CAREER: Vapor Intrusion, Knowledge Brokers and Environmental Health - A Three-Dimensional Perspective

1452800PI：Pennell，KellyCAREER：蒸汽入侵、知识经纪人和环境健康-三维视角人们平均90%的时间在室内，这使得室内空气质量变得极其重要。室内空气污染的来源很多，但经常被忽视的一个来源是地下蒸汽进入室内空气空间(即蒸汽侵入)。众所周知，蒸汽侵入很难表征，因为室内空气中极低的化学浓度与健康相关，建模室内空气和地下环境需要复杂的方法。该项目将弥合地面空间和地下空间空中运输模型之间存在的差距。这项研究介绍了一种新的方法，其中挥发性有机化合物蒸气入侵模型将首次纳入大气、室内和地下环境，以努力处理PI收集的无法解释的初步现场数据，以及文献中一些无法解释的现场观测的最近报告。由于蒸汽入侵法规正在迅速出现，科学家和工程师必须将产生的新知识转化为与关键利益攸关方快速有效地接触。这项提议的教育目标是将学生培训为知识经纪人，以在学术研究人员和关键利益相关者之间架起桥梁，如监管机构、专业人士、立法者和社区成员。建模将涉及计算流体动力学方法。现场数据集包括室内空气浓度和土壤气体浓度的变化，这些变化与现有的数值模型不一致。在定性上，现场数据不能模拟当前对蒸汽入侵的概念性理解，这使得当前的蒸汽入侵模型在描述现场观测方面的能力极其有限。拟议的模型将通过在地下和地上区域之间建立与环境命运和运输相关的重要的、以前被省略的联系来推动环境工程领域的发展。此外，蒸汽侵入特征还需要来自许多不同学科的科学知识(例如，土壤科学家、工业卫生学家、分析化学家、环境工程师)才能充分了解这一问题。该项目将开发一种新的蒸汽入侵模拟技术，将地下命运和运输模拟与机械和工业工程方法相结合，以模拟地上空气运输。研究成果将纳入蒸汽侵入评估实践，以便使用准确的科学方法评估暴露风险。研究结果将与相关利益攸关方分享，以确保研究结果与政策决策具有相关性。

1452800PI: Pennell, KellyCAREER: Vapor Intrusion, Knowledge Brokers and Environmental Health - A Three-Dimensional PerspectiveThe average person spends 90 % of their time indoors, which makes indoor air quality extremely important. There are many sources of indoor air contamination, but one that is too often overlooked is the transport of subsurface vapors into indoor air spaces (i.e. vapor intrusion).Vapor intrusion is notoriously difficult to characterize because extremely low chemical concentrations in indoor air are health-relevant and modeling indoor air and subsurface environments requires sophisticated approaches. This project will bridge the gap that exists between air transport modeling of above ground spaces and subsurface spaces. The research introduces a novel approach, where for the first time a volatile organic chemical vapor intrusion model will incorporate atmospheric, indoor and subsurface environments, in an effort to address unexplained preliminary field data collected by the PI, as well as some recent reports of unexplained field observations in the literature. Since vapor intrusion regulations are rapidly emerging, new knowledge generated must be translated by scientists and engineers to engage with key stakeholders, quickly and effectively. The educational goal of this proposal is to train students as knowledge brokers to build bridges between academic researchers and key stakeholders, such as regulators, professionals, legislators, and community members. The modeling will involve computational fluid dynamic approaches. The field data sets include variations in indoor air concentrations and soil gas concentrations that are inconsistent with existing numerical models. Qualitatively, the field data does not mimic the current conceptual understanding of vapor intrusion, which makes current vapor intrusion models extremely limited in their ability to describe field observations. The proposed model will advance the field of environmental engineering by establishing important, and previously omitted connections between the subsurface and aboveground domains that are relevant for environmental fate and transport. Moreover, vapor intrusion characterization also requires scientific knowledge from many different disciplines (e.g. soil scientists, industrial hygienists, analytical chemists, environmental engineers) to fully understand the matter. This project will develop a new vapor intrusion modeling technique that combines subsurface fate and transport modeling with mechanical and industrial engineering approaches for modeling aboveground air transport. Research results will be integrated into vapor intrusion assessment practices, so that exposure risks are assessed using accurate science-based methods. The results of the research will be shared with relevant stakeholders to ensure research results gain relevancy for policy decisions.