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Author: New York (State). Legislature. Assembly. Committee on Environmental Conservation
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages : 173
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Author: New York (State). Legislature. Assembly. Committee on Environmental Conservation
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages : 173
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Book Description
Author:
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages : 40
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Book Description
Author: New York (State). Legislature. Assembly. Committee on Environmental Conservation
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages : 462
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Author: United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 88
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Author: Matthew Daniel Jordan
Publisher:
ISBN:
Category :
Languages : en
Pages : 164
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Book Description
The migration of contaminants from the subsurface into the indoor air environment, in a process described as soil vapor intrusion, is gaining attention as a potential pathway for exposure to contaminated soil and water. Indoor, outdoor and soil air samples were collected from forty homes in North Texas to investigate the attenuation of trichloroethylene (TCE) from contaminated groundwater into residential buildings. The mean and standard deviation of the soil and indoor air attenuation factors (ratio of indoor air concentration to soil vapor concentration) were 0.14 and 0.17, respectively. Five of the 40 values were greater than 0.1 which is the suggested upper-bound by the U.S. EPA (2002). Statistical tools were used to draw correlative relationships between contaminant groundwater, soil air and indoor air concentrations. The VolaSoil model described by Waitz et al. (1996), was modified for use as a screening tool for future investigations of indoor TCE concentration. Using measured soil vapor data, the model under predicted indoor air TCE concentrations likely due to heterogeneities in the unsaturated subsurface. Inputting groundwater TCE concentrations, the model was able to capture the contaminant migration processes and produce results consistent with measured indoor TCE concentrations. Therefore, the model described in this paper maybe appropriate to be use as a screening tool in future investigations in the contamination area.
Author: Groundwater Resources Association of California
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages :
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Author: United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Health and the Environment
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 150
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Author: Yijun Yao
Publisher: Springer Nature
ISBN: 9811927006
Category : Science
Languages : en
Pages : 133
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Book Description
This book introduces key concepts in modeling and risk assessments of vapor intrusion, a process by which the subsurface volatile contaminants migrate into the building of concern. Soil vapor intrusion is the major exposure pathway for building occupants to chemicals from the subsurface, and its risk assessments determine the criteria of volatile contaminants in soil/groundwater in brownfield redevelopment. The chapters feature the recent advances in vapor intrusion studies and practices, including analytical and numerical modeling of vapor intrusion, statistical findings of United States Environmental Protection Agency’s Vapor Intrusion Database and Petroleum Vapor Intrusion Databases, the challenges of preferential pathways, and the application of building pressure cycling methods, and field practices of vapor intrusion risk assessments at developed contaminated sites and in brownfield redevelopment. This volume also summarizes the advantages and limits of current applications in vapor intrusion risk assessment, laying the groundwork for future research of better understanding in risk characterization of soil vapor intrusion using models. Written by experts in this field, Vapor Intrusion Simulations and Risk Assessments will serve as an invaluable reference for researchers, regulators, and practitioners, who are interested in perceiving the basic knowledge and current advances in risk assessments of soil vapor intrusion.
Author: U S Environmental Protection Agency
Publisher:
ISBN: 9781297050442
Category :
Languages : en
Pages : 182
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Book Description
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Author: United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Environmental Protection
Publisher:
ISBN:
Category : Indoor air pollution
Languages : en
Pages : 244
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