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Definitions for natural attenuation from several organizations ... Several organizations have developed definitions for natural attenuation. ... The 'natural attenuation processes' that are at work in such a remediation approach include a variety of physical, chemical, or biological processes that, under favorable conditions,
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toxics.usgs.gov/definitions/natural_attenuation.html
toxics.usgs.gov/definitions/natural_attenuation.html
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Information on natural attenuation and biodegradation of contaminants from the USGS Toxic Substances Hydrology Program ... Natural attenuation and biodegradation of contaminants...
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toxics.usgs.gov/topics/attenuation.html
toxics.usgs.gov/topics/attenuation.html
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Natural attenuation is not the same as "no action," although it often is perceived as such. CERCLA requires evaluation of a "no action" alternative but does not require evaluation of natural attenuation.
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www.frtr.gov/matrix2/section4/4-32.html
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Executive Summary of Natural Attenuation ... Natural Attenuation has emerged in recent years as a viable approach for remediating groundwater at many contaminated sites for numerous reasons. ... Resource Library > Technology Transfer > Programs and Initiatives > Monitored Natural Attenuation > Overview...
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www.afcee.af.mil/resources/technologytransfer/programsa...
www.afcee.af.mil/resources/technologytransfer/programsandinitiatives/monitorednaturalattenuation/overview/index.asp
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Overview of Natural Attenuation of Sediments; Mulligan, CN; Research Chair in Environmental Engineering, Concordia University, Montreal, Canada; Yong, RN; North Saanich, B.C., Canada; (Received 30 March 2005;
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www.astm.org/JOURNALS/JAI/PAGES/205.htm
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Although the use of natural attenuation as a treatment process is increasing for remediation of contaminated groundwater, much less research has focused on contaminated soils and sediments. Industrial effluents, agricultural runoff, and sewage discharges are major sources of contaminants for the sediments.
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www.astm.org/DIGITAL_LIBRARY/STP/PAGES/STP37689S.htm
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SEQUENCE Overview ... SEQUENCE (U.S. Patent Pending) is a revolutionary new software package that provides an innovative approach for visualizing the effects of natural attenuation based on a modified radial diagram method.
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www.scisoftware.com/products/sequence_overview/sequence...
www.scisoftware.com/products/sequence_overview/sequence_overview.html
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Natural Attenuation for Groundwater Remediation NATIONAL ACADEMY PRESS 2101 Constitution Avenue, N.W. Washington, DC 20418 NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of...
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www.nap.edu/books/0309069327/html/
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Sites contaminated with metals and radionuclides pose special problems for application of the natural attenuation approach. Whereas natural attenuation of organic contaminants means breakdown by microorganisms, natural attenuation of metals often means sequestering or transformation by the soil matrix or dilution.
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www.sandia.gov/eesector/gs/gc/wm98rna.htm
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