100-OL-1 Operable Unit Field Portable X-Ray Fluorescence (XRF) Analyzer Pilot Study Plans (original) (raw)
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Field portable x-ray fluorescence (XRF) continues to gain acceptance as a complement to traditional laboratory testing of metal contaminated soil. The quality of data produced by field XRF varies with site conditions, soil composition, and sample preparation. Quality assurance protocols for the field method usually require that a number of field samples be split and sent to a laboratory for confirmatory analysis. This confirmatory analysis can provide valuable information of the effectiveness of the field methodology.
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Characterize the nature and extent of lead in soil at numerous munitions sites undergoing assessment and/or cleanup throughout the U.S. The objectives of the soil characterization efforts were: (1) to collect data of sufficient quantity and quality to establish the lateral and vertical extent of lead in soil associated with small arms use and (2) to support remedial action planning or no further action (NFA) determinations. To streamline the data collection and allow for near real-time interpretation of results, Gilbane performed in-field analyses of the soil samples using a field-portable X-ray fluorescence (XRF) analyzer, supplemented by analyses of a subset of samples by a certified analytical laboratory. By implementing strict sample collection, processing and analytical protocols, Gilbane was able to consistently achieve excellent correlation between the field XRF measurements and certified analytical l...
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The Animas River provides irrigation water in northwestern New Mexico and the Navajo Nation. Concerns regarding the river water quality arose on August 5, 2015, when approximately 11.35 million liters of heavy metal contaminated water was accidentally released from the Gold King Mine into the Animas River. This study sought to determine the total concentrations of 7 heavy metal(loid)s (As, Pb, and Zn as metals of concern and Fe, Mn, Ca, and Cu as metals of interest) using portable X-ray fluorescence (PXRF) in two agricultural fields and compare these values to Environmental Protection Agency (EPA) regional screening levels (RSL). Total concentrations of 6 out of 7 metals were below the RSL; only As exceeded the soil screening value of 7.07 mg kg −1 at some locations in the agricultural fields. We also determined water-soluble (WS) and exchangeable fractions (Ex) of As that might be available for agricultural crop uptake using sequential extractions. The WS-As ranged from 0.014 to 0....
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Contaminated soils present a major global health problem especially in urban areas with dense population. The common contaminants of soil are heavy metals. Research investigating the risk assessment procedures adopted in different EU member states, suggests that there needs to be greater standardization in the methods of assessing risks from contaminated soils. For risk-assessment studies and follow-up remediation projects is necessary to perform numerous analyses to determine the concentration of metal contaminants. To minimize the need for laboratory analysis of soil samples, the XRF - technology can be used for screening the metal contamination in soil, with significant advantages. This method provided significant accuracy and well documented to support field decision making with reduced overall costs. The new generation of portable XRF instruments is equipped with miniatures X-ray tubes in order to reduce the regulatory demands encountered with radioactive isotopes.The goal of t...
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Urban expansion into traditional agricultural lands has augmented the potential for heavy metal contamination of soils. This study examined the utility of field portable X-ray fluorescence (PXRF) spectrometry for evaluating the environmental quality of sugarcane fields near two industrial complexes in Louisiana, USA. Results indicated that PXRF provided quality results of heavy metal levels comparable to traditional laboratory analysis. When coupled with global positioning system technology, the use of PXRF allows for on-site interpolation of heavy metal levels in a matter of minutes. Field portable XRF was shown to be an effective tool for rapid assessment of heavy metals in soils of peri-urban agricultural areas.
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The redevelopment of a 3 Ha Orchard into a 33 lot subdivision in Hastings, Hawkes Bay, posed a number of challenges due to extensive contamination from historic pesticide use in particular lead arsenate. Previous remedial works in the area had shown very limited relation between hot spots and objects visible on old aerial photographs with the exception of spray sheds. Over a century of orcharding, preceded by sheep farming had seen many changes in property use, tree settings, position of auxiliary buildings and boundary adjustments. A cooperative client, who’s life motto ‘do it once, do it right’ had this reinforced by observing second and third rounds of remediation by soil mixing on surrounding properties. He thus agreed to a thorough site investigation, but on a sharp budget. The resulting quality site data have proved invaluable throughout the project and the remediation was carried out according to plan, on budget and with a minimum of surprises. The use of a field portable XRF...