The Dutch decision tree on leaching from soil has been re-designed to be more in line with
EU guidelines on the assessment of the leaching potential of substances. The new decision
tree explicitly defines reasonable worst-case conditions as the 90th percentile of the area to
which a substance is applied. The tree also determines whether the median annual leaching
concentration over a period of 20, 40 or 60 years complies with the EU-drinking water limit,
with the length of the period depending on the application frequency. The FOCUS …

The Dutch decision tree on leaching from soil has been re-designed to be more in line with
EU guidelines on the assessment of the leaching potential of substances. The new decision
tree explicitly defines reasonable worst-case conditions as the 90th percentile of the area to
which a substance is applied. The tree also determines whether the median annual leaching
concentration over a period of 20, 40 or 60 years complies with the EU-drinking water limit,
with the length of the period depending on the application frequency. The FOCUS …