Ground Investigation Reports in Queensland, Australia: Compare Providers for Project Teams

Compare providers by the required deliverable

Choose Geotech Investigations for combined geotechnical and foundation-related work, Douglas Partners for field and laboratory testing, or 1300Locate for utility clearance before intrusive work.[3][5][6]

Geotech Investigations

Core service: Geotechnical investigations, drilling, soil testing and site classification, footing and slab design, slope-stability assessment and related engineering services.[5]

Key limit or coverage: The body copy states that the provider services New South Wales and Queensland, while the page heading claims coverage throughout Australia. Confirm availability for the project location.[5]

Best-fit handoff: Projects seeking ground investigation, drilling, testing and foundation-related design from one provider.[5]

Douglas Partners / Ground Test

Core service: Test pits, drilling, SPT, CPT, groundwater piezometers, compaction testing, rock and concrete testing, laboratory analysis and online access to test reports through its LIMS.[3]

Key limit or coverage: CPT depends on suitable ground conditions and recovers no samples. Test pits are presented as a shallow method, commonly reaching depths of up to 3 m.[3]

Best-fit handoff: Projects requiring physical samples, in-situ testing, laboratory outputs and online test-report delivery.[3]

1300Locate

Core service: Utility locating and mapping, ground-penetrating radar, electromagnetic locating, service verification, subsurface documentation and clearance planning.[6]

Key limit or coverage: Stated coverage is South East Queensland and Northern NSW. The published scope does not verify soil-and-rock sampling, engineering parameters or foundation recommendations.[6]

Best-fit handoff: Utility detection and clearance before drilling, piling, trenching, excavation or other intrusive work.[6]

Choose by the output needed at the next project stage, not by shared terms such as subsurface or geotechnical reporting.[1]

Utility locating is not soil-and-rock investigation

1300Locate’s published inclusions cover underground utility locating and mapping, service verification, risk identification, subsurface documentation and clearance planning.[6] Its source does not confirm soil or rock sampling, laboratory schedules, engineering parameters or foundation recommendations.[6]

The services answer different questions: utility locating identifies underground assets relevant to intrusive work, while geotechnical investigation characterises ground for engineering decisions.[1][6] TMR addresses subsurface utility information separately and excludes utility-detection inspection pits and potholing from the scope of its geotechnical-investigation guideline.[1]

Where a project needs both utility protection and engineering ground information, commission each scope explicitly rather than treating a utility-clearance document as a geotechnical investigation.[1][6]

Shape the scope around the project stage and site

For Queensland TMR projects, the investigation must inform the intended study or design stage and support reasonable geological and geotechnical models.[1] TMR identifies feasibility, options analysis, business case, concept, preliminary design, detailed design and construction as stages to consider.[1]

1. Review existing information. TMR requires a desktop study before site-investigation work to identify known conditions, geotechnical risks and information gaps.[1]
2. Inspect the site. TMR recommends a preliminary visit before developing the scope brief to assess access, verify proposed methods and record relevant existing features.[1]
3. Target the investigation. Methods and locations should suit the geological model, proposed infrastructure, project phase, access, permits and approvals.[1]

The TMR guideline applies to Queensland TMR infrastructure projects. Requirements for other Australian projects need to be confirmed against their applicable standards and approvals.[1]

What to agree before fieldwork

Define the investigation purpose, the design questions and the intended use of the report before selecting individual tests.[1]

• Methods and locations: List each proposed borehole, pit, trench or in-situ test location, the method to be used and who can approve substitutions.[1]
• Laboratory testing: Specify the testing schedule and who may authorise additions. TMR does not prescribe universal minimum sampling or testing frequencies for soil, rock or groundwater; the designer or relevant technical manuals must establish project-specific requirements.[1]
• Survey: State which investigation points, coordinates or levels must be captured and the required deliverable.[1]
• Site controls: Document access, permits, approvals, environmental and cultural-heritage constraints, health and safety hazards, working-hour restrictions and available time.[1]
• Reinstatement and samples: Allocate responsibility for reinstatement and clean-up. Set requirements for sample identification, handling, storage, retention and disposal, including an agreed retention period.[1]
• Commercial handoff: Include reporting, a cost estimate and an indicative timeline as explicit scope items.[1]

TMR references AS 1726 for geotechnical site investigations and AS 5488.1 for subsurface utility information, but its project requirements should not be assumed to apply universally across Australia.[1]

Match field methods to the required information

Douglas Partners says Standard Penetration Testing records hammer blows at discrete depths and recovers a sample. Cone Penetrometer Testing provides a continuous profile but is a blind test, recovers no sample and depends on suitable ground conditions.[3] The selected method therefore needs to reflect whether the design requires physical samples, continuous profiling or both.

Douglas describes test pits and trenches as shallow methods and says they can be more cost-effective than drilling; this is the vendor’s own comparison.[3] Access can also affect the method. As an operational example rather than a universal standard, Inland Rail indicates a 20 m × 20 m borehole work area, while its test-pit areas are generally under 15 m × 10 m.[4]

Investigation depths and test frequencies should be project-specific. TMR sets no minimum soil, rock or groundwater sampling and testing frequencies in this guideline.[1]

Define the factual and interpretive report handoff

State whether the handoff includes field and laboratory results, engineering interpretation, or both. TMR identifies reporting as a separate scope component, so name the report types and contents in the brief.[1]

• Contents: Agree the required logs, test results, drawings, survey information and electronic files.
• Engineering scope: Identify the questions and parameters the report must address, along with its assumptions, limitations and exclusions.
• Accountability: Confirm the required professional sign-off and project-specific acceptance criteria.
• Handoff: Document the draft-review process, included revisions, final submission channel and delivery deadline.

Write file formats, certification, revision rounds and deadlines into the brief. Douglas Partners says clients can access test reports through its online LIMS, but this feature does not confirm that an interpretive engineering report is included.[3]

Confirm price, timing and contract terms

Comparable fixed prices are not published. Geotech Investigations invites customers to request a quote; 1300Locate provides estimates through [email protected]; and the supplied Douglas Partners page gives no amount, fee schedule or quote process.[3][5][6]

Require each written quotation to answer:

• Does the price separately cover mobilisation, fieldwork, laboratory testing, reporting, travel and survey?
• How will access delays, reinstatement, optional work and provisional work be charged?
• Is GST included, and are deposits or payment milestones required?
• What rates and terms apply to variations, postponement or cancellation?
• What programme applies to fieldwork, laboratory work, draft reporting and final handoff?

1300Locate says its turnaround varies with complexity, access, scope and urgency.[6] Ask each provider to put GST treatment, deposits, variation rates, payment and cancellation terms, and programme dates in the written quotation before you accept it.

References

1. Guideline Geotechnical Investigations August 2024 (qld.gov.au)
3. Five Essential Geotechnical Tests | Douglas Partners (douglaspartners.com.au)
4. What Are Geotechnical Investigations? – Inland Rail (inlandrail.com.au)
5. Geotech Investigations Pty Ltd – Geotechnical Engineering, Environmental and Drilling Services (geotechinvestigations.com)
6. Geotechnical Reporting – Geotechnical Testing Services | 1300Locate (1300locate.com.au)