HiQA Geotechnical

Site

Darwin Laboratory

Accreditation No.

13121

Site No.

20522

Date of Accreditation

04 Jul 2011

Address

1/6 Wedding Road
Tivendale, NT 822
Australia

hiqa.com.au

Contact

Mr Nicholas De Beer P: +61 0419223167

Availability

Services available to external clients

HiQA Geotechnical address map

Scope of Accreditation

Print scopes
Darwin Laboratory

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Establishment of annex facilities Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited
Evaluation of geotechnical and civil construction material - Aggregate abrasion Aggregates Abrasion resistance Los Angeles machine value AS 1141.23
Evaluation of geotechnical and civil construction material - Aggregate contaminants Aggregates Weak particles contaminants Sieve analysis AS 1141.32
Organic impurities Colour test

AS 1141.34

Clay and fine silt Settling

AS 1141.33

Evaluation of geotechnical and civil construction material - Aggregate properties Aggregates Bulk density Compacted; Uncompacted

AS 1141.4

Shape Flakiness

AS 1141.15

Particle size distribution Sieve analysis of material finer than 75 µm

AS 1141.12

Particle density of fine aggregate; Water absorption of fine aggregate Weighing-in-water

AS 1141.5

Shape Proportional calliper

AS 1141.14

Particle density of coarse aggregate; Water absorption of coarse aggregate Weighing-in-water

AS 1141.6.1

Shape Average least dimension

AS 1141.20.1, AS 1141.20.2, AS 1141.20.3

Particle size distribution Sieve analysis

AS 1141.11.1

Shape Crushed faces

AS 1141.18

Evaluation of geotechnical and civil construction material - Aggregate soundness Aggregates Soundness Degradation factor on coarse aggregate AS 1141.25.2
Soundness Exposure to sodium sulfate solution AS 1141.24
Evaluation of geotechnical and civil construction material - Aggregate strength Aggregates Wet/dry strength variation Not applicable AS 1141.22
Evaluation of geotechnical and civil construction material - Asphalt extraction and grading Asphalts Bitumen content and aggregate grading Pressure filter

AS/NZS 2891.3.3

Evaluation of geotechnical and civil construction material - Asphalt field density Asphalts Density ratio and air voids Not applicable

AS/NZS 2891.14.5

Evaluation of geotechnical and civil construction material - Asphalt mechanical properties Asphalts Marshall stability and flow Not applicable

AS/NZS 2891.5

Evaluation of geotechnical and civil construction material - Asphalt volumetric properties Asphalts Bulk density Mensuration

AS/NZS 2891.9.2

Voids and density relationship Not applicable

AS/NZS 2891.8 (clause 4 (f) and 5 (a) only)

Maximum density Methylated spirits displacement

AS/NZS 2891.7.1

Evaluation of geotechnical and civil construction material - Concrete, grout and mortar consistence in situ Concrete, grout and mortar Slump flow Cone; J-ring

AS 1012.3.1, AS 1012.3.5

Evaluation of geotechnical and civil construction material - Concrete, grout and mortar properties Concrete, grout and mortar Air content of freshly mixed concrete Reduced air pressure AS 1012.4.2
Flexural strength Modulus of rupture AS 1012.11
Compressive strength Cylinder

AS 1012.9

Mass per unit volume - Fresh concrete In situ measurement using fixed volume measure AS 1012.5
Evaluation of geotechnical and civil construction material - Concrete, grout and mortar specimen manufacture and curing Concrete, grout and mortar Specimen manufacture and curing Curing flexural strength specimens in the laboratory; In situ manufacture and curing of flexural strength specimens AS 1012.8.2
Specimen manufacture and curing Curing cylinder specimens in the laboratory; In situ manufacture and curing of cylindrical specimens

AS 1012.8.1

Evaluation of geotechnical and civil construction material - Road pavement surfacing characteristics Road pavements Penetration depth Ball embedment

DOI (NT) Method NTTM 215.1

Layer thickness Not applicable

DOI (NT) Method NTTM 216.1

Texture depth Sand patch

DOI (NT) Method NTTM 305.1

Evaluation of geotechnical and civil construction material - Soil classification Soils Sieve analysis Not applicable

AS 1289.3.6.1

Moisture content Drying oven

AS 1289.2.1.1

Plasticity index Casagrande

AS 1289.3.3.1

Plastic limit Not applicable

AS 1289.3.2.1

Linear shrinkage Not applicable

AS 1289.3.4.1

Liquid limit Casagrande

AS 1289.3.1.1, AS 1289 3.1.2

Description, identification and classification Not applicable

AS 1726 Tables 9 and 10 (Laboratory classification elements only)

Evaluation of geotechnical and civil construction material - Soil compaction characteristics Soils Assignment of optimum moisture content/maximum dry density (OMC/MDD) Not applicable

AS 1289.5.4.2

Dry density/moisture content relationship Standard compactive effort

AS 1289.5.1.1

Dry density/moisture content relationship Modified compactive effort

AS 1289.5.2.1,

DOI (NT) Method NTTM 201.3

Evaluation of geotechnical and civil construction material - Soil dispersion Soils Dispersion Emerson class AS 1289.3.8.1
Evaluation of geotechnical and civil construction material - Soil field density Soils Dry density ratio; Moisture ratio Calculation; Measured; Statistical selection of reference values

AS 1289.5.4.1, AS 1289.5.4.3

Field compaction for conformance Calculation

DOI (NT) Method NTCP 102.1

Density - In situ; Field moisture content Nuclear gauge

AS 1289.5.8.1

Evaluation of geotechnical and civil construction material - Soil in situ penetration Soils Penetration - In situ Dynamic cone; Perth sand penetrometer AS 1289.6.3.2, AS 1289.6.3.3
Evaluation of geotechnical and civil construction material - Soil laboratory bearing properties Soils Bearing ratio Remoulded specimens AS 1289.6.1.1
Evaluation of geotechnical and civil construction material - Soil sample preparation Soils Preparation of disturbed samples Not applicable

AS 1289.1.1

Evaluation of geotechnical and civil construction material - Soil stabilisation Soils Compressive strength Uniaxial unconfined

AS 5101.4, DOI (NT) Method NTTM 203.01

Sample collection Aggregates Not applicable Aggregate from a stockpile

AS 1141.3.1

Asphalts Not applicable Extraction of an asphalt core - Wet technique

AS 2891.1.2

Not applicable Uncompacted asphalt

AS/NZS 2891.1.1

Concrete, grout and mortar Not applicable Fresh concrete from a mixer; Fresh concrete from deposited concrete

AS 1012.1

Soils Not applicable Site selection - Random sampling; Site selection - Random stratified sampling

AS 1289.1.4.1, AS 1289.1.4.2,

DOI (NT) Method NTCP 103.1

Not applicable Disturbed sampling from earthwork; Disturbed soil sampling from a pavement; Disturbed soil sampling from a stockpile; Disturbed soil sampling from a windrow; Disturbed soil sampling in situ

AS 1289.1.2.1

Carpentaria Highway Upgrade 2 Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Carpentaria Highway Upgrade 2 Annex Facility, Site No 27208 is established from 25 August 2025 until 30 May 2027 for the Carpentaria Highway upgrade CH140 - 175 for Exact Contracting, Contract No. T648/24.
Core Lithium Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Core Lithium Annex Facility. Site No. 27614 is established from 19 October 2026 until 20 January 2027 for Lithium Developments, Contract No.: PO23911.
SLSCO Project Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The SLSCO Project Annex Facility. Site# 27498 is established from 15 June 2026 until 15 December 2026 for SLSCO, Contract No. N62742-25-C-1308.
Sorby Hills Silver Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Sorby Hills Silver Annex Facility. Site# 27533 is established from 22 July 2026 until 22 November 2026 for Boab Metals, Contract No. T834/26.
Tanami Expansion #2 Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Tanami Expansion #2 Annex Facility, Site No 25871 is established from 1 January 2026 to 30 May 2027 for the Tanami Expansion #2 Soil & Aggregate Scope Variation for Newmont Australia (Tanami Operations); Contract T519/23
Tanami Road – CH17km to CH38km Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Tanami Road - CH17km to CH38km Annex Facility. Site No. 27583 is established from 25 September 2026 until 16 November 2026 for Sitzler, Contract No. PO: 145047.
Tanami Road 3 Annex Facility

ISO/IEC 17025 (2017)

Infrastructure and Asset Integrity

Service Product Determinant Technique Procedure Limitations
Annex facility Materials defined by all or some for which the site is accredited Determinations defined by all or some for which the site is accredited Techniques defined by all or some for which the site is accredited The Tanami Road 3 Annex Facility. Site No. 27383 is established from 9 February 2026 until 20 December 2026 for the Tanami Road (421 – 455KM) – Upgrade and Sealing project for Exact Contracting, Contract No.T671/25.

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