Transformer Oil Remediation

Soil and groundwater contamination caused by 20.000 – 30.000 L of transformer oil leaking into the underground. Dimension: ca. 10.000 m² (Pollutant flag/groundwater), thereof  ca. 4.000 m² and ca. 500 m² / 2000 m³ in the unsaturated soil zone

Multiphase investigation measures using percussion drilling and installation of groundwater monitoring wells as well as determining the current and historical groundwater currents, preparation and implementation of a remediation plan.

Hydraulic In Situ-remediation technology using hydraulic soil washing (unsaturated soil zone, ca. 55 infiltration pipes) with cleaned groundwater, warm water (heated with solar energy)and mixing with H2O2 as well as Pump & Treat using 3 groundwater remediation wells with oil phase removal in 3 wells and 3 stand pipes; Remediation container with soil washing- and groundwater remediation container (3 gravel filters, 2 Activated-carbon filters); leaching of the water into the underground using a drainage shaft.

Oil recovery: ca. 12.000 L Transformer oil
Remediation duration: 1,5 years, planned remediation duration: ca. 5 years

July – Sep. 2002 First Phase of Investigation
Oct. 2002 – March 2003 Second phase of investigation, preparation of Remediation plan
April – July 2004 Third phase of investigation
July – Nov. 2007 Installation of Remediation equipment, Installation of the Remediation container

since Nov. 2007 Operation of the Remediation container

Our services:

Percussion drilling

groundwater monitoring wells

Hydraulic In Situ-Remediation technology
hydraulic soil washing
Pump & Treat
groundwater remediation wells
Soil washing and groundwater cleaning container (Gravel filter, Activated-carbon filter)


    Austria  Europe  

Responsible office:

Our services in the project:

Intergeo Services
Soil and Groundwater Investigation

INTERGEO has accumulated over 30 years of experience in Soil and Groundwater Investigation and has a corresponding high core competency.

Intergeo Services
Soil and Groundwater Investigation and Remediation

Intergeo has performed over 10.000 soil and groundwater investigations in Europe and overseas since being founded in Salzburg in 1983. We provide a single source for all services – from the initial investigation to the detailed remediation action plan.

Intergeo Services
Soil and Groundwater Remediation

INTERGEO implements cutting-edge innovation and technology to simplify remedial actions and reduce costs.