Suomen ympäristökeskus

This standard describes a method to compare the quality of soils by determining the fatty acid composition of the leaves of plant species grown on these soils. Because plant fatty acid composition can vary as functions of climatic conditions, the areas to compare must share the same climatic conditions (humidity, temperature, sunlight). This method does not make it possible to determine an optimal value of the Omega-3 index, and therefore cannot be used to determine the intrinsic quality of a soil from a specific area (regard as homogeneous). The method can be only used to compare the quality of soils between various areas. This method is applicable to: The Omega-3 index being an early indicator, its measurement is not relevant when a strong visual phenotype (highly reduced biomass, high leaf chlorosis…) is detected for plants having grown on one area, and not detected on another area. Alternatively, the quality of soils can be assessed by determining Omega-3 index of Lactuca sativa seedlings grown on these soils under controlled conditions (i.e. phytotronic chamber) and by comparing it to that obtained on control soils (see Annex A).

This document provides guidance on the range of tests that could be necessary to characterize soil and other soil materials intended to be re-used, with or without preliminary treatment (e.g. screening to remove over large material). It is intended to be of use in determining the suitability of soil materials for re-use (see 3.4.1), and the assessment of the environmental impacts that might arise from re-use. It takes into account the different requirements of topsoil, sub-soil and other soil materials such as sediments or treated soils. International Standard methods are listed that might be of use for characterization. Soil materials include natural soils and other materials (e.g. fill, made ground) excavated, stripped, or otherwise removed from their original in-ground or above-ground location (e.g. stockpile), dredged materials, manufactured soils, and soil treated to remove or destroy contaminants. For manufactured soils, which are often made using excavated materials together with other materials such as “green waste”, the characteristics of the components and of the manufactured product might need to be determined. An overriding principle governing the guidance provided in this document is that when there is to be no change in intended land use at the target site, imported soil materials should not lead to a permanent reduction in performance of relevant soil functions. The guidance provided is intended to cover a range of possible end uses, including: It is not applicable to the placement of soil materials in an aqueous environment or to restore underground workings. It does not address geotechnical requirements when soil materials are to be used as construction material.