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This report provides an engineering analysis of, and status report on, selected enhancements for soil vapor extraction (SVE) treatment technologies. The report is intended to assist project managers considering an SVE treatment system by providing them with an up-to-date status of enhancement technologies; an evaluation of each technology's applicability to various site conditions; a presentation of cost and performance information; a list of vendors specializing in the technologies; a discussion of relative strengths and limitations of the technologies; recommendations to keep in mind when considering the enhancements; and a compilation of references. The performance of an SVE system depends on properties of both the contaminants and the soil. SVE is generally applicable to compounds with a vapor pressure of greater than 1 millimeter of mercury at 20EC and a Henry s Law constant of greater than 100 atmospheres per mole fraction. SVE is most effective at sites with relatively permeable contaminated soil and with saturated hydraulic conductivities of greater than 1 x 10 or 1 x 10 centimeter per second (cm/s). SVE by itself does not effectively remove contaminants -3 -2 in saturated soil. However, SVE can be used as an integral part of some treatment schemes that treat both groundwater and the overlying vadose zone. Enhancement technologies should be considered when contaminant or soil characteristics limit the effectiveness of SVE or when contaminants are present in saturated soil. The five enhancement technologies covered in this report are as follows and are described in the following subsections: * Air Sparging * Dual-phase Extraction * Directional Drilling * Pneumatic and Hydraulic Fracturing * Thermal Enhancement.
Although most federal facilities projects are successfully completed (i.e., they reasonably meet the agency's requirements and expectations), the perception is that development of the scope of work for design for these projects is challenging and in some cases poorly performed. Based on this perception, a study was commissioned by the Federal Facilities Council (FFC) of the National Research Council to identify the elements that should be included in a scope of work for design to help ensure that the resulting facility is one that supports the fulfillment of a federal agency's program or mission. Its objectives also included identifying key practices for developing effective scopes of work for design involving new construction or major renovation projects and identifying key practices for matching the scope of work with the acquisition strategy, given a range of project delivery systems and contract methods.
The U.S. Department of Energy has been at the center of many of the greatest achievements in science and engineering in this century. DOE spends billions of dollars funding projects-and plans to keep on spending at this rate. But, documentation shows that DOE's construction and environmental remediation projects take much longer and cost 50% more than comparable projects undertaken by other federal agencies, calling into question DOE's procedures and project management. What are the root causes for these problems?
Offers theoretical and practical approaches to both the analysis of international projects and their financing
'. . . this is a book one would expect to find in all libraries and on all development studies reading lists.' – John Hailey, Journal of International Development '. . . the Handbook is a unique reference tool on international development policy and management. Its format, both comprehensive in coverage and concise in content, will make it essential reading for the growing number of postgraduates studying development policy and management, as well as for public administration, foreign consultants and aid workers in low- and middle-income countries.' – Andrew Nickson, Public Administration 'This Handbook will surely prove to be an essential to the students, practitioners and others concerned with improvement of human condition in developing countries.' – Pundarik Mukhopadhaya, The Singapore Economic Review '. . . this Handbook offers a significant remedy to the scarcity of material in this important area. . . It is certainly very near the top of this reviewer's list of recommended reading for students, researchers and practitioners concerned with development policy.' – Michael Tribe, Development Policy Review '. . . the Handbook offers an excellent one volume survey of modern development policy and practice in poor countries.' – Tony Jackson, The Journal of the Institution of Economic Development 'This comprehensive collection contains an excellent introduction to all the major issues of development policy.' – Frances Stewart, Queen Elizabeth House, University of Oxford, UK This important Handbook on international development policy and management covers a broad spectrum of contemporary topics across all the major areas of interest. With over 40 chapters, the book comprehensively explores the many themes and issues of significance for both policy and implementation, and provides easily accessible reference material on current practice and research. The 42 contributors come from a diverse range of backgrounds, and enjoy international reputations in their chosen fields. The Handbook is organised in two parts, one dealing with policy issues and the other with implementation and management issues. The first part, on policy, covers a wide range of economic, social and environmental topics. The second part explores the political context of implementation and development practice and goes on to cover a range of issues relating to management in the public and non-state sectors and the management of development projects. Each individual chapter provides background information on theory and practice, describes the current 'state of play', examines prospects for the future and includes an annotated guide to further reading. This extensive handbook will become an essential reference on international development policy and management. Although primarily designed for postgraduate students and scholars of development studies, it will also be welcomed by development practitioners, NGOs and aid agencies.