15. The quality of the groundwater that may be altered because of the storage site must be determined before the site commences operations, in reference to the contaminants likely to be present in the soils to be stored, and thereafter on an annual basis.
The concentration values determined before the site commences operations are to be used as intervention threshold values should concentration values be exceeded at the time of the annual analysis. For that purpose, section 58 applies, with the necessary modifications. During sampling, the groundwater piezometric level must also be measured. If the values are exceeded, section 60 applies.