Soil Blending of Chemical Oxidants to Accelerate Site Closure
Donna Cline, P.E., Senior Environmental/Remediation Engineer, and Ricker Lamphier, EIT, Staff Engineer, Terracon Consultants, Inc.
Co-Authors: Patrick Hicks, Southeast Region Technical Sales Manager, and Brant Smith, Technical Applications Manager, Evonik Active Oxidants, LLC
The remedial objectives were to reduce the petroleum contaminants of concern in onsite groundwater to the Risk Management Option II criteria and to reduce offsite groundwater contaminants of concern below the Groundwater Cleanup Target Levels (GCTLs). The onsite remedial activities commenced in February 2019 and included a source area excavation and soil blending of the downgradient groundwater plume with a chemical oxidant. The downgradient petroleum hydrocarbon impacted area was treated via in-situ soil blending of chemical oxidizers (8,816 pounds (lbs) of PeroxyChem’s Klozur SP® and 20,300 lbs of Portland cement (high pH activator). The chemical oxidant was applied in 4 horizontal trenches, across the 2,500 square foot treatment area, within the soil intervals six to 14 feet bgs. Soil blending with the chemical oxidant was used to minimize costs associated with soil excavation and off-site disposal. The chemical oxidant placed within the downgradient plume was also used as a type of barrier to further meet the remedial objective of achieve off-site groundwater concentrations below the respective GCTLs.
Donna Cline, P.E., Senior Remediation Engineer, B.A. in Physics, M.S. in Mechanical Engineering, 2018 - 2021 STEM and Scholarship Chair, 2021 Treasurer of Society of American Military Engineers Tampa Bay Post.
Ricker Lamphier, EIT, Staff Engineer, U of F graduate in Environmental Engineering in 2020, Member of Florida Blue Key, 2020 Student Competition Winner of Florida Environment Water Association.