Using OxyZone® on PFAS & Mixed Organic Contaminants
at an Air Force Base
at an Air Force Base
In-situ chemical oxidation (ISCO) using OxyZone® has been used to bring sites with persistent and recalcitrant contaminants to closure when other technologies and methods have failed to meet project goals. In this case study OxyZone® and OxyZone XCT™ are used to destroy poly and perfluoroalyl substances (PFAS) along with petroleum hydrocarbon and chlorinated organic contaminants.
Site: Fire Training Area, Air Force B, Virginia
Contaminant: Mixed solvents, fuels PFAS
Geology: Interbedded silt and sands under tidal influence
Challenge: Destroy PFAS organic contaminants
Remediation: OxyZone® ISCO process
The Air Force Civil Engineer Center (AFCEC) Environmental Directorate Broad Agency Announcement (BAA) seeks to fund better, faster, and more sustainable environmental solutions for the Air Force.
The AFCEC Environmental Restoration BAA currently focuses on solutions for Emerging Contaminants (ECs) and Emerging Issues (EIs) and is executed through the Restoration Technical Support Branch and Environmental Quality Technical Support Branch under FAR 6.102(d)(2).
AFCEC BAA 608 titled Chemical Oxidation and Inclusion Technology for Expedited Soil and Groundwater Remediation was funded from 2011 through 2015 to assess the efficacy of OxyZone® and OxyZone-XCT™ to treat mixed organic contaminants. Target contaminants included conventional volatile organic compounds, such as solvents (e.g., dichlorobenzene, trichloroethane and tetrachloroethylene) and petroleum constituents (e.g., benzene, toluene, ethylbenzene, and xylenes), as well as emerging compounds, such as perfluorinated organic compounds (PFCs) and 1,4-dioxane.
The results indicated that the patented processes of OxyZone® and OxyZone XCT were successful at desorbing, remediating and destroying the majority of the traditional petroleum hydrocarbon and chlorinated organic contaminants. A statistical analysis comparing the PFAS concentrations in wells within the injection test cell to those outside the injection test cell showed a statistically significant decrease in PFAS concentrations within the test cell, but not outside. Additionally, groundwater concentration of the conservative tracer chloride showed no overall dilution impact from the injections, suggesting that there was no or minimal dilution of PFAS. The data also showed that PFAS concentrations did not rebound within the subsequent six month post-inection period. For more details please as for our whitepaper.