Download or read book A Model for Economically Based Conceptual Design of Soil Vapor Extraction Systems written by D.W. DePaoli (Wilson, J.H.) and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Soil Vapor Extraction Systems Under Conditions of Uncertainity written by David Lyle Barnes and published by . This book was released on 1997 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remediation Technologies Screening Matrix and Reference Guide written by and published by . This book was released on 1994 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Mathematical Model for Design of Multiple Well Soil Vapor Extraction Systems written by H-T Hsu and published by . This book was released on 1996 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil vapor extraction (SVE) is a proven tecnnology that can remove volatile organic compounds (VOCs) from the subsurface effectively if the conditions are favorable. However, most systems are designed by empirical methods or engineering judgement based on results of pilot tests. An attempt is made to develop a mathematical model for the technology so that optimal operating parameters can be obtained. The pressure distributions induced by multiple-well extractions are obtained by superimposing an existing analytical solution. Concentrations of VOCs as a function of time and space are obtained by numerical simulation of the migration and fate of VOC. The effectiveness of SVE systems using different operating parameters is evaluated on the basis of the quantity of contaminant removed. The developed mathematical model provides the necessary engineering design tools to evaluate different operation scenarios.
Download or read book Tools to Improve Models for Design and Assessment of Soil Vapor Extraction Systems written by JD. Gallinatti and published by . This book was released on 1996 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although soil vapor extraction (SVE) is well established as an effective method of removing volatile organic compounds from soil, the spatial extent of extraction influence is often poorly understood. Typically, the limit of a detectable vacuum response in vadose monitoring wells is used to define radius of influence without regard for the pneumatic conductivity, vacuum measurement limitations, or barometric pressure effects. Vapor flow conditions are often assumed to be confined, but even beneath surface pavement or clay layers, vertical leakance of air is usually a dominant influence.
Download or read book Soil Vapor Extraction SVE Enhancement Technology Resource Guide written by and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SOIL VAPOR EXTRACTION SYSTEM DESIGN written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil vapor extraction (SVE) systems are typically designed based on the results of a vadose zone pumping test (transient or steady state) using a pressure criteria to establish the zone of influence (ZOI). A common problem associated with pressure based SVE design is overestimating the ZOI of the extraction well. The vacuum criteria commonly used to establish the boundary of the ZOI results in large areas with very low pore velocities and thus long cleanup times. As a result, design strategies based upon critical pore gas velocity (CPGV) have increased in popularity. The CPGV is used in an effort to loosely incorporate the effects of mass transfer limitations into the design of SVE systems. Critical pore gas velocity designs use a minimum pore gas velocity rather than minimum vacuum to identify the extent of the treatment zone of an SVE system. The CPGV is typically much larger than the pore gas velocity at the perimeter of vacuum based (ZOI) designs resulting in shorter cleanup times. In this paper, we report the results of testing performed at the Savannah River Site (SRS) to determine the influence of a vapor extraction well based upon both a pressure and pore gas velocity design criteria. Results from this testing show that a SVE system designed based upon a CPGV is more robust and will have shorter cleanup times due to increased flow throughout the treatment zone. Pressure based SVE design may be appropriate in applications where soil gas containment is the primary objective; however, in cases where the capture and removal of contaminated soil gas is the primary objective, CPGV is a better design criteria.
Download or read book Estimation of Operation Time for Soil Vapor Extraction Systems written by Trevor Cristopher White and published by . This book was released on 2003 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Since the inception of Soil Vapor Extraction (SVE) as a viable contaminated soil restoration strategy, operators of these systems have struggled with determining the best date to terminate operation of their systems. Using principles of soil-gas flow and mass transport through unsaturated soils, stochastic hydrogeology, uncertainty analysis, and a cost/risk decision model, a procedure that can determine the appropriate time to discontinue operation of SVE systems was developed. Modeling of physical characteristics and determination of mass removal of a SVE system was accomplished using statistical realizations of permeability (uncertainty model) and a 2D advective-dispersive finite element vapor transport program (VapourT). The results from subsequent Monte Carlo analysis of the mass removal simulations are then subjected to a cost/risk analysis (decision model) to determine the appropriate termination time for the system based on costs and the probability that the system will fail to reach the regulatory standard. The decision model provides information on the cost benefits associated with either the continued operation of a SVE system, or its replacement with a more economically feasible remediation system. The intention of this research is to validate a framework for the estimation of termination time for the operational phase of a selected soil vapor extraction system"--Leaves iii.
Download or read book Engineering and Design Soil Vapor Extraction and Bioventing written by and published by . This book was released on 2002 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual provides practical guidance for the design and operation of soil vapor extraction (SVE) and bioventing (BV) systems. It is intended for use by engineers, geologists, hydrogeologists, and soil scientists, chemists, project managers, and others who possess a technical education and some design experience but only the broadest familiarity with SVE or BV systems.
Download or read book Review of Mathematical Modeling for Evaluating Soil Vapor Extraction Systems written by U.S. Environmental Protection Agency and published by BiblioGov. This book was released on 2013-10 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.
Download or read book EPA National Publications Catalog written by United States. Environmental Protection Agency and published by . This book was released on 1995 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Michigan Soil Vapor Extraction Remediation MISER Model written by Linda M. Abriola and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil vapor extraction (SVE) and bioventing (BV) are proven strategies for remediation of unsaturated zone soils. Mathematical models are powerful tools that can be used to integrate and quantify the interaction of physical, chemical, and biological processes occurring in field scale SVE/VB systems. This report describes the conceptual and mathematical formulation, numerical implementation, and application of a multiphase, multicomponent, biodegradation model designed to simulate physical, chemical, and biological interactions occurring in field scale SVE and BV systems. The model, the Michigan Soil Vapor Extraction Remediation Model (MISER), is two-dimensional and may be run in a cross-sectional or axisymmetric mode. Phase and constituent mass balance equations are discretized with a standard Galerkin finite element approach using linear triangular elements. A modular, set-iterative solution algorithm is employed. Features of the model include: the ability to simulate multiphase gas and aqueous fluid flow; the simulation of multicomponent transport processes, incorporation of rate-limited interphase mass transfer for volatilization and dissolution of an entrapped organic liquid, volatilization and sorption of aqueous phase constituents, and biophase update; and the simulation of multicomponent biodegradation kinetics and microbial population dynamics. A complete description of the computer code, implementation procedures, and example SVE and BV simulations is included.
Download or read book Review of Mathematical Modeling for Evaluating Soil Vapor Extraction Systems written by David L. Jordan and published by . This book was released on 1995 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Operations and Maintenance of the Soil Vapor Extraction Systems for the 200 West Area Carbon Tetrachloride Expedited Response Action written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
