Zinc, Medium total content (surface)

The median (synonym: 50. Percentile, central value) used. It is the value above or below which 50 % of all cases in a data group are located. The calculation is carried out on outlier-adjusted data collectives. The total content is determined from the royal water extract (according to DIN ISO 11466 (1997)). The concentration is given in mg/kg. The salary classes take into account, inter alia, the pension values of the BBodSchV (1999). These are 60 mg/kg for the soil type sand, for clay, sludge and heavy sluggish sand at 150 mg/kg and for clay at 200 mg/kg. According to LABO (2003), a sample count of >=20 is required for the calculation of background values. However, groups with a sample count >= 10 are also shown in the map. This information is then only informal and not representative.