Download or read book The Analysis of the Natural Attenuation of Chlorinated Solvents in Groundwater at the Former Westinghouse Site in Bloomfield New Jersey written by Deborah J. Katchen and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Symposium on Natural Attenuation of Chlorinated Organics in Ground Water written by and published by DIANE Publishing. This book was released on 1996 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical and Retrospective Survey of Monitored Natural Attenuation written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: As requested by the Savannah River Technology Center, Groundwater Services, Inc. (GSI), has conducted a historical analysis of Monitored Natural Attenuation (MNA) application at chlorinated solvent sites. The objective of the analysis was to document trends, characteristics, successes, and barriers in the use of MNA as a remedy at chlorinated solvent sites. The analysis consisted of the following: (1) a review of recent literature regarding application of natural attenuation at chlorinated solvent sites, (2) a review of regulatory and industry guidance directing evaluation and implementation of MNA as a remedy at chlorinated solvent sites, and (3) a historical survey distributed to MNA experts, which requested data relating to the evaluation and implementation of MNA at chlorinated solvent sites.
Download or read book Natural Attenuation of Chlorinated Solvents Petroleum Hydrocarbons and Other Organic Compounds written by Bruce C. Alleman and published by . This book was released on 1999 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural attenuation was first demonstrated at sites with hydrocarbon contamination, but recent studies at sites contaminated by chlorinated compounds have shown that this approach often has merit for these more challenging contamination problems. This volume covers natural attenuation in media ranging from deep aquifers to shallow soils, and for contaminants ranging from fuels to solvents to herbicides, and offers the reader a comprehensive overview of case studies that represent the state of the art in natural attenuation approaches to site remediation.
Download or read book Assessment of Potential for Natural Attenuation of Chlorinated Ethenes and Ethanes in Ground Water at a Petrochemical Reclamation Site Harris County Texas written by Glenn F. Huff and published by . This book was released on 2000 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Attenuation of Chlorinated Ethenes by Anaerobic Reductive Dechlorination Coupled with Aerobic Cometabolism written by DEREK. VEERKAMP and published by . This book was released on 1999-03-01 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorinated solvents and their daughter products are the most common contaminants of groundwater at industrial and military facilities in the United States. Limitations of conventional technologies have intensified efforts to find alternative methods to remediate contaminated sites to regulatory goals set by CERCLA. Natural attenuation of chlorinated solvents is a promising alternative to traditional pump and treat methods but has not been well understood or widely accepted. This modeling study investigated the ability of TCE to completely degrade under various aquifer conditions and rate order constants. It also examined a case study of a former landfill site at Moody AFB. We found unusually high flow of ground water by advection or dispersion inhibits the complete degradation of TCE. High concentrations of sulfate or nitrate inhibit the creation of methanogenic conditions and therefore inhibit reductive dechlorination of TCE. We also found an electron donor co-contaminant a critical factor for the complete destruction of TCE because it creates anaerobic conditions. The model illustrated a possible explanation for the lack of down gradient contaminants at the landfill site may be the coupling of reductive dechlorination and cometabolism naturally attenuation the contaminants.
Download or read book Symposium on Natural Attenuation of Chlorinated Organics in Ground Water Held in Dallas TX on September 11 13 1996 written by and published by . This book was released on 1996 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: Introductory Talk: Where Are We Now? Moving to a Risk-Based Approach; Introductory Talk: Where Are We Now With Public and Regulatory Acceptance? (Resource Conservation and Recovery Act (RCRA) and Comprehensive Environmental Response, Compensation, and Liability Act CERCLA); Biotic and Abiotic Transformations of Chlorinated Solvents in Ground Water; Microbiological Aspects Relevant to Natural Attenuation of Chlorinated Ethenes; Microbial Ecology of Adaptation and Response in the Subsurface; Identifying Redox Conditions That Favor the Natural Attenuation of Chlorinated Ethenes in Contaminated Ground-Water Systems; Design and Interpretation of Microcosm Studies for Chlorinated Compounds; Conceptual Models for Chlorinated Solvent Plumes and Their Relevance to Intrinsic Remediation; Site Characterization Tools: Using a Borehole Flowmeter To Locate and Characterize the Transmissive Zones of an Aquifer; Overview of the Technical Protocol for Natural Attenuation of Chlorinated Aliphatic Hydrocarbons in Ground Water Under Development for the U.S. Air Force Center for Environmental Excellence; Case Study of Natural Attenuation of Trichloroethene at St. Joseph, Michigan; Extraction of Degradation Rate Constants From the St Joseph, Michigan, Trichloroethene Site; Natural Attenuation of Chlorinated Aliphatic Hydrocarbons at Plattsburgh Air Force Base, New York; Case Study: Natural Attenuation of a Trichloroethene Plume at Picatinny Arsenal New Jersey; Case Study: Plant 44, Tucson, Arizona; Remediation Technology Development Forum Intrinsic Remediation Project at Dover Air Force Base Delaware; Case Study: Wurtsmith Air Force Base, Michigan; Case Study: Eielson Air Force Base, Alaska; Considerations and Options for Regulatory Acceptance of Natural Attenuation in Ground Water Lessons Learned: Risk-Based Corrective Action. p4-5.
Download or read book Natural Attenuation of Chlorinated Solvents in Groundwater written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of the Potential for Natural Attenuation of Chlorinated Solvents in Contaminated Groundwater in the Texas High Plains written by Amandeep Singh Kang and published by . This book was released on 2000 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Underd nigt bet nkande och f rslag written by and published by . This book was released on 1893 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitored Natural Attenuation of Chlorinated Solvents written by Daniel F. Pope and published by . This book was released on 1999 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Attenuation of Chlorinated Solvent Ground Water Plumes Discharging Into Wetlands written by and published by . This book was released on 2002 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: A substantial number of chlorinated solvent ground-water plumes at hazardous waste sites may potentially discharge into ecologically sensitive wetland environments. Although chlorinated solvents tend to be relatively resistant to degradation within most aquifer systems, rapid and complete transformations can occur within the organic-rich reducing environment typical of wetland sediments, suggesting that monitored natural attenuation may be an effective remediation option for discharges into wetlands. A previous study by the U.S. Geological Survey (USGS) in a freshwater tidal wetland at Aberdeen Proving Ground (APG), Maryland, showed complete attenuation of chlorinated solvents before the wetland surface or creek was reached. A collaborative study by the USGS and the Air Force Research Laboratory under the Department of Defense Environmental Security Technology Certification Program (ESTCP) was conducted to determine if the natural attenuation of chlorinated solvents that occurs at the APG wetland site can occur at wetland sites located in different hydrogeologic environments and to assist in the transfer of this technology to other potential users. The objectives of this ESTCP demonstration project were to (1) assess and compare the extent of natural attenuation of chlorinated solvent at three wetland sites in different hydrogeologic environments; (2) to demonstrate and compare different methods of sampling and analysis for collecting the site data needed to evaluate natural attenuation in wetlands; and (3) to develop a technical protocol for the assessment of natural attenuation of chlorinated solvent plumes discharging into wetlands.
Download or read book CHARACTERIZATION AND MONITORING OF NATURAL ATTENUATION OF CHLORINATED SOLVENTS IN GROUNDWATER written by David Peterson and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this document is to examine the use of a phased approach to characterizing and monitoring (C & M) natural attenuation processes and enhanced attenuation processes and to identify promising tools and techniques by which to accomplish the C & M. We will investigate developing techniques, such as molecular-based assessment tools, and existing tools that traditionally have not been used for monitoring the performance of environmental remediation technologies. Case studies will be used to provide examples of how non-traditional methods are being employed as characterization and monitoring tools to support MNA and EA. The document is not focused on a specific group of readers but rather is broadly directed with the intent that readers may gain information useful to their purposes. Thus, regulators may see some future characterization and monitoring techniques; end users may find novel ways to make MNA or EA more effective or efficient at their site; researchers may identify new areas for development or new and better combinations of existing methods. One consequence of this broad approach is that some readers may find certain sections either too rudimentary or too advanced for their needs. Hopefully, all will be able to use at least some of the document.
Download or read book Technical Protocol for Evaluating Natural Attenuation of Chlorinated Solvents in Groundwater Revision 1 written by and published by . This book was released on 1996 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past several years remediation by natural attenuation has become increasingly accepted as a remedial alternative for organic compounds dissolved in groundwater. The United States Environmental Protection Agency (USEPA) defines natural attenuation as (OSWER, 1996): The term 'Natural Attenuation' refers to naturally-occurring processes in soil and groundwater environments that act without human intervention to reduce the mass, toxicity, mobility, volume, or concentration of contaminants in those media. These in-situ processes include biodegradation, dispersion, dilution, adsorption, volatilization, and chemical or biological stabilization or destruction of contaminants. In practice, natural attenuation also is referred to by several other names, such as intrinsic remediation, intrinsic bioremediation, natural restoration, or passive bioremediation. The goal of any site characterization effort is to understand the fate and transport of the contaminants of concern over time in order to assess any current or potential threat to human health or the environment. Natural attenuation processes, such as biodegradation, can often be dominant factors in the fate and transport of contaminants. Thus, consideration and quantification of natural attenuation is essential to a more thorough understanding of contaminant fate and transport.
Download or read book Characterization And Monitoring Of Natural Attenuation Of Chlorinated Solvents In Ground Water written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Attenuation of Chlorinated Solvents Performance and Cost Results from Multiple Air Force Demonstration Sites written by and published by . This book was released on 1999 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical memorandum summarizes the results of natural attenuation treatability studies (TSs) conducted at 14 United States (US) Air Force sites in the Continental US. In June 1993, the Air Force Center for Environmental Excellence, Technology Transfer Division (AFCEE/ERT), in cooperation with the US Environmental Protection Agency National Risk Management Research Laboratory, Subsurface Protection and Remediation Division, and Parsons Engineering Science, Inc. (Parsons ES), began a major initiative to evaluate the effectiveness of monitored natural attenuation (MNA) for remediation of groundwater contaminated with organic compounds.
Download or read book Development and Application of a Methodology to Evaluate Natural Attenuation of Chlorinated Solvents Using Conceptual and Numerical Models written by Jaime A. Graulau-Santiago and published by . This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
