Neupane, A., E.W. James, and D. Schneider.
26th International Petroleum Environmental Conference, 7-9 October, San Antonio, TX, 33 slides, 2019

A refined product pipeline release led to the rapid assessment of impacted soil and groundwater using a combination of hydro punch and mobile gas chromatography lab. Once adequately assessed, impacted soil was remediated primarily by mass removal. Residual soil was treated with a combination of in situ chemical oxidation (ISCO) and enhanced bioremediation, leading to reductions below protective concentration levels and regulatory closure for soil issues. However, concentrations of up to 8.55 mg/L of benzene remained in groundwater. Following a bench-scale treatability test, full-scale ISCO application targeting three impacted areas was completed with a network of 31 injection and 13 extraction wells and resulted in significant reductions in total petroleum hydrocarbon-gasoline and benzene in the source area. Attenuation via natural source zone depletion and/or enhanced biostimulation/bioaugmentation is planned at the site to address the dissolved phased concentrations that still exceed regulatory levels. https://cese.utulsa.edu/wp-content/uploads/2019/10/IPEC.final-A.-Neupane-Rapid-Assessment-Remediation-Soil-and-Groundwater.pdf