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.
Other Authors
Author Title of a Work
Rifai, Hanadi S.
Wilson, John T.
Connor, John A.
Aziz, Julia A.
Suarez, Monica P.
CORP Author National Risk Management Research Lab., Cincinnati, OH. ;Groundwater Services, Inc., Houston, TX. ;Texas Southern Univ., Houston.
Publisher U.S. Environmental Protection Agency, National Risk Management Research Laboratory,
Year Published 2002
Report Number EPA/540/S-02/500
Stock Number PB2003-103055
OCLC Number 53313315
Subjects Groundwater--Pollution--Biodegradation ; Hazardous wastes--Natural attenuation ; Groundwater--Purification
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
EMBD  EPA/540/S-02/500 NRMRL/GWERD Library/Ada,OK 10/31/2003
NTIS  PB2003-103055 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 27 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.
Caption title. "November 2002." Includes bibliographical references (pages 26-27). "EPA/540/S-02/500."