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ISO 18772 Document Information:
Title
Soil quality - Guidance on leaching procedures for subsequent chemical and ecotoxicological testing of soils and soil materials
Qualité du sol - Lignes directrices relatives aux modes opératoires de lixiviation en vue d'essais chimiques et écotoxicologiques ultérieurs des sols et matériaux du sol
International Organization for Standardization
Publication Date:
Feb 15, 2008
Scope:
This International Standard provides guidance on the appropriate
use of leaching tests on soil and soil materials, in order to
determine the leaching behaviour in the framework of impact
assessment, or for compliance and comparison purposes, including
information on the following:
— the choice of leaching tests, depending on the nature of the
problem to be solved and the specific features of the different
tests;
— the interpretation of the test results;
— the limitations of the tests.
In this respect, it is important to keep in mind that leaching
tests do not aim to simulate real field conditions, but are
designed to address the contact between a solid and a liquid phase
for different purposes that are described in this International
Standard.
This International Standard only concerns natural, contaminated
and agricultural soils and soil materials. Questions relating to
the leaching of wastes are not covered by this International
Standard. It also does not cover the subject of bioavailability of
contaminants to living organisms, which is covered by ISO
17402.
Leaching tests are designed and used for characterisation of the
source term. It may be possible to address transport aspects with
leaching tests if some basic requirements are known (e.g.
hydrodynamic), thus allowing the determination of key transport
parameters (e.g. retardation factors, particle-facilitated
transport, attenuation processes).
In this International Standard, when the term "soil" is only
quoted to simplify the writing, the broader term "soil and soil
materials" shall be considered.
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