Tri-Service Site Characterization and Analysis Penetrometer System (SCAPS) Validation of the Hydrosparge Volatile Organic Compound Sensor PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Site characterization for subsurface contaminants is time consuming and costly. The Hydrosparge VOC sensor was developed for the Tri-Services Site characterization and Analysis Penetrometer System (SCAPS) program to provide in situ VOC detection in ground waters. The system consists of a direct push well for groundwater access, an in situ sparge module, and a direct-sampling ion trop mass spectrometer. The Hydrosparge VOC sensor was tested at three geographically different sites across the country. The results obtained with the SCARS in situ technique indicate a strong linear relationship with EPA methods with regression coefficients ranging between 0.63 and 0.88 and the slope of the regression line between 1.1 and 1.2. The SCAPS Hydrosparge VOC sensor has been demonstrated to reduce the time and cost required to characterize sites by directing the placement of a reduced number of conventional monitoring wells.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Site characterization for subsurface contaminants is time consuming and costly. The Hydrosparge VOC sensor was developed for the Tri-Services Site characterization and Analysis Penetrometer System (SCAPS) program to provide in situ VOC detection in ground waters. The system consists of a direct push well for groundwater access, an in situ sparge module, and a direct-sampling ion trop mass spectrometer. The Hydrosparge VOC sensor was tested at three geographically different sites across the country. The results obtained with the SCARS in situ technique indicate a strong linear relationship with EPA methods with regression coefficients ranging between 0.63 and 0.88 and the slope of the regression line between 1.1 and 1.2. The SCAPS Hydrosparge VOC sensor has been demonstrated to reduce the time and cost required to characterize sites by directing the placement of a reduced number of conventional monitoring wells.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Volatile organic compounds (VOCs) are among the most frequently identified contaminants in soil and groundwater samples obtained during investigation of hazardous waste sites. The thermal desorption sampler (TDS), was developed for the Site Characterization and Analysis Penetrometer System (SCAPS) program to provide in situ analysis of VOCs in vadose zone and saturated soils. In operation, the TDS captures an estimated quantity of soil below ground, thermally desorbs the VOCs, and transfers them to the surface where they are analyzed on a field poflable ion trap mass spectrometer (ITMS). This analysis is sensitive to the low ppb range for chlorinated solvents and BETX compounds. The TDS was field tested at five geologically distinct sites across the country. Field data were compared to laboratory data (EPA SW-846 Method 8260B (USEPA 1995)) for validation of the technique. Data analysis indicated that the in situ analysis of the primary VOC contaminant at each site demonstrated good correlation with the validation method with a liner regression correlation coefficient between 0.8 and 1.0 and the slope of the regression line between 0.7 and 1.3. Secondary VOC contaminants of lesser concentration demonstrated poorer correlation that could be attributed to the lack of chromatographic separation prior to the ITMS analysis.
Author: Publisher: ISBN: Category : Languages : en Pages : 186
Book Description
In 1994, the Strategic Environmental Research and Development Program (SERDP) funded a Tri-Service effort to accelerate the development and fielding of environmental sensing technologies to extend the capabilities of the Site Characterization and Analysis Penetrometer System (SCAPS). This effort, which was completed in 1998, produced a wide range of SCAPS sensors, samplers, and supporting technologies that allow SCAPS to detect, delineate, and map subsurface contaminants including petroleum, oils, and lubricants (POL), toxic metals, explosives and energetic, volatile organic compounds (VOC), and radioactive wastes. This report describes the various SCAPS sensors developed as part of the SERDP-funded effort including laser induced fluorescence, Raman spectroscopy, laser induced breakdown spectroscopy, X-ray fluorescence, electrochemical sensor, biosensor, and spectral gamma probes. In addition, the development and testing of cone-penetrometer based samplers, including thermal desorption and multiport samplers, are detailed. Results of laboratory evaluation and field validation studies are presented, and technology transfer accomplishments are described. Included in this report is a bibliography of technical papers, reports, presentations, and patents produced during the course of this project.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
The thermal desorption sampler (TDS), developed for the Site Characterization and Analysis Penetrometer System (SCAPS) program provides in situ analysis of volatile organic compounds (VOCs) in vadose zone and saturated soils. In operation, the TDS captures an estimated quantity of soil below ground, thermally desorbs the VOCs, and transfers them to the surface where they are analyzed on a field portable ion trap mass spectrometer (ITMS). This analysis is sensitive to the low ppb range for chlorinated solvents and BETX compounds. The TDS was field tested at five geologically distinct sites across the country. Field data were compared to laboratory data (US EPA SW-846 Method 8260B) for validation of the technique. Data analysis indicated that the in situ analysis of the primary VOC contaminant at each site demonstrated good correlation with the validation method with a liner regression correlation coefficient between 0.8 and 1.0 and the slope of the regression line between 0.7 and 1.3. Secondary VOC contaminants of lesser concentration, demonstrated poorer correlation that could be attributed to the lack of chromatographic separation prior to the ITMS analysis. Cost of operating the TDS system was compared to conventional sample collection and analysis techniques. The main savings produced by using this system were a reduction in time spent characterizing a site, the reduced exposure of workers to contaminants, and the minimization of investigation wastes.
Author: Publisher: ISBN: Category : Languages : en Pages : 303
Book Description
The Second Annual Site Characterization and Analysis Penetrometer System (SCAPS) Sensor Development Workshop was held at the U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS, during August 29 and, 30, 1996. In attendance were researchers, managers, and SCAPS users representing the Army, Navy, Air Force, the Department of Defense, the Department of Energy, the Environmental Protection Agency, and the National Institute of Standards and Technology. Workshop participants presented briefings on the status of their SCAPS-related sensor research, development, and demonstration efforts. Managers and users of SCAPS technologies participated in the briefings and discussions and described the needs and concerns from the users perspective. The Peer Review Panel evaluated the progress of the Tri-Service SCAPS sensor development project and presented recommendations for future work.
Author: Publisher: ISBN: Category : Languages : en Pages : 21
Book Description
This letter provides information on the capabilities and potential uses of the Tri-Service Site Characterization and Analysis Penetrometer System (SCAPS) direct-push technology for the investigation of hazardous, toxic, and radioactive waste (HTRW) sites.
Author: Publisher: ISBN: Category : Languages : en Pages : 54
Book Description
In the United States there are numerous locations where site investigations are being conducted to assess the geological, hydrogeological, and possible subsurface contamination conditions. During the course of those site investigations, numerous boreholes and penetrometer holes are being placed in the ground subsurface. Many of these drilled or pushed holes penetrate the groundwater saturated zone and provide potential conduits for the transfer of contaminants into the local groundwater. The open boreholes or penetrometer holes must be properly sealed prior to the completion of the site investigation to prevent any potential cross layer contaminant transfer through the subsurface.
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Author: William M. Davis
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Author: Grace Bujewski
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