Preparation of the in situ remediation in the small source area in the tank farm.

05 March 2015

Since a safe situation was observed and confirmed during the injections in the Midway, the preparation of the third phase of the in situ remediation has started.  The third phase is the perozone injections in the small source area inside the operational tank farm. 

Two soil vapour monitoring wells are installed at the border of the two storage tanks next to the perozone injection point.  Ozone and VOC concentrations will be measured in these vapour monitoring wells during the remediation. As a first step, soil vapour extraction was started via vertical wells in the tank farm and the extracted air was monitored for 4 days.  Due to relatively high groundwater level,the extracted air rate (35-40 Nm³/h) is lower than expected (70 m³/h).  The extracted rate is still several times the injected rate in the tank farm (<1 Nm³/h).

As a second step, air (without addition of perozone) will be injected and all process and safety parameters will be monitored during 48 hours. 


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First phase of in-situ remediation completed. Second phase of in-situ remediation on-going, ISCO and SVE operational.