Record Display for the EPA National Library Catalog


Main Title Calculation and use of first-order rate constants for monitored natural attenuation studies /
Author Newell, Charles J. ; Rifai, H. S. ; Wilson, J. T. ; Connor, J. A. ; Aziz, J. A.
CORP Author National Risk Management Research Lab., Cincinnati, OH. ;Groundwater Services, Inc., Houston, TX. ;Texas Southern Univ., Houston.
Publisher United States Environmental Protection Agency, National Risk Management Research Laboratory,
Year Published 2002
Report Number EPA 540-S-02-500
Stock Number PB2003-103055
OCLC Number 66901690
Subjects Hazardous wastes--Natural attenuation--United States ; Groundwater--Quality--Management
Additional Subjects Attenuation ; Ground water ; Site remediation ; Biodegradation ; Dispersion ; Dilution ; Sorption ; Contaminants ; Water contamination ; First-order rate constants ; Monitored Natural Attenuation Studies
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  EPA 540-S-02-500 Region 1 Library/Boston,MA 05/25/2016
ELBD ARCHIVE EPA 540-S-02-500 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 540-S-02-500 AWBERC Library/Cincinnati,OH 03/28/2018
NTIS  PB2003-103055 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 28 pages : illustrations ; 28 cm.
This issue paper explains when and how to apply first-order attenuation rate constant calculations in monitored natural attenuation (MNA) studies. First-order attenuation rate constant calculations can be an important tool for evaluating natural attenuation processes at ground-water contamination sites. Specific applications identified in U.S. EPA guidelines (U.S. EPA, 1999) include use in characterization of plume trends (shrinking, expanding, or showing relatively little change), as well as estimation of the time required for achieving remediation goals. However, the use of the attenuation rate data for these purposes is complicated as different types of first-order rate constants represent very different attenuation processes: 'Concentration vs. time' rate constants are used for estimating how quickly remediation goals will be met at a site; 'Concentration vs. distance' bulk attenuation rate constants (k) are used for estimating if a plume is expanding, showing relatively little change, or shrinking due to the combined effects of dispersion, biodegradation, and other attenuation processes; and 'Biodegradation rate constants' are used in solute transport models to characterize the effect of biodegradation on contaminant migration.
"November 2002." "EPA/540/S-02/500." Includes bibliographical references.