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In situ radio-frequency heating (ISRFH) combined with soil vapor extraction was demonstrated at a contaminated field site of a former hydrotreatment plant in Zeitz near Leipzig. The project was carried out in several phases including cold soil vapor extraction for comparison. During the test, a soil volume of about 300 m3 was heated to an average temperature of 54 °C. As expected, the extraction rate for hydrocarbons (especially the main contaminant benzene) was markedly enhanced by soil heating. Furthermore, microbial degradation of organic compounds was supported. Although a total amount of approximately 1.4 t of hydrocarbons was removed from the soil, the demonstration project was not aimed at complete remediation of the site. Conditions limiting the extent of cleanup are discussed in detail and conclusions for an efficient application of ISRFH in soil remediation are derived whereas experiences from other sites are also implied.

In situ radio-frequency heating (ISRFH) was successfully applied during remediation of a former petrol station. Using a three-electrode array in combination with extraction wells for soil vapor extraction (SVE), pollution consisting mainly of benzene, toluene, ethylbenzene, xylenes, and mineral oil hydrocarbons (in total about 1100 kg) was eliminated from a chalk soil in the unsaturated zone. Specially designed rod electrodes allowed selective heating of a volume of approximately 480 m3, at a defined depth, to a mean temperature of about 50 °C. The heating drastically increased the extraction rates. After switching off ISRFH, SVE remained highly efficient for some weeks due to the heat-retaining properties of the soil. Comparison of an optimized regime of ISRFH/SVE with conventional “cold” SVE showed a reduction of remediation time by about 80 % while keeping the total energy consumption almost constant.

In situ electrical heating of soil was studied applying different frequencies: low-frequency energy for resistive heating and radio-frequency energy for dielectric heating. Steep temperature gradients were observed for each heating mode under the condition of the coexistence of saturated and unsaturated soil zones. By combining the two heating modes, this undesired effect can be avoided, thus allowing efficient soil remediation especially when organic phases are accumulated at the capillary fringe. A parallel application of both frequencies was demonstrated as the most suitable method to reduce temperature gradients. By using electronic filters, both electric fields can be established by only one electrode array. This innovative concept is especially applicable for optimizing thermal remediation of light non-aqueous phase liquid contaminations or realizing thermally-enhanced electrokinetic removal of heavy metals.

Radio-frequency heating to enhance soil decontamination requires adjusted solutions for the electrode design depending on scale and remediation technique. Parallel plate electrodes provide widely homogeneous field and temperature distributions and are, therefore, most suitable for supporting biodegradation processes. For thermally enhanced soil vapor extraction, certain temperature gradients can be accepted and, therefore, the less-demanding geometry of rod-shaped electrodes is usually applied. For electrode lengths of some meters, a design with an air gap has to be used in order to focus heating to the desired depth. Perforated rod electrodes may be simultaneously employed as extraction wells. Placing an oxidation catalyst in situ within the electrodes is an option for handling of highly loaded air flows. Coaxial antenna may be utilized to selectively heat soil compartments far from the surface of the soil.

The methodology, case-study examples, and recommendations described in this report are intended to provide restoration program managers, their support staff, and the regulatory community with descriptions of methods and tools that can be used to advance the state-of-practice for monitoring and documenting the long-term sustainability of monitored natural attenuation (MNA)-based remedies for chlorinated solvent-impacted groundwater. Specifically, this report 1) presents a strategy and framework for quantitatively assessing the sustainability of MNA-based remedies for groundwater at chlorinated solvent-impacted sites, 2) provides case-study reviews using existing long-term monitoring (LTM) data sets from multiple United States Air Force sites where chlorinated solvents exceed closure criteria, and 3) summarizes observations and recommendations that were developed when working through the case-study examples., Task order no. 0024.

This document provides a summary of soil bioventing procedures with an emphasis on pilot testing and the long-term monitoring of lull-scale bioventing systems. The document is intended for use by engineers and scientists who are responsible for planning or conducting soil remediation projects using in situ bioventing methods. The document is an updated version of earlier AFCEE bioventing protocols., The original document contains color images.

Bioslurping is a demonstrated technology for removing light, nonaqueous-phase liquid (LNAPL) from contaminated aquifers. It combines vacuum-assisted LNAPL recovery with bioventing and soil vapor extraction (SVE) to simultaneously recover LNAPL and bioremediate the vadose zone. A conventional bioslurper system withdraws free-phase LNAPL from the water table, groundwater, and soil vapor in a single process stream, using the air lift created by an aboveground liquid ring pump. The recovered LNAPL is separated from the groundwater and may be recycled. The recovered groundwater and soil vapor usually are treated and discharged. Because bioslurping enhances LNAPL recovery in comparison to conventional skimming and pump-drawdown technologies, bioslurping potentially can save the U.S. Department of Defense (DoD) significant funds by reducing the amount of time required to remediate LNAPL-contaminated sites., The original document contains color images.

This report is for ESTCP Project CU-9908. The project demonstrated and validated two innovative prepump modifications to a conventional bioslurper system: an in-well "dual drop tube" extraction system and a modified aboveground knockout tank design. These modifications are meant to reduce operation and maintenance costs associated with the simultaneous extraction of fuel with groundwater by a conventional system, which utilizes a single drop tube in-well vacuum extraction system without a prepump knockout tank. The "dual drop tube" consists of two in-well vacuum drop tubes separated by a fuel isolation sleeve, which extends 1 to 3 feet both above and below the end of the main drop tube. This tubular sleeve prevents the extraction of fuel by the main drop tube, while allowing groundwater and soil gas to enter. A smaller vacuum drop tube, located outside the sleeve, is used to remove accumulating fuel separately, using the bioslurper system pump vacuum and a separate storage vessel. Conventional systems promote extensive emulsification of fuel with groundwater and foam formation resulting from fuel-water mixtures moving through the vacuum manifold system and liquid ring vacuum pump. The "dual drop tube" and prepump knockout tank separators were operated both alone and in series at eight field sites (2- to 5-week demonstrations) and cost and performance data were obtained by a long-term demonstration (15 weeks) at NAS Fallon, Nevada. The dual drop tube separator removed all emulsions and foam and 99% of TPH from the vacuum pump discharge. Cost data are included in the report., The original document contains color images. All DTIC reproductions will be in black and white. Prepared in cooperation with Battelle; Intergraph Corp.

This report summarizes the results of a demonstration of selected technologies used to treat groundwater contaminated with dissolved MTBE and other VOCs. The specific technologies include Spray Aeration Vacuum Extraction (SAVE), developed by Remediation Service International (RSI), and Hollow Fiber Membrane (HFM) degasification, developed by the University of California at Santa Barbara. The test was conducted at the Hydrocarbon National Test Site located at the Naval Construction Battalion Center at Port Hueneme, California, between 21-25 June 1999. The project scope consisted of demonstrating the combined SAVE and HFM systems at the field scale for treating groundwater contaminated with MTBE and other gasoline components. The main objectives were to: (1) meet a target remediation goal of 5 ug/L for MTBE (the secondary drinking water standard for California water supplies); (2) quantitatively define the component-by- component performance in terms of removal efficiency and mass transfer coefficient for each technology; (3) evaluate these treatment technologies from a cost-and-performance perspective; and (4) develop a set of recommendations for routine application of this combination of remediation technologies. During the 5-day demonstration effort, approximately 34,200 L (9,000 gallons) of contaminated groundwater was treated while continuously meeting the project's MTBE clean up goal of 5 ug/L. Specific operation and performance details are presented and discussed, as well as suggestions for design improvement.

Long-term performance of vapor-phase bioreactors can be unreliable because of uneven distribution of biomass and microbial activity throughout the bioreactors. One method to improve biomass distribution and maintain high removal efficiencies for continuous long-term use is to operate the bioreactor in a directionally-switching (DS) mode, in which the contaminant inlet is periodically switched between the top and bottom of the reactor column. The objective of this study was to evaluate the effect of DS operation on biomass distribution and activity., Presented at Annual Meeting and Exhibition of the Air and Waste Management Association (92nd), St. Louis, MO, 20-24 Jun 1999.

McClellan Air Force Base (AFB) is a National Test Location designated through the Strategic Environmental Research and Development Program (SERDP), and was selected as the candidate test site for a demonstration of soil vapor extraction (SVE) off-gas treatment technology. A two-stage reactor system was employed for the treatment of the off-gas. The biological treatment was conducted at Operable Unit (OU) D Site S, located approximately 400 ft southwest of Building 1093. The SVE system at this area normally operates at a nominal volumetric flowrate of approximately 500 to 600 standard cubic feet per minute (scfm). The contaminated air stream from the SVE system that was fed to the reactor system operated at a flowrate of 5 to 10 scfm. The demonstration of this reactor system started with the mobilization of field equipment and personnel in November 1997. The two-stage reactor system consisted of a fixed-film biofilter followed by a completely mixed (by continuous stirring), suspended-growth biological reactor. This reactor configuration was based on a review of the literature, on characterization of the off-gas from the SVE system being operated at McClellan AFB, and on the results of the laboratory study recently conducted by Battelle and Envirogen for this study (Battelle and Envirogen, 1997c). The demonstration was run for approximately 18 weeks. This final demobilization and decommissioning of the pilot-scale reactor unit was completed on April 30, 1998.

Under contract to AFCEE, Parsons ES collected cost and performance data to determine the applicability of using flameless thermal oxidation (FTO) technology for treatment of extracted soil vapors containing chlorinated and non-chlorinated volatile organic compounds (VOCs) at three Air Force sites.

The Air Force Center for Environmental Excellence (AFCEE) has sponsored an ongoing program to promote the use of cost-effective soil vapor treatment technologies in conjunction with soil vapor extraction (SVE) for remediation of fuel- and solvent-impacted sites. On September 20, 1995, Parsons Engineering Science, Inc. (Parsons ES) received formal notice to proceed from HSD/PKVDA at Brooks Air Force Base (AFB) under Contract F41624-94-D-8136, Delivery Order 28, to implement a statement of work (SOW) that outlines requirements to provide services to support environmental air conformity through evaluation of the flameless thermal oxidation (FTO) vapor-phase treatment technology for SVE off-gas abatement at various Air Force base sites worldwide. Thermatrix, Inc. (Thermatrix) of Knoxville, Tennessee is an AFCEE directed subcontractor providing the FTO treatment system to be evaluated during the demonstrations. Thermatrix was selected in the Broad Agency Announcement (BAA) for Technology Demonstration for technology evaluation and cost performance of their GS Series FTO system. A technology demonstration was designed by Parsons ES to determine the applicability of using FTO technology for treatment of extracted soil vapors containing chlorinated and non-chlorinated volatile organic compounds (VOCs). Three Air Force installations were identified for demonstrating the FTO system, including Building 181 at AFP 4, Fort Worth, Texas, which is the subject of this report.

The Air Force Center for Environmental Excellence (AFCEE) has sponsored an ongoing program to promote the use of cost-effective soil vapor treatment technologies in conjunction with soil vapor extraction (SVE) for remediation of fuel- and solvent-impacted sites. On September 20, 1995, Parsons Engineering Science, Inc. (Parsons ES) received formal notice to proceed from HSD/PKVDA at Brooks Air Force Base (AFB) under Contract F41624-94- D-8136, Delivery Order 28, to implement a statement of work (SOW) that outlines requirements to provide services to support environmental air conformity through evaluation of the flameless thermal oxidation (FTO) vapor-phase treatment technology for SVE off-gas abatement at various Air Force base sites worldwide. Thermatrix, Inc. (Thermatrix) of Knoxville, Tennessee is an AFCEE-directed subcontractor providing the FTO treatment system to be evaluated during the demonstrations. Thermatrix was selected through the Broad Agency Announcement (BAA) that included demonstrations for evaluation of cost and performance of their GS Series FTO system. A technology demonstration was designed by Parsons ES to determine the applicability of using FTO technology for treatment of extracted soil vapors containing chlorinated and non-chlorinated volatile organic compounds (VOCs). Three Air Force installations were identified for FTO system demonstrations, including the Source Area Reduction System (SARS) at the former Lowry AFB, Colorado. The results of the FTO system demonstration at the SARS are summarized in this report.

The Civil and Environmental Engineering Department of the University of Massachusetts at Amherst (UMASS) was contracted by the United States Air Force Center for Environmental Excellence (AFCEE) to conduct field research from 19 September 1995 to 30 September 1996 under Contract No. F41624-95-C-8012 "Surface Emissions from Jet Fuel Bioventing at Plattsburgh AFB". The work focused on bioventing of residual JP4 jet fuel and chlorinated solvents in the unsaturated zone and capillary fringe beneath Fire Training Area FT-002 at the Air Force Base in Plattsburgh, NY. UMASS tested the hypothesis that natural attenuation processes, stimulated by injected air, reduce emissions of hydrocarbons and trichloroethylene vapors to acceptable air quality standards at the site. Drs. David W. Ostendoff, Alan J. Lutenegger, and Sarina J. Ergas were the UMASS Principal Investigators, while Patrick Haas served as AFCEE Technical Representative for the contract. This report describes the one year effort. The contract was performed in four tasks: unsaturated zone characterization, soil gas and solid core sampling, maximum assimilative capacity testing, and emissions testing. UMASS completed this work through detailed subtasks, J. P. Tehrany, Paul O. Reyes, Rebecca C. Glass, Benjamin Charkhow, Michelle M. Meyer, Shawn P. Kelley, and Travis J. Mitchell.

This Final Work Implementation Plan (WIP) describes the planned activities and procedures for a 3 Fluidized Bed Adsorption (FBA)1 performance test under a Program Research and Development Announcement (PRDA) at McClellan Air Force Base (McClellan AFB), Sacramento, California. This 5 document presents the test objectives, test procedures, sampling and analytical methods, quality 6 assurance/quality control (QA/QC) procedures, and health and safety issues related to the PRDA test. This 7 document addresses comments to the draft WIP as identified in the Response to Comments table, 8 Appendix E.

The SVE and vapor-phase treatment demonstration was performed at Plattsburgh AFB, New York, Site FT-002, from August 27, 1996 through March 25, 1997. The technology demonstration was conducted over a 30-week period, and soil vapors were extracted from 14 site wells. The FTO system was tested using individual wells, or pairs of wells for a period of up to 2 weeks per well (or well pair) to determine the optimum vacuum/extraction flow rate balance among all wells and soil vapor concentrations from each of the wells. The 30-week demonstration served two primary purposes: 1) evaluation of the FTO technology, and 2) collection of test data to support the design and operation of a full-scale SVE system that was installed at Site FT-002 by OHM Remediation Services, Inc. (OHM) in 1996. The FTO technology demonstration was performed in accordance with the Final Work Plan for the Evaluation of Flameless Thermal Oxidation at Plattsburgh Air Force Base (the work plan) (Parsons ES, 1996a), and the Addendum to the FTO work plan (Parsons ES, 1996c). The purpose of the site-specific technical report is to evaluate the effectiveness of the FTO system during the Site FT-002 field demonstration and to summarize FTO system performance, operational costs and reliability, and evaluate full-scale treatment system application for the site FT-002.

In May 1996 Offutt Air Force Base (AFB) and Radian Corporation (Radian) completed a seven-day pilot study test using low-vacuum dual-phase extraction, (LVDPE), a multi-phase extraction (MPE) technology. This report provides a summary of the methodology used during the test, the test results, and base-specific recommendations. Section 1.0 presents the project background, site background, and purpose and objectives of this document.

The Air Force Armstrong Laboratory, Tyndall Air Force Base, Florida, has supported the research and development of Radio Frequency Soil Decontamination. Radio frequency soil decontamination is essentially a heat-assisted soil vapor extraction process. Site S-1 at Kelly Air Force Base, Texas, was selected for the demonstration of two patented techniques. The site is a former sump that collected spills and surface runoff from a waste petroleum, oils, and lubricants and solvent storage and transfer area. In 1993, a technique developed by the ITT Research Institute using an array of electrodes placed in the soil was demonstrated. In 1994, a technique developed by KAI Technologies, Inc. using a single applicator placed in a vertical borehole was demonstrated. Approximately 120 tons of soil were heated during each demonstration to a temperature of about 150 degrees Celsius., ADA327886 ADA327887 ADA327889

The Air Force Armstrong Laboratory, Tyndall Air Force Base, Florida, has supported the research and development of Radio Frequency Soil Decontamination. Radio frequency soil decontamination is essentially a heat-assisted soil vapor extraction process. Site S-1 at Kelly Air Force Base, Texas, was selected for the demonstration of two patented techniques. The site is a former sump that collected spills and surface runoff from a waste petroleum, oils, and lubricants and solvent storage and transfer area. In 1993, a technique developed by the ITT Research Institute using an array of electrodes placed in the soil was demonstrated. In 1994, a technique developed by KAI Technologies, Inc. using a single applicator placed in a vertical borehole was demonstrated. Approximately 120 tons of soil were heated during each demonstration to a temperature of about 150 degrees Celsius., ADA327886 ADA327887 ADA327888

The Air Force Armstrong Laboratory, Tyndall Air Force Base, Florida, has supported the research and development of Radio Frequency Soil Decontamination. Radio frequency soil decontamination is essentially a heat-assisted soil vapor extraction process. Site S-1 at Kelly Air Force Base, Texas, was selected for the demonstration of two patented techniques. The site is a former sump that collected spills and surface runoff from a waste petroleum, oils, and lubricants and solvent storage and transfer area. In 1993, a technique developed by the ITT Research Institute using an array of electrodes placed in the soil was demonstrated. In 1994, a technique developed by KAI Technologies, Inc. using a single applicator placed in a vertical borehole was demonstrated. Approximately 120 tons of soil were heated during each demonstration to a temperature of about 150 degrees Celsius., ADA327886 ADA327888 ADA327889

This technology demonstration was completed to determine the feasibility of using an ultraviolet (UV) oxidizing catalyst in the presence of ozone to treat non-chlorinated, fuel hydrocarbon volatile organic compounds (VOCs). The soil vapor extraction (SVE) and treatment demonstration was conducted at the Installation Restoration Program (IRP) Site SS-20 located at Myrtle Beach Air Force Base (AFB), Myrtle Beach, South Carolina. Site SS-20, locally known as the MOGAS site, was previously investigated under the IRP and known to be contaminated with gasoline residuals. This demonstration was conducted from 10 November to 20 December 1996 and was performed as part of an ongoing innovative technologies evaluation program sponsored by the Air Force in order to promote cost-effective vapor treatment technologies at contaminated sites. The technology demonstration was performed in accordance with the 'Treatability Study Test Design for ULTROX(registered) UV/Oxidation System Pilot Scale Treatability Testing at Myrtle Beach AFB, Myrtle Beach, SC.' (Zimpro, ULTROX Division, September, 1995) as approved by the Air Force and regulatory agencies.

This decision document presents the selected soil remedial action for the AANG Base in Tucson, Arizona. The remedial action was chosen in accordance with the Comprehensive Environmental Response Compensation and Liability Act (CERCLA), as amended by the Superfund Amendments and Reauthorization Act (SARA), and to the extent practicable, the National Contingency Plan (NCP). This decision is based on the administrative record for this site. The State of Arizona and the United States Environmental Protection Agency, Region IX concur on the selected remedy.

Naturally occurring contaminant attenuation processes such as advection, dispersion, aerobic biodegradation, and anaerobic biodegradation can significantly enhance the rate of organic mass removal from contaminated groundwater aquifers. The Air Force and EPA are currently collaborating to research natural attenuation processes and develop natural attenuation as an effective remedial alternative for appropriate sites. At the Building 735 site at Grissom AFB, data from site investigations (Section 2) was used to conduct a natural attenuation Treatability Study (Section 3) that included special field sampling and analysis and groundwater modeling components. The results from this study were used to perform a baseline exposure assessment and Risk Assessment for the site (Section 4). Finally, all of these data were used to prepare a Focused Feasibility Study (Section 5) that evaluated three remediation alternatives for the site: 1) natural attenuation with institutional controls, 2) natural attenuation combined with continued operation of an existing bioventing/air sparging system; and 3) installation of an aquifer dewatering/soil vapor extraction system.

This document summarizes the results of the evaluation of an elastomeric polymer filter media (PetroLOK PL22) for the treatment of volatile organic compounds in offgas. The evaluation included conducting a treatability study at the soil vapor extraction and offgas treatment system in Operable Unit C1 at McClellan Air Force Base. This work was accomplished as part of the Environmental Process Improvement Center partnership between Cal/EPA, U.S. EPA, and McClellan Air Force Base, and was also conducted in cooperation with the Public Private Partnership, Clean Sites, and the U.S. EPA Technology Innovation Office and Superfund Innovative Technology Evaluation Program.

Site 5559 at Dover Air Force Base, Delaware is under investigation for the remediation of ground water which was contaminated by a system of industrial waste basins operated to the north of this area and maintenance activities associated with the Paint Washout Area. The secondary basins of this system were closed in 1986 under RCRA. The primary chemicals of concern at Site SS59 include chlorinated-VOCs (e.g., DCE, TCE, TCA) and hydrocarbon compounds (e.g., BTEX). As part of the Department of Defense Installation Restoration Program, a Feasibility Study was completed for the site in September of 1994 by EA Engineering, Science, and Technology. Remedial Actions at Site SS59 will be addressed as part of the Area 6 investigation at Dover Air Force Base.

A treatability study was conducted to evaluate whether the Enhanced Deep Soil Vapor Extraction Process (EDSVEP) is practicable for the removal of low volatility compounds from unsaturated subsurface soils. Test results indicate that EDSVEP may be an effective in situ alternative for the remediation of subsurface soils contaminated with low volatility compounds. However, depending on site-specific conditions and remediation goals, this technology should be fully compared with other remedial alternatives. Based on the treatability study results, preliminary evaluation and economic analysis of a full-scale system has been provided. An objective of this study was to determine the appropriate balance between extraction and injection flow rates such that the injection rate may be maximized while containing and recovering the injected air. Helium tracer tests were utilized to evaluate the subsurface flows and injected air recovery rates. The helium tracer tests proved to be a useful tool for evaluating subsurface flow conditions and determining the appropriate flow ratios. In addition, tracer tests conducted during soil heating were used to improve operating conditions as the test progressed.

Pursuant to reporting obligations under Contract No. F3O636-91-C-O154 (EA Project No. 60343.04), EA hereby submits five copies of the Quarterly Sampling Report for the operational quarter January-March 1994. This report contains raw laboratory data from the quarterly sampling event conducted on 31 January 1994 (Appendix A). Also presented are results from ambient air and air stripper exhaust sampling (AS-05-03, AS-07-03) conducted 2 March 1994 (Appendix B). Surface water (Weapons Storage Area WSA stream) analytical results (SW-08-02) and spent granular activated carbon (AC-11-02) analyses conducted on 31 March 1994 are presented in Appendix C.

This document supports the use of soil vapor extraction (SVE) as the non-time-critical removal for selected areas with high levels of volatile organic compound (VOC) contamination in Investigation Cluster 1 (IC 1), which is located near the center of Operable Unit B (OU B). This SVE removal action is part of the initial basewide SVE removal action at McClellan Air Force Base (McAFB). The principal objective of basewide SVE removal actions is to achieve early risk reduction by removing a significant quantity of VOCs from soils in the vadose zone, intercepting an exposure pathway, or preventing additional flow to groundwater. This document is a comparison to the Basewide Engineering Evaluation-Cost Analysis (EE/CA) General Evaluation Document. The General Evaluation Document provides the long-term plan to standardize and streamline the use of SVE removal actions at McAFB by establishing SVE as the presumptive remedy for McAFB; outlining a site selection methodology for SVE removal actions, and providing a general SVE system configuration and cost estimate., Original contains color plates. All DTIC/NTIS reproductions will be in black and white.

This Soil Vapor Extraction Pilot Study Report for the Motor Pool Area at the Rocky Mountain Arsenal (RMA) is being prepared as part of the Interim Response Action (IRA). The recommended action at the motor pool area was to address contaminated soil with in situ soil vapor extraction and to address contaminated groundwater. This document presents the results of the soil vapor extraction pilot study conducted between July and December 1991 at the motor pool area.

The health and safety program for personnel working at McClellan Air Force Base (McAFB), California, consists of a base site safety plan (SSP) and task specific amendments. The base SSP contains general information that applies to all or most areas of the site. The base ssp contains; the project description, personnel responsibilities, site hazards, personal protective equipment (PPE), air monitoring guidelines, site control, decontamination procedures, and an emergency response plan. Predominant functions at McAFB have been to manage, maintain, and repair aircrafts, missiles, space vehicles, electronics, and communication equipment. These operations have required the use of toxic and hazardous materials. Some of the hazardous materials that have been used or generated on the base include: industrial solvents and caustic cleaners, electroplating waste heavy metals, oils contaminated with polychlorinated biphenyls, contaminated jet fuels, low-level radioactive wastes, unused chemicals, oils and lubricants. Characterization recovery and remediation of areas affected by waste disposal practices are ongoing. Contaminated drill cuttings and purge water will be generated during field activities. Purge water will be disposed of at the industrial waste water treatment plant (IWTP) or ground water treatment plant. Drill cuttings and contaminated soils will be handled in accordance with the McAFB Soils Management Plan.

This sampling and analysis plan (SAP) describes procedures developed for the treatability investigation of soil vapor extraction (SVE) at Site S at the McClellan Air Force Base near Sacramento, California. The purpose of the treatability investigation is to develop sufficient field and operational data to assess the applicability of SVE technology in removing site-specific contaminants at the base. Site S is one of 12 waste disposal sites identified as a former fuel and solvent disposal pit. Primary objectives of the sampling and analysis efforts are to: (1) Assess the nature and extent of vadose zone soil contamination; (2) Evaluate the in situ permeability of vadose zone soils; (3) Obtain site-specific field data for design of the pilot-scale SVE system; and (4) Evaluate the effectiveness and implementability of SVE for site remediation and recovery.

The United States Air Force (USAF) is conducting a study at the McClellan Air Force Base to assess the nature and extent of contamination resulting from past practices and spills on the base and to plan for the remediation of identified areas of contamination. This project discusses activities related to the treatability investigation to assess the viability and effectiveness of in situ soil vapor extraction (SVE) as a tool for remediation and recovery at the McClellan AFB. The treatability investigation will include a site characterization study, an in situ air permeability test, and an SVE pilot test. Sampling includes soil borings samples, air permeability testing and SVE pilot testing. Analytical methodology includes identification of volatile organic compounds from canister air sampling.