Engineering Approach for Tier 2 RBCA Evaluations at NAPL-Contaminated Sites
Publication: Journal of Water Resources Planning and Management
Volume 127, Issue 5
Abstract
Groundwater contaminated with non-aqueous-phase liquids (NAPLs) poses human health risks and evaluation of these risks requires estimated groundwater NAPL concentrations. Site NAPL concentrations are typically evaluated using the U.S. Environmental Protection Agency's tiered risk-based corrective action (RBCA) system. Tier 1 uses conservative assumptions and little site-specific data, while tier 2 requires more detailed site-specific data. This paper presents an engineering approach that can be used to predict maximum groundwater NAPL concentrations resulting from NAPL spills. This screening tool was developed by deriving an analytical solution for a partial differential equation describing NAPL transport through the unsaturated zone. Model processes include dissolution, advection, dispersion, sorption, volatilization, and first-order degradation. Results are obtained using two nondimensional parameters and engineering plots for a wide range of conditions. A brief study is provided to demonstrate the application of the model. Because the engineering plots are easy to use and facilitate sensitivity analyses, the model is recommended for screening and RBCA tier 2 analyses.
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References
1.
Abriola, L. M. ( 1989). “Modeling multiphase migration of organic chemicals in groundwater systems—A review and assessment.” Envir. Health Perspectives, 83, 117–143.
2.
ASTM. ( 1994). “Emergency standard guide for risk-based corrective action applied at petroleum release sites.” ES 38-94, West Conshohocken, Pa.
3.
ASTM. ( 1995). “Standard guide for risk-based corrective action applied at petroleum release sites.” E 1739-95, West Conshohocken, Pa.
4.
Banerjee, S. ( 1984). “Solubility of organic mixtures in water.” Envir. Sci. and Technol., 18(8), 587–591.
5.
Bonazountas, M., and Wagner, J. M. ( 1984). “SESOIL—A seasonal soil compartment model.” Rep. Prepared for U.S. Envir. Protection Agency, Ofc. of Tox. Substances, Arthur D. Little, Cambridge, Mass.
6.
Ditkin, V. A., and Prudnikov, A. P. ( 1967). Formulaire pour le Calcul Operationnel, Masson et Cie, Editeurs, Paris (in French).
7.
Eckert, E. R. G., and Drake, R. M., Jr. ( 1959). Heat and mass transfer, McGraw-Hill, New York.
8.
El-Kadi, A. I. ( 1992). “Applicability of sharp-interface models for NAPL transport: 1. Infiltration.” Ground Water, 30(6), 849–856.
9.
Fetter, C. W. ( 1993). Contaminant hydrogeology, Macmillan, New York.
10.
Freeze, R. A., and Cherry, J. A. ( 1979). Groundwater, Prentice-Hall, Englewood Cliffs, N.J.
11.
Fried, J. J., Muntzer, P., and Zilliox, L. ( 1979). “Ground-water pollution by transfer of oil hydrocarbons.” Ground Water, 17(6), 586–594.
12.
Geller, J. T., and Hunt, J. R. ( 1993). “Mass transfer from nonaqueous phase liquids in water-saturated porous media.” Water Resour. Res., 29(4), 833–845.
13.
Green, W. H., and Ampt, G. A. ( 1911). “Studies on soil physics.” J. Agric. Sci., 4(5), 1.
14.
Hern, S. C., and Melancon, S. M. ( 1987). Vadose zone modeling of organic pollutants, Lewis, Boca Raton, Fla.
15.
Hetrick, D. M., Travis, C. C., Leonard, S. K., and Kinerson, R. S. ( 1989). “Qualitative validation of pollutant transport components of an unsaturated soil zone model (SESOIL).” Rep. No. ORNL/TM-10672, Oak Ridge National Laboratory, Oak Ridge, Tenn.
16.
Hildebrand, F. B. ( 1976). Advanced calculus for applications, Prentice-Hall, Englewood Cliffs, N.J.
17.
Howard, P. H., Boethling, R. S., Jarvis, W. F., Meylan, W. M., and Michalenko, E. M. ( 1991). Handbook of environmental degradation rates, Lewis, Boca Raton, Fla.
18.
Jury, W. A., Russo, D., Streile, G., and El Abd, H. ( 1990). “Evaluation of volatilization of organic chemicals residing below the soil surface.” Water Resour. Res., 26(1), 13–20.
19.
Jury, W. A., Spencer, W. F., and Farmer, W. J. ( 1983). “Behavior assessment model for trace organics in soil: I. Model description.” J. Envir. Quality, 12(4), 558–564.
20.
Lallemand-Barres, A., and Peaudecerf, P. ( 1978). “Recherche des Relations la Valeur de la Dispersivite Macroscopique d'un Milieu Aquifere, Ses Autres Caracteristiques et les Conditions de Mesure.” Bull. Bureau Geologique Minieres, 4(Sect. 3), 277–284 (in French).
21.
Lyman, W. J., Reidy, P. J., Levy, B., and Fan, C-Y. ( 1992). Mobility and degradation of organic contaminants in subsurface environments, C. K. Smoley, Chelsea, Mich.
22.
Mercer, J. W., and Cohen, R. M. ( 1990). “A review of immiscible fluids in the subsurface: Properties, models, characterization and remediation.” J. Contaminant Hydro., 6, 107–163.
23.
Pankow, J. F., and Cherry, J. A. ( 1996). Dense chlorinated solvents and other DNAPLs in groundwater, Waterloo, Portland, Oreg.
24.
Reible, D. D., Illangasekare, T. H., Doshi, D. V., and Malheit, M. E. ( 1990). “Infiltration of immiscible contaminants in the unsaturated zone.” Ground Water, 28(5), 685–692.
25.
Sudicky, E. A., and Huyakorn, P. S. ( 1991). “Contaminant migration in imperfectly known heterogeneous groundwater systems.” Rev. Geophysics, 29(Supplement), 240–253.
26.
Tomasko, D., Williams, G. P., Cho, E. H., and Butler, J. P. ( 1997). “Estimating maximum concentrations of soluble LNAPL components at the water table.” Argonne Nat. Lab. Rep., Argonne, Ill.
27.
Underwood, M. R., Peterson, F. L., and Voss, C. I. ( 1992). “Groundwater lens dynamics of atoll islands.” Water Resour. Res., 28(11), 2889–2902.
28.
U.S. Environmental Protection Agency (USEPA). ( 1985). “AT123D: Analytical transient one-, two-, and three-dimensional simulation of waste transport in the aquifer system.” Rep. No. ORNL-5602, Office of Toxic Substances, Oak Ridge, Tenn.
29.
U.S. Environmental Protection Agency (USEPA). ( 1994). “Drinking water regulations and health advisories.” Office of Water, Washington, D.C.
Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 127 • Issue 5 • October 2001
Pages: 324 - 332
History
Received: Aug 10, 1999
Published online: Oct 1, 2001
Published in print: Oct 2001
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