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ON-SITE TREATMENT OF A DISSOLVED CHROMIUM PLUME: FROM BENCH TRIAL TO REMEDIATION TO RESULTS
Rakewich, B. | SustainTech, 22 March, Saskatoon, Saskatchewan, 32 slides, 2018

A dissolved Cr plume originating from a nearby chrome plating facility was identified at an industrial property in Edmonton, Alberta. Soil impacts were isolated to two small source areas, but groundwater contamination was more widespread (~2,000 m2). Dissolved Cr(VI) concentrations were ≤300 mg/L and total Cr concentrations were ≤308 mg/L at the source areas, with target numerical guidelines of 0.001 mg/L and 0.0089 mg/L. Three 60-cm wells were installed with submersible pumps that used 1,550 kg ferrous sulfate (FeSO4) to treat a total of 334,700 L of groundwater. About 20,900 L injection solution was used to remediate the low-concentration plume. In situ chemical reduction using 15% FeSO4) was tested and used to remediate soil. Testing in 2017 confirmed contamination reduction by ~99% in the source area. Confirmatory soil and groundwater sampling was conducted in 2018 to confirm contamination levels were stable. https://www.seima.sk.ca/resources/Documents/SustainTech%202018%20Presentations/SustainTech%20Barry%20Rakewich%20Presentation%202018.pdf



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