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REMEDIATION OF A FORMER CHEMICAL BLENDING FACILITY UTILIZING MULTIPLE METHODS INCLUDING IN SITU CHEMICAL OXIDATION AND SOIL TREATMENT
Knafla, A. and L. Vickerman.
RemTech 2018, 10-12 October, Banff, Alberta, Canada. 25 slides, 2018

Five techniques were used to optimize remediation efficiencies at a site affected to a depth of 9 m by petroleum hydrocarbons and solvents (ketones, alcohols, aldehydes, chlorine substituted): Tier 2 guideline development; a field mobile screening lab (GC-PID); ex situ and in situ chemical oxidation; and a mixed soil/bentonite cutoff wall. The field screening lab supported in-field waste classification and segregation. Ex situ chemical oxidation treatment of the appropriate waste classes resulted in notable landfill cost savings. A similar approach was used to treat a portion of soils to below Tier 2 guidelines, allowing the material to be used for backfilling instead of landfilling. In situ chemical oxidation achieved remediation of clay loam soils and a sand/gravel seam beneath the facility within a 6-month injection timeframe thanks to intensive injection grid spacing. Post-injection drilling confirmed Tier 2 guidelines had been met and no subsequent remediation was required.
Slides: https://www.esaa.org/wp-content/uploads/2018/10/18-Knafla.pdf
Longer abstract: https://www.esaa.org/wp-content/uploads/2016/05/Abstracts-RT2018-56.pdf



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