和含氧化合物对地下水资源的影响，并采用一种方法来确定在泄漏的地下油箱处所要采取的优先措施。

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摘要

The widespread use of the fuel oxygenate methyl tertiary butyl ether (MTBE), combined with its persistence and mobility in the subsurface environment, have contributed to its dominant presence and frequent detection in groundwater plumes and community water system (CWS) wells in the U.S. Concerns about potential groundwater contamination from MTBE have led several states to consider or enact MTBE bans. However, the environmental consequences of replacing MTBE with another oxygenate (or a group of oxygenates) is largely unknown. This work assessed the potential for groundwater contamination of fuel hydrocarbons (FHCs) and oxygenates by examining their occurrence, distribution, and extent at leaking underground fuel tank (LUFT) sites in the greater Los Angeles region. LUFT sites are particularly important because they represent major point sources of gasoline constituents and the leading cause of FHC and oxygenate groundwater contamination.; This work demonstrated that in the absence of new design and construction of the underground fuel tank (UFT) system that emphasizes detection, repair, and containment, an effective management strategy may involve placing greater emphasis on a UFT program for ensuring adequate compliance with existing regulations. The plume lengths data indicated that under a well managed UFT program, with prompt detection and cleanup of source contaminants associated with failed UST systems, the majority of FHC and oxygenate plumes associated with release(s) from LUFT facilities were relatively “localized.” The adequate compliance with existing UST regulations may decrease the probability of future leakage and allow for prompt response and cleanup of possible sources.; This work also presented a screening methodology for prioritizing regulatory action at FHCs- and oxygenates-impacted LUFT sites. The objective of this work is focused on using model applications as a regulatory screening tool to help organize and synthesize the available field data. This work demonstrated that the screening-model applications can be consistently applied to generate reliable and conservative model predictions (e.g., MTBE plume travel time) when the LUFT field data met the data requirements and model assumptions specific to the screening-model applications.
机译：含氧燃料的甲基叔丁基醚（MTBE）的广泛使用，加上其在地下环境中的持久性和流动性，使其在美国的地下水羽和社区水系统（CWS）井中占主导地位并经常被发现。关于MTBE可能对地下水造成的污染，导致多个州考虑或颁布MTBE禁令。但是，用另一种含氧化合物（或一组含氧化合物）代替MTBE的环境后果是未知的。这项工作通过检查大洛杉矶地区地下燃料箱（LUFT）泄漏点的发生，分布和程度，评估了燃料烃（FHC）和含氧化合物对地下水的潜在污染。 LUFT站点特别重要，因为它们代表了汽油成分的主要来源，也是FHC和含氧化合物地下水污染的主要原因。这项工作表明，在缺乏新的设计和构造的地下油箱（UFT）系统缺乏强调检测，维修和围堵的情况下，有效的管理策略可能需要更加重视UFT计划，以确保充分遵守现有法规。烟羽长度数据表明，在管理良好的UFT计划下，由于及时发现和清除与UST系统故障相关的源污染物，与LUFT设施释放相关的大部分FHC和含氧烟羽相对“本地化”。充分遵守现有的UST法规可能会降低将来泄漏的可能性，并能迅速做出反应并清理可能的污染源。这项工作还提出了一种筛选方法，可以优先考虑FHC和含氧化合物影响的LUFT位点的调控作用。这项工作的目标集中在使用模型应用程序作为监管筛选工具来帮助组织和综合可用的现场数据。这项工作表明，当LUFT现场数据满足特定于筛选模型应用程序的数据要求和模型假设时，筛选模型应用程序可以始终如一地应用于生成可靠且保守的模型预测（例如MTBE羽流时间）。

著录项

  • 作者

    Shih, Tom Chieh-Cheng.;

  • 作者单位

    University of California, Los Angeles.;

  • 授予单位 University of California, Los Angeles.;
  • 学科 Environmental Sciences.; Engineering Environmental.
  • 学位 D.Env.
  • 年度 2003
  • 页码 261 p.
  • 总页数 261
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境科学基础理论;环境污染及其防治;
  • 关键词

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