The purpose of the project is to provide initial sampling and initial chemical characterization of additional

Groundwater quality monitoring points that are used to meet the requirements for accelerated

Expansion of the groundwater quality monitoring network and for the identification of nitrate-polluted

Areas required according to § 13a Fertiliser Ordinance (AVV GeA, 2022) within North Rhine-Westphalia

Become.

The subject of the tender is the taking of groundwater samples in accordance with DIN 38402-13 from measuring points and wells and the performance of analytical investigations for selected inorganic and organic parameters of the filtered or unfiltered groundwater samples (Lot 1).

The subject of the tender is the taking of groundwater samples according to DIN 38402-13 from measuring points and wells and the implementation of analytical investigations for selected inorganic and organic parameters of the filtered or unfiltered groundwater samples. In the compartment lot (compartment lot 2), a gas-tight sampling of groundwater samples and the determination of dissolved gases (N2, argon) and the so-called excess- N2 (excess- N2; Excess- N2 converted into nitrate).