Record Display for the EPA National Library Catalog


Main Title Development of a data evaluation/decision support system for remediation of subsurface contamination /
Author Eisenberg, Freddi. ; McLaughlin, D. B.
CORP Author Massachusetts Inst. of Tech., Cambridge. Ralph M. Parsons Lab.;Environmental Protection Agency, Washington, DC. Office of Research and Development.
Publisher U.S. Environmental Protection Agency, Office of Research and Development,
Year Published 2001
Report Number EPA/600/R-01/044
Stock Number PB2002-101966
OCLC Number 49573057
Subjects Hazardous waste site remediation ; Groundwater--Pollution--Measurement ; Soil pollution--Measurement
Additional Subjects Remediation ; Literature reviews ; Problem formulations ; Estimation equiations ; Measurement strategies ; Ground water ; Chemicals ; Data evaluation ; Decision support systems ; Subsurface contamination
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-R-01-044 Headquarters Library/Washington,DC 07/15/2009
ELBD ARCHIVE EPA 600-R-01-044 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-R-01-044 AWBERC Library/Cincinnati,OH 04/26/2010
EMBD  EPA/600/R-01/044 NRMRL/GWERD Library/Ada,OK 05/17/2002
ERAD  EPA 600/R-01-044 HWC 2 copies Region 9 Library/San Francisco,CA 03/25/2016
ESAD  EPA 600-R-01-044 Region 10 Library/Seattle,WA 10/31/2003
NTIS  PB2002-101966 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xi,55 p. : col. ill. ; 28 cm.
Subsurface contamination frequently originates from spatially distributed sources of multi-component nonaqueous phase liquids (NAPLs). Such chemicals are typically persistent sources of ground-water contamination that are difficult to characterize. This work addresses the feasibility of using dissolved concentration measurements to estimate the spatial distribution of each component of an immobile (or residual) NAPL mixture in a saturated field-scale system. We pose the characterization process as a state estimation problem.The estimated states are the dissolved contaminant concentrations and the NAPL saturations. These states vary with time and space. The time-dependence of solute concentrations originating from competitive dissolution is, in fact, an important source of information for the estimation process. The estimated parameters are the mass transfer rate coefficients that govern the transfer of constituents between the NAPL and dissolved phases. In the present analysis, we assume that all other states (hydraulic head, organic matter distribution coefficient) and parameters (hydraulic conductivity, dispersion coefficients, specific storage) are known and certain (not random variables). The state equations used in the estimation process account for competitive dissolution from a multi-component source, ground-water flow in a heterogeneous medium, and dissolved phase contaminant transport. We assume mass exchange of the NAPL constituents among the dissolved, sorbed, and NAPL phases. Dissolution at the local scale is assumed to be at chemical equilibrium. However, we represent this process at the field scale with a first order kinetic model. A linear measurement equation relates dissolved concentration measurements to the estimated states and parameters. This equation includes an additive Gaussian error term.
"July 2001." Includes bibliographical references (p. 53-55). "EPA/600/R-01/044."