On October 20, 2022, join Sam Rosolina, VP of Applied Innovation, for his presentation titled “A New Tool for the Assessment of Natural Source Zone Depletion.”
– This case study shows how NGS revealed diverse microbial communities and the presence of microbial groups commonly implicated in MIC, including SRB, methanogens and acetogens.
NGS and QuantArray®-Chlor: Characterizing Microbial Communities and Assessing Biodegradation Potential
• A pilot study was conducted at a site where electron donor was injected into groundwater impacted by a mixture of chlorinated solvents.
• QuantArray®-Chlor and NGS provided complimentary evidence of both biotic and abiotic reductive dechlorination in response to the injection of the electron donor giving the client confidence in this remediation strategy expanding electron donor injection to the entire site.
• The ISM study conducted at this site provided clear, actionable evidence that increasing the dissolved oxygen concentration at the site would stimulate hydrocarbon biodegradation. Further, this evidence was provided in a significantly more cost effective manner than a bench-scale treatability study or a pilot scale study and in a more timely manner.
At a crude oil impacted site, project managers were considering MNA as a site management strategy based on favorable contaminant concentration trends and geochemistry in groundwater. However, additional lines of evidence were required.
Together with contaminant concentration trends and geochemistry, the direct microbial data provided multiple lines of evidence to support a confidant MNA decision resulting in significant cost savings over enhanced remediation.
• QuantArray®-Chlor analysis allowed site managers to have a comprehensive understanding of all relevant microbial processes at the site over time which allowed timely decisions and significant cost savings in site management.