The objective of this report is to document pretest and post-test data collected in support of the rf heating demonstration. The purpose of the third phase was to more » evaluate the use of heating technologies to enhance the removal of contamination from clay layers where mass transfer is limited. The second phase focused on the enhancement of the in situ air stripping process by adding selected nutrients to stimulate naturally occurring microorganisms that degrade VOCs. The first phase of the demonstration focused on the application and development of in situ air stripping technologies to remediate sediments and groundwater contaminated with volatile organic compounds (VOCs). The overall objective of the Integrated Demonstration Project for the Remediation of Organics at Nonarid Sites at the Savannah River Site (SRS) is to evaluate innovative remediation, characterization, and monitoring systems to facilitate restoration of contaminated sites. New technologies for environmental characterization that were evaluated include depth discrete groundwater sampling (HydroPunch) and three-dimensional modeling of contaminant data. These data will be combined with data collected after the demonstration in order to evaluate the effectiveness of in-situ air stripping. The distribution of contaminants in soils and sediments in the saturated zone and groundwater is emphasized. The objective of this report is to provide baseline information on the geology, geochemistry, hydrology, and microbiology of the more » demonstration site prior to the test. Phase I of the Integrated Demonstration focused on the application and development of in-situ air stripping technologies to remediate soils and sediments above and below the water table as well as groundwater contaminated with volatile organic contaminants. This demonstration utilizes directionally drilled horizontal wells to deliver gases and extract contaminants from the subsurface. The Savannah River Site is the location of an Integrated Demonstration Project designed to evaluate innovative remediation technologies for environmental restoration at sites contaminated with volatile organic contaminants. « lessĪuthors: Eddy Dilek, C A Looney, B B Hazen, T C Nichols, R L Fliermans, C B Parker, W H Dougherty, J M Kaback, D S Simmons, J L Publication Date: Research Org.: Westinghouse Savannah River Co., Aiken, SC (US) Sponsoring Org.: USDOE, Washington, DC (US) OSTI Identifier: 10188930 Report Number(s): WSRC-TR-93-369 ON: DE94001229 ON: DE94001229 TRN: AH200135%%357 DOE Contract Number: AC09-89SR18035 Resource Type: Technical Report Resource Relation: Other Information: Supercedes report DE94001229 PBD: Jul 1993 PBD: Country of Publication: United States Language: English Subject: 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS 54 ENVIRONMENTAL SCIENCES DEMONSTRATION PROGRAMS GEOCHEMISTRY GEOLOGY HYDROLOGY ORGANIC COMPOUNDS SAVANNAH RIVER PLANT GROUND WATER REMEDIAL ACTION IN-SITU PROCESSING AERATION BIOCHEMISTRY VOLATILE MATTER REMOVAL SOILS GAS INJECTION METHANE PERFORMANCE 054000 540220 540250 HEALTH AND SAFETY CHEMICALS MONITORING AND TRANSPORT SITE RESOURCE AND USE = , The post-test characterization activities discussed herein include results from the analysis of sediment samples, three-dimensional images of more » the pretest and post-test data, contaminant inventories estimated from pretest and post-test models, a detailed lithologic cross sections of the site, results of aquifer testing, and measurements of geotechnical parameters of undisturbed core sediments. Characterization activities focused on documenting the nature and distribution of contamination in the subsurface. The field conditions documented herein represent the baseline status of the site for evaluating the in situ bioremediation as well as the post-test conditions for the in situ air stripping demonstration. The field site and horizontal wells were subsequently used for an in situ bioremediation demonstration during which methane was added to the injected air. The demonstration successfully removed significant quantities of solvent from the subsurface. The demonstration was designed to remediate soils and sediments in the unsaturated and saturated zones as well as groundwater contaminated with volatile organic compounds. The in situ air stripping system consisted of two directionally drilled wells that delivered gases to and extract contamination from the subsurface. The demonstration of in situ air stripping was the first in a series of demonstrations of innovative remediation technologies for the cleanup of sites contaminated with volatile organic contaminants. A full-scale demonstration of the use of horizontal wells for in situ air stripping for environment restoration was completed as part of the Savannah River Integrated Demonstration Program.
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