Dutch Standards are environmental pollutant reference values used in , investigation and cleanup. The reference values for soil are adjusted for the () content and 0.2 m (lutum - Latin, meaning mud or clay). The values below are calculated for a Standard Soil with 10% organic matter and 25% lutum.The reference values for groundwater depend on the depth of the sample, the values below are for shallow groundwater, 0 - 10 m depth.A case of environmental contamination is defined a
