GeoTechnical Surveys

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CPE-Elorane

Elorane has provided an elite capacity for advanced geophysical surveys worldwide since 1986. Now Elorane and CPE have come together to expand on these services and further develop the technology pioneered by Dr Jim Cull. Go to Capabilities->geophysics for more about Jim.

Elorne conducts surveys, with particular emphasis on high resolution geophysical methods, for a wide range of industries, including:

  • Water / Sewerage
  • Environmental
  • Oil & Gas
  • Mining
  • Electricity
Techniques

CPE-Elorane has a wide suite of instrumentation and techniques, which it fine-tunes to suit specific applications.

We are renowned for innovation in transforming research into advanced instrumentation and techniques. Our staff are actively involved in developing new technology through an extensive R&D program which has been conducted in collaboration with Monash University, and now continued with Deakin University.

A complete list of the techniques we use are outlined in the Capabilities->geophysics section

Asset Management

Ageing infrastructure is now a major concern for many organisations. We assist by offering a risk-based, predictive, approach to asset monitoring and rehabilitation, that benefits asset managers with their overall asset condition assessment programs.

We provide a complete Asset Assessment program covering Pipelines, Bridges and Structures (e.g. coal dredgers)

We have used PARMS for asset management.

Data Management, Analysis & Reporting

Data collection, analysis and presentation in reports that are relevant, useful and easy to interpret, is a significant part of what we do.

It is easy to get go into data overload – our responsibility is to transform the data and present it in reports and presentations that work for you.

We provide remote data acquisition equipment and continuous monitoring software that makes the information availabe anywhere there is a connection to the Internet. This provides relevant data, in a user-friendly format, for technicians and managers in the field and in the office.
 

Pipeline Detection & Corrosion Mapping

CPE-Elorane has been successfully established itself as a leader in asset assessment within water boards across Australia. We conduct surveys for these organisations to identify vulnerable assets, with particular focus on pipes.

We survey all types of pipe.

Class 1: cast iron (early nasty one), actual carbon content of original cast progressively modifies to graphite, doesn’t necessarily mean that pipe fails but it becomes fragile;put together in various ways (e.g. in halves with seams) very hard to examine with HDU because surfaces are oxidized etc. Usually specifications were poor, installation was variable
Class 2: Ductile Iron (DI); malleable when heated (can be spun, etc); better than cast iron because metal density and manufacturing tolerances were better; repeatable
(DICL) Ductile iron, concrete lined: protects internal surface against abrasion and corrosion; has been the standard with additional protection such as plastic wrap sleeves, sometimes painted
Class 3: Mild Steel (MS); big step up of quality of manufacture and higher strength; (MSCL) mild steel concrete lined: higher strength for pressure pipes; generally thinner walled; often welded on site, often bitumen coated; came in, in last 15 years
Asbestos: Asbestos cement pipes still exist
 
 
 
 
 
 
 
 
 
 

 

Techniques
Dr Jim Cull of Elorane has developed new instruments and techniques for surveying pipes, which he combines with off-the shelf equipment to investigate corrosion:

  • LPR (Linear Polarised Resistivity): soil corrosivity; spot analysis; where spot sampling is appropriate or possible. Added to this is a technique called PEDL (Polarised Electrolytic Double Layering) which measures soil properties, corrosivity and stray currents.
  • TEM (Transient Broadband Electromagnetics): Pipewall measurements; can be used for measuring any metallic thickness – don’t need to remove coating; doesn’t need direct contact; very fast; reads beyond tiles, concrete etc. limit to the thickness of a coating, though; can be used in steel girder etc
  • HDU (High Definition Ultrasonics): used mostly in corrosion work but can used for defect analysis such as integrity of storage tanks; limitations – surface preparation required – all surface coatings need to be removed to get down to bare metal – intimate contact with surface; off-the-shelf product – the standard NDT tool
  • Ultrasonics

 

South East Water
Survey for Rosebud
Surface resistivity – Ohmapper survey with Ravin
 
 
 

Environmental Site Investigations & Remediation

CPE_Elorane has strong expertise in electrical methods sensitive to variations in ground conductivity. This, combined with TEM and galvanic methods, provide an ability to detect and track variations in groundwater quality and the dispersal of contaminants.

Applications include:

  • Landfills
  • Mining
  • Groundwater migration and contamination
  • Polution plumes

 

Brisbane City Council was concerned about tree die back occurring in parklands located in close proximity to a landfill site. Plans were underway to redevelop the site however it was suspected that underground seepage was migrating to nearby parklands and gradually killing off trees.

CPE’s Elorane team was asked to conduct an environmental survey prior to redevelopment to inform a planned site remediation. A resistivity survey was conducted to identify underground channels (seepage paths) that may have been affecting the trees and additional surrounding areas earmarked for redevelopment. Results from the survey indicated………………

The town of Portland in southwest Victoria was planning to develop a housing estate that was adjacent to an active rubbish dump. The town required reassurance that the subsurface of the proposed housing estate was not affected due to possible seepage from the rubbish dump.

CPE-Elorane conducted a TEM (Transit Electromagnetc) survey to interrogate the subsurface of the proposed site to identify……….. With this information our client was able to……..

Yallourn Power Station, located in Victoria’s Latrobe Valley, supplies 22 per cent of Victoria’s electricity needs and approximately 8% of the National Electricity Market. Typical of coal mining operations is the recurrence of mine spoils – the outflow of acidic water from (usually abandoned) metal or coal mines.  Acidic water that drains from coal stocks, coal handling, coal washeries and coal waste tips contain an abundance of sulfide minerals that are highly acidic, therefore posing a substantial threat to the environment.

TEM (transit electromagnetic) was used  to investigate the acid water run-off from Yallourn’s mine spoils. This enabled the mine to identify possible contamination sites, enabling localised site remediation.

In Sandringham the former site of a paint company was being remediated for use as a housing estate. Elorane conducted a survey and mapped the chemical leaching in teh soil.

Mining / Mineral Exploration

We conduct mineral exploration surveys for mining companies.

Applications:

  • Site management (infrastructure integrity analysis)
  • Coal moisture content detection
  • Fracture mapping

 

Minerals we search for:

  • Iron Ore
  • Gas
  • Coal
  • Gold
  • Bauxite
  • Titanium
Primary methods we use:

  • Gravity
  • Magnetics
  • Seismic refraction / reflection
  • Magnetics
  • Resistivity
  • Spontaneous potential
  • Induced polarization
  • Electromagnetics (EM)
  • EM-VLF
  • Magneto-telluric
  •  
     
     

 

Dubbo (NSW)
Surveys were conducted by PhD students from Monash University using magnetic and TEM techniques in the search for gold.
Dookie (Vic)
This project was an ideal test bed for development of TEM
Central Vic & NSW
Extensive temperature surveys were conducted for prepsective geothermal sites.
 
 

 

Infrastructure Analysis

Surveys are conducted on:

  • Cavities
  • Footings
  • Foundation

 

Domain Tunnel
GPR survey looking for anchor volts
West Melbourne
At a Container storage facility in West Melbourne extensive surveys were conducted for Pavement integrity
Geelong Railway Tunnel
GPR surveys were conducted to find fractures and faults within the substrate of the tunnel, leading to a comnprehensive Risk Analysis report of the structure.
 

 

Subsurface Mapping

Precision Mapping is often required by the Defence, Engineering, Environmental, Energy and Water industries.

After careful consideration of the target properties and the potential ground response, CPE-Elorane selects the most appropriate technology in consultation with each client.

Subsurface Mapping

  • soil profiles
  • pipelines
  • cables
  • Unerground Storage Tanks
Underground Services Location

  • Underground storage tanks (UST)
  • Underground pipelines – water, sewerage & Gas
  • Electricity cables
  • Telecommunications cables
Archaeo/Forensic Investigations

  • guns
  • corpses
  • Archaeological finds

 
 

 

Techniques
Commonly, techniques used are a combination of:

  • High definition magnetics
  • Ground penetrating radar (GPR)
  • Ground conductivity (TEM, and galvanic)

 

Sale Army Base
Surveys conducted at the airport to locate service lines underground.
West Melbourne Freight Yard
The yard had been built across tank enclosure and hadn’t been reinforced. GPR and magnetics used.
RAAF
Surveys conducted for the location of underground tanks and service lines associated with the tanks
 

GeoThermal

Elorane have conducted extensive surveys for Geothermal exloration for:

  • Renewable Energy
  • Mining
  • Environment

 

These work involves:

  • General Borehole Logging
  • Groundwater migration and contaminants
  • Site redevelopment
  • Environmental auditing

 

Airborne Magnetic Surveys

Elorane has experience with Airborne Magnetic Surveys and will put together a survey plan for interested parties.