The test consists of parallel extractions of the material at an L/S=10 (l/kg) for 48 hours at a series of pre-set pH values. pH is one of the main leaching controlling parameters. The information can be used for geochemical speciation modelling, to evaluate high sensitivity (steep concentration - pH slopes) and to provide information on the sensitivity of leaching under externally imposed changes in pH (natural or caused by treatment) in specific field scenarios. In addition, the test provides a measure of acid/base neutralization capacity (ANC/BNC). Advantages & use

The column test is run in up-flow mode. The leachant is demineralised water (DMW). The test material should have a particle size < 4mm. Seven eluate fractions are collected within the range of L/S = 0.1-10 l/kg. The total test duration is approximately 21 days. In ISO TC 190/SC7/WG 6 a percolation leaching test similar to CEN/TS 14405 (inorganic) is in development (ISO/AWI 21268-3). This procedure addresses both inorganic and organic contaminants. Advantages & use

In the test a monolithic specimen is subjected to leaching in a closed tank to evaluate surface area related release. The leachant demineralised water is renewed after 8 hours and 1, 2, 4, 9, 16, 36, 64 days using a leachant to product volume ratio (L/V) of 5. The results are expressed in mg/m2. Advantages & use