6. In order to monitor groundwater quality as required by sections 4 and 5, a monitoring well system must be installed on the land concerned.
The number and location of the monitoring wells in such a system, as well as the number of sampling points that each well must have depends on the area of the land, the prevailing hydrogeological conditions and the number and location of the points of emission of the substances referred to in paragraph 2 of section 5.