Geotechnical investigation and testing — Qualification criteria and assessment — Part 1: Qualified technician and qualified operator

This document specifies the qualification criteria for a person performing sampling, testing, measuring, monitoring and installation of equipment (e.g. piezometers, borehole heat exchangers, inclinometers and extensometers) in the framework of geotechnical investigation.

Reconnaissance et essais géotechniques - Critères de qualification et évaluation — Partie 1: Technicien et opérateur qualifié

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TECHNICAL ISO/TS
SPECIFICATION 24283-1
First edition
2022-01
Geotechnical investigation and
testing — Qualification criteria and
assessment —
Part 1:
Qualified technician and qualified
operator
Reconnaissance et essais géotechniques - Critères de qualification et
évaluation —
Partie 1: Technicien et opérateur qualifié
Reference number
ISO/TS 24283-1:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO/TS 24283-1:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 24283-1:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2  Normative references ..................................................................................................................................................................................... 1

3  Terms and definitions .................................................................................................................................................................................... 1

4  Qualification criteria ........................................................................................................................................... ............................................1

Annex A (informative) Assessment and re-assessment of qualified technicians and

operators ...................................................................................................................................................................................................................... 3

Annex B (informative) Training course and preparation for the assessment ........................................................9

Bibliography .............................................................................................................................................................................................................................17

iii
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/TS 24283-1:2022(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 182, Geotechnics, in collaboration with

the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical

Investigation and Testing, in accordance with the Agreement on technical cooperation between ISO and

CEN (Vienna Agreement).
A list of all parts in the ISO 24283 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/TS 24283-1:2022(E)
Introduction

The ISO 24283 series specifies the qualification criteria for geotechnical investigation and testing and

has three parts:
— Part 1: Qualified technician and qualified operator
— Part 2: Responsible expert
— Part 3: Qualified enterprise

The fulfilment of the technical criteria by the enterprise or the individual can be proven by:

a) a declaration of conformity by a contractor (first party control);
b) a declaration of conformity by a client (second party control);

c) a declaration of conformity by a conformity assessment body (third party control).

© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/TS 24283-1:2022(E)
Geotechnical investigation and testing — Qualification
criteria and assessment —
Part 1:
Qualified technician and qualified operator
1 Scope

This document specifies the qualification criteria for a person performing sampling, testing, measuring,

monitoring and installation of equipment (e.g. piezometers, borehole heat exchangers, inclinometers

and extensometers) in the framework of geotechnical investigation.
2  Normative references
There are no normative references in this document.
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
qualified technician
qualified operator

person who has documented competence to perform specified parts of identification and description

of soil and rock sampling, laboratory and field testing, measuring, monitoring and installation of

equipment
3.2
vocational training
on-the-job or work place training
4  Qualification criteria

The qualified technician and qualified operator should have documented competence regarding the

following:

a) basic knowledge of the purpose of geotechnical ground investigation, of geological, soil and rock

properties and hydrogeological principles as relevant for the respective standard;

b) specified parts of identification and description of soil and rock, sampling, laboratory and field

testing, measuring, monitoring and installation of any equipment in boreholes (e.g. piezometers,

borehole heat exchangers, inclinometers and extensometers) according to the relevant standard

(see Bibliography) in the framework of geotechnical investigation;
c) relevant work experience (e.g. see Table A.1 or Table A.2);
© ISO 2022 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/TS 24283-1:2022(E)
d) preparation of records according to the relevant standard (see Bibliography);
e) the relevant health, safety and environmental regulations;

f) the functioning, safe operation and maintenance of the equipment (including field checks);

g) the relevant part of quality management system.

Assessment and re-assessment of qualified technicians should be carried out in accordance with

Annex A.
© ISO 2022 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/TS 24283-1:2022(E)
Annex A
(informative)
Assessment and re-assessment of qualified technicians and
operators
A.1 General

This annex gives guidelines and recommendations for an assessment body in addition to ISO/IEC 17024.

A.2 Prerequisites for admission to assessment
The prerequisites for admission to the qualification assessment should be:
— minimum age at the time of the assessment: 18 years;
— sufficient knowledge of the assessment language;

— completed vocational training of a relevant subject and proof of suitable work experience (see

Table A.1) in an enterprise that performs specified parts of identification and description of soil

and rock, sampling, laboratory and field testing, measuring, monitoring and/or installation of

equipment in boreholes; or

proof of suitable work experience (see Table A.2) in an enterprise that performs specified parts of

sampling, laboratory and field testing, measuring, monitoring and/or installation of equipment in

boreholes according to the relevant standards;
— documented formal training in preparation of the assessment (see Annex B).

Table A.1 — Requirements concerning the work experience for a qualified technician and

operator for field testing with a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Identification and description of soil and rock ISO 14688-1 and ISO 14689 1
Geothermal response test ISO 17628 1
Installation of a geothermal heat exchanger ISO 17628 1
Extensometer measurements ISO 18674-2 1
Installation of extensometers ISO 18674-2 1
Inclinometer measurements ISO 18674-3 1
Installation of inclinometers ISO 18674-3 1
Groundwater measurements in open systems ISO 18674-4 1
Groundwater measurements in closed systems ISO 18674-4 1
Installation of piezometers (open systems) ISO 18674-4 1
Installation of piezometers (closed systems) ISO 18674-4 2
Water permeability tests in a borehole ISO 22282-2 1
using open systems
NOTE This list can be expanded by national standards.
© ISO 2022 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/TS 24283-1:2022(E)
Table A.1 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Water pressure tests ISO 22282-3 1
Pumping tests ISO 22282-4 1
Infiltrometer tests ISO 22282-5 1
Water permeability tests in a borehole ISO 22282-6 2
using closed systems
Sampling in soil (sampling categories A to C) ISO 22475 2
Sampling in soil (sampling categories C to E) ISO 22475 1
Sampling in soil (sampling category E) ISO 22475 1
Sampling in rock (sampling categories A to C) ISO 22475 2
Sampling in rock (sampling categories C to E) ISO 22475 1
Sampling in rock (sampling category E) ISO 22475 1
Electric cone penetration tests ISO 22476-1 1
Dynamic probing ISO 22476-2 1
Standard penetration test ISO 22476-3 1
Ménard pressuremeter test ISO 22476-4 1
Flexible dilatometer test ISO 22476-5 1
Self-boring pressuremeter test ISO 22476-6 1
Borehole jack test ISO 22476-7 1
Full displacement dilatometer ISO 22476-8 1
Field vane test ISO 22476-9 1
Weight sounding test ISO 22476-10 1
Flat dilatometer test ISO 22476-11 1
Mechanical cone penetration test ISO 22476-12 1
Borehole dynamic probing ISO 22476-14 1
Measuring while drilling ISO 22476-15 1
NOTE This list can be expanded by national standards.

Table A.2 — Requirements concerning the work experience for a laboratory qualified

technician and operator with a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Soil testing
Understanding of the basis for lab testing To be determined 1
Preparation of samples To be determined 1
Recognition of sample disturbance To be determined and ISO 22475 1
Identification and description of soil and rock ISO 14688-1 and ISO 14689 1
Water content test ISO 17892-1 1

NOTE 1 This table does not attempt to list all of the specialist soil and rock tests that are performed less regularly than the

routine tests given in the table.

NOTE 2 This list can however be expanded by national standards to reflect the types of tests undertaken in different

countries.
© ISO 2022 – All rights reserved
---------------------- Page: 9 ----------------------
ISO/TS 24283-1:2022(E)
Table A.2 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Atterberg limit tests ISO 17892-12 1
Particle size distribution tests (for both fine and coarse ISO 17892-4 1
soils)
Particle density ISO 17892-3 1
Dry density – water content relationship test To be determined 2
California bearing ratio (CBR) test To be determined 1
Moisture condition value (MCV) To be determined 1
Undrained triaxial strength ISO 17892-8 2
Undrained triaxial strength with pore water pressure ISO 17892-9 3
measurement
Drained triaxial strength with porewater pressure ISO 17892-9 3
measurement
Ring shear test To be determined 2
Small shear box test ISO 17892-10 2
Large shear box test ISO 17892-10 2
Triaxial permeability test ISO 17892-11 3
Hydraulic cell permeability ISO 17892-11 3
Rock testing
Point load test To be determined 1
Unconfined compressive strength (UCS) To be determined 2
Brazil test To be determined 1
Rock direct shear test To be determined 1
Aggregate condition value (ACV) To be determined 1
10 % fines test To be determined 1
Aggregate impact value (AIV) To be determined 1
Los Angeles abrasion test To be determined 1

NOTE 1 This table does not attempt to list all of the specialist soil and rock tests that are performed less regularly than the

routine tests given in the table.

NOTE 2 This list can however be expanded by national standards to reflect the types of tests undertaken in different

countries.

Table A.3 — Requirements concerning the professional experience for a qualified technician

and operator for field testing without a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Identification and description of soil and rock ISO 14688-1 and ISO 14689 3
Geothermal response test ISO 17628 2
Installation of a geothermal heat exchanger ISO 17628 3
Extensometer measurements ISO 18674-2 2
Installation of extensometers ISO 18674-2 3
Inclinometer measurements ISO 18674-3 2
NOTE This list can be expanded by national standards.
© ISO 2022 – All rights reserved
---------------------- Page: 10 ----------------------
ISO/TS 24283-1:2022(E)
Table A.3 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Installation of inclinometers ISO 18674-3 3
Groundwater measurements in open systems ISO 18674-4 1
Groundwater measurements in closed systems ISO 18674-4 2
Installation of piezometers (open systems) ISO 18674-4 3
Installation of piezometers (closed systems) ISO 18674-4 3
Water permeability tests in a borehole ISO 22282-2 3
using open systems
Water pressure tests ISO 22282-3 3
Pumping tests ISO 22282-4 3
Infiltrometer tests ISO 22282-5 1
Water permeability tests in a borehole ISO 22282-6 2
using closed systems
Sampling in soil
...

TECHNICAL ISO/TS
SPECIFICATION 24283-1
First edition
Geotechnical investigation and
testing — Qualification criteria and
assessment —
Part 1:
Qualified technician and qualified
operator
Reconnaissance et essais géotechniques - Critères de qualification et
évaluation —
Partie 1: Technicien et opérateur qualifié
PROOF/ÉPREUVE
Reference number
ISO/TS 24283-1:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO/TS 24283-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 24283-1:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2  Normative references ...................................................................................................................................................................................... 1

3  Terms and definitions ..................................................................................................................................................................................... 1

4  Qualification criteria ........................................................................................................................................................................................ 1

Annex A (informative) Assessment and re-assessment of qualified technicians and operators ...........3

Annex B (informative) Training course and preparation for the assessment ...........................................................9

Bibliography .............................................................................................................................................................................................................................17

© ISO 2021 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 3 ----------------------
ISO/TS 24283-1:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 182, Geotechnics, in collaboration with

the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical

Investigation and Testing, in accordance with the Agreement on technical cooperation between ISO and

CEN (Vienna Agreement).
A list of all parts in the ISO 24283 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/TS 24283-1:2021(E)
Introduction

The ISO 24283 series specifies the qualification criteria for geotechnical investigation and testing and

has three parts:
— Part 1: Qualified technician and qualified operator
— Part 2: Responsible expert
— Part 3: Qualified enterprise

The fulfilment of the technical criteria by the enterprise or the individual can be proven by:

a) a declaration of conformity by a contractor (first party control);
b) a declaration of conformity by a client (second party control);

c) a declaration of conformity by a conformity assessment body (third party control).

© ISO 2021 – All rights reserved PROOF/ÉPREUVE v
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/TS 24283-1:2021(E)
Geotechnical investigation and testing — Qualification
criteria and assessment —
Part 1:
Qualified technician and qualified operator
1 Scope

This document specifies the qualification criteria for a person performing sampling, testing, measuring,

monitoring and installation of equipment (e.g. piezometers, borehole heat exchangers, inclinometers

and extensometers) in the framework of geotechnical investigation.
2  Normative references
There are no normative references in this document.
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
qualified technician
qualified operator

person who has documented competence to perform specified parts of identification and description

of soil and rock sampling, laboratory and field testing, measuring, monitoring and installation of

equipment
3.2
vocational training
on-the-job or work place training
4  Qualification criteria

The qualified technician and qualified operator should have documented competence regarding the

following:

a) basic knowledge of the purpose of geotechnical ground investigation, of geological, soil and rock

properties and hydrogeological principles as relevant for the respective standard;

b) specified parts of identification and description of soil and rock, sampling, laboratory and field

testing, measuring, monitoring and installation of any equipment in boreholes (e.g. piezometers,

borehole heat exchangers, inclinometers and extensometers) according to the relevant standard

(see Bibliography) in the framework of geotechnical investigation;
c) relevant work experience (e.g. see Table A.1 or Table A.2);
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 1
---------------------- Page: 6 ----------------------
ISO/TS 24283-1:2021(E)
d) preparation of records according to the relevant standard (see Bibliography);
e) the relevant health, safety and environmental regulations;

f) the functioning, safe operation and maintenance of the equipment (including field checks);

g) the relevant part of quality management system.

Assessment and re-assessment of qualified technicians should be carried out in accordance with

Annex A.
2 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/TS 24283-1:2021(E)
Annex A
(informative)
Assessment and re-assessment of qualified technicians and
operators
A.1 General

This annex gives guidelines and recommendations for an assessment body in addition to ISO/IEC 17024.

A.2 Prerequisites for admission to assessment
The prerequisites for admission to the qualification assessment should be:
— minimum age at the time of the assessment: 18 years;
— sufficient knowledge of the assessment language;

— completed vocational training of a relevant subject and proof of suitable work experience (see

Table A.1) in an enterprise that performs specified parts of identification and description of soil

and rock, sampling, laboratory and field testing, measuring, monitoring and/or installation of

equipment in boreholes; or

proof of suitable work experience (see Table A.2) in an enterprise that performs specified parts of

sampling, laboratory and field testing, measuring, monitoring and/or installation of equipment in

boreholes according to the relevant standards;
— documented formal training in preparation of the assessment (see Annex B).

Table A.1 — Requirements concerning the work experience for a qualified technician and

operator for field testing with a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Identification and description of soil and rock ISO 14688-1 and ISO 14689 1
Geothermal response test ISO 17892 1
Installation of a geothermal heat exchanger ISO 17892 1
Extensometer measurements ISO 18674-2 1
Installation of extensometers ISO 18674-2 1
Inclinometer measurements ISO 18674-3 1
Installation of inclinometers ISO 18674-3 1
Groundwater measurements in open systems ISO 18674-4 1
Groundwater measurements in closed systems ISO 18674-4 1
Installation of piezometers (open systems) ISO 18674-4 1
Installation of piezometers (closed systems) ISO 18674-4 2
Water permeability tests in a borehole ISO 22282-2 1
using open systems
NOTE This list can be expanded by national standards.
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 3
---------------------- Page: 8 ----------------------
ISO/TS 24283-1:2021(E)
Table A.1 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Water pressure tests ISO 22282-3 1
Pumping tests ISO 22282-4 1
Infiltrometer tests ISO 22282-5 1
Water permeability tests in a borehole ISO 22282-6 2
using closed systems
Sampling in soil (sampling categories A to C) ISO 22475 2
Sampling in soil (sampling categories C to E) ISO 22475 1
Sampling in soil (sampling category E) ISO 22475 1
Sampling in rock (sampling categories A to C) ISO 22475 2
Sampling in rock (sampling categories C to E) ISO 22475 1
Sampling in rock (sampling category E) ISO 22475 1
Electric cone penetration tests ISO 22476-1 1
Dynamic probing ISO 22476-2 1
Standard penetration test ISO 22476-3 1
Ménard pressuremeter test ISO 22476-4 1
Flexible dilatometer test ISO 22476-5 1
Self-boring pressuremeter test ISO 22476-6 1
Borehole jack test ISO 22476-7 1
Full displacement dilatometer ISO 22476-8 1
Field vane test ISO 22476-9 1
Weight sounding test ISO 22476-10 1
Flat dilatometer test ISO 22476-11 1
Mechanical cone penetration test ISO 22476-12 1
Borehole dynamic probing ISO 22476-14 1
Measuring while drilling ISO 22476-15 1
NOTE This list can be expanded by national standards.

Table A.2 — Requirements concerning the work experience for a laboratory qualified

technician and operator with a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Soil testing
Understanding of the basis for lab testing To be determined 1
Preparation of samples To be determined 1
Recognition of sample disturbance To be determined and ISO 22475 1
Identification and description of soil and rock ISO 14688-1 and ISO 14689 1
Water content test ISO 17892-1 1

NOTE 1 This table does not attempt to list all of the specialist soil and rock tests that are performed less regularly than the

routine tests given in the table.

NOTE 2 This list can however be expanded by national standards to reflect the types of tests undertaken in different

countries.
4 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 9 ----------------------
ISO/TS 24283-1:2021(E)
Table A.2 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Atterberg limit tests ISO 17892-12 1
Particle size distribution tests (for both fine and coarse ISO 17892-4 1
soils)
Particle density ISO 17892-3 1
Dry density – water content relationship test To be determined 2
California bearing ratio (CBR) test To be determined 1
Moisture condition value (MCV) To be determined 1
Undrained triaxial strength ISO 17892-8 2
Undrained triaxial strength with pore water pressure ISO 17892-9 3
measurement
Drained triaxial strength with porewater pressure ISO 17892-9 3
measurement
Ring shear test To be determined 2
Small shear box test ISO 17892-10 2
Large shear box test ISO 17892-10 2
Triaxial permeability test ISO 17892-11 3
Hydraulic cell permeability ISO 17892-11 3
Rock testing
Point load test To be determined 1
Unconfined compressive strength (UCS) To be determined 2
Brazil test To be determined 1
Rock direct shear test To be determined 1
Aggregate condition value (ACV) To be determined 1
10 % fines test To be determined 1
Aggregate impact value (AIV) To be determined 1
Los Angeles abrasion test To be determined 1

NOTE 1 This table does not attempt to list all of the specialist soil and rock tests that are performed less regularly than the

routine tests given in the table.

NOTE 2 This list can however be expanded by national standards to reflect the types of tests undertaken in different

countries.

Table A.3 — Requirements concerning the professional experience for a qualified technician

and operator for field testing without a completed vocational training of a relevant subject

Subject Relevant standard Minimum
years of rel-
evant work
experience
Identification and description of soil and rock ISO 14688-1 and ISO 14689 3
Geothermal response test ISO 17892 2
Installation of a geothermal heat exchanger ISO 17892 3
Extensometer measurements ISO 18674-2 2
Installation of extensometers ISO 18674-2 3
Inclinometer measurements ISO 18674-3 2
NOTE This list can be expanded by national standards.
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 5
---------------------- Page: 10 ----------------------
ISO/TS 24283-1:2021(E)
Table A.3 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
experience
Installation of inclinometers ISO 18674-3 3
Groundwater measurements in open systems ISO 18674-4 1
Groundwater measurements in closed systems ISO 18674-4 2
Installation of piezometers (open systems) ISO 18674-4 3
Installation of piezometers (closed systems) ISO 18674-4 3
Water permeability tests in a borehole ISO 22282-2 3
using open systems
Water pressure tests ISO 22282-3 3
Pumping tests ISO 22282-4 3
Infiltrometer tests ISO 22282-5 1
Water permeability tests in a borehole ISO 22282-6 2
using closed systems
Sampling in soil (sampling categories A t E) ISO 22475 3
Sampling in soil (sampling categories C to E) ISO 22475 2
Sampling in soil (
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