SIST-TS CEN ISO/TS 24283-1:2022

Geotechnical investigation and testing - Qualification criteria and assessment - Part 1: Qualified technician and qualified operator (ISO/TS 24283-1:2022)

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

Geotechnische Erkundung und Untersuchung - Qualifikationskriterien - Teil 1: Qualifizierter Techniker und Bediener (ISO/TS 24283-1:2022)

Dieses Dokument legt die Qualifikationskriterien für eine Person fest, die Probenahmen, Prüfungen, Messungen, das Monitoring und den Einbau von Ausrüstungen (z. B. Piezometer, Erdwärmesonden, Inklinometer und Extensometer) im Rahmen geotechnischer Erkundungen ausführt.

Reconnaissance et essais géotechniques - Critères de qualification et évaluation - Partie 1 : Technicien et opérateur qualifié (ISO/TS 24283-1:2022)

Geotehnično preiskovanje in preskušanje - Kvalifikacijska merila in ocenjevanje - 1. del: Usposobljen tehnik in usposobljen upravljavec (ISO/TS 24283-1:2022)

Ta dokument določa kvalifikacijska merila za osebe, ki izvajajo vzorčenje, preskušanje, merjenje, nadzorovanje in nameščanje opreme (npr. piezometrov, izmenjevalnikov toplote v vrtinah, klinometrov in ekstenzometrov) v okviru geotehničnega preiskovanja.

General Information

• Status: Published
• Public Enquiry End Date: 18-Nov-2021
• Publication Date: 13-Apr-2022
• ICS: 03.100.30 - Management of human resources
• ICS: 93.020 - Earthworks. Excavations. Foundation construction. Underground works
• Technical Committee: KON - Structures
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2022
• Due Date: 06-Jun-2022
• Completion Date: 14-Apr-2022
• Ref Project: CEN ISO/TS 24283-1:2022 - Geotechnical investigation and testing - Qualification criteria and assessment - Part 1: Qualified technician and qualified operator (ISO/TS 24283-1:2022)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CEN ISO/TS 24283-1:2022
01-maj-2022
Geotehnično preiskovanje in preskušanje - Kvalifikacijska merila in ocenjevanje -
1. del: Usposobljen tehnik in usposobljen upravljavec (ISO/TS 24283-1:2022)
Geotechnical investigation and testing - Qualification criteria and assessment - Part 1:
Qualified technician and qualified operator (ISO/TS 24283-1:2022)
Geotechnische Erkundung und Untersuchung - Qualifikationskriterien - Teil 1:
Qualifizierter Techniker und Bediener (ISO/TS 24283-1:2022)
Reconnaissance et essais géotechniques - Critères de qualification et évaluation - Partie
1 : Technicien et opérateur qualifié (ISO/TS 24283-1:2022)
Ta slovenski standard je istoveten z: CEN ISO/TS 24283-1:2022
ICS:
03.100.30 Vodenje ljudi Management of human
resources
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
SIST-TS CEN ISO/TS 24283-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN ISO/TS 24283-1:2022

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SIST-TS CEN ISO/TS 24283-1:2022


CEN ISO/TS 24283-1
TECHNICAL SPECIFICATION

SPÉCIFICATION TECHNIQUE

January 2022
TECHNISCHE SPEZIFIKATION
ICS 03.100.30; 93.020
English Version

Geotechnical investigation and testing - Qualification
criteria and assessment - Part 1: Qualified technician and
qualified operator (ISO/TS 24283-1:2022)
Reconnaissance et essais géotechniques - Critères de Geotechnische Erkundung und Untersuchung -
qualification et évaluation - Partie 1 : Technicien et Qualifikationskriterien - Teil 1: Qualifizierter
opérateur qualifié (ISO/TS 24283-1:2022) Techniker und Bediener (ISO/TS 24283-1:2022)
This Technical Specification (CEN/TS) was approved by CEN on 24 December 2021 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 24283-1:2022 E
worldwide for CEN national Members.

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SIST-TS CEN ISO/TS 24283-1:2022
CEN ISO/TS 24283-1:2022 (E)
Contents Page
European foreword . 3

2

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SIST-TS CEN ISO/TS 24283-1:2022
CEN ISO/TS 24283-1:2022 (E)
European foreword
This document (CEN ISO/TS 24283-1:2022) has been prepared by Technical Committee ISO/TC 182
"Geotechnics" in collaboration with Technical Committee CEN/TC 341 “Geotechnical Investigation and
Testing” the secretariat of which is held by BSI.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Specification : Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO/TS 24283-1:2022 has been approved by CEN as CEN ISO/TS 24283-1:2022 without any
modification.


3

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SIST-TS CEN ISO/TS 24283-1:2022
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

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SIST-TS CEN ISO/TS 24283-1:2022
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

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SIST-TS CEN ISO/TS 24283-1:2022
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

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SIST-TS CEN ISO/TS 24283-1:2022
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.
iv
  © ISO 2022 – All rights reserved

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SIST-TS CEN ISO/TS 24283-1:2022
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).
v
© ISO 2022 – All rights reserved

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SIST-TS CEN ISO/TS 24283-1:2022
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);
1
© ISO 2022 – All rights reserved

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SIST-TS CEN ISO/TS 24283-1:2022
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.
2
  © ISO 2022 – All rights reserved

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SIST-TS CEN ISO/TS 24283-1:2022
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.
3
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SIST-TS CEN ISO/TS 24283-1:2022
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.
4
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SIST-TS CEN ISO/TS 24283-1:2022
ISO/TS 24283-1:2022(E)
Table A.2 (continued)
Subject Relevant standard Minimum
years of rel-
evant work
...

SLOVENSKI STANDARD
kSIST-TS FprCEN ISO/TS 24283-1:2021
01-november-2021
Geotehnično preiskovanje in preskušanje - Kvalifikacijska merila in ocenjevanje -
1. del: Usposobljen tehnik in usposobljen upravljavec (ISO/PRF TS 24283-1:2021)
Geotechnical investigation and testing - Qualification criteria and assessment - Part 1:
Qualified technician and qualified operator (ISO/PRF TS 24283-1:2021)
Geotechnische Erkundung und Untersuchung - Qualifikationskriterien und Bewertung -
Teil 1: Qualifiziertes Fachpersonal (ISO/PRF TS 24283-1:2021)
Reconnaissance et essais géotechniques - Critères de qualification et évaluation - Partie
1 : Technicien et opérateur qualifié (ISO/PRF TS 24283-1:2021)
Ta slovenski standard je istoveten z: FprCEN ISO/TS 24283-1
ICS:
03.100.30 Vodenje ljudi Management of human
resources
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
kSIST-TS FprCEN ISO/TS 24283-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST-TS FprCEN ISO/TS 24283-1:2021

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2021 – All rights reserved

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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kSIST-TS FprCEN ISO/TS 24283-1:2021
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

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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.
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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.
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