If groundwater-monitoring wells required under regulation 24(3) or regulation 25(2) are installed in respect of the storage system, an infrastructure owner of the storage system must ensure that sampling and analysis of groundwater, to determine whether petroleum has entered the groundwater –

(a) occurs between 7 and 21 days after the groundwater-monitoring wells are installed in respect of the storage system; and

(b) is carried out in accordance with regulation 6 .

Penalty:  Fine not exceeding 100 penalty units.