CEN/TR 15252:2006

Characterization of sludges - Protocol for validating methods for physical properties of sludges

This Technical Report specifies procedures for validating characterization methods for physical properties of sludge.
This Technical Report is applicable to sludge and sludge suspensions from:
-   storm water handling;
-   urban wastewater collecting systems;
-   urban wastewater treatment plants;
-   treating industrial wastewater similar to urban wastewater (as defined in Directive 91/271/EEC);
-   water supply treatment plants.
This method is also applicable to sludge suspensions from other origin.

Charakterisierung von Schlämmen - Protokoll für Validierungsmethoden von physikalischen Schlammeigenschaften

Caractérisation des boues - Protocole de validation des méthodes de détermination des propriétés physiques des boues

Karakterizacija blata - Protokol za metode validacije fizikalnih lastnosti blata

General Information

• Status: Published
• Publication Date: 04-Jul-2006
• ICS: 13.030.20 - Liquid wastes. Sludge
• Technical Committee: CEN/TC 308 - Characterization of sludges
• Drafting Committee: CEN/TC 308/WG 1 - Characterization methods
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 05-Jul-2006
• Due Date: 11-Aug-2006
• Completion Date: 05-Jul-2006
• Ref Project: SIST-TP CEN/TR 15252:2007 - Characterization of sludges - Protocol for validating methods for physical properties of sludges

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CEN/TR 15252:2007
01-februar-2007
Karakterizacija blata - Protokol za metode validacije fizikalnih lastnosti blata
Characterization of sludges - Protocol for validating methods for physical properties of
sludges
Charakterisierung von Schlämmen - Protokoll für Validierungsmethoden von
physikalischen Schlammeigenschaften
Caractérisation des boues - Protocole de validation des méthodes de détermination des
propriétés physiques des boues
Ta slovenski standard je istoveten z: CEN/TR 15252:2006
ICS:
13.030.20 7HNRþLRGSDGNL%ODWR Liquid wastes. Sludge
SIST-TP CEN/TR 15252:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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TECHNICAL REPORT
CEN/TR 15252
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
July 2006
ICS 13.030.20

English Version
Characterization of sludges - Protocol for validating methods for
physical properties of sludges
Caractérisation des boues - Protocole de validation des Charakterisierung von Schlämmen - Protokoll für
méthodes de détermination des propriétés physiques des Validierungsmethoden von physikalischen
boues Schlammeigenschaften
This Technical Report was approved by CEN on 7 February 2006. It has been drawn up by the Technical Committee CEN/TC 308.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 15252:2006: E
worldwide for CEN national Members.

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CEN/TR 15252:2006 (E)
Contents Page
Foreword.3
Introduction.4
1 Scope .5
2 Normative references .5
3 Preliminary arrangements .5
4 Conventional round robin tests (C-RRT).5
5 Modified round robin tests (M-RRT) .7
6 Confidence level evaluation (CLE).8
Bibliography. 10

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CEN/TR 15252:2006 (E)
Foreword
This Technical Report (CEN/TR 15252:2006) has been prepared by Technical Committee CEN/TC 308
“Characterization of sludges”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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CEN/TR 15252:2006 (E)
Introduction
To be published as a “standard”, all the methods defined by CEN must be validated through interlaboratory
trials. The validation procedure is carried out after the 6-months enquiry and before the formal vote, in order to
incorporate comments received during enquiry into the final version to be officially approved.
Validation usually consists in analyzing reference samples circulated to many laboratories in different
countries and in evaluating the “repeatability/reproducibility” of measurements, where:
 Repeatability is defined as the ability of a method to reproduce a measurement while being tested under
an unchanging set of conditions. This does not imply that the obtained value is correct, but rather that it is
the same every time;
 Reproducibility is the same as repeatability, but at a different set of conditions. It is therefore a more
realistic indication of a method to reproduce a measurement, whenever a predefined set of conditions
...