| Abstract: | A method is developed for optimizing monitored natural attenuation (MNA) and the reduction in the aqueous source zone concentration (??C) required to meet a site-specific regulatory target concentration. The mathematical model consists of two one-dimensional equations of mass balance for the aqueous phase contaminant, to coincide with up to two distinct zones of transformation, and appropriate boundary and intermediate conditions. The solution is written in terms of zone-dependent Peclet and Damko??hler numbers. The model is illustrated at a chlorinated solvent site where MNA was implemented following source treatment using in-situ chemical oxidation. The results demonstrate that by not taking into account a variable natural attenuation capacity (NAC), a lower target ??C is predicted, resulting in unnecessary source concentration reduction and cost with little benefit to achieving site-specific remediation goals. |
| Genre: | Conference Paper |
| ProdID: | 70025322 |
| Citation Author: | Widdowson, M. A.; Chapelle, F. H.; Brauner, J. S. |
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| Citation Editor: | Mishra S.Mishra S. |
| Citation End Page: | 178 |
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| Citation Language: | English |
| Citation Larger Work Title: | Groundwater Quality Modeling and Management Under Uncertinity |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Analytical method for optimal source reduction with monitored natural attenuation in contaminated aquifers; 2003; Conference Paper; Groundwater Quality Modeling and Management Under Uncertinity; Widdowson, M. A.; Chapelle, F. H.; Brauner, J. S. |
| Citation Start Page: | 172 |
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| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Analytical method for optimal source reduction with monitored natural attenuation in contaminated aquifers; 2003; Conference Paper; Groundwater Quality Modeling and Management Under Uncertinity; Widdowson, M. A.; Chapelle, F. H.; Brauner, J. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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