Final Treatability Study in Support of Remediation by Natural Attenuation Site FT-1 at Fairchild Air Force Base, Spokane, Washington PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This report presents the results of a treatability study performed by Parsons Engineering Science, Inc. (Parsons ES) at the FT-1 Site, Fairchild Air Force Base, Washington to evaluate remediation by natural attenuation (RNA) of dissolved fuel-hydrocarbons and chlorinated solvents in the shallow groundwater. RNA will supplement the engineered remedial actions prescribed in the Record of Decision (ROD). Residual nonaqueous-phase liquid (NAPL) present within the vadose zone and phreatic soils serves as a continuing source for the dissolved groundwater contamination. There is no evidence of mobile NAPL at this site. This study focused on the fate and transport of dissolved benzene, toluene, ethylbenzene, and xylene (BTEX) in the shallow groundwater system at the site. Dissolved chlorinated aliphatic hydrocarbons (CAHs) also are present in the shallow groundwater; therefore, the potential for RNA of these compounds was investigated as well. Site history and the results of soil and groundwater investigations conducted previously are also summarized in this report. Comparison of BTEX, CAH, electron acceptor, and biodegradation byproduct isopleth maps for Site FT-1 provides strong.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This report presents the results of a treatability study performed by Parsons Engineering Science, Inc. (Parsons ES) at the FT-1 Site, Fairchild Air Force Base, Washington to evaluate remediation by natural attenuation (RNA) of dissolved fuel-hydrocarbons and chlorinated solvents in the shallow groundwater. RNA will supplement the engineered remedial actions prescribed in the Record of Decision (ROD). Residual nonaqueous-phase liquid (NAPL) present within the vadose zone and phreatic soils serves as a continuing source for the dissolved groundwater contamination. There is no evidence of mobile NAPL at this site. This study focused on the fate and transport of dissolved benzene, toluene, ethylbenzene, and xylene (BTEX) in the shallow groundwater system at the site. Dissolved chlorinated aliphatic hydrocarbons (CAHs) also are present in the shallow groundwater; therefore, the potential for RNA of these compounds was investigated as well. Site history and the results of soil and groundwater investigations conducted previously are also summarized in this report. Comparison of BTEX, CAH, electron acceptor, and biodegradation byproduct isopleth maps for Site FT-1 provides strong.
Author: Parsons engineering science inc denver co Publisher: ISBN: Category : Languages : en Pages : 126
Book Description
This report presents the results of a treatability study (TS) performed by Parsons Engineering Science, Inc. (Parsons ES) at Building 1212, Fairchild Air Force Base, Washington to evaluate remediation by natural attenuation (RNA) of dissolved fuel-hydrocarbons in the shallow groundwater. The TS focused on the fate and transport of dissolved benzene, toluene, ethylbenzene, and xylene (BTEX) in the shallow groundwater system at the site. Residual light nonaqueous-phase liquid (LNAPL) present within the vadose zone and phreatic soils serves as a continuing source for the dissolved groundwater contamination. There is no evidence of mobile LNAPL at this site. The site history also is summarized in this report. No previous investigations have been conducted at the Building 1212 site to determine the nature and extent of soil and groundwater contamination. Comparison of BTEX, electron acceptor, and biodegradation byproduct isopleth maps for the Building 1212 site provides strong qualitative evidence of biodegradation of dissolved BTEX compounds.
Author: Publisher: ISBN: Category : Languages : en Pages : 76
Book Description
This work plan, prepared by Parsons Engineering Science, Inc. (Parsons ES), formerly Engineering-Science, Inc. (ES), presents the scope of work required for the collection of data necessary to conduct a treatability study (TS) for remediation of groundwater contaminated with petroleum hydrocarbons at Building 1212 located at Fairchild Air Force Base (AFB), 12 miles west of Spokane, Washington (the Base). Hydrogeological and groundwater chemical data collected under this program can be used to evaluate various remedial options; however, this work plan is oriented toward the collection of hydrogeological data to be used as input into groundwater flow and solute transport models in support of remediation by natural attenuation (RNA) with long-term monitoring (LTM) for restoration of groundwater contaminated with benzene, toluene, ethylbenzene, and xylene (BTEX). As used in this report, RNA refers to a management strategy that relies on natural attenuation mechanisms to remediate contaminants dissolved in groundwater and to control receptor exposure risks associated with contaminants in the subsurface. The United States Environmental Protection Agency (US EPA) Office of Research and Development (ORD) and Office of Solid Waste and Emergency Response (OSWER) define natural attenuation as: The biodegradation, dispersion, sorption, volatilization, and/or chemical and biochemical stabilization of contaminants to effectively reduce contaminant toxicity, mobility, or volume to levels that are protective of human health and the ecosystem. As suggested by this definition, mechanisms for natural attenuation of BTEX include advection, dispersion, dilution from recharge, sorption, volatilization, and biodegradation. Of these processes, biodegradation is the only mechanism working to transform contaminants into innocuous byproducts.
Author: Publisher: ISBN: Category : Languages : en Pages : 705
Book Description
This report presents the results of a treatability study performed by Parsons Engineering Science. Inc. (Parsons ES) at UST Sites 10-494, 10-495, and 10-496 (UST Site) Beale Air Force Base. California to evaluate the use of remediation by natural attlenuation (RNA) with long-term monitoring (LTM) as a remedial option for dissolved benzene. toluene. ethylbenzene, and xylene (BTEX) and total petroleum hydrocarbons as gasoline (TPH-g) contamination in the shallow groundwater. This study focused on the impact of dissolved BTEX and TPH-g compounds on the shallow groundwater system at the site. Site history and the results of soil and groundwater investigations conducted previously are also summarized in this report.
Author: Publisher: ISBN: Category : Languages : en Pages : 115
Book Description
This work plan, prepared by Parsons Engineering Science, Inc. (Parsons ES), formerly Engineering-Science, Inc. (ES), presents the scope of work required for the collection of data necessary to develop a treatability study (TS). The TS will address remediation of ground water contaminated with petroleum hydrocarbons at Sites OT-1 and SS-42 (near Building 5009) at Wurtsmith Air Force Base (Base), in Oscoda, Michigan. This work plan is oriented toward the collection of hydrogeologic and chemical data that will be used to document the occurrence of intrinsic remediation of benzene, toluene, ethylbenzene, and xylenes (BTEX) dissolved in ground water. Intrinsic remediation is a risk management strategy that relies on natural attenuation to control the risks associated with exposure to contaminants in the subsurface. However, data collected under this program will also allow for the evaluation of several remedial options, such as free product removal; bioventing for source removal; air sparging; and intrinsic remediation with long-term monitoring (LTM). This work plan was developed based on discussions among representatives from the Air Force Center for Environmental Excellence (AFCEE) Technology Transfer Division, Michigan Department of Natural Resources (MDNR), Wurtsmith AFB, and Parsons ES at a meeting at the Base on August 24, 1994.
Author: Publisher: ISBN: Category : Languages : en Pages : 396
Book Description
This report presents the results of a treatability study (TS) conducted to evaluate the use of natural attenuation for remediation of chlorinated aliphatic hydrocarbon (CAM) - contaminated groundwater at Site LF-03, F.E. Warren AFB, Wyoming. The numerical models MODFLOW and MT3D were used in conjunction with site-specific geologic, hydrologic, and laboratory analytical data to simulate the migration and biodegradation of trichloroethene (TCE) dissolved in groundwater. It is likely that contaminants were first introduced into groundwater at this site shortly after the opening of LF-03 around 1960. Solvents, fuels, and other liquid wastes may have been spilled or dumped, or have leaked from containers in the landfill. Contaminants dissolved in leachate are assumed to have entered groundwater over relatively large areas (i.e., the landfill), through point sources due to spills or dumping, or through contact between groundwater and residual non-aqueous phase liquid (NAPL) at or below the water table. Contaminants observed in groundwater at LF-03 at concentrations greater than US Environmental Protection Agency (USEPA) maximum contaminant levels (MCLs) include TCE and cis-1,2-dichloroethene (cis-1,2-DCE). The dissolved CAM plume - appears to have migrated approximately 1,500 feet northeast from the source area at LF-03. Comparison of TCE plumes delineated in 1993 and 1999 indicate that the TCE plume is stable, although TCE concentrations have increased at several locations within the plume.
Author: Publisher: ISBN: Category : Languages : en Pages : 483
Book Description
This report presents the results of a remediation by natural attenuation treatability study (RNA TS) performed by Parsons Engineering Science, Inc. (Parsons ES) at Fire Training Area 2 (FTA-2), Tinker Air Force Base (AFB), Oklahoma. The RNA TS was performed to evaluate the use of natural attenuation with long-term monitoring (LTM) as a remedial option for dissolved chlorinated aliphatic hydrocarbon (CAM) contamination in the upper saturated zone (USZ). The presence of groundwater contamination and soil contamination at the site was documented during remedial investigations performed by International Technology Corporation (IT) (1994) and Tetra Tech (TT) (1996). This TS focused on the impact of dissolved CAHs, primarily trichloroethane (TCE), on the USZ groundwater system at, and downgradient from, the site. Site history and the results of soil and groundwater investigations conducted previously also are summarized in this report.
Author: Publisher: ISBN: Category : Languages : en Pages : 703
Book Description
This report presents the results of a treatability study for remediation by natural attenuation (RNA TS), completed by Parsons Engineering Science, Inc. (Parsons ES) at IRP Site SS-04, Langley Air Force Base (AFB), Virginia. The TS evaluates the use of natural attenuation with long-term monitoring (LTM) as a remedial option for dissolved hydrocarbon fuel constituents in groundwater. The occurrence of groundwater and soil contamination at the site, as a consequence of leakage of petroleum-based fuel (jet fuel or JP-4), has been documented during previous investigations. This TS focuses primarily on the impact of dissolved fuel constituents, in particular benzene, toluene, ethylbenzene, and xylene isomers (BTEX), in the groundwater system at, and downgradient from, the source area. Residual fuel hydrocarbon contamination in soil surrounding the source area (the abandoned USTs) was remediated from 1992 through 1996 with a vapor extraction system. The site history and the results of previously- completed soil and groundwater investigations are summarized in this report. Soil and groundwater samples were collected from the site and analyzed to obtain the information necessary for the transport evaluation and RNA demonstration. Physical and chemical data collected under this program were supplemented (where necessary) with data collected during previous site characterization investigations and monitoring events. Biodegradation of fuel hydrocarbons can occur when an indigenous population of hydrocarbon-degrading microorganisms is present in the subsurface, and sufficient concentrations of electron acceptors, nutrients, and electron donors (including fuel hydrocarbons) are available to these organisms. Several lines of chemical and geochemical evidence indicate that dissolved BTEX constituents are undergoing biodegradation within and downgradient from the contaminant source area.
Author: Publisher: ISBN: Category : Languages : en Pages : 559
Book Description
This report was prepared by Parsons Engineering Science, Inc. (Parsons ES), formerly Engineering-Science Inc. (ES) and presents the results of a treatability study (TS) conducted to evaluate remediation by natural attenuation (RNA) of fuel-hydrocarbon- and chlorinated-solvent-contaminated groundwater in Zone 1 at Westover Air Reserve Base (ARB), Chicopee, Massachusetts. Zone 1 encompasses sites SS-16, SS-19, and WP-15. The main emphasis of the work described herein was to evaluate the effectiveness of RNA with long-term monitoring (LTM) for restoration of groundwater contaminated with benzene, toluene, ethylbenzene, and xylenes (BTEX). Additional fuel hydrocarbon and chlorinated solvent compounds were identified as chemicals of concern (COCs) for Zone 1; therefore, the potential for natural attenuation mechanisms to effectively reduce low, dissolved concentrations of these compounds in site groundwater also was qualitatively considered.
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