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Process for hydrocarbon decontamination of soils n No Chemicals n No Bacteria n Homogeneous residuals n Rapid intervention n Immediate results

Overview of Benefits Overview of Benefits n Removal of hydrocarbons from fines –DNAPL Recovery –Light Hydrocarbon in Aqueous phase Recovery –Chlorinated Hydrocarbon Recovery n Energy requirements are minimal

Overview of Benefits Overview of Benefits n Environmental Benefits: –Reduced volume of residual tailings compared to soil washing –Increased water recycling –Reduced emissions compared to thermal treatment –Reduced methanogenesis n Extraction efficiency surpasses all present technology

Classified soil Oily soil Water Screening Hydrocarbon coated beads Solvent Diluted hydrocarbon Solvent Evaporator beads Solvent recovery Hydrocarbon Mixer Hydrocarbon Soil Remediation Process Gravel/rocks Water wash Washed Gravel/rocks Settling Vessel beads

RHS Technology n The Bead Properties –Oleophillic –Hydrophobic –Organically stable –Not affected by temperature or climate

RHS Technology n The Bead Properties –Re-useable –500 cycle life with no disposal costs –Solid, resistant granular shape –Easy to recuperate with existing, off-the- shelf system

Simulated RHST Process Flow Stream Pipe Wall Beads Oil/soilSlurry The RHS Beads are introduced into the soil slurry stream to initiate the migration of the hydrocarbons from the soil particles upon contact with the preferential surface of the RHS beads

The interfacial surface tension between Hydrocarbons and the RHS Bead results in the adsorption of the Hydrocarbons onto the preferential surface of the RHS bead upon contact. Nanotechnology

Current Focus n RHS technology introduced to Canadian oil sands operators in 1999 n Industry needs oriented towards cleaning up tailings from oil extraction process n Over 500 Million m3 of fines in reservoirs n Production of over 200,000 m3 per day

RHS Technology Tests Completed n Bead Chemistry –University of Montreal –Alberta Research Council n Mature Fine Tailings –University of Alberta n End of Pipe Tailings –SNC Lavalin\Canmet

RHS Technology Tests Completed n Absorbent properties –University of Alberta –University of Montreal –Canmet –Environment Canada –SNC Lavalin\Canmet

RHS Technology Batch Test Results n Recovery up to 90% of bitumen from tailings where PSD < 100 microns n Optimum temp range 35C° to 45 C° n Residual Bitumen less than 1100 ppm in residual tailings, for viscosity > 100,000 cps

RHS Technology Batch Test Results n Recovers both naphtha and bitumen –Up to 91% Bitumen extraction –Up to 85% naphtha extraction n Final design parameters for continuous loop

Stakeholder Objectives Met n High throughput yields with immediate results n Reduced operating time frame for project n Lower operating cost n Engineered soil for reclamation n Initial step in removing hydrocarbons allows for metal leaching in the slurry

Stakeholder Objectives Met n Use of chemical additives is eliminated n Homogenous product for quality control n Reduced volatile emissions n Short execution time reduces liability exposure

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