DR. SPANG INGENIEURGESELLSCHAFT FÜR BAUWESEN, GEOLOGIE UND UMWELTTECHNIK MBH

Solingen electronic signal box,
1st construction phase

Developer

DB AG, Western Region via DB ProjektBau GmbH, Cologne

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PDF, 161 KByte

Project

• The area under examination is located on track section 2730, km 0.020 to 26.600 between the stations of Gruiten and Cologne- Mülheim
• Dismantling of old and construction of new rail facilities
• New cable run
• Technical modifications

Our services

• Subsoil analysis during construction
• Expert monitoring
• Environmental coordination
• Foundation works consultancy
• Sampling
• Declaration analyses
• Classification of building fabric for recycling
• Preparation of recycling and disposal concepts

Düsselpark, Gerresheim South, Düsseldorf

Developer

City of Düsseldorf, environment agency

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PDF, 142 KByte

Project

• Development plan 5976/025 for the former grounds of the Gerresheim glassworks
• Area approx. 12 ha
• Investigation programme for approx. 270 core soundings and dynamic probings in a grid of 30 m
• Urban redevelopment concept with residential and commercial properties and a park through the exposure and configuration of the Düssel river running through it

Our services

• Subsoil investigation and technical evaluation of the native backfills and grown soil
• Foundation works consultancy for urban sewerage and drainage infrastructure
• Roadbuilding measures and use as envisaged in the development plan
• Dismantling and disposal concept for the existing industrial structures

ESV sports ground, Östingstraße, Hamm

Developer

Federal Office for Railway Assets, West Region, Essen office

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PDF, 161 KByte

Project

• Preparation for the sale of a property of size approx. 20,000 m²
• The property, which is used by ESV Hamm, is being sold by the Federal Office for Railway Assets
• Determination of the consequential soil costs in respect of contamination and soil/waste

Our services

• Detailed investigation of inherited liability, modules I (contaminated sites) and II (waste/soil)
• Elaboration of analysis concepts for the individual FRIDU modules
• Inspection planning
• Subsoil investigation
• Chemical analyses
• “Risk assessment” expert report, detailed investigation level

Limitation of contamination following a freight train accident

Developer

DB Netz AG, Southwest Region, Stuttgart

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PDF, 152 KByte

Project

• Freight train accident in Stuttgart-Untertürkheim (Deckerstr. / Augsburger Str.) on 15.03.2010
• Soil contaminated by damaged tank wagon (diesel)
• Approx. 300 - 400 l of diesel fuel escaped
• The accident was located in the heart of the mineral spa protection zone at the edge of the Neckar floodplain

Our services

• Risk assessment
• Investigation to limit the extent of the damage
• Subsoil analysis, 7 core soundings

Expanding the central sewage plant, Freiberg

Developer

City of Freiberg, waste water disposal services

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PDF, 281 KByte

Project

• Subproject to clear a site in order to create a rainwater retaining basin in the Münzbach valley
• Demolition of 7 buildings, one chimney and other paved external installations (e.g. loading ramps, roads) over a total area of approx. 1.4 ha

Our services

• Research of historical documents regarding previous construction
• Investigations of existing building fabric / materials for pollutants
• Preparation of a demolition and disposal concept with determination of the quantities of building materials requiring separation
• Determination of the disposal routes for building fabric requiring particular monitoring (e.g. asbestos, PCBs, tar cork, etc.)
• Elaboration of the necessary documents for approvals and consents
• Cost estimate and calculation of construction times
• Preparation for award of contract
• Assistance in award of contract
• Construction supervision

Building project in the Grusonsstrasse, Frankfurt am Main, 2. BA

Developer

Groß & Partner Grundstücksentwicklungsgesellschaft mbH, Frankfurt am Main

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PDF, 89 KByte

Project

• Demolition of a former station building and ancillary building between the railway cutting on the Frankfurt-East – Hanau section and the Danziger Platz
• New construction of a 6-storey business premises
• Area 105 x 45 m
• Basement construction on new building depending on subsoil condition, 1 o2 2 basement levels

Our services

• Investigation concept
• Investigation of subsoil
• Report on environmental engineering
• Demolition and disposal concept
• Recommendations for foundations and for controlling groundwater
• Environmental engineering examination and assessment of the soil and the fabric of the building for existing pollutants
• Assessment of subsoil and advice on foundations

Lütgendortmunder Hellweg site, Bochum

Developer

Müller Lila Logistik, Herne

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PDF, 122 KByte

Project

• Sale of a site of approx. 2 ha in Bochum
• Before the planned sale, there was suspicion of possible soil contamination and the consequences of the existing contaminations were investigated

Our services

• Evaluation of risks using reports on previous pollution to assess the level of pollutant contamination on the site, previously used partly for industrial purposes
• To investigate the suspect areas, 20 small pile-driven boreholes were sunk
• Investigation of the mixed soil samples under the Federal ordinance on protection of the soil and under LAGA guidance

Change of use for Kleff sewage treatment works, Witten

Developer

Ruhrverband, Essen

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PDF, 260 KByte

Project

• Change of use from sludge drying sites and basins to residential use
• Area recycling of a sewage treatment sludge drying facility, taking account of LAGA and BBodSchV, with renovation and change of use for 6 former sludge drying basins

Our services

• Historical investigations, initial assessment
• Inspection of plans and elevations for mines
• Risk assessment, investigation of renovation works
• Site assessment with a view to planned change of use
• Planning for renovation, encapsulating using Trisoplast sealant liner
• Drawing up and monitoring an investigation programme
• Support during renovation
• Third-party monitoring of landfill construction
• Identifying soil contaminations
• Determining the risk potential to groundwater, soil air, soil
• Renovation concepts
• Planning for readying site for construction, and renovation

Institut für Zuverlässigkeit und Mikrointegration (IZM), Technopark Chemnitz

Developer

Fraunhofer Society, Munich

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PDF, 150 KByte

Project

• Building a research institute for nanotechnology with increased expenditure for foundations (dampening vibrations)
• 35 x 35 m area, 4 storeys, cellar level with connecting access to neighbouring building

Our services

• Subsoil report with settlement calculations
• Proof of slope failure
• Dimensioning of water raising during the construction period
• Authorisation under water laws
• Demolition and disposal concept for the old buildings
• Energy use of a deep well concept

Investigation of renovation works
to the former Bebbelsdorf quarry, Witten

Developer

Ennepe - Ruhr - Kreis, Schwelm

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PDF, 143 KByte

Project

• Covering 5 sandstone faults in a ridge of hills, filled during the period 1962 to 1971 with building rubble and domestic waste, and individual faults in the rock also being filled with industrial waste from hard coal working, producing a total of approx. 100.000 m³ of infill
• Pollutants: significant contamination with polycyclic aromatic hydrocarbons (PAH), phenols, PCBs and heavy metals, in part with significant methane gas formation
• Discharges of pollutants via percolation water and groundwater have been demonstrated

Our services

• Investigation of prior pollution with stages for Historical Investigation, Technical Investigation (Risk Assessment)
• Comprehensive supplementary risk assessment for renovation
• Subsoil investigation using 2,000 m core drillings and test drillings pursuant to DIN 4021
• Taking samples
• Chemical soil, groundwater and soil air analysis
• Devising renovation proposals

Renovation of the waste
heap complex 271 in Aue

Developer

Saxony Land Office for the Environment and Geology

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PDF, 92 KByte

Project

• Final design of the waste heap including associated roads, paths, waterways and landscaping construction
• Volume totalling 13.7 million m³ and a footprint of approx. 67 ha

Our services

• Third-party monitoring of quality-appropriate execution of renovation of the heap and bringing into reuse
• Monitoring execution of the object for compliance with the permission on radiation protection and respecting state of the art for construction of paths, waterways and landscaping
• Checks on re-storage and profiling works, determining the degree of grouting, the degree of grouting including permeability coefficients and particle distribution, proof of suitability of the covering layers, applying the covering layers to the embankments and parts of the plateau and extending percolation water catchments

Area recycling of a
sewage treatment plant sludge
drying facility – renovation and
reuse of 6 basinsAuthors

Autoren

Dipl.-Ing. Axel Sommerfeld, Essen Dipl.-Ing. Christian Spang und Dipl.-Geol. Gerhard von Zezschwitz, Witten

Expert article
PDF, 2480 KByte

Fachartikel

• The Ruhrverband, Essen, used a site of approx. 60.000 m² on the Kleff road in Witten as a sludge drying site for the Witten sewage treatment works, situated alongside the Ruhr. The 6 basins were investigated for planned reuse for residential housing between 2001 and 2005, with the result that in one infilled basin (Basin 6) very high levels of organic pollutants (EOX, BTEX, PAH) were found, together with back-fill at the bottom of the emptied Basins 1 to 5, in some places with significantly increased levels of PAH and heavy metals. Due to the total volume of over 44,000 m³ of chemically contaminated back-fill materials, the site is to be made ready for building by local restorage and securing or through removal of materials with lower pollution levels. Renovation of the site includes securing (encapsulating) the more heavily contaminated back-filling materials in Basins 5 and 6. A surface seal was created over the two basins using Trisoplast, over an area of approx. 8,000 m². The sustainability of the renovation is checked using groundwater monitoring.
  
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