Guidelines for the inventory control, management, decontamination and/or disposal of electrical equipment and insulating liquids containing PCBs

The scope of this Technical report is to provide guidance for the activities of inventory, control, management, decontamination and/or disposal of equipment and containers with insulating liquid containing PCBs, in compliance with the Council Directives (96/59/EC), using Best Available Techniques - BAT - (96/61/EC), Commission Decision (2001/68/EC), Stockholm Convention on Persistent Organic Pollutants (POPs) and/or with appropriate national or local legislation. This Technical report is addressed, in particular, toward the Life Cycle Management (LCM) of insulating liquids and it has been developed in accordance with the following objectives: a) reduction of risks for workers, public health and the environment, arising from human error, malfunction, or failures of the equipment that could cause fires or spillage of hazardous and Persistent Organic Pollutants (POPS)s; b) implementation of the “Best Available Techniques” (BAT),”Best Environmental Practices”(BEP)and methodologies available for safety, whilst taking into account the surroundings and the criteria of self-sufficiency and functional recovery; c) technical feasibility of the activities within the prescribed time schedules, taking into account current legislation and economic feasibility. NOTE 1 For those CENELEC countries in which the European Directives do not apply, this Technical report has an informative purpose only. Different limits from those given in the present Technical report are required in some countries. NOTE 2 For those countries outside of European Community the Stockholm Convention on Persistent Organic Pollutants (POPs) should be applied. NOTE 3 When reading this Technical report, reference should also be made to Annex C of EN 50195 and Annex B of EN 50225, because in some EU countries (i.e. France, Italy, Poland, Spain, etc.) there are other mandatory requirements.

Smernice za obvladovanje zalog, upravljanje, dekontaminacijo oziroma odstranjevanje električne opreme in izolacijskih tekočin, ki vsebujejo PCB

Namen tega tehničnega poročila je zagotavljanje vodila za obvladovanje zalog, upravljanje, dekontaminacijo oziroma odstranjevanje opreme in vsebnikov z izolacijskimi tekočinami, ki vsebujejo PCB, v skladu z direktivo Sveta (96/59/ES), z uporabo najboljših razpoložljivih tehnik - BAT – (96/61/ES), odločbo Komisije (2001/68/ES), Stockholmsko konvencijo o obstojnih organskih onesnaževalcih (POP) in/ali ustrezno nacionalno ali lokalno zakonodajo. To tehnično poročilo obravnava predvsem upravljanje življenjskega cikla (LCM) izolacijskih tekočin in je bil pripravljen v skladu z naslednjimi cilji:
a) zmanjševanje tveganja za delavce, javno zdravje in okolje, do katerega prihaja zaradi človeških napak, nepravilnega delovanja ali okvar opreme, ki bi lahko povzročili požare ali razlitje nevarnih in obstojnih organskih onesnaževalcev (POP);
b) izvajanje »najboljših razpoložljivih tehnik« (BAT), »najboljših okoljskih praks« (BEP) in metodologij, ki so na voljo za varnost, ob upoštevanju okolice in meril samozadostnosti ter funkcionalne obnove;
c) tehnična izvedljivost dejavnosti v predpisanem časovnem okviru, ob upoštevanju veljavne zakonodaje in ekonomske izvedljivosti.
OPOMBA 1: Za tiste države CENELEC, v katerih evropske direktive ne veljajo, je to tehnično poročilo le informativnega pomena. V nekaterih državah so zahtevane meje, ki se razlikujejo od mej, navedenih v tem tehničnem poročilu.
OPOMBA 2: Za države zunaj Evropske skupnosti velja Stockholmska konvencija o obstojnih organskih onesnaževalcih (POP).
OPOMBA 3: Ob branju tega tehničnega poročila se je treba sklicevati tudi na Dodatek C EN 50195 in Dodatek B EN 50225, ker so v nekaterih državah EU (tj. v Franciji, Italiji, na Poljskem, v Španiji, itd.) veljajo druge obvezne zahteve.

General Information

Status
Published
Publication Date
04-Feb-2010
Current Stage
6060 - Document made available
Start Date
05-Feb-2010
Due Date
07-Mar-2010
Completion Date
05-Feb-2010

Buy Standard

Technical report
-TP CLC/TR 50503:2010 - BARVE: stran 37
English language
43 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST-TP CLC/TR 50503:2010
01-april-2010
6PHUQLFH]DREYODGRYDQMH]DORJXSUDYOMDQMHGHNRQWDPLQDFLMRR]LURPD
RGVWUDQMHYDQMHHOHNWULþQHRSUHPHLQL]RODFLMVNLKWHNRþLQNLYVHEXMHMR3&%

Guidelines for the inventory control, management, decontamination and or disposal of

electrical equipment and insulating liquids containing PCBs
Ta slovenski standard je istoveten z: CLC/TR 50503:2010
ICS:
29.040.10 Izolacijska olja Insulating oils
SIST-TP CLC/TR 50503:2010 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST-TP CLC/TR 50503:2010
---------------------- Page: 2 ----------------------
SIST-TP CLC/TR 50503:2010
TECHNICAL REPORT
CLC/TR 50503
RAPPORT TECHNIQUE
February 2010
TECHNISCHER BERICHT
ICS 29.040.10
English version
Guidelines for the inventory control, management,
decontamination and/or disposal of electrical equipment
and insulating liquids containing PCBs
This Technical Report was approved by CENELEC on 2009-12-25.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. CLC/TR 50503:2010 E
---------------------- Page: 3 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 2 -
Foreword

This Technical Report has been prepared by CENELEC BTTF 116-1 ‘‘Fluids for electrotechnical

applications’’.

It was circulated for voting in accordance with the Internal Regulations, Part 2, Subclause 11.4.3.3

(simple majority).

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

patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent

rights.
___________
---------------------- Page: 4 ----------------------
SIST-TP CLC/TR 50503:2010
- 3 - CLC/TR 50503:2010
Contents

Introduction ............................................................................................................................ 5

1 Scope ............................................................................................................................. 6

2 Normative references .................................................................................................... 6

3 Terms and Definitions ................................................................................................... 7

4 Inventory and communication ...................................................................................... 10

4.1 PCBs for inventory purposes .................................................................................. 10

4.2 Equipment containing PCBs for inventory .............................................................. 11

4.3 Sampling of insulating liquids ................................................................................. 12

4.4 Analytical determinations of PCBs.......................................................................... 12

4.5 Communications .................................................................................................... 12

5 Labelling ........................................................................................................................ 13

5.1 Labelling of equipment containing PCBs ................................................................ 13

5.2 Labelling of equipments after decontamination ...................................................... 13

6 Managing safety ............................................................................................................ 14

6.1 General prescriptions ............................................................................................. 14

6.2 Personal protection devices ................................................................................... 15

6.3 Handling and transportation ................................................................................... 15

6.4 Actions in case of accidents ................................................................................... 16

6.5 Fires ....................................................................................................................... 17

7 Operation and maintenance ......................................................................................... 17

7.1 General criteria for the evaluation of functional degradation ................................... 17

7.2 Type of monitoring and frequency .......................................................................... 18

7.3 Maintenance interventions ..................................................................................... 21

7.4 Field screening tests .............................................................................................. 22

7.5 Maintenance report ................................................................................................ 22

7.6 Qualification of operators ....................................................................................... 22

8 Decontamination ........................................................................................................... 23

8.1 General requirements............................................................................................. 23

8.2 General principles .................................................................................................. 23

8.3 Decontamination obligations .................................................................................. 24

8.4 Decontamination methodologies and techniques for mineral insulating oil ............. 25

8.5 Decontamination methodologies and techniques for other insulating liquids .......... 26

8.6 Fulfilment of conditions after the decontamination .................................................. 26

8.7 Qualification of operators ....................................................................................... 28

9 End of use ...................................................................................................................... 28

10 Disposal ......................................................................................................................... 28

10.1 Obligations and prohibitions ................................................................................... 28

10.2 Methodologies and techniques for the decontamination and disposal of wastes .... 28

---------------------- Page: 5 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 4 -

Annex A (informative) List of PCBs manufacturers and commercial names....................... 30

Annex B (informative) Example of test report for PCBs inventory ....................................... 33

Annex C (informative) Example of communication forms - Equipment/Container card .... 34

Annex D (informative) Example of communication forms - Registration card .................... 35

Annex E (informative) Example of communication forms -

Decontamination/Disposal card ............................................................................................ 36

Annex F (informative) Example of labels for equipment containing PCBs .......................... 37

Annex G (informative) Labels for decontaminated transformers ......................................... 38

Annex H (informative) Equivalent toxicity (TEF) for some typical commercial

mixtures of PCBs ................................................................................................................... 39

Annex I (informative) Aroclor mixtures composition and TEQs ........................................... 40

Annex J (informative) Typical PCBs clean up levels for surfaces and soil contamination 41

Tables

Table 1 - PCBs family .................................................................................................................... 11

Table 2 - Additional test methods for PCBs insulating liquids of power and strategic

transformers .......................................................................................................................... 19

Table 3- Additional test methods for Askarels insulated equipment ............................................... 20

Table 4 - Recommended types and frequency of tests and inspection .......................................... 21

Table 5 – Time deadline for decontamination and/or disposal of PCBs ......................................... 25

Table A.1 - List of PCBs manufacturers and commercial names ................................................... 30

Table H.1- Equivalent toxicity (referred on 2,3,7,8 TCDD) and non-ortho and mono-ortho

congeners concentration, and DIN congeners in commercial Aroclor PCB mixtures ..................... 39

Table J.1 - Summary of PCBs Cleanup Levels required under US EPA Spill Policy ...................... 41

---------------------- Page: 6 ----------------------
SIST-TP CLC/TR 50503:2010
- 5 - CLC/TR 50503:2010
Introduction

Insulating liquids with PCBs bases (Askarels) or contaminated by PCBs that may still be present

in electrical equipment in the generation, transmission, distribution and use of electric energy.

Polychlorinated biphenyls (PCBs) are a mixture of 209 possible congeners (as defined by

EN 61619). Such compounds of a synthetic origin, have been produced and used in various

commercial mixtures at an international level since 1930 (see Annex A). The chemical stability

and relative non-flammable nature of PCBs was the main reason for their use by the

electrotechnical industry.

The same functional features of these substances created environmental problems: PCBs are,

in fact, classified as hazardous and persistent organic pollutants (POPs) in the environment,

bio-accumulable along the food chain.

It is recognised that oil-filled electrical equipment may have been contaminated by PCBs either

during manufacture or maintenance operations using oils which have been contaminated with

PCBs.

Insulating liquids and equipment containing insulating liquids are classified, respectively, “PCBs”

and “Equipment containing PCBs” when the total concentration of polychlorinated biphenyls

(209 possible congeners) and correlated compounds PCTs (polychlorinated terphenyls-

8 557 possible congeners) and PCBTs (polychlorinated benzyltoluenes-thousands of possible

congeners) present in the insulating liquids exceeds the limits prescribed by current legislation

for the single environmental matrices and/or applications (equipment and insulating liquids in

operation, waste, used oils, fuel oils, etc.).

During their operational life cycle, such equipment and insulating liquids degrade, and may

degrade faster if not properly managed and maintained, inducing failures that could cause

incidents having a significant environmental impact, that can be correlated to the specific site

conditions. In accordance with Directive 96/59/EC, during their service life, equipment

containing PCBs should, under certain conditions, be subject to measures capable of

preventing and/or mitigating degradation processes and the spillage of PCBs, to ensure the

protection of workers, public health and the environment, as well as complying with the

prescriptions of the Stockholm Convention on Persistent Organic Pollutants (POPs) entered into

force on 17 May 2004.

Since the 1980’s, PCBs have been subject to prohibitions and limitations for the marketing and

use: the recent Council Directives and Commission Decisions introduced new obligations for the

inventory, control, management, decontamination and/or disposal of electrical equipment and

insulating liquid containing PCBs.
---------------------- Page: 7 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 6 -
1 Scope

The scope of this Technical report is to provide guidance for the activities of inventory, control,

management, decontamination and/or disposal of equipment and containers with insulating

liquid containing PCBs, in compliance with the Council Directives (96/59/EC), using Best

Available Techniques - BAT - (96/61/EC), Commission Decision (2001/68/EC), Stockholm

Convention on Persistent Organic Pollutants (POPs) and/or with appropriate national or local

legislation.

This Technical report is addressed, in particular, toward the Life Cycle Management (LCM) of

insulating liquids and it has been developed in accordance with the following objectives:

a) reduction of risks for workers, public health and the environment, arising from human

error, malfunction, or failures of the equipment that could cause fires or spillage of

hazardous and Persistent Organic Pollutants (POPS)s;
b) implementation of the “Best Available Techniques” (BAT),”Best Environmental

Practices”(BEP)and methodologies available for safety, whilst taking into account the

surroundings and the criteria of self-sufficiency and functional recovery;

c) technical feasibility of the activities within the prescribed time schedules, taking into

account current legislation and economic feasibility.

NOTE 1 For those CENELEC countries in which the European Directives do not apply, this Technical report has

an informative purpose only. Different limits from those given in the present Technical report are required in some

countries.

NOTE 2 For those countries outside of European Community the Stockholm Convention on Persistent Organic

Pollutants (POPs) should be applied.

NOTE 3 When reading this Technical report, reference should also be made to Annex C of EN 50195 and Annex

B of EN 50225, because in some EU countries (i.e. France, Italy, Poland, Spain, etc.) there are other mandatory

requirements.
2 Normative references

The following referenced documents may be used for the application of this document. For

dated references, only the edition cited applies. For undated references, the latest edition of the

referenced document (including any amendments) applies.
EN 12766-1 Petroleum products and used oils - Determination of PCBs and related
products - Part 1: Separation and determination of selected PCB
congeners by gas chromatography (GC) using an electron capture
detector (ECD)

EN 12766-2:2001 Petroleum products and used oils - Determination of PCBs and related

products - Part 2: Calculation of polychlorinated biphenyl (PCB) content
EN 12766-3 Petroleum products and used oils - Determination of PCBs and related
products - Part 3: Determination and quantification of polychlorinated
terphenyls (PCT) and polychlorinated benzyl toluenes (PCBT) content by
gas chromatography (GC) using an electron capture detector (ECD)

EN 50195 Code of practice for the safe use of fully enclosed askarel-filled electrical

equipment

EN 50225 Code of practice for the safe use of fully enclosed oil-filled electrical

equipment which may be contaminated with PCBs

EN 60567 Oil-filled electrical equipment - Sampling of gases and of oil for analysis

of free and dissolved gases - Guidance (IEC 60567)
EN 60599 Mineral oil-impregnated electrical equipment in service - Guide to the
interpretation of dissolved and free gases analysis (IEC 60599)

EN 61198 Mineral insulating oils - Methods for the determination of 2-furfural and

related compounds (IEC 61198)
---------------------- Page: 8 ----------------------
SIST-TP CLC/TR 50503:2010
- 7 - CLC/TR 50503:2010

EN 61619 Insulating liquids - Contamination by polychlorinated biphenyls (PCBs) -

Method of determination by capillary column gas chromatography
(IEC 61619)
EN 62535 Insulating liquids - Test method for detection of potentially corrosive
sulphur in used and unused insulating oil (IEC 62535)

EN 60296 Fluids for electrotechnical applications - Unused mineral insulating oils

for transformers and switchgear (IEC 60296)
EN 60422:2006 Mineral insulating oils in electrical equipment - Supervision and
maintenance guidance (IEC 60422:2005)

EN 60836 Specifications for unused silicone insulating liquids for electrotechnical

purposes (IEC 60836)

EN 61099 Specification for unused synthetic organic esters for electrical purposes

(IEC 61099)

EN 61203 Synthetic organic esters for electrical purposes - Guide for maintenance

of transformer esters in equipment
EN ISO 9001 Quality management systems - Requirements (ISO 9001)
IEC 60475 Methods of sampling liquid dielectrics
IEC 60588 series Askarels for transformers and capacitors
IEC 60944 Guide for the maintenance of silicone transformer liquids

ASTM D 971 Standard test method for interfacial tension of oil against water by the

ring method

ASTM D 7151 Standard test method for determination of elements in insulating oils by

inductively coupled plasma and atom emission spectrometry (ICP-AES)
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
askarel

synthetic, fireproof insulating liquid which, when decomposed by electrical arc, will evolve

predominantly non combustible gaseous mixtures

NOTE Askarels usually consist of polychlorinated biphenyls with or without the addition of polychlorinated benzenes.

[IEV 212-07-08]
3.2
Best Available Techniques (BAT) and Best Environmental Practices (BEP)

Best Available Techniques (BAT) means the most effective and advanced stage in the

development of activities and their operation methods which indicate the practical suitability of

particular techniques for providing in principle the basis for emission limit values designed to

prevent and, where that is not practicable, generally to reduce emissions and the impact on the

environment as a whole:

• “techniques” shall include both the technology used and the way in which the installation is

designed, built, maintained, operated and decommissioned;

• “available techniques” shall mean those techniques developed on a scale which allows

implementation in the relevant industrial sector, under economically and technically viable

conditions, taking into consideration the costs and advantages, whether or not the

techniques are used or produced inside the member state in question, as long as they are

reasonably accessible to the operator;
---------------------- Page: 9 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 8 -

• “best” shall mean most effective in achieving a high general level of protection of the

environment as a whole
[Council Directive 96/61/EC]

Best Environmental Practices (BEP) means the application of the most appropriate combination

of environmental control measures and strategies (Stockholm Convention Art. 5)
3.3
congener

all the chlorine derivatives of biphenyl, irrespective of the number of chlorine atoms, are termed

congeners
[EN 61619]
3.4
contaminant

foreign substance or material in an insulating liquid, gas or solid, which usually has deleterious

effect on one or more properties
[IEV 212-07-26]
3.5
technical decontamination

procedure of reducing, eliminating and/or decomposing compounds and/or undesired elements

as contaminants on a specific matrix, to the prescribed concentration limit
3.6
decontamination from PCBs

all operations which enable equipment, objects, materials or fluids contaminated by PCBs to be

reused, recycled or disposed of under safe conditions, and which may include replacement,

meaning all operations in which PCBs are replaced by suitable fluids not containing PCBs

[Council Directive 96/59/EC Art. 2, e]

NOTE PCBs decontamination techniques may be applied during the service life of the electrical equipments or at the end of their

life. In the latter case these techniques may be considered as waste treatment. When these techniques are applied during the

service life then they should be considered as maintenance activities.
3.7
dehalogenation of PCBs

method of chemical decontamination and dehalogenating of PCBs down to the prescribed

concentration limit
NOTE Halogenated compounds include PCTs, PCBTs, PCDFs, PCDDs, etc.
3.8
depolarisation

method of decontamination from specific polar compounds or oxidation by products of unused

and used insulating liquid, capable of reinstating the functional features required.

This process includes selective physical and/or chemical reactions applying the best available

techniques
---------------------- Page: 10 ----------------------
SIST-TP CLC/TR 50503:2010
- 9 - CLC/TR 50503:2010
3.9
disposal

operations D8, D9, D10, D12 (only in safe, deep, underground storage in dry rock formations

and only for equipment containing PCBs and used PCBs which cannot be decontaminated) and

D15 provided for in Annex II A of Directive 75/442/EEC
[Council Directive 96/59/EC Art. 2, f]
3.10
equipment containing PCBs

any equipment containing PCBs or having contained PCBs (e.g. transformers, capacitors,

receptacles containing residual stocks) which has not been decontaminated. Equipment of a

type which may contain PCBs shall be treated as if it contains PCBs unless it is reasonable to

assume the contrary
[Council Directive 96/59/EC Art. 2, b]
3.11
failure
end of the capability of a component or system to fulfil the function required
3.12
holder

natural or legal person who is in possession of PCBs, used PCBs and/or equipment containing

PCBs
[Council Directive 96/59/EC Art. 2, d]
3.13
incineration
controlled combustion to degrade materials
3.14
insulating liquid

liquid with negligibly low electrical conductivity, used to separate conducting parts at different

electrical potentials
3.15
maintenance

combination of all technical and administrative actions, including supervision actions, intended

to retain an item in, or restore it to, a state in which it can perform a required function

3.16
reclaiming

elimination of soluble and insoluble contaminants from an insulating liquid by chemical

absorption means, in order to restore properties as close as possible to the original value

NOTE The process may include the use of antioxidants.
3.17
risk

probability value of damage to occur. It is a function of time, failure rate, asset value and

potential damage
---------------------- Page: 11 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 10 -
3.18
PCBs
- polychlorinated biphenyls;
- polychlorinated terphenyls;
- monomethyl-tetrachlorodiphenyl methane, monomethyl-dichloro-diphenyl methane,
monomethyl-dibromo-diphenyl methane;

- any mixture containing any of the above mentioned substances in a total of more than

0,005 % by weight
[Council Directive 96/59/EC Art. 2, a]
3.19
polychlorinated biphenyls
biphenyl substituted by one to 10 chlorine atoms
3.20
treatment

procedure using physical or chemical means with the purpose of reinstating the features of the

fluid and/or environmental matrix near the values desired
3.21
used PCBs

any PCBs which are considered as a waste within the meaning of Directive 75/442/EEC

3.22
waste

any substance or object which the holder discards or intends or is required to discard

NOTE During their service life, electrical equipment and insulating liquids shall not be considered as waste.

4 Inventory and communication

Electrical equipments containing PCB contaminated insulating liquids are not considered waste

whilst in service even if they are subject to the inventory.

The holders of equipment containing PCBs in volume exceeding 5 dm³ (5 l) are required to

provide inventory and report to the authorities in charge, providing the information specified in

4.5.

NOTE 1 The limit of 5 dm³ is intended as referred to the volume of the insulating liquid (PCBs) contained by the equipment; if this is

not known or can be presumed from the data of the plate or other documents of the manufacturer, it should be referred to the total

volume of the equipment.

NOTE 2 Each capacitor in a bank battery should be considered as a single equipment to which the total volume of 5 dm³ applies.

4.1 PCBs for inventory purposes

With the term of PCBs is intended a family of substances including polychlorinated biphenyls

and the products correlated to them listed in Table 1.
---------------------- Page: 12 ----------------------
SIST-TP CLC/TR 50503:2010
- 11 - CLC/TR 50503:2010
Table 1 - PCBs family
Symbols synonyms and
Family of substances
commercial mixtures
Askarels, Aroclor (1242 – 1254 – 1260),
1 Polychlorinated biphenyls
Apirolio, Clophen, Pyralene, etc.
PCT
2 Polychlorinated terphenyls
Aroclor (5442 – 5460 – 5060)
Monomethyl-tetrachlorodiphenyl methane,
Polychlorinated benziltoluenes PCBT
3 Monomethyl-dichloro-diphenyl methane,
Ugilec 141, T4
Monomethyl-dibromo-diphenyl methane
Mineral insulating oils
Any mixture containing any of the above
4 mentioned substances in a total of more
Synthetic insulating liquids such as
than 0,005 % by weight
silicones, alkylbenzenes, etc.

NOTE Directive 96/59/EC expresses the limit concentration as a percentage by weight, whereas technical

standards and common use utilise units of measure such as mg/kg or parts per million (ppm). To clarify, the

conversion ratios are listed here below:
• 0,005 % by weight corresponds to 50 mg/kg, or 50 parts per million (ppm);
• 0,05 % by weight corresponds to 500 mg/kg, or 500 parts per million (ppm).
In this Technical Report, concentrations are always expressed in mg/kg.

Consequently, the designation PCBs includes, besides polychlorinated biphenyls, other families

of substances having a similar level of hazard and thus subject to the same restrictions. The

summation of the concentrations of all the substances mentioned herein constitutes the total

PCBs content to which the limits are referred

Among all the families of substances belonging by definition to the category of PCBs, the

polychlorinated biphenyls, properly designated, had a capillary dissemination, whereas PCTs

and PCBTs have been marketed and used on a more limited scale.

The analytical methods that can be applied in measuring the PCBs content in insulating liquids

and in the relevant containers are described in 4.4.
4.2 Equipment containing PCBs for inventory

For “equipment containing PCBs”, (Directive 96/59/EC), means any equipment containing PCBs

or having contained PCBs (e.g. transformers, resistors, inductors, reactors, switches, capacitors

receptacles containing residual stock, etc.) which has not been decontaminated. Equipment of a

type which may contain PCBs shall be treated as if it contains PCBs unless it is reasonable to

assume the contrary (Article 2, b).

It is also reasonable to assume that equipment containing insulating liquid can be considered

“PCBs free” when one or more of the following conditions occur:

a) the equipment has been acquired with a certificate by the manufacturer guaranteeing that it

was PCBs free and that it has not subsequently been subject to handling of the dielectric or

topping-up with oils containing PCBs. In the event of doubt, it is required that at least a

screening test of the total chlorine content in the insulating liquid is performed (see 7.4);

b) laboratory analytical determinations, performed with methodologies approved by current

regulations are available, certifying a concentration of PCBs not exceeding 50 mg/kg.

c) statistical analysis of appropriate equipment populations shows this to be the case.

If conditions of the above point a) do not occur and it is not possible to perform the

measurements indicated in point b) (because the equipment is sealed, cannot be accessed or it

is difficult to take samples due to operational requirements or any other reason) the equipment

should be considered as “containing PCBs” unless it is reasonable to assume the contrary.

Also, the determination of the concentration of PCBs in insulating liquids is recommended:

---------------------- Page: 13 ----------------------
SIST-TP CLC/TR 50503:2010
CLC/TR 50503:2010 - 12 -

a) if there are reasons to believe that the content of PCBs could have been changed as a

result of maintenance operations as mentioned in 7.3;

b) at the end-of-life and disposal of the equipment or the fluid, and the content of PCBs is not

already known.
4.3 Sampling of insulating liquids

WARNING: Strict control should be undertaken to avoid accidental spills to the environment.

A representative sampling of the insulating liquid should be performed according to IEC 60475:

a) preferably through the lower valve, for equipment so equipped;

b) through the expansion tank (conservator) for equipment not equipped with lower valve or

difficult to access.

If the equipment includes independent circuits or compartments (load tap-changer, insulating

bushings, etc.) each part should be sampled.

It is recommended that qualified personnel only perform the sampling. Also the use of throw-

away materials is recommended to prevent the possibility of cross-contaminations. In case the

sampling materials are reused, they should be properly decontaminated prior to a new sampling

operation.

Together with the sampling operations, a visual inspection is recommended to evaluate possible

spills from the equipme
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.