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LEVERAGING WARM WATER FROM SOURCE AREA THERMAL REMEDY FOR COMBINED BIOTIC AND ABIOTIC DEGRADATION OF PLUME-AREA CVOCS
Bryant, D. | Groundwater Resources Association Remediation Conference: Optimization of Remediation Systems and Long-Term Monitoring, 13-14 November, Santa Ana, CA, 16 slides, 2019
A warm-water plume generated downgradient from a thermal treatment area was leveraged for synergistic biotic and abiotic remedy of a 1,600 ft TCE plume that migrated 2,000 ft downgradient in an urban area. Two permeable reactive treatment zones were constructed via direct push injection of zero-valent iron and fermentable carbon immediately downgradient of the source area. The amendments enhanced biodegradation and provided an abiotic degradation mechanism if groundwater becomes too warm for microbial activity. VOC and stable isotope data confirm nearly 100% degradation in the upgradient barrier and in the deep zone in the downgradient barrier, and 75% degradation in the shallow zone of the downgradient barrier. Source area groundwater temperature still measured 60°C after >1 year of remediation. https://www.grac.org/media/files/files/b6461ed8/bryant.pdf
A warm-water plume generated downgradient from a thermal treatment area was leveraged for synergistic biotic and abiotic remedy of a 1,600 ft TCE plume that migrated 2,000 ft downgradient in an urban area. Two permeable reactive treatment zones were constructed via direct push injection of zero-valent iron and fermentable carbon immediately downgradient of the source area. The amendments enhanced biodegradation and provided an abiotic degradation mechanism if groundwater becomes too warm for microbial activity. VOC and stable isotope data confirm nearly 100% degradation in the upgradient barrier and in the deep zone in the downgradient barrier, and 75% degradation in the shallow zone of the downgradient barrier. Source area groundwater temperature still measured 60°C after >1 year of remediation. https://www.grac.org/media/files/files/b6461ed8/bryant.pdf
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