In-Situ Remediation Practice Leader
Woodard & Curran
Dan is In-Situ Remediation Practice Leader for Woodard & Curran in East Windsor, New Jersey. Dan has worked in the field of in-situ chemical and biological remediation since 1997. He holds three patents related to biological and chemical in-situ treatment technologies of organic and inorganic contaminants in soil and groundwater, and is particularly interested in combinations of technologies for complex sites. Dan earned bachelor's and master's degrees in geology from the University of Florida in Gainesville, Florida in 1988 and 1990, respectively, and a Ph.D. in geology from Columbia University in New York City, New York, in 1995.
Leveraging Warm Water from a Source Area Thermal Remedy for Synergistic Biotic and Abiotic Degradation for a Downgradient CVOC Plume
Warmth from source-area thermal remedies persists and can generate a warm water plume downgradient from the thermal treatment area. This warmth can accelerate microbial activity as well as desorption. We leveraged that warm water for a synergistic biotic and abiotic remedy in the proximal portion of a plume in a dense urban area. The plume is comprised primarily of TCE and its products and migrates 2,000 feet downgradient in an urban area. Two permeable reactive treatment zones were constructed in accessible areas of the plume immediately downgradient of the source area, using a blend of ZVI and fermentable carbon to enhance biodegradation and provide 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.