30. At least once a year, in the spring or fall, the operator of a contaminated soil burial site must take a grab sample of the leachates present in the collection system installed on the bed of the burial site and in the collection system laid out between the 2 impermeable membranes. The samples must be analysed for the parameters and substances referred to in section 29.
The quantity of leachates present in the collection system between the 2 impermeable membranes shall be measured twice a year, in the spring and fall.