Brochure 1000-20E

Environmental operationsA wide range of solutions

Soil pollution with various hazard level from former industrial sites, landfills or improper waste disposal may cause considerable environmental issues. Keller can implement appropriate techniques to remediate or retain them, in order to avoid further risks in the future for environment and people.

A safe ground for the future.

� Remediation of brownfield sites

� Immobilization or solidification of soil contaminants

� Containment of contaminated zones

� Use of various ground works techniques

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In situ soil remediation Immobilization of contaminants Pollution containment

In situ soil remediation, immobilization and containment techniquesDifferent techniques can be implemented depending on the brownfield properties like the type and amount of contaminant, the ground water conditions, various chemical parameters and the presence of structures on the contaminated ground.

Possible solutions

1 In situ soil remediation:full pollution degradation by introducing remediating agents

� Soilcrete®

� Grouting and chemical grouting

� Deep soil mixing / Mass mixing

� Soilfrac®

2 Immobilization of contaminants:safe solidification of pollution

� Soilcrete®

� Grouting and chemical grouting

� Deep soil mixing / Mass mixing

� Soilfrac®

3 Pollution containment:sealing shell around the contaminated zone

� Cut-off wall with excavator, top vibrator or as diaphragm wall

� Deep soil mixing / Mass mixing

� Use of slurry, cement and /or membrane

Advantages

� Minimal impact on people and existing structures

� Conformity to environmental standards

� Solutions available to treat different contaminant types (heavy metals, hydrocarbons, …)

� Sophisticated site investigation

� Efficient decontamination with minimal excavation of soil waste

� Monitoring with detailed records

� Close cooperation between owner, environmental specialist and ground works specialist

Immobilization of oil pollution with Soilcrete®

Landfill containment with low permeability cut-off wall

If you have further questions, please contact us or visit our website. Here you can order a DVD or a USB stick with all Keller publications.

Reagent

Grout

Water

Cement/Bentonite

Storage tank Mixer

Pump

HaloCrete remediation technique

Keller developed an in situ remediation method using nano iron particles against organic solvents (chlorinated hydrocarbons, CHCs) with the Soilcrete® technology. It aims at destroying especially highly contaminated source zones. Its application could also be extended to other contaminants.

Steps of HaloCrete remediation

1 Before execution

� Classification of contamination

� Site investigation with special regard to contamination source and plume extension

� Laboratory examination of reaction behavior between soil and slurry (reactant)

2 Treatment with Soilcrete®

� Drilling of the rod

� Soil jetting

� Grouting with special slurry mixture

3 After treatment

� Test of executed columns for reactant distribution and content

� Monitoring necessary as always in remediation projects

In-house Research & Development

� Cooperation with:

Column tests in laboratory Soilcrete® operation during large-scale field test

Solving complex foundation and soil problems with customized solutions and methods developed in house is our strength!

We will be pleased to support your team with our solutions!

� Exhaustive laboratory tests with batch and column trials

� Large-scale field tests with extensive contaminant monitoring

� Chemical and mechanical analysis of solid samples, slurries and ground water

A company of Keller Group plc

Reference projects

Keller Group plcGround Engineering Contractors5th floor1 Sheldon SquareLondon W2 6TTUnited Kingdom

www.keller.co.uk

EMEA Division

Keller Holding GmbHKaiserleistrasse 863067 OffenbachGermany

www.kellerholding.com

North America (NA) Division

Keller Foundations LLC7550 Teague Road, Suite 300Hanover, MD 21076USA

www.kellerfoundations.com

APAC Division

Keller AsiaPacific Ltd72 Anson Road #11-03Anson House Singapore 079911

www.kellerasean.comwww.keller.com.au

� Soil remediation

2013 Use of Soilcrete® as part of ex situ remediation process of former gaswork site, Sydney, Australia

2011 Soil mixing remediation, Honeywell site, Baltimore, USA

1995 Soil washing in excavation, Munich, Germany

1993 Use of Soilcrete® as part of ex situ remediation process, Hamburg, Germany

� Pollution immobilization

2013 Immobilization with deep soil mixing of former gas factory, Albury, Australia

2010 Grouting of low-level radioactive waste, Idaho region, USA

2009 Immobilization of landfill with Soilfrac®, Freistadt, Germany

2003 Immobilization with Soilcrete®, gas station, Walserberg, Austria

2001 Immobilization with Soilcrete®, fuel oil reselling site, Bruck, Austria

1999 Immobilization with grouting, gas station, Landeck, Austria

1999 Immobilization with grouting, machinery workshop, Schlitters, Austria

1999 Immobilization of heavy metals with mini-Soilcrete®, Munich, Germany

1995 Immobilization with Soilcrete®, housing project, Rastatt, Germany

1988 Immobilization with silicate gel grouting, gas tank, Düren, Germany

1984 Immobilization with chemical grouting, Six Lakes, USA

� Containment of brownfield sites

2010 Sealing wall with Soilcrete® for heavy metal contamination, Senden, Germany

2009 Sealing wall with Soilcrete® at paint factory, Schweinfurt, Germany

2008 Soilcrete® bottom seal and cut-off wall, Salem, USA

2008 Soilcrete® bottom seal and cut-off wall for gas generator site, Düren, Germany

2013 Cut-off wall around landfill, Caloundra, Australia

2006 Cut-off barrier at Woodlawn bioreactor, Goulburn, Australia

2003 Sealing wall with Soilcrete®, Siebenhirten, Austria

1995 Slurry wall, Queen City Farm, Maple, USA

1995 Diaphragm wall for former gas factory, Tuttlingen, Germany

1993 Sealing wall with Soilcrete® for landfill, Grasslboden, Austria

1992 Sealing wall with Soilcrete® and diaphragm wall, Rüsselsheim, Germany

1992 Sealing wall with Soilcrete® for landfill, Hamburg, Germany

1991 Sealing wall with Soilcrete®, Flensburg, Germany

1990 Sealing wall with Soilcrete® for refinery, Hamburg, Germany

1985 Cut-off wall with depth vibrator for landfill, Siggerwiesen, Germany

1981 Cut-off wall with vibrator for landfill, Möhrfelden-Walldorf, Germany

� Other environmental operations

2006 Permeable reactive Soilcrete® barrier, Memphis, USA

1998 Landfill compaction, Lavamünd, Austria

1995 Landfill compaction, Kornhapen, Germany

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