Groundwaters shall be and shall be deemed to be waters of the state and shall be protected pursuant to the provisions of this chapter with respect to the following activities, which shall be regulated by the director in accordance with the provisions of this chapter and chapter 13.1 of this title:

(1)  Discharge of pollutants onto or beneath the land surface; in a location where it is likely for the pollutants to enter the groundwaters of the state;

(2)  Subsurface containment systems used to store wastewaters, petroleum products, hazardous materials or other pollutants;

(3)  Facilities which treat or provide for disposal of petroleum products, hazardous materials, hazardous waste, solid waste or dredged material;

(4)  Facilities with store bulk quantities of petroleum products, hazardous materials or hazardous waste;

(5)  Facilities and activities which have caused or have the potential to cause a release of pollutants to groundwater;

(6)  Activities undertaken to remediate groundwater quality.